diff --git a/Marlin/src/core/boards.h b/Marlin/src/core/boards.h
index beaea57354..377147504f 100644
--- a/Marlin/src/core/boards.h
+++ b/Marlin/src/core/boards.h
@@ -366,21 +366,22 @@
#define BOARD_BTT_SKR_PRO_V1_1 4207 // BigTreeTech SKR Pro v1.1 (STM32F407ZG)
#define BOARD_BTT_SKR_PRO_V1_2 4208 // BigTreeTech SKR Pro v1.2 (STM32F407ZG)
#define BOARD_BTT_BTT002_V1_0 4209 // BigTreeTech BTT002 v1.0 (STM32F407VG)
-#define BOARD_BTT_GTR_V1_0 4210 // BigTreeTech GTR v1.0 (STM32F407IGT)
-#define BOARD_LERDGE_K 4211 // Lerdge K (STM32F407ZG)
-#define BOARD_LERDGE_S 4212 // Lerdge S (STM32F407VE)
-#define BOARD_LERDGE_X 4213 // Lerdge X (STM32F407VE)
-#define BOARD_VAKE403D 4214 // VAkE 403D (STM32F446VET6)
-#define BOARD_FYSETC_S6 4215 // FYSETC S6 (STM32F446VET6)
-#define BOARD_FYSETC_S6_V2_0 4216 // FYSETC S6 v2.0 (STM32F446VET6)
-#define BOARD_FYSETC_SPIDER 4217 // FYSETC Spider (STM32F446VET6)
-#define BOARD_FLYF407ZG 4218 // FLYF407ZG (STM32F407ZG)
-#define BOARD_MKS_ROBIN2 4219 // MKS_ROBIN2 (STM32F407ZE)
-#define BOARD_MKS_ROBIN_PRO_V2 4220 // MKS Robin Pro V2 (STM32F407VE)
-#define BOARD_MKS_ROBIN_NANO_V3 4221 // MKS Robin Nano V3 (STM32F407VG)
-#define BOARD_ANET_ET4 4222 // ANET ET4 V1.x (STM32F407VGT6)
-#define BOARD_ANET_ET4P 4223 // ANET ET4P V1.x (STM32F407VGT6)
-#define BOARD_FYSETC_CHEETAH_V20 4224 // FYSETC Cheetah V2.0
+#define BOARD_BTT_E3_RRF 4210 // BigTreeTech E3 RRF (STM32F407VGT6)
+#define BOARD_BTT_GTR_V1_0 4211 // BigTreeTech GTR v1.0 (STM32F407IGT)
+#define BOARD_LERDGE_K 4212 // Lerdge K (STM32F407ZG)
+#define BOARD_LERDGE_S 4213 // Lerdge S (STM32F407VE)
+#define BOARD_LERDGE_X 4214 // Lerdge X (STM32F407VE)
+#define BOARD_VAKE403D 4215 // VAkE 403D (STM32F446VET6)
+#define BOARD_FYSETC_S6 4216 // FYSETC S6 (STM32F446VET6)
+#define BOARD_FYSETC_S6_V2_0 4217 // FYSETC S6 v2.0 (STM32F446VET6)
+#define BOARD_FYSETC_SPIDER 4218 // FYSETC Spider (STM32F446VET6)
+#define BOARD_FLYF407ZG 4219 // FLYF407ZG (STM32F407ZG)
+#define BOARD_MKS_ROBIN2 4220 // MKS_ROBIN2 (STM32F407ZE)
+#define BOARD_MKS_ROBIN_PRO_V2 4221 // MKS Robin Pro V2 (STM32F407VE)
+#define BOARD_MKS_ROBIN_NANO_V3 4222 // MKS Robin Nano V3 (STM32F407VG)
+#define BOARD_ANET_ET4 4223 // ANET ET4 V1.x (STM32F407VGT6)
+#define BOARD_ANET_ET4P 4224 // ANET ET4P V1.x (STM32F407VGT6)
+#define BOARD_FYSETC_CHEETAH_V20 4225 // FYSETC Cheetah V2.0
//
// ARM Cortex M7
diff --git a/Marlin/src/pins/pins.h b/Marlin/src/pins/pins.h
index 7634d49199..c2d6b30703 100644
--- a/Marlin/src/pins/pins.h
+++ b/Marlin/src/pins/pins.h
@@ -594,6 +594,8 @@
#include "stm32f4/pins_BTT_GTR_V1_0.h" // STM32F4 env:BIGTREE_GTR_V1_0 env:BIGTREE_GTR_V1_0_usb_flash_drive
#elif MB(BTT_BTT002_V1_0)
#include "stm32f4/pins_BTT_BTT002_V1_0.h" // STM32F4 env:BIGTREE_BTT002
+#elif MB(BTT_E3_RRF)
+ #include "stm32f4/pins_BTT_E3_RRF.h" // STM32F4 env:BIGTREE_E3_RRF
#elif MB(LERDGE_K)
#include "stm32f4/pins_LERDGE_K.h" // STM32F4 env:LERDGEK env:LERDGEK_usb_flash_drive
#elif MB(LERDGE_S)
diff --git a/Marlin/src/pins/stm32f4/pins_BTT_E3_RRF.h b/Marlin/src/pins/stm32f4/pins_BTT_E3_RRF.h
new file mode 100644
index 0000000000..f808278510
--- /dev/null
+++ b/Marlin/src/pins/stm32f4/pins_BTT_E3_RRF.h
@@ -0,0 +1,375 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ *
+ */
+#pragma once
+
+#if NOT_TARGET(STM32F4)
+ #error "Oops! Select an STM32F4 board in 'Tools > Board.'"
+#endif
+
+#ifndef BOARD_INFO_NAME
+ #define BOARD_INFO_NAME "BTT E3 RRF"
+#endif
+
+#define FPC2_PIN PB11
+#define FPC3_PIN PB10
+#define FPC4_PIN PE12
+#define FPC5_PIN PE13
+#define FPC6_PIN PE14
+#define FPC7_PIN PE15
+#define FPC8_PIN PA3
+#define FPC9_PIN PA2
+#define FPC10_PIN PA8
+#define FPC11_PIN PC15
+#define FPC12_PIN PC14
+#define FPC13_PIN PC13
+#define FPC14_PIN PE6
+#define FPC15_PIN PE5
+#define FPC16_PIN PE4
+#define FPC17_PIN PE3
+
+//#define BTT_E3_RRF_IDEX_BOARD
+
+#ifdef BTT_E3_RRF_IDEX_BOARD
+
+ #define X2_ENABLE_PIN FPC13_PIN // X2EN
+ #define X2_STEP_PIN FPC11_PIN // X2STP
+ #define X2_DIR_PIN FPC10_PIN // X2DIR
+ #define X2_SERIAL_TX_PIN FPC12_PIN // X2UART
+ #define X2_SERIAL_RX_PIN FPC12_PIN // X2UART
+ #if X_HOME_DIR < 0
+ #define X_MAX_PIN FPC2_PIN // X2-STOP
+ #else
+ #define X_MIN_PIN FPC2_PIN // X2-STOP
+ #endif
+
+ #define E1_ENABLE_PIN FPC7_PIN // E1EN
+ #define E1_STEP_PIN FPC5_PIN // E1STP
+ #define E1_DIR_PIN FPC4_PIN // E1DIR
+ #define E1_SERIAL_TX_PIN FPC6_PIN // E1UART
+ #define E1_SERIAL_RX_PIN FPC6_PIN // E1UART
+
+ #ifndef FIL1_RUNOUT2_PIN
+ #define FIL_RUNOUT2_PIN FPC3_PIN // E1-STOP
+ #endif
+
+ #define HEATER_1_PIN FPC16_PIN // "HE1"
+
+ #define PT100_PIN FPC8_PIN // Analog Input "PT100"(INA826)
+ #define TEMP_1_PIN FPC9_PIN // Analog Input "TH1"
+
+ #define FAN1_PIN FPC15_PIN // "FAN0" in IDEX board
+ #define FAN2_PIN FPC14_PIN // "FAN1" in IDEX board
+
+#endif
+
+// Onboard I2C EEPROM
+#define I2C_EEPROM
+#define MARLIN_EEPROM_SIZE 0x1000 // 4KB
+
+//
+// Servos
+//
+#define SERVO0_PIN PB0 // SERVOS
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN PC0 // X-STOP
+#define Y_STOP_PIN PC1 // Y-STOP
+#define Z_STOP_PIN PC2 // Z-STOP
+
+//
+// Z Probe must be this pin
+//
+#define Z_MIN_PROBE_PIN PC5 // PROBE
+
+//
+// Filament Runout Sensor
+//
+#ifndef FIL_RUNOUT_PIN
+ #define FIL_RUNOUT_PIN PC3 // E0-STOP
+#endif
+
+//
+// Power-loss Detection
+//
+#ifndef POWER_LOSS_PIN
+ #define POWER_LOSS_PIN PE0 // Power Loss Detection: PWR-DET
+#endif
+
+//
+// Steppers
+//
+#define X_ENABLE_PIN PD7
+#define X_STEP_PIN PD5
+#define X_DIR_PIN PD4
+
+#define Y_ENABLE_PIN PD3
+#define Y_STEP_PIN PD0
+#define Y_DIR_PIN PA15
+
+#define Z_ENABLE_PIN PD14
+#define Z_STEP_PIN PC6
+#define Z_DIR_PIN PC7
+
+#define E0_ENABLE_PIN PD10
+#define E0_STEP_PIN PD12
+#define E0_DIR_PIN PD13
+
+/**
+ * TMC2208/TMC2209 stepper drivers
+ */
+#if HAS_TMC_UART
+ //
+ // Software serial
+ //
+ #define X_SERIAL_TX_PIN PD6
+ #define X_SERIAL_RX_PIN PD6
+
+ #define Y_SERIAL_TX_PIN PD1
+ #define Y_SERIAL_RX_PIN PD1
+
+ #define Z_SERIAL_TX_PIN PD15
+ #define Z_SERIAL_RX_PIN PD15
+
+ #define E0_SERIAL_TX_PIN PD11
+ #define E0_SERIAL_RX_PIN PD11
+
+ // Reduce baud rate to improve software serial reliability
+ #define TMC_BAUD_RATE 19200
+#endif
+
+//
+// Temperature Sensors
+//
+#define TEMP_BED_PIN PA1 // Analog Input "TB"
+#define TEMP_0_PIN PA0 // Analog Input "TH0"
+
+//
+// Heaters / Fans
+//
+#define HEATER_BED_PIN PB4 // "HB"
+#define HEATER_0_PIN PB3 // "HE0"
+
+#define FAN_PIN PB5 // "FAN0"
+//#define FAN1_PIN PB6 // "FAN1"
+
+#ifndef CONTROLLER_FAN_PIN
+ #define CONTROLLER_FAN_PIN PB6 // "FAN1"
+#endif
+
+#ifndef NEOPIXEL_PIN
+ #define NEOPIXEL_PIN PB7 // LED driving pin
+#endif
+
+#ifndef PS_ON_PIN
+ #define PS_ON_PIN PE1 // Power Supply Control
+#endif
+
+/**
+ * BTT E3 RRF
+ * _____
+ * 5V | 1 2 | GND
+ * (LCD_EN) PE11 | 3 4 | PB1 (LCD_RS)
+ * (LCD_D4) PE10 | 5 6 PB2 (BTN_EN2)
+ * RESET | 7 8 | PE7 (BTN_EN1)
+ * (BTN_ENC) PE9 | 9 10| PE8 (BEEPER)
+ * -----
+ * EXP1
+ */
+
+#if HAS_WIRED_LCD
+
+ #if ENABLED(CR10_STOCKDISPLAY)
+
+ #define BEEPER_PIN PE8
+ #define BTN_ENC PE9
+
+ #define BTN_EN1 PE7
+ #define BTN_EN2 PB2
+
+ #define LCD_PINS_RS PB1
+ #define LCD_PINS_ENABLE PE11
+ #define LCD_PINS_D4 PE10
+
+ // CR10_STOCKDISPLAY default timing is too fast
+ #undef BOARD_ST7920_DELAY_1
+ #undef BOARD_ST7920_DELAY_2
+ #undef BOARD_ST7920_DELAY_3
+
+ #elif ENABLED(ZONESTAR_LCD) // ANET A8 LCD Controller - Must convert to 3.3V - CONNECTING TO 5V WILL DAMAGE THE BOARD!
+
+ #error "CAUTION! ZONESTAR_LCD requires wiring modifications. See 'pins_BTT_E3_RRF.h' for details. Comment out this line to continue."
+
+ #define LCD_PINS_RS PE10
+ #define LCD_PINS_ENABLE PE9
+ #define LCD_PINS_D4 PB1
+ #define LCD_PINS_D5 PB2
+ #define LCD_PINS_D6 PE7
+ #define LCD_PINS_D7 PE8
+ #define ADC_KEYPAD_PIN PB0 // Repurpose servo pin for ADC - CONNECTING TO 5V WILL DAMAGE THE BOARD!
+
+ #elif EITHER(MKS_MINI_12864, ENDER2_STOCKDISPLAY)
+
+ #define BTN_ENC PE9
+ #define BTN_EN1 PE7
+ #define BTN_EN2 PB2
+
+ #define DOGLCD_CS PB1
+ #define DOGLCD_A0 PE10
+ #define DOGLCD_SCK PE8
+ #define DOGLCD_MOSI PE11
+
+ #define FORCE_SOFT_SPI
+ #define LCD_BACKLIGHT_PIN -1
+
+ #elif IS_TFTGLCD_PANEL
+
+ #if ENABLED(TFTGLCD_PANEL_SPI)
+
+ #error "CAUTION! TFTGLCD_PANEL_SPI requires wiring modifications. See 'pins_BTT_E3_RRF.h' for details. Comment out this line to continue."
+
+ /**
+ * TFTGLCD_PANEL_SPI display pinout
+ *
+ * Board Display
+ * _____ _____
+ * 5V | 1 2 | GND (SPI1-MISO) MISO | 1 2 | SCK (SPI1-SCK)
+ * (FREE) PE11 | 3 4 | PB1 (LCD_CS) (PE7) LCD_CS | 3 4 | SD_CS (PB2)
+ * (FREE) PE10 | 5 6 | PB2 (SD_CS) (FREE) | 5 6 | MOSI (SPI1-MOSI)
+ * RESET | 7 8 | PE7 (MOD_RESET) (PE8) SD_DET | 7 8 | (FREE)
+ * (BEEPER) PE9 | 9 10| PE8 (SD_DET) GND | 9 10| 5V
+ * ----- -----
+ * EXP1 EXP1
+ *
+ * Needs custom cable:
+ *
+ * Board Adapter Display
+ * _________
+ * EXP1-1 ----------- EXP1-10
+ * EXP1-2 ----------- EXP1-9
+ * SPI1-4 ----------- EXP1-6
+ * EXP1-4 ----------- FREE
+ * SPI1-3 ----------- EXP1-2
+ * EXP1-6 ----------- EXP1-4
+ * EXP1-7 ----------- FREE
+ * EXP1-8 ----------- EXP1-3
+ * SPI1-1 ----------- EXP1-1
+ * EXP1-10 ----------- EXP1-7
+ */
+
+ #define TFTGLCD_CS PE7
+
+ #endif
+
+ #else
+ #error "Only CR10_STOCKDISPLAY, ZONESTAR_LCD, ENDER2_STOCKDISPLAY, MKS_MINI_12864, and TFTGLCD_PANEL_(SPI|I2C) are currently supported on the BTT_E3_RRF."
+ #endif
+
+ // Alter timing for graphical display
+ #if HAS_MARLINUI_U8GLIB
+ #ifndef BOARD_ST7920_DELAY_1
+ #define BOARD_ST7920_DELAY_1 DELAY_NS(96)
+ #endif
+ #ifndef BOARD_ST7920_DELAY_2
+ #define BOARD_ST7920_DELAY_2 DELAY_NS(48)
+ #endif
+ #ifndef BOARD_ST7920_DELAY_3
+ #define BOARD_ST7920_DELAY_3 DELAY_NS(600)
+ #endif
+ #endif
+
+#endif // HAS_WIRED_LCD
+
+#if BOTH(TOUCH_UI_FTDI_EVE, LCD_FYSETC_TFT81050)
+
+ #error "CAUTION! LCD_FYSETC_TFT81050 requires wiring modifications. See 'pins_BTT_E3_RRF.h' for details. Comment out this line to continue."
+
+ /** FYSETC TFT TFT81050 display pinout
+ *
+ * Board Display
+ * _____ _____
+ * 5V | 1 2 | GND (SPI1-MISO) MISO | 1 2 | SCK (SPI1-SCK)
+ * (FREE) PE11 | 3 4 | PB1 (LCD_CS) (PE7) MOD_RESET | 3 4 | SD_CS (PB2)
+ * (FREE) PE10 | 5 6 | PB2 (SD_CS) (PB1) LCD_CS | 5 6 | MOSI (SPI1-MOSI)
+ * RESET | 7 8 | PE7 (MOD_RESET) (PE8) SD_DET | 7 8 | RESET
+ * (BEEPER) PE9 | 9 10| PE8 (SD_DET) GND | 9 10| 5V
+ * ----- -----
+ * EXP1 EXP1
+ *
+ * Needs custom cable:
+ *
+ * Board Adapter Display
+ * _________
+ * EXP1-1 ----------- EXP1-10
+ * EXP1-2 ----------- EXP1-9
+ * SPI1-4 ----------- EXP1-6
+ * EXP1-4 ----------- EXP1-5
+ * SPI1-3 ----------- EXP1-2
+ * EXP1-6 ----------- EXP1-4
+ * EXP1-7 ----------- EXP1-8
+ * EXP1-8 ----------- EXP1-3
+ * SPI1-1 ----------- EXP1-1
+ * EXP1-10 ----------- EXP1-7
+ */
+
+ #define CLCD_SPI_BUS 1 // SPI1 connector
+
+ #define BEEPER_PIN PE9
+
+ #define CLCD_MOD_RESET PE7
+ #define CLCD_SPI_CS PB1
+
+#endif // TOUCH_UI_FTDI_EVE && LCD_FYSETC_TFT81050
+
+//
+// SD Support
+//
+
+#ifndef SDCARD_CONNECTION
+ #define SDCARD_CONNECTION ONBOARD
+#endif
+
+#if SD_CONNECTION_IS(ONBOARD)
+ #define SDIO_SUPPORT // Use SDIO for onboard SD
+ #define SDIO_D0_PIN PC8
+ #define SDIO_D1_PIN PC9
+ #define SDIO_D2_PIN PC10
+ #define SDIO_D3_PIN PC11
+ #define SDIO_CK_PIN PC12
+ #define SDIO_CMD_PIN PD2
+
+ //#define SDIO_CLOCK 48000000
+ #define SD_DETECT_PIN PC4
+#elif SD_CONNECTION_IS(CUSTOM_CABLE)
+ #error "SD CUSTOM_CABLE is not compatible with BTT E3 RRF."
+#endif
+
+//
+// WIFI
+//
+
+#define ESP_WIFI_MODULE_COM 3 // Must also set either SERIAL_PORT or SERIAL_PORT_2 to this
+#define ESP_WIFI_MODULE_BAUDRATE BAUDRATE // Must use same BAUDRATE as SERIAL_PORT & SERIAL_PORT_2
+#define ESP_WIFI_MODULE_RESET_PIN PA4
+#define ESP_WIFI_MODULE_ENABLE_PIN PA5
+#define ESP_WIFI_MODULE_GPIO0_PIN PA6
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PeripheralPins.c b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PeripheralPins.c
new file mode 100644
index 0000000000..9e42baf210
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PeripheralPins.c
@@ -0,0 +1,363 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2019, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ * Automatically generated from STM32F407Z(E-G)Tx.xml
+ */
+#include
+#include
+
+/* =====
+ * Note: Commented lines are alternative possibilities which are not used by default.
+ * If you change them, you should know what you're doing first.
+ * =====
+ */
+
+//*** ADC ***
+
+#ifdef HAL_ADC_MODULE_ENABLED
+const PinMap PinMap_ADC[] = {
+ {PA_0, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC1_IN0 TH0
+ {PA_1, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC1_IN1 TB
+ {PA_2, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC1_IN2 IDEX TH1
+ {PA_3, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC1_IN3 IDEX INA826 PT100
+ {PA_4, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC1_IN4
+ {PA_5, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC1_IN5
+ {PA_6, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC1_IN6
+ {PA_7, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC1_IN7
+ {PB_0, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC1_IN8
+ {PB_1, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC1_IN9
+ {PC_0, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 10, 0)}, // ADC1_IN10
+ {PC_1, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 11, 0)}, // ADC1_IN11
+ {PC_2, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 12, 0)}, // ADC1_IN12
+ {PC_3, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 13, 0)}, // ADC1_IN13
+ {PC_4, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC1_IN14
+ {PC_5, ADC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC1_IN15
+
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio, 24 ADC
+ {PF_3, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC3_IN9
+ {PF_4, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 14, 0)}, // ADC3_IN14
+ {PF_5, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 15, 0)}, // ADC3_IN15
+ {PF_6, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC3_IN4
+ {PF_7, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC3_IN5
+ {PF_8, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC3_IN6
+ {PF_9, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC3_IN7
+ {PF_10, ADC3, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC3_IN8
+ #endif
+ {NC, NP, 0}
+};
+#endif
+
+//*** DAC ***
+
+#ifdef HAL_DAC_MODULE_ENABLED
+const PinMap PinMap_DAC[] = {
+ {PA_4, DAC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // DAC_OUT1
+ {PA_5, DAC1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // DAC_OUT2
+ {NC, NP, 0}
+};
+#endif
+
+//*** I2C ***
+
+#ifdef HAL_I2C_MODULE_ENABLED
+const PinMap PinMap_I2C_SDA[] = {
+ {PB_7, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PB_9, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PB_11, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
+ {PC_9, I2C3, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C3)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PF_0, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
+ #endif
+ {NC, NP, 0}
+};
+#endif
+
+#ifdef HAL_I2C_MODULE_ENABLED
+const PinMap PinMap_I2C_SCL[] = {
+ {PA_8, I2C3, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C3)},
+ {PB_6, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PB_8, I2C1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C1)},
+ {PB_10, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PF_1, I2C2, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF4_I2C2)},
+ #endif
+ {NC, NP, 0}
+};
+#endif
+
+//*** PWM ***
+
+#ifdef HAL_TIM_MODULE_ENABLED
+const PinMap PinMap_PWM[] = {
+ {PB_3, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 2, 0)}, // TIM2_CH2 HE0
+ {PB_4, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 1, 0)}, // TIM3_CH1 BED
+ {PB_5, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 2, 0)}, // TIM3_CH2 FAN0
+ {PB_6, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 1, 0)}, // TIM4_CH1 FAN1
+ {PE_5, TIM9, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 1, 0)}, // TIM9_CH1 IDEX FAN0
+ {PE_6, TIM9, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 2, 0)}, // TIM9_CH2 IDEX FAN1
+
+ /**
+ * Unused by specifications on BTT E3 RRF. (PLEASE CONFIRM)
+ * Uncomment the corresponding line if you want to have HardwarePWM on some pins.
+ * WARNING: check timers' usage first to avoid conflicts.
+ * If you don't know what you're doing leave things as they are or you WILL break something (including hardware)
+ * If you alter this section DO NOT report bugs to Marlin team since they are most likely caused by you. Thank you.
+ */
+ //{PA_0, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 1, 0)}, // TIM2_CH1
+ //{PA_0, TIM5, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 1, 0)}, // TIM5_CH1
+ //{PA_1, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 2, 0)}, // TIM2_CH2
+ //{PA_1, TIM5, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 2, 0)}, // TIM5_CH2
+ //{PA_2, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 3, 0)}, // TIM2_CH3
+ //{PA_2, TIM5, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 3, 0)}, // TIM5_CH3
+ //{PA_2, TIM9, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 1, 0)}, // TIM9_CH1
+ //{PA_3, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 4, 0)}, // TIM2_CH4
+ //{PA_3, TIM5, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5, 4, 0)}, // TIM5_CH4
+ //{PA_3, TIM9, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9, 2, 0)}, // TIM9_CH2
+ //{PA_5, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 1, 0)}, // TIM2_CH1
+ //{PA_5, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 1, 1)}, // TIM8_CH1N
+ //{PA_6, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 1, 0)}, // TIM3_CH1
+ //{PA_6, TIM13, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM13, 1, 0)},// TIM13_CH1
+ //{PA_7, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 1, 1)}, // TIM1_CH1N
+ //{PA_7, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 2, 0)}, // TIM3_CH2
+ //{PA_7, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 1, 1)}, // TIM8_CH1N
+ //{PA_7, TIM14, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM14, 1, 0)},// TIM14_CH1
+ //{PA_8, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 1, 0)}, // TIM1_CH1
+ //{PA_9, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 2, 0)}, // TIM1_CH2
+ //{PA_10, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 3, 0)}, // TIM1_CH3
+ //{PA_11, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 4, 0)}, // TIM1_CH4
+ //{PA_15, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 1, 0)}, // TIM2_CH1
+ //{PB_0, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 2, 1)}, // TIM1_CH2N
+ //{PB_0, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 3, 0)}, // TIM3_CH3
+ //{PB_0, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 2, 1)}, // TIM8_CH2N
+ //{PB_1, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 3, 1)}, // TIM1_CH3N
+ //{PB_1, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 4, 0)}, // TIM3_CH4
+ //{PB_1, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 3, 1)}, // TIM8_CH3N
+ //{PB_7, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 2, 0)}, // TIM4_CH2
+ //{PB_8, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 3, 0)}, // TIM4_CH3
+ //{PB_9, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 4, 0)}, // TIM4_CH4
+ //{PB_8, TIM10, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10, 1, 0)},// TIM10_CH1
+ //{PB_9, TIM11, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11, 1, 0)},// TIM11_CH1
+ //{PB_10, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 3, 0)}, // TIM2_CH3
+ //{PB_11, TIM2, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2, 4, 0)}, // TIM2_CH4
+ //{PB_13, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 1, 1)}, // TIM1_CH1N
+ //{PB_14, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 2, 1)}, // TIM1_CH2N
+ //{PB_14, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 2, 1)}, // TIM8_CH2N
+ //{PB_14, TIM12, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM12, 1, 0)},// TIM12_CH1
+ //{PB_15, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 3, 1)}, // TIM1_CH3N
+ //{PB_15, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 3, 1)}, // TIM8_CH3N
+ //{PB_15, TIM12, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM12, 2, 0)},// TIM12_CH2
+ //{PC_6, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 1, 0)}, // TIM3_CH1
+ //{PC_6, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 1, 0)}, // TIM8_CH1
+ //{PC_7, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 2, 0)}, // TIM3_CH2
+ //{PC_7, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 2, 0)}, // TIM8_CH2
+ //{PC_8, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 3, 0)}, // TIM3_CH3
+ //{PC_8, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 3, 0)}, // TIM8_CH3
+ //{PC_9, TIM3, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3, 4, 0)}, // TIM3_CH4
+ //{PC_9, TIM8, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM8, 4, 0)}, // TIM8_CH4
+ //{PD_12, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 1, 0)}, // TIM4_CH1
+ //{PD_14, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 3, 0)}, // TIM4_CH3
+ //{PD_13, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 2, 0)}, // TIM4_CH2
+ //{PD_15, TIM4, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4, 4, 0)}, // TIM4_CH4
+ //{PE_8, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 1, 1)}, // TIM1_CH1N
+ //{PE_9, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 1, 0)}, // TIM1_CH1
+ //{PE_10, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 2, 1)}, // TIM1_CH2N
+ //{PE_11, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 2, 0)}, // TIM1_CH2
+ //{PE_12, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 3, 1)}, // TIM1_CH3N
+ //{PE_13, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 3, 0)}, // TIM1_CH3
+ //{PE_14, TIM1, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1, 4, 0)}, // TIM1_CH4
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ //{PF_6, TIM10, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10, 1, 0)}, // TIM10_CH1
+ //{PF_7, TIM11, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11, 1, 0)}, // TIM11_CH1
+ //{PF_8, TIM13, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM13, 1, 0)}, // TIM13_CH1
+ //{PF_9, TIM14, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM14, 1, 0)}, // TIM14_CH1
+ #endif
+ {NC, NP, 0}
+};
+#endif
+
+//*** SERIAL ***
+
+#ifdef HAL_UART_MODULE_ENABLED
+const PinMap PinMap_UART_TX[] = {
+ {PA_0, UART4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+ {PA_2, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PA_9, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PB_6, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PD_8, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PB_10, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PC_6, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ {PC_10, UART4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+ {PC_10, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PC_12, UART5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
+ {PD_5, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PG_14, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ #endif
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_UART_RX[] = {
+ {PA_1, UART4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+ {PA_3, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PA_10, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PB_7, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PD_9, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PB_11, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PC_7, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ {PC_11, UART4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART4)},
+ {PC_11, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PD_2, UART5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_UART5)},
+ {PD_6, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PG_9, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ #endif
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_UART_RTS[] = {
+ {PA_1, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PA_12, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PB_14, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PD_4, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PD_12, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PG_8, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ {PG_12, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ #endif
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_UART_CTS[] = {
+ {PA_0, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PA_11, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
+ {PB_13, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ {PD_3, USART2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
+ {PD_11, USART3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART3)},
+ #if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ {PG_13, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ {PG_15, USART6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
+ #endif
+ {NC, NP, 0}
+};
+#endif
+
+//*** SPI ***
+
+#ifdef HAL_SPI_MODULE_ENABLED
+const PinMap PinMap_SPI_MOSI[] = {
+ {PA_7, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+ {PB_15, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_12, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_SPI_MISO[] = {
+ {PA_6, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+ {PB_14, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_11, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_SPI_SCLK[] = {
+ {PA_5, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+ {PB_13, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_10, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_SPI_SSEL[] = {
+ {PA_4, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+ {PB_12, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PA_15, SPI3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NP, 0}
+};
+#endif
+
+//*** CAN ***
+
+#ifdef HAL_CAN_MODULE_ENABLED
+#error "CAN bus isn't available on this board. Driver should be disabled."
+#endif
+
+//*** ETHERNET ***
+#ifdef HAL_ETH_MODULE_ENABLED
+#error "Ethernet port isn't available on this board. Driver should be disabled."
+#endif
+
+//*** No QUADSPI ***
+
+//*** USB ***
+#ifdef HAL_PCD_MODULE_ENABLED
+const PinMap PinMap_USB_OTG_FS[] = {
+ //{PA_8, USB_OTG_FS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_FS)}, // USB_OTG_FS_SOF
+ //{PA_9, USB_OTG_FS, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, GPIO_AF_NONE)}, // USB_OTG_FS_VBUS
+ //{PA_10, USB_OTG_FS, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_PULLUP, GPIO_AF10_OTG_FS)}, // USB_OTG_FS_ID
+ {PA_11, USB_OTG_FS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_FS)}, // USB_OTG_FS_DM
+ {PA_12, USB_OTG_FS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_FS)}, // USB_OTG_FS_DP
+ {NC, NP, 0}
+};
+
+const PinMap PinMap_USB_OTG_HS[] = { /*
+ #ifdef USE_USB_HS_IN_FS
+ {PB_12, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_PULLUP, GPIO_AF12_OTG_HS_FS)}, // USB_OTG_HS_ID
+ {PB_13, USB_OTG_HS, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, GPIO_AF_NONE)}, // USB_OTG_HS_VBUS
+ {PB_14, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_OTG_HS_FS)}, // USB_OTG_HS_DM
+ {PB_15, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_OTG_HS_FS)}, // USB_OTG_HS_DP
+ #else
+ #error "USB in HS mode isn't supported by the board"
+ {PA_3, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D0
+ {PB_0, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D1
+ {PB_1, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D2
+ {PB_5, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D7
+ {PB_10, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D3
+ {PB_12, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D5
+ {PB_13, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_D6
+ {PC_0, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_STP
+ {PC_2, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_DIR
+ {PC_3, USB_OTG_HS, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_OTG_HS)}, // USB_OTG_HS_ULPI_NXT
+ #endif // USE_USB_HS_IN_FS
+ */
+ {NC, NP, 0}
+};
+
+#ifdef HAL_SD_MODULE_ENABLED
+WEAK const PinMap PinMap_SD[] = {
+ // {PB_8, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D4
+ // {PB_9, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D5
+ // {PC_6, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D6
+ // {PC_7, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D7
+ {PC_8, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D0
+ {PC_9, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D1
+ {PC_10, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D2
+ {PC_11, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF12_SDIO)}, // SDIO_D3
+ {PC_12, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF12_SDIO)}, // SDIO_CK
+ {PD_2, SDIO, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF12_SDIO)}, // SDIO_CMD
+ {NC, NP, 0}
+};
+#endif
+#endif
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PinNamesVar.h b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PinNamesVar.h
new file mode 100644
index 0000000000..b4bb9d45f8
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/PinNamesVar.h
@@ -0,0 +1,50 @@
+/* SYS_WKUP */
+#ifdef PWR_WAKEUP_PIN1
+ SYS_WKUP1 = PA_0,
+#endif
+#ifdef PWR_WAKEUP_PIN2
+ SYS_WKUP2 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN3
+ SYS_WKUP3 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN4
+ SYS_WKUP4 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN5
+ SYS_WKUP5 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN6
+ SYS_WKUP6 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN7
+ SYS_WKUP7 = NC,
+#endif
+#ifdef PWR_WAKEUP_PIN8
+ SYS_WKUP8 = NC,
+#endif
+/* USB */
+#ifdef USBCON
+ USB_OTG_FS_SOF = PA_8,
+ USB_OTG_FS_VBUS = PA_9,
+ USB_OTG_FS_ID = PA_10,
+ USB_OTG_FS_DM = PA_11,
+ USB_OTG_FS_DP = PA_12,
+ USB_OTG_HS_ULPI_D0 = PA_3,
+ USB_OTG_HS_SOF = PA_4,
+ USB_OTG_HS_ULPI_CK = PA_5,
+ USB_OTG_HS_ULPI_D1 = PB_0,
+ USB_OTG_HS_ULPI_D2 = PB_1,
+ USB_OTG_HS_ULPI_D7 = PB_5,
+ USB_OTG_HS_ULPI_D3 = PB_10,
+ USB_OTG_HS_ULPI_D4 = PB_11,
+ USB_OTG_HS_ID = PB_12,
+ USB_OTG_HS_ULPI_D5 = PB_12,
+ USB_OTG_HS_ULPI_D6 = PB_13,
+ USB_OTG_HS_VBUS = PB_13,
+ USB_OTG_HS_DM = PB_14,
+ USB_OTG_HS_DP = PB_15,
+ USB_OTG_HS_ULPI_STP = PC_0,
+ USB_OTG_HS_ULPI_DIR = PC_2,
+ USB_OTG_HS_ULPI_NXT = PC_3,
+#endif
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/hal_conf_extra.h b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/hal_conf_extra.h
new file mode 100644
index 0000000000..6c4a991f33
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/hal_conf_extra.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#define HAL_MODULE_ENABLED
+#define HAL_ADC_MODULE_ENABLED
+#define HAL_CRC_MODULE_ENABLED
+#define HAL_DMA_MODULE_ENABLED
+#define HAL_GPIO_MODULE_ENABLED
+#define HAL_I2C_MODULE_ENABLED
+#define HAL_PWR_MODULE_ENABLED
+#define HAL_RCC_MODULE_ENABLED
+//#define HAL_RTC_MODULE_ENABLED Real Time Clock...do we use it?
+#define HAL_SPI_MODULE_ENABLED
+#define HAL_TIM_MODULE_ENABLED
+#define HAL_USART_MODULE_ENABLED
+#define HAL_CORTEX_MODULE_ENABLED
+//#define HAL_UART_MODULE_ENABLED // by default
+//#define HAL_PCD_MODULE_ENABLED // Since STM32 v3.10700.191028 this is automatically added if any type of USB is enabled (as in Arduino IDE)
+#define HAL_SD_MODULE_ENABLED
+
+#undef HAL_DAC_MODULE_ENABLED
+#undef HAL_FLASH_MODULE_ENABLED
+#undef HAL_CAN_MODULE_ENABLED
+#undef HAL_CAN_LEGACY_MODULE_ENABLED
+#undef HAL_CEC_MODULE_ENABLED
+#undef HAL_CRYP_MODULE_ENABLED
+#undef HAL_DCMI_MODULE_ENABLED
+#undef HAL_DMA2D_MODULE_ENABLED
+#undef HAL_ETH_MODULE_ENABLED
+#undef HAL_NAND_MODULE_ENABLED
+#undef HAL_NOR_MODULE_ENABLED
+#undef HAL_PCCARD_MODULE_ENABLED
+#undef HAL_SRAM_MODULE_ENABLED
+#undef HAL_SDRAM_MODULE_ENABLED
+#undef HAL_HASH_MODULE_ENABLED
+#undef HAL_EXTI_MODULE_ENABLED
+#undef HAL_SMBUS_MODULE_ENABLED
+#undef HAL_I2S_MODULE_ENABLED
+#undef HAL_IWDG_MODULE_ENABLED
+#undef HAL_LTDC_MODULE_ENABLED
+#undef HAL_DSI_MODULE_ENABLED
+#undef HAL_QSPI_MODULE_ENABLED
+#undef HAL_RNG_MODULE_ENABLED
+#undef HAL_SAI_MODULE_ENABLED
+#undef HAL_IRDA_MODULE_ENABLED
+#undef HAL_SMARTCARD_MODULE_ENABLED
+#undef HAL_WWDG_MODULE_ENABLED
+#undef HAL_HCD_MODULE_ENABLED
+#undef HAL_FMPI2C_MODULE_ENABLED
+#undef HAL_SPDIFRX_MODULE_ENABLED
+#undef HAL_DFSDM_MODULE_ENABLED
+#undef HAL_LPTIM_MODULE_ENABLED
+#undef HAL_MMC_MODULE_ENABLED
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/ldscript.ld b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/ldscript.ld
new file mode 100644
index 0000000000..0c060d1751
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/ldscript.ld
@@ -0,0 +1,204 @@
+/*
+*****************************************************************************
+**
+
+** File : LinkerScript.ld
+**
+** Abstract : Linker script for STM32F407ZGTx Device with
+** 1024KByte FLASH, 128KByte RAM
+**
+** Set heap size, stack size and stack location according
+** to application requirements.
+**
+** Set memory bank area and size if external memory is used.
+**
+** Target : STMicroelectronics STM32
+**
+**
+** Distribution: The file is distributed as is, without any warranty
+** of any kind.
+**
+*****************************************************************************
+** @attention
+**
+** © COPYRIGHT(c) 2014 Ac6
+**
+** Redistribution and use in source and binary forms, with or without modification,
+** are permitted provided that the following conditions are met:
+** 1. Redistributions of source code must retain the above copyright notice,
+** this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright notice,
+** this list of conditions and the following disclaimer in the documentation
+** and/or other materials provided with the distribution.
+** 3. Neither the name of Ac6 nor the names of its contributors
+** may be used to endorse or promote products derived from this software
+** without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+*****************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = 0x20020000; /* end of RAM */
+/* Generate a link error if heap and stack don't fit into RAM */
+_Min_Heap_Size = 0x200;; /* required amount of heap */
+_Min_Stack_Size = 0x400;; /* required amount of stack */
+
+/* Specify the memory areas */
+MEMORY
+{
+FLASH (rx) : ORIGIN = 0x8008000, LENGTH = 1024K
+RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K
+CCMRAM (rw) : ORIGIN = 0x10000000, LENGTH = 64K
+}
+
+/* Define output sections */
+SECTIONS
+{
+ /* The startup code goes first into FLASH */
+ .isr_vector :
+ {
+ . = ALIGN(4);
+ KEEP(*(.isr_vector)) /* Startup code */
+ . = ALIGN(4);
+ } >FLASH
+
+ /* The program code and other data goes into FLASH */
+ .text ALIGN(4):
+ {
+ . = ALIGN(4);
+ *(.text) /* .text sections (code) */
+ *(.text*) /* .text* sections (code) */
+ *(.glue_7) /* glue arm to thumb code */
+ *(.glue_7t) /* glue thumb to arm code */
+ *(.eh_frame)
+
+ KEEP (*(.init))
+ KEEP (*(.fini))
+
+ . = ALIGN(4);
+ _etext = .; /* define a global symbols at end of code */
+ } >FLASH
+
+ /* Constant data goes into FLASH */
+ .rodata ALIGN(4):
+ {
+ . = ALIGN(4);
+ *(.rodata) /* .rodata sections (constants, strings, etc.) */
+ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
+ . = ALIGN(4);
+ } >FLASH
+
+ .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
+ .ARM : {
+ __exidx_start = .;
+ *(.ARM.exidx*)
+ __exidx_end = .;
+ } >FLASH
+
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array*))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ } >FLASH
+ .init_array :
+ {
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array*))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ } >FLASH
+ .fini_array :
+ {
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(SORT(.fini_array.*)))
+ KEEP (*(.fini_array*))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ } >FLASH
+
+ /* used by the startup to initialize data */
+ _sidata = LOADADDR(.data);
+
+ /* Initialized data sections goes into RAM, load LMA copy after code */
+ .data :
+ {
+ . = ALIGN(4);
+ _sdata = .; /* create a global symbol at data start */
+ *(.data) /* .data sections */
+ *(.data*) /* .data* sections */
+
+ . = ALIGN(4);
+ _edata = .; /* define a global symbol at data end */
+ } >RAM AT> FLASH
+
+ _siccmram = LOADADDR(.ccmram);
+
+ /* CCM-RAM section
+ *
+ * IMPORTANT NOTE!
+ * If initialized variables will be placed in this section,
+ * the startup code needs to be modified to copy the init-values.
+ */
+ .ccmram :
+ {
+ . = ALIGN(4);
+ _sccmram = .; /* create a global symbol at ccmram start */
+ *(.ccmram)
+ *(.ccmram*)
+
+ . = ALIGN(4);
+ _eccmram = .; /* create a global symbol at ccmram end */
+ } >CCMRAM AT> FLASH
+
+
+ /* Uninitialized data section */
+ . = ALIGN(4);
+ .bss :
+ {
+ /* This is used by the startup in order to initialize the .bss secion */
+ _sbss = .; /* define a global symbol at bss start */
+ __bss_start__ = _sbss;
+ *(.bss)
+ *(.bss*)
+ *(COMMON)
+
+ . = ALIGN(4);
+ _ebss = .; /* define a global symbol at bss end */
+ __bss_end__ = _ebss;
+ } >RAM
+
+ /* User_heap_stack section, used to check that there is enough RAM left */
+ ._user_heap_stack :
+ {
+ . = ALIGN(4);
+ PROVIDE ( end = . );
+ PROVIDE ( _end = . );
+ . = . + _Min_Heap_Size;
+ . = . + _Min_Stack_Size;
+ . = ALIGN(4);
+ } >RAM
+
+ /* Remove information from the standard libraries */
+ /DISCARD/ :
+ {
+ libc.a ( * )
+ libm.a ( * )
+ libgcc.a ( * )
+ }
+
+ .ARM.attributes 0 : { *(.ARM.attributes) }
+}
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.cpp b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.cpp
new file mode 100644
index 0000000000..1486b21830
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.cpp
@@ -0,0 +1,260 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+
+#include "pins_arduino.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Pin number
+// This array allows to wrap Arduino pin number(Dx or x)
+// to STM32 PinName (PX_n)
+const PinName digitalPin[] = {
+#if STM32F4X_PIN_NUM >= 64 //64 pins mcu, 51 gpio
+ PC_13, //D0
+ PC_14, //D1 - OSC32_IN
+ PC_15, //D2 - OSC32_OUT
+ PH_0, //D3 - OSC_IN
+ PH_1, //D4 - OSC_OUT
+ PB_2, //D5 - BOOT1
+ PB_10, //D6 - 1:SPI2_SCK / I2C2_SCL / USART3_TX / TIM2_CH3
+ PB_11, //D7 - 1:I2C2_SDA / USART3_RX / TIM2_CH4
+ PB_12, //D8 - 1:SPI2_NSS / OTG_HS_ID
+ PB_13, //D9 - 1:SPI2_SCK 2:OTG_HS_VBUS
+ PB_14, //D10 - 1:SPI2_MISO / TIM12_CH1 / OTG_HS_DM
+ PB_15, //D11 - SPI2_MOSI / TIM12_CH2 / OTG_HS_DP
+ PC_6, //D12 - 1:TIM8_CH1 / SDIO_D6 / USART6_TX / TIM3_CH1
+ PC_7, //D13 - 1:TIM8_CH2 / SDIO_D7 / USART6_RX / TIM3_CH2
+ PC_8, //D14 - 1:TIM8_CH3 / SDIO_D0 / TIM3_CH3
+ PC_9, //D15 - 1:TIM8_CH4 / SDIO_D1 / TIM3_CH4
+ PA_8, //D16 - 1:TIM1_CH1 / I2C3_SCL / OTG_FS_SOF
+ PA_9, //D17 - 1:USART1_TX / TIM1_CH2 2:OTG_FS_VBUS
+ PA_10, //D18 - 1:USART1_RX / TIM1_CH3 / OTG_FS_ID
+ PA_11, //D19 - 1:TIM1_CH4 / OTG_FS_DM
+ PA_12, //D20 - 1:OTG_FS_DP
+ PA_13, //D21 - 0:JTMS-SWDIO
+ PA_14, //D22 - 0:JTCK-SWCLK
+ PA_15, //D23 - 0:JTDI 1:SPI3_NSS / SPI1_NSS
+ PC_10, //D24 - 1:UART4_TX / SPI3_SCK / SDIO_D2 / USART3_TX
+ PC_11, //D25 - 1:UART4_RX / SPI3_MISO / SDIO_D3 / USART3_RX
+ PC_12, //D26 - 1:UART5_TX / SPI3_MOSI / SDIO_CK
+ PD_2, //D27 - 1:UART5_RX / SDIO_CMD
+ PB_3, //D28 - 0:JTDO 1:SPI3_SCK / TIM2_CH2 / SPI1_SCK
+ PB_4, //D29 - 0:NJTRST 1:SPI3_MISO / TIM3_CH1 / SPI1_MISO
+ PB_5, //D30 - 1:TIM3_CH2 / SPI1_MOSI / SPI3_MOSI
+ PB_6, //D31 - 1:I2C1_SCL / TIM4_CH1 / USART1_TX
+ PB_7, //D32 - 1:I2C1_SDA / TIM4_CH2 / USART1_RX
+ PB_8, //D33 - 1:I2C1_SCL / TIM4_CH3 / SDIO_D4 / TIM10_CH1
+ PB_9, //D34 - 1:I2C1_SDA / TIM4_CH4 / SDIO_D5 / TIM11_CH1 / SPI2_NSS
+ PA_0, //D35/A0 - 1:UART4_TX / TIM5_CH1 2:ADC123_IN0
+ PA_1, //D36/A1 - 1:UART4_RX / TIM5_CH2 / TIM2_CH2 2:ADC123_IN1
+ PA_2, //D37/A2 - 1:USART2_TX /TIM5_CH3 / TIM9_CH1 / TIM2_CH3 2:ADC123_IN2
+ PA_3, //D38/A3 - 1:USART2_RX /TIM5_CH4 / TIM9_CH2 / TIM2_CH4 2:ADC123_IN3
+ PA_4, //D39/A4 - NOT FT 1:SPI1_NSS / SPI3_NSS / USART2_CK 2:ADC12_IN4 / DAC_OUT1
+ PA_5, //D40/A5 - NOT FT 1:SPI1_SCK 2:ADC12_IN5 / DAC_OUT2
+ PA_6, //D41/A6 - 1:SPI1_MISO / TIM13_CH1 / TIM3_CH1 2:ADC12_IN6
+ PA_7, //D42/A7 - 1:SPI1_MOSI / TIM14_CH1 / TIM3_CH2 2:ADC12_IN7
+ PB_0, //D43/A8 - 1:TIM3_CH3 2:ADC12_IN8
+ PB_1, //D44/A9 - 1:TIM3_CH4 2:ADC12_IN9
+ PC_0, //D45/A10 - 1: 2:ADC123_IN10
+ PC_1, //D46/A11 - 1: 2:ADC123_IN11
+ PC_2, //D47/A12 - 1:SPI2_MISO 2:ADC123_IN12
+ PC_3, //D48/A13 - 1:SPI2_MOSI 2:ADC123_IN13
+ PC_4, //D49/A14 - 1: 2:ADC12_IN14
+ PC_5, //D50/A15 - 1: 2:ADC12_IN15
+ #if STM32F4X_PIN_NUM >= 144
+ PF_3, //D51/A16 - 1:FSMC_A3 2:ADC3_IN9
+ PF_4, //D52/A17 - 1:FSMC_A4 2:ADC3_IN14
+ PF_5, //D53/A18 - 1:FSMC_A5 2:ADC3_IN15
+ PF_6, //D54/A19 - 1:TIM10_CH1 2:ADC3_IN4
+ PF_7, //D55/A20 - 1:TIM11_CH1 2:ADC3_IN5
+ PF_8, //D56/A21 - 1:TIM13_CH1 2:ADC3_IN6
+ PF_9, //D57/A22 - 1;TIM14_CH1 2:ADC3_IN7
+ PF_10, //D58/A23 - 2:ADC3_IN8
+ #endif
+#endif
+#if STM32F4X_PIN_NUM >= 100 //100 pins mcu, 82 gpio
+ PE_2, //D59 - 1:FSMC_A23
+ PE_3, //D60 - 1:FSMC_A19
+ PE_4, //D61 - 1:FSMC_A20
+ PE_5, //D62 - 1:FSMC_A21
+ PE_6, //D63 - 1:FSMC_A22
+ PE_7, //D64 - 1:FSMC_D4
+ PE_8, //D65 - 1:FSMC_D5
+ PE_9, //D66 - 1:FSMC_D6 / TIM1_CH1
+ PE_10, //D67 - 1:FSMC_D7
+ PE_11, //D68 - 1:FSMC_D8 / TIM1_CH2
+ PE_12, //D69 - 1:FSMC_D9
+ PE_13, //D70 - 1:FSMC_D10 / TIM1_CH3
+ PE_14, //D71 - 1:FSMC_D11 / TIM1_CH4
+ PE_15, //D72 - 1:FSMC_D12
+ PD_8, //D73 - 1:FSMC_D13 / USART3_TX
+ PD_9, //D74 - 1:FSMC_D14 / USART3_RX
+ PD_10, //D75 - 1:FSMC_D15
+ PD_11, //D76 - 1:FSMC_A16
+ PD_12, //D77 - 1:FSMC_A17 / TIM4_CH1
+ PD_13, //D78 - 1:FSMC_A18 / TIM4_CH2
+ PD_14, //D79 - 1:FSMC_D0 / TIM4_CH3
+ PD_15, //D80 - 1:FSMC_D1 / TIM4_CH4
+ PD_0, //D81 - 1:FSMC_D2
+ PD_1, //D82 - 1:FSMC_D3
+ PD_3, //D83 - 1:FSMC_CLK
+ PD_4, //D84 - 1:FSMC_NOE
+ PD_5, //D85 - 1:USART2_TX
+ PD_6, //D86 - 1:USART2_RX
+ PD_7, //D87
+ PE_0, //D88
+ PE_1, //D89
+#endif
+#if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ PF_0, //D90 - 1:FSMC_A0 / I2C2_SDA
+ PF_1, //D91 - 1:FSMC_A1 / I2C2_SCL
+ PF_2, //D92 - 1:FSMC_A2
+ PF_11, //D93
+ PF_12, //D94 - 1:FSMC_A6
+ PF_13, //D95 - 1:FSMC_A7
+ PF_14, //D96 - 1:FSMC_A8
+ PF_15, //D97 - 1:FSMC_A9
+ PG_0, //D98 - 1:FSMC_A10
+ PG_1, //D99 - 1:FSMC_A11
+ PG_2, //D100 - 1:FSMC_A12
+ PG_3, //D101 - 1:FSMC_A13
+ PG_4, //D102 - 1:FSMC_A14
+ PG_5, //D103 - 1:FSMC_A15
+ PG_6, //D104
+ PG_7, //D105
+ PG_8, //D106
+ PG_9, //D107 - 1:USART6_RX
+ PG_10, //D108 - 1:FSMC_NE3
+ PG_11, //D109
+ PG_12, //D110 - 1:FSMC_NE4
+ PG_13, //D111 - 1:FSMC_A24
+ PG_14, //D112 - 1:FSMC_A25 / USART6_TX
+ PG_15, //D113
+#endif
+#if STM32F4X_PIN_NUM >= 176 //176 pins mcu, 140 gpio
+ PI_8, //D114
+ PI_9, //D115
+ PI_10, //D116
+ PI_11, //D117
+ PH_2, //D118
+ PH_3, //D119
+ PH_4, //D120 - 1:I2C2_SCL
+ PH_5, //D121 - 1:I2C2_SDA
+ PH_6, //D122 - 1:TIM12_CH1
+ PH_7, //D123 - 1:I2C3_SCL
+ PH_8, //D124 - 1:I2C3_SDA
+ PH_9, //D125 - 1:TIM12_CH2
+ PH_10, //D126 - 1:TIM5_CH1
+ PH_11, //D127 - 1:TIM5_CH2
+ PH_12, //D128 - 1:TIM5_CH3
+ PH_13, //D129
+ PH_14, //D130
+ PH_15, //D131
+ PI_0, //D132 - 1:TIM5_CH4 / SPI2_NSS
+ PI_1, //D133 - 1:SPI2_SCK
+ PI_2, //D134 - 1:TIM8_CH4 /SPI2_MISO
+ PI_3, //D135 - 1:SPI2_MOS
+ PI_4, //D136
+ PI_5, //D137 - 1:TIM8_CH1
+ PI_6, //D138 - 1:TIM8_CH2
+ PI_7, //D139 - 1:TIM8_CH3
+#endif
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+// ------------------------
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ /**
+ * @brief System Clock Configuration
+ * @param None
+ * @retval None
+ */
+WEAK void SystemClock_Config() {
+
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+
+ /**Configure the main internal regulator output voltage
+ */
+ __HAL_RCC_PWR_CLK_ENABLE();
+
+ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+ /**Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+ RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+ RCC_OscInitStruct.PLL.PLLM = 8;
+ RCC_OscInitStruct.PLL.PLLN = 336;
+ RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+ RCC_OscInitStruct.PLL.PLLQ = 7;
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+ _Error_Handler(__FILE__, __LINE__);
+ }
+
+ /**Initializes the CPU, AHB and APB busses clocks
+ */
+ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
+ | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
+ RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
+
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) {
+ _Error_Handler(__FILE__, __LINE__);
+ }
+
+ /**Configure the Systick interrupt time
+ */
+ HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);
+
+ /**Configure the Systick
+ */
+ HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+ /* SysTick_IRQn interrupt configuration */
+ HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.h b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.h
new file mode 100644
index 0000000000..42f21ce5a6
--- /dev/null
+++ b/buildroot/share/PlatformIO/variants/BIGTREE_E3_RRF/variant.h
@@ -0,0 +1,292 @@
+/*
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif // __cplusplus
+
+/*----------------------------------------------------------------------------
+ * Pins
+ *----------------------------------------------------------------------------*/
+
+#ifdef STM32F405RX
+ #define STM32F4X_PIN_NUM 64 //64 pins mcu, 51 gpio
+ #define STM32F4X_GPIO_NUM 51
+ #define STM32F4X_ADC_NUM 16
+#elif defined(STM32F407_5VX)
+ #define STM32F4X_PIN_NUM 100 //100 pins mcu, 82 gpio
+ #define STM32F4X_GPIO_NUM 82
+ #define STM32F4X_ADC_NUM 16
+#elif defined(STM32F407_5ZX)
+ #define STM32F4X_PIN_NUM 144 //144 pins mcu, 114 gpio
+ #define STM32F4X_GPIO_NUM 114
+ #define STM32F4X_ADC_NUM 24
+#elif defined(STM32F407IX)
+ #define STM32F4X_PIN_NUM 176 //176 pins mcu, 140 gpio
+ #define STM32F4X_GPIO_NUM 140
+ #define STM32F4X_ADC_NUM 24
+#else
+ #error "no match MCU defined"
+#endif
+
+#if STM32F4X_PIN_NUM >= 64 //64 pins mcu, 51 gpio
+ #define PC13 0
+ #define PC14 1 //OSC32_IN
+ #define PC15 2 //OSC32_OUT
+ #define PH0 3 //OSC_IN
+ #define PH1 4 //OSC_OUT
+ #define PB2 5 //BOOT1
+ #define PB10 6 //1:SPI2_SCK / I2C2_SCL / USART3_TX / TIM2_CH3
+ #define PB11 7 //1:I2C2_SDA / USART3_RX / TIM2_CH4
+ #define PB12 8 //1:SPI2_NSS / OTG_HS_ID
+ #define PB13 9 //1:SPI2_SCK 2:OTG_HS_VBUS
+ #define PB14 10 //1:SPI2_MISO / TIM12_CH1 / OTG_HS_DM
+ #define PB15 11 //SPI2_MOSI / TIM12_CH2 / OTG_HS_DP
+ #define PC6 12 //1:TIM8_CH1 / SDIO_D6 / USART6_TX / TIM3_CH1
+ #define PC7 13 //1:TIM8_CH2 / SDIO_D7 / USART6_RX / TIM3_CH2
+ #define PC8 14 //1:TIM8_CH3 / SDIO_D0 / TIM3_CH3
+ #define PC9 15 //1:TIM8_CH4 / SDIO_D1 / TIM3_CH4
+ #define PA8 16 //1:TIM1_CH1 / I2C3_SCL / OTG_FS_SOF
+ #define PA9 17 //1:USART1_TX / TIM1_CH2 2:OTG_FS_VBUS
+ #define PA10 18 //1:USART1_RX / TIM1_CH3 / OTG_FS_ID
+ #define PA11 19 //1:TIM1_CH4 / OTG_FS_DM
+ #define PA12 20 //1:OTG_FS_DP
+ #define PA13 21 //0:JTMS-SWDIO
+ #define PA14 22 //0:JTCK-SWCLK
+ #define PA15 23 //0:JTDI 1:SPI3_NSS / SPI1_NSS
+ #define PC10 24 //1:UART4_TX / SPI3_SCK / SDIO_D2 / USART3_TX
+ #define PC11 25 //1:UART4_RX / SPI3_MISO / SDIO_D3 / USART3_RX
+ #define PC12 26 //1:UART5_TX / SPI3_MOSI / SDIO_CK
+ #define PD2 27 //1:UART5_RX / SDIO_CMD
+ #define PB3 28 //0:JTDO 1:SPI3_SCK / TIM2_CH2 / SPI1_SCK
+ #define PB4 29 //0:NJTRST 1:SPI3_MISO / TIM3_CH1 / SPI1_MISO
+ #define PB5 30 //1:TIM3_CH2 / SPI1_MOSI / SPI3_MOSI
+ #define PB6 31 //1:I2C1_SCL / TIM4_CH1 / USART1_TX
+ #define PB7 32 //1:I2C1_SDA / TIM4_CH2 / USART1_RX
+ #define PB8 33 //1:I2C1_SCL / TIM4_CH3 / SDIO_D4 / TIM10_CH1
+ #define PB9 34 //1:I2C1_SDA / TIM4_CH4 / SDIO_D5 / TIM11_CH1 / SPI2_NSS
+ #define PA0 35 //1:UART4_TX / TIM5_CH1 2:ADC123_IN0
+ #define PA1 36 //1:UART4_RX / TIM5_CH2 / TIM2_CH2 2:ADC123_IN1
+ #define PA2 37 //1:USART2_TX /TIM5_CH3 / TIM9_CH1 / TIM2_CH3 2:ADC123_IN2
+ #define PA3 38 //1:USART2_RX /TIM5_CH4 / TIM9_CH2 / TIM2_CH4 2:ADC123_IN3
+ #define PA4 39 //NOT FT 1:SPI1_NSS / SPI3_NSS / USART2_CK 2:ADC12_IN4 / DAC_OUT1
+ #define PA5 40 //NOT FT 1:SPI1_SCK 2:ADC12_IN5 / DAC_OUT2
+ #define PA6 41 //1:SPI1_MISO / TIM13_CH1 / TIM3_CH1 2:ADC12_IN6
+ #define PA7 42 //1:SPI1_MOSI / TIM14_CH1 / TIM3_CH2 2:ADC12_IN7
+ #define PB0 43 //1:TIM3_CH3 2:ADC12_IN8
+ #define PB1 44 //1:TIM3_CH4 2:ADC12_IN9
+ #define PC0 45 //1: 2:ADC123_IN10
+ #define PC1 46 //1: 2:ADC123_IN11
+ #define PC2 47 //1:SPI2_MISO 2:ADC123_IN12
+ #define PC3 48 //1:SPI2_MOSI 2:ADC123_IN13
+ #define PC4 49 //1: 2:ADC12_IN14
+ #define PC5 50 //1: 2:ADC12_IN15
+ #if STM32F4X_PIN_NUM >= 144
+ #define PF3 51 //1:FSMC_A3 2:ADC3_IN9
+ #define PF4 52 //1:FSMC_A4 2:ADC3_IN14
+ #define PF5 53 //1:FSMC_A5 2:ADC3_IN15
+ #define PF6 54 //1:TIM10_CH1 2:ADC3_IN4
+ #define PF7 55 //1:TIM11_CH1 2:ADC3_IN5
+ #define PF8 56 //1:TIM13_CH1 2:ADC3_IN6
+ #define PF9 57 //1;TIM14_CH1 2:ADC3_IN7
+ #define PF10 58 //2:ADC3_IN8
+ #endif
+#endif
+#if STM32F4X_PIN_NUM >= 100 //100 pins mcu, 82 gpio
+ #define PE2 (35+STM32F4X_ADC_NUM) //1:FSMC_A23
+ #define PE3 (36+STM32F4X_ADC_NUM) //1:FSMC_A19
+ #define PE4 (37+STM32F4X_ADC_NUM) //1:FSMC_A20
+ #define PE5 (38+STM32F4X_ADC_NUM) //1:FSMC_A21
+ #define PE6 (39+STM32F4X_ADC_NUM) //1:FSMC_A22
+ #define PE7 (40+STM32F4X_ADC_NUM) //1:FSMC_D4
+ #define PE8 (41+STM32F4X_ADC_NUM) //1:FSMC_D5
+ #define PE9 (42+STM32F4X_ADC_NUM) //1:FSMC_D6 / TIM1_CH1
+ #define PE10 (43+STM32F4X_ADC_NUM) //1:FSMC_D7
+ #define PE11 (44+STM32F4X_ADC_NUM) //1:FSMC_D8 / TIM1_CH2
+ #define PE12 (45+STM32F4X_ADC_NUM) //1:FSMC_D9
+ #define PE13 (46+STM32F4X_ADC_NUM) //1:FSMC_D10 / TIM1_CH3
+ #define PE14 (47+STM32F4X_ADC_NUM) //1:FSMC_D11 / TIM1_CH4
+ #define PE15 (48+STM32F4X_ADC_NUM) //1:FSMC_D12
+ #define PD8 (49+STM32F4X_ADC_NUM) //1:FSMC_D13 / USART3_TX
+ #define PD9 (50+STM32F4X_ADC_NUM) //1:FSMC_D14 / USART3_RX
+ #define PD10 (51+STM32F4X_ADC_NUM) //1:FSMC_D15
+ #define PD11 (52+STM32F4X_ADC_NUM) //1:FSMC_A16
+ #define PD12 (53+STM32F4X_ADC_NUM) //1:FSMC_A17 / TIM4_CH1
+ #define PD13 (54+STM32F4X_ADC_NUM) //1:FSMC_A18 / TIM4_CH2
+ #define PD14 (55+STM32F4X_ADC_NUM) //1:FSMC_D0 / TIM4_CH3
+ #define PD15 (56+STM32F4X_ADC_NUM) //1:FSMC_D1 / TIM4_CH4
+ #define PD0 (57+STM32F4X_ADC_NUM) //1:FSMC_D2
+ #define PD1 (58+STM32F4X_ADC_NUM) //1:FSMC_D3
+ #define PD3 (59+STM32F4X_ADC_NUM) //1:FSMC_CLK
+ #define PD4 (60+STM32F4X_ADC_NUM) //1:FSMC_NOE
+ #define PD5 (61+STM32F4X_ADC_NUM) //1:USART2_TX
+ #define PD6 (62+STM32F4X_ADC_NUM) //1:USART2_RX
+ #define PD7 (63+STM32F4X_ADC_NUM)
+ #define PE0 (64+STM32F4X_ADC_NUM)
+ #define PE1 (65+STM32F4X_ADC_NUM)
+#endif
+#if STM32F4X_PIN_NUM >= 144 //144 pins mcu, 114 gpio
+ #define PF0 (66+STM32F4X_ADC_NUM) //1:FSMC_A0 / I2C2_SDA
+ #define PF1 (67+STM32F4X_ADC_NUM) //1:FSMC_A1 / I2C2_SCL
+ #define PF2 (68+STM32F4X_ADC_NUM) //1:FSMC_A2
+ #define PF11 (69+STM32F4X_ADC_NUM)
+ #define PF12 (70+STM32F4X_ADC_NUM) //1:FSMC_A6
+ #define PF13 (71+STM32F4X_ADC_NUM) //1:FSMC_A7
+ #define PF14 (72+STM32F4X_ADC_NUM) //1:FSMC_A8
+ #define PF15 (73+STM32F4X_ADC_NUM) //1:FSMC_A9
+ #define PG0 (74+STM32F4X_ADC_NUM) //1:FSMC_A10
+ #define PG1 (75+STM32F4X_ADC_NUM) //1:FSMC_A11
+ #define PG2 (76+STM32F4X_ADC_NUM) //1:FSMC_A12
+ #define PG3 (77+STM32F4X_ADC_NUM) //1:FSMC_A13
+ #define PG4 (78+STM32F4X_ADC_NUM) //1:FSMC_A14
+ #define PG5 (79+STM32F4X_ADC_NUM) //1:FSMC_A15
+ #define PG6 (80+STM32F4X_ADC_NUM)
+ #define PG7 (81+STM32F4X_ADC_NUM)
+ #define PG8 (82+STM32F4X_ADC_NUM)
+ #define PG9 (83+STM32F4X_ADC_NUM) //1:USART6_RX
+ #define PG10 (84+STM32F4X_ADC_NUM) //1:FSMC_NE3
+ #define PG11 (85+STM32F4X_ADC_NUM)
+ #define PG12 (86+STM32F4X_ADC_NUM) //1:FSMC_NE4
+ #define PG13 (87+STM32F4X_ADC_NUM) //1:FSMC_A24
+ #define PG14 (88+STM32F4X_ADC_NUM) //1:FSMC_A25 / USART6_TX
+ #define PG15 (89+STM32F4X_ADC_NUM)
+#endif
+#if STM32F4X_PIN_NUM >= 176 //176 pins mcu, 140 gpio
+ #define PI8 (90+STM32F4X_ADC_NUM)
+ #define PI9 (91+STM32F4X_ADC_NUM)
+ #define PI10 (92+STM32F4X_ADC_NUM)
+ #define PI11 (93+STM32F4X_ADC_NUM)
+ #define PH2 (94+STM32F4X_ADC_NUM)
+ #define PH3 (95+STM32F4X_ADC_NUM)
+ #define PH4 (96+STM32F4X_ADC_NUM) //1:I2C2_SCL
+ #define PH5 (97+STM32F4X_ADC_NUM) //1:I2C2_SDA
+ #define PH6 (98+STM32F4X_ADC_NUM) //1:TIM12_CH1
+ #define PH7 (99+STM32F4X_ADC_NUM) //1:I2C3_SCL
+ #define PH8 (100+STM32F4X_ADC_NUM) //1:I2C3_SDA
+ #define PH9 (101+STM32F4X_ADC_NUM) //1:TIM12_CH2
+ #define PH10 (102+STM32F4X_ADC_NUM) //1:TIM5_CH1
+ #define PH11 (103+STM32F4X_ADC_NUM) //1:TIM5_CH2
+ #define PH12 (104+STM32F4X_ADC_NUM) //1:TIM5_CH3
+ #define PH13 (105+STM32F4X_ADC_NUM)
+ #define PH14 (106+STM32F4X_ADC_NUM)
+ #define PH15 (107+STM32F4X_ADC_NUM)
+ #define PI0 (108+STM32F4X_ADC_NUM) //1:TIM5_CH4 / SPI2_NSS
+ #define PI1 (109+STM32F4X_ADC_NUM) //1:SPI2_SCK
+ #define PI2 (110+STM32F4X_ADC_NUM) //1:TIM8_CH4 /SPI2_MISO
+ #define PI3 (111+STM32F4X_ADC_NUM) //1:SPI2_MOS
+ #define PI4 (112+STM32F4X_ADC_NUM)
+ #define PI5 (113+STM32F4X_ADC_NUM) //1:TIM8_CH1
+ #define PI6 (114+STM32F4X_ADC_NUM) //1:TIM8_CH2
+ #define PI7 (115+STM32F4X_ADC_NUM) //1:TIM8_CH3
+#endif
+
+// This must be a literal
+#define NUM_DIGITAL_PINS (STM32F4X_GPIO_NUM)
+// This must be a literal with a value less than or equal to MAX_ANALOG_INPUTS
+#define NUM_ANALOG_INPUTS (STM32F4X_ADC_NUM)
+#define NUM_ANALOG_FIRST 35
+
+// Below ADC, DAC and PWM definitions already done in the core
+// Could be redefined here if needed
+// ADC resolution is 12bits
+//#define ADC_RESOLUTION 12
+//#define DACC_RESOLUTION 12
+
+// PWM resolution
+/*
+ * BEWARE:
+ * Changing this value from the default (1000) will affect the PWM output value of analogWrite (to a PWM pin)
+ * Since the pin is toggled on capture, if you change the frequency of the timer you have to adapt the compare value (analogWrite thinks you did)
+ */
+//#define PWM_FREQUENCY 20000
+//The bottom values are the default and don't need to be redefined
+//#define PWM_RESOLUTION 8
+//#define PWM_MAX_DUTY_CYCLE 255
+
+// Below SPI and I2C definitions already done in the core
+// Could be redefined here if differs from the default one
+// SPI Definitions
+#define PIN_SPI_MOSI PA7
+#define PIN_SPI_MISO PA6
+#define PIN_SPI_SCK PA5
+#define PIN_SPI_SS PA4
+
+// I2C Definitions
+#define PIN_WIRE_SDA PB9
+#define PIN_WIRE_SCL PB8
+
+// Timer Definitions
+//Do not use timer used by PWM pins when possible. See PinMap_PWM in PeripheralPins.c
+#define TIMER_TONE TIM7
+#define TIMER_SERVO TIM5
+#define TIMER_SERIAL TIM8
+
+// UART Definitions
+// Define here Serial instance number to map on Serial generic name
+#define SERIAL_UART_INSTANCE 1 //ex: 2 for Serial2 (USART2)
+// DEBUG_UART could be redefined to print on another instance than 'Serial'
+//#define DEBUG_UART ((USART_TypeDef *) U(S)ARTX) // ex: USART3
+// DEBUG_UART baudrate, default: 9600 if not defined
+//#define DEBUG_UART_BAUDRATE x
+// DEBUG_UART Tx pin name, default: the first one found in PinMap_UART_TX for DEBUG_UART
+//#define DEBUG_PINNAME_TX PX_n // PinName used for TX
+
+// Default pin used for 'Serial' instance (ex: ST-Link)
+// Mandatory for Firmata
+#define PIN_SERIAL_RX PA10
+#define PIN_SERIAL_TX PA9
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+/*----------------------------------------------------------------------------
+ * Arduino objects - C++ only
+ *----------------------------------------------------------------------------*/
+
+#ifdef __cplusplus
+// These serial port names are intended to allow libraries and architecture-neutral
+// sketches to automatically default to the correct port name for a particular type
+// of use. For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
+// the first hardware serial port whose RX/TX pins are not dedicated to another use.
+//
+// SERIAL_PORT_MONITOR Port which normally prints to the Arduino Serial Monitor
+//
+// SERIAL_PORT_USBVIRTUAL Port which is USB virtual serial
+//
+// SERIAL_PORT_LINUXBRIDGE Port which connects to a Linux system via Bridge library
+//
+// SERIAL_PORT_HARDWARE Hardware serial port, physical RX & TX pins.
+//
+// SERIAL_PORT_HARDWARE_OPEN Hardware serial ports which are open for use. Their RX & TX
+// pins are NOT connected to anything by default.
+#define SERIAL_PORT_MONITOR Serial
+#define SERIAL_PORT_HARDWARE Serial1
+#endif
diff --git a/ini/stm32f4.ini b/ini/stm32f4.ini
index 0e8a8c6b05..881dd17b01 100644
--- a/ini/stm32f4.ini
+++ b/ini/stm32f4.ini
@@ -173,6 +173,20 @@ build_unflags = -DUSBCON -DUSBD_USE_CDC
build_flags = ${stm_flash_drive.build_flags}
-DSTM32F407_5ZX -DVECT_TAB_OFFSET=0x8000
+#
+# BigTreeTech E3 RRF (STM32F407VGT6 ARM Cortex-M4)
+#
+[env:BIGTREE_E3_RRF]
+platform = ${common_stm32.platform}
+extends = common_stm32
+board = genericSTM32F407VGT6
+board_build.variant = BIGTREE_E3_RRF
+build_flags = ${common_stm32.build_flags}
+ -DSTM32F407_5VX -DVECT_TAB_OFFSET=0x8000
+ -DSERIAL_RX_BUFFER_SIZE=255 -DSERIAL_TX_BUFFER_SIZE=255
+extra_scripts = ${common.extra_scripts}
+ pre:buildroot/share/PlatformIO/scripts/generic_create_variant.py
+
#
# Bigtreetech GTR V1.0 (STM32F407IGT6 ARM Cortex-M4)
#