STM32F1 cleanup, incl. SoftwareSerial removal (#20046)

Marlin/src/HAL/STM32F1/SoftwareSerial.cpp

@@ -1,60 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-#if defined(__STM32F1__) && !defined(HAVE_SW_SERIAL)
-
-/**
- * Empty class for Software Serial implementation (Custom RX/TX pins)
- *
- * TODO: Optionally use https://github.com/FYSETC/SoftwareSerialM if TMC UART is wanted
- */
-
-#include "SoftwareSerial.h"
-
-// Constructor
-
-SoftwareSerial::SoftwareSerial(int8_t RX_pin, int8_t TX_pin) {}
-
-// Public
-
-void SoftwareSerial::begin(const uint32_t baudrate) {
-}
-
-bool SoftwareSerial::available() {
-  return false;
-}
-
-uint8_t SoftwareSerial::read() {
-  return 0;
-}
-
-uint16_t SoftwareSerial::write(uint8_t byte) {
-  return 0;
-}
-
-void SoftwareSerial::flush() {}
-
-void SoftwareSerial::listen() {
-  listening = true;
-}
-
-void SoftwareSerial::stopListening() {
-  listening = false;
-}
-
-#endif // __STM32F1__

Marlin/src/HAL/STM32F1/SoftwareSerial.h

@@ -1,44 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-#include <stdint.h>
-
-#ifndef HAVE_SW_SERIAL
-   #define SW_SERIAL_PLACEHOLDER 1
-#endif
-
-class SoftwareSerial {
-public:
-  SoftwareSerial(int8_t RX_pin, int8_t TX_pin);
-
-  void begin(const uint32_t baudrate);
-
-  bool available();
-
-  uint8_t read();
-  uint16_t write(uint8_t byte);
-  void flush();
-
-  void listen();
-  void stopListening();
-
-protected:
-  bool listening;
-};

Marlin/src/HAL/STM32F1/build_flags.py

@@ -3,7 +3,7 @@ import sys
 
 #dynamic build flags for generic compile options
 if __name__ == "__main__":
-  args = " ".join([ "-std=gnu11",
+  args = " ".join([ "-std=gnu++14",
                     "-Os",
                     "-mcpu=cortex-m3",
                     "-mthumb",

Marlin/src/HAL/STM32F1/inc/SanityCheck.h

@@ -25,11 +25,6 @@
  * Test STM32F1-specific configuration values for errors at compile-time.
  */
 
-#if !defined(HAVE_SW_SERIAL) && HAS_TMC_SW_SERIAL
-  #warning "With TMC2208/9 consider using SoftwareSerialM with HAVE_SW_SERIAL and appropriate SS_TIMER."
-  #error "Missing SoftwareSerial implementation."
-#endif
-
 #if ENABLED(SDCARD_EEPROM_EMULATION) && DISABLED(SDSUPPORT)
   #undef SDCARD_EEPROM_EMULATION // Avoid additional error noise
   #if USE_FALLBACK_EEPROM