273 lines
7.3 KiB
C++
273 lines
7.3 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifdef ARDUINO_ARCH_ESP32
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#include "HAL.h"
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#include "timers.h"
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#include <rom/rtc.h>
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#include <driver/adc.h>
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#include <esp_adc_cal.h>
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#include "../../inc/MarlinConfigPre.h"
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#if ENABLED(WIFISUPPORT)
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#include <ESPAsyncWebServer.h>
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#include "wifi.h"
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#if ENABLED(OTASUPPORT)
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#include "ota.h"
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#endif
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#if ENABLED(WEBSUPPORT)
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#include "spiffs.h"
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#include "web.h"
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#endif
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#endif
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// ------------------------
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// Externs
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// ------------------------
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portMUX_TYPE spinlock = portMUX_INITIALIZER_UNLOCKED;
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// ------------------------
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// Local defines
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// ------------------------
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#define V_REF 1100
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// ------------------------
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// Public Variables
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// ------------------------
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uint16_t HAL_adc_result;
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// ------------------------
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// Private Variables
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// ------------------------
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esp_adc_cal_characteristics_t characteristics[ADC_ATTEN_MAX];
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adc_atten_t attenuations[ADC1_CHANNEL_MAX] = {};
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uint32_t thresholds[ADC_ATTEN_MAX];
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volatile int numPWMUsed = 0,
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pwmPins[MAX_PWM_PINS],
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pwmValues[MAX_PWM_PINS];
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// ------------------------
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// Public functions
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// ------------------------
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#if ENABLED(WIFI_CUSTOM_COMMAND)
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bool wifi_custom_command(char * const command_ptr) {
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#if ENABLED(ESP3D_WIFISUPPORT)
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return esp3dlib.parse(command_ptr);
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#else
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UNUSED(command_ptr);
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return false;
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#endif
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}
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#endif
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void HAL_init() { i2s_init(); }
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void HAL_init_board() {
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#if ENABLED(ESP3D_WIFISUPPORT)
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esp3dlib.init();
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#elif ENABLED(WIFISUPPORT)
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wifi_init();
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#if ENABLED(OTASUPPORT)
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OTA_init();
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#endif
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#if ENABLED(WEBSUPPORT)
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spiffs_init();
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web_init();
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#endif
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server.begin();
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#endif
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}
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void HAL_idletask() {
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#if BOTH(WIFISUPPORT, OTASUPPORT)
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OTA_handle();
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#endif
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}
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void HAL_clear_reset_source() { }
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uint8_t HAL_get_reset_source() { return rtc_get_reset_reason(1); }
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void _delay_ms(int delay_ms) { delay(delay_ms); }
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// return free memory between end of heap (or end bss) and whatever is current
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int freeMemory() { return ESP.getFreeHeap(); }
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// ------------------------
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// ADC
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// ------------------------
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#define ADC1_CHANNEL(pin) ADC1_GPIO ## pin ## _CHANNEL
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adc1_channel_t get_channel(int pin) {
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switch (pin) {
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case 39: return ADC1_CHANNEL(39);
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case 36: return ADC1_CHANNEL(36);
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case 35: return ADC1_CHANNEL(35);
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case 34: return ADC1_CHANNEL(34);
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case 33: return ADC1_CHANNEL(33);
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case 32: return ADC1_CHANNEL(32);
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}
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return ADC1_CHANNEL_MAX;
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}
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void adc1_set_attenuation(adc1_channel_t chan, adc_atten_t atten) {
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if (attenuations[chan] != atten) {
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adc1_config_channel_atten(chan, atten);
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attenuations[chan] = atten;
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}
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}
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void HAL_adc_init() {
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// Configure ADC
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adc1_config_width(ADC_WIDTH_12Bit);
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// Configure channels only if used as (re-)configuring a pin for ADC that is used elsewhere might have adverse effects
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#if HAS_TEMP_ADC_0
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adc1_set_attenuation(get_channel(TEMP_0_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_ADC_1
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adc1_set_attenuation(get_channel(TEMP_1_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_ADC_2
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adc1_set_attenuation(get_channel(TEMP_2_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_ADC_3
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adc1_set_attenuation(get_channel(TEMP_3_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_ADC_4
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adc1_set_attenuation(get_channel(TEMP_4_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_ADC_5
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adc1_set_attenuation(get_channel(TEMP_5_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_HEATED_BED
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adc1_set_attenuation(get_channel(TEMP_BED_PIN), ADC_ATTEN_11db);
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#endif
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#if HAS_TEMP_CHAMBER
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adc1_set_attenuation(get_channel(TEMP_CHAMBER_PIN), ADC_ATTEN_11db);
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#endif
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#if ENABLED(FILAMENT_WIDTH_SENSOR)
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adc1_set_attenuation(get_channel(FILWIDTH_PIN), ADC_ATTEN_11db);
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#endif
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// Note that adc2 is shared with the WiFi module, which has higher priority, so the conversion may fail.
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// That's why we're not setting it up here.
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// Calculate ADC characteristics (i.e., gain and offset factors for each attenuation level)
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for (int i = 0; i < ADC_ATTEN_MAX; i++) {
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esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t)i, ADC_WIDTH_BIT_12, V_REF, &characteristics[i]);
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// Change attenuation 100mV below the calibrated threshold
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thresholds[i] = esp_adc_cal_raw_to_voltage(4095, &characteristics[i]);
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}
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}
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void HAL_adc_start_conversion(const uint8_t adc_pin) {
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const adc1_channel_t chan = get_channel(adc_pin);
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uint32_t mv;
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esp_adc_cal_get_voltage((adc_channel_t)chan, &characteristics[attenuations[chan]], &mv);
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HAL_adc_result = mv * 1023.0 / 3300.0;
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// Change the attenuation level based on the new reading
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adc_atten_t atten;
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if (mv < thresholds[ADC_ATTEN_DB_0] - 100)
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atten = ADC_ATTEN_DB_0;
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else if (mv > thresholds[ADC_ATTEN_DB_0] - 50 && mv < thresholds[ADC_ATTEN_DB_2_5] - 100)
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atten = ADC_ATTEN_DB_2_5;
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else if (mv > thresholds[ADC_ATTEN_DB_2_5] - 50 && mv < thresholds[ADC_ATTEN_DB_6] - 100)
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atten = ADC_ATTEN_DB_6;
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else if (mv > thresholds[ADC_ATTEN_DB_6] - 50)
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atten = ADC_ATTEN_DB_11;
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else return;
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adc1_set_attenuation(chan, atten);
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}
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void analogWrite(pin_t pin, int value) {
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// Use ledc hardware for internal pins
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if (pin < 34) {
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static int cnt_channel = 1, pin_to_channel[40] = { 0 };
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if (pin_to_channel[pin] == 0) {
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ledcAttachPin(pin, cnt_channel);
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ledcSetup(cnt_channel, 490, 8);
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ledcWrite(cnt_channel, value);
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pin_to_channel[pin] = cnt_channel++;
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}
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ledcWrite(pin_to_channel[pin], value);
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return;
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}
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int idx = -1;
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// Search Pin
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for (int i = 0; i < numPWMUsed; ++i)
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if (pwmPins[i] == pin) { idx = i; break; }
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// not found ?
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if (idx < 0) {
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// No slots remaining
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if (numPWMUsed >= MAX_PWM_PINS) return;
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// Take new slot for pin
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idx = numPWMUsed;
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pwmPins[idx] = pin;
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// Start timer on first use
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if (idx == 0) HAL_timer_start(PWM_TIMER_NUM, PWM_TIMER_FREQUENCY);
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++numPWMUsed;
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}
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// Use 7bit internal value - add 1 to have 100% high at 255
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pwmValues[idx] = (value + 1) / 2;
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}
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// Handle PWM timer interrupt
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HAL_PWM_TIMER_ISR() {
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HAL_timer_isr_prologue(PWM_TIMER_NUM);
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static uint8_t count = 0;
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for (int i = 0; i < numPWMUsed; ++i) {
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if (count == 0) // Start of interval
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WRITE(pwmPins[i], pwmValues[i] ? HIGH : LOW);
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else if (pwmValues[i] == count) // End of duration
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WRITE(pwmPins[i], LOW);
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}
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// 128 for 7 Bit resolution
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count = (count + 1) & 0x7F;
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HAL_timer_isr_epilogue(PWM_TIMER_NUM);
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}
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#endif // ARDUINO_ARCH_ESP32
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