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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
- *
- */
- #ifdef ARDUINO_ARCH_ESP32
-
- #include "../../inc/MarlinConfig.h"
-
- #include <rom/rtc.h>
- #include <driver/adc.h>
- #include <esp_adc_cal.h>
- #include <HardwareSerial.h>
-
- #if ENABLED(WIFISUPPORT)
- #include <ESPAsyncWebServer.h>
- #include "wifi.h"
- #if ENABLED(OTASUPPORT)
- #include "ota.h"
- #endif
- #if ENABLED(WEBSUPPORT)
- #include "spiffs.h"
- #include "web.h"
- #endif
- #endif
-
- // ------------------------
- // Externs
- // ------------------------
-
- portMUX_TYPE spinlock = portMUX_INITIALIZER_UNLOCKED;
-
- // ------------------------
- // Local defines
- // ------------------------
-
- #define V_REF 1100
-
- // ------------------------
- // Public Variables
- // ------------------------
-
- uint16_t HAL_adc_result;
-
- // ------------------------
- // Private Variables
- // ------------------------
-
- esp_adc_cal_characteristics_t characteristics[ADC_ATTEN_MAX];
- adc_atten_t attenuations[ADC1_CHANNEL_MAX] = {};
- uint32_t thresholds[ADC_ATTEN_MAX];
- volatile int numPWMUsed = 0,
- pwmPins[MAX_PWM_PINS],
- pwmValues[MAX_PWM_PINS];
-
- // ------------------------
- // Public functions
- // ------------------------
-
- #if ENABLED(WIFI_CUSTOM_COMMAND)
-
- bool wifi_custom_command(char * const command_ptr) {
- #if ENABLED(ESP3D_WIFISUPPORT)
- return esp3dlib.parse(command_ptr);
- #else
- UNUSED(command_ptr);
- return false;
- #endif
- }
-
- #endif
-
- void HAL_init() { i2s_init(); }
-
- void HAL_init_board() {
-
- #if ENABLED(ESP3D_WIFISUPPORT)
- esp3dlib.init();
- #elif ENABLED(WIFISUPPORT)
- wifi_init();
- TERN_(OTASUPPORT, OTA_init());
- #if ENABLED(WEBSUPPORT)
- spiffs_init();
- web_init();
- #endif
- server.begin();
- #endif
-
- // ESP32 uses a GPIO matrix that allows pins to be assigned to hardware serial ports.
- // The following code initializes hardware Serial1 and Serial2 to use user-defined pins
- // if they have been defined.
- #if defined(HARDWARE_SERIAL1_RX) && defined(HARDWARE_SERIAL1_TX)
- HardwareSerial Serial1(1);
- #ifdef TMC_BAUD_RATE // use TMC_BAUD_RATE for Serial1 if defined
- Serial1.begin(TMC_BAUD_RATE, SERIAL_8N1, HARDWARE_SERIAL1_RX, HARDWARE_SERIAL1_TX);
- #else // use default BAUDRATE if TMC_BAUD_RATE not defined
- Serial1.begin(BAUDRATE, SERIAL_8N1, HARDWARE_SERIAL1_RX, HARDWARE_SERIAL1_TX);
- #endif
- #endif
- #if defined(HARDWARE_SERIAL2_RX) && defined(HARDWARE_SERIAL2_TX)
- HardwareSerial Serial2(2);
- #ifdef TMC_BAUD_RATE // use TMC_BAUD_RATE for Serial1 if defined
- Serial2.begin(TMC_BAUD_RATE, SERIAL_8N1, HARDWARE_SERIAL2_RX, HARDWARE_SERIAL2_TX);
- #else // use default BAUDRATE if TMC_BAUD_RATE not defined
- Serial2.begin(BAUDRATE, SERIAL_8N1, HARDWARE_SERIAL2_RX, HARDWARE_SERIAL2_TX);
- #endif
- #endif
-
- }
-
- void HAL_idletask() {
- #if BOTH(WIFISUPPORT, OTASUPPORT)
- OTA_handle();
- #endif
- TERN_(ESP3D_WIFISUPPORT, esp3dlib.idletask());
- }
-
- void HAL_clear_reset_source() { }
-
- uint8_t HAL_get_reset_source() { return rtc_get_reset_reason(1); }
-
- void _delay_ms(int delay_ms) { delay(delay_ms); }
-
- // return free memory between end of heap (or end bss) and whatever is current
- int freeMemory() { return ESP.getFreeHeap(); }
-
- // ------------------------
- // ADC
- // ------------------------
- #define ADC1_CHANNEL(pin) ADC1_GPIO ## pin ## _CHANNEL
-
- adc1_channel_t get_channel(int pin) {
- switch (pin) {
- case 39: return ADC1_CHANNEL(39);
- case 36: return ADC1_CHANNEL(36);
- case 35: return ADC1_CHANNEL(35);
- case 34: return ADC1_CHANNEL(34);
- case 33: return ADC1_CHANNEL(33);
- case 32: return ADC1_CHANNEL(32);
- }
- return ADC1_CHANNEL_MAX;
- }
-
- void adc1_set_attenuation(adc1_channel_t chan, adc_atten_t atten) {
- if (attenuations[chan] != atten) {
- adc1_config_channel_atten(chan, atten);
- attenuations[chan] = atten;
- }
- }
-
- void HAL_adc_init() {
- // Configure ADC
- adc1_config_width(ADC_WIDTH_12Bit);
-
- // Configure channels only if used as (re-)configuring a pin for ADC that is used elsewhere might have adverse effects
- TERN_(HAS_TEMP_ADC_0, adc1_set_attenuation(get_channel(TEMP_0_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_1, adc1_set_attenuation(get_channel(TEMP_1_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_2, adc1_set_attenuation(get_channel(TEMP_2_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_3, adc1_set_attenuation(get_channel(TEMP_3_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_4, adc1_set_attenuation(get_channel(TEMP_4_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_5, adc1_set_attenuation(get_channel(TEMP_5_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_6, adc2_set_attenuation(get_channel(TEMP_6_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_ADC_7, adc3_set_attenuation(get_channel(TEMP_7_PIN), ADC_ATTEN_11db));
- TERN_(HAS_HEATED_BED, adc1_set_attenuation(get_channel(TEMP_BED_PIN), ADC_ATTEN_11db));
- TERN_(HAS_TEMP_CHAMBER, adc1_set_attenuation(get_channel(TEMP_CHAMBER_PIN), ADC_ATTEN_11db));
- TERN_(FILAMENT_WIDTH_SENSOR, adc1_set_attenuation(get_channel(FILWIDTH_PIN), ADC_ATTEN_11db));
-
- // Note that adc2 is shared with the WiFi module, which has higher priority, so the conversion may fail.
- // That's why we're not setting it up here.
-
- // Calculate ADC characteristics (i.e., gain and offset factors for each attenuation level)
- for (int i = 0; i < ADC_ATTEN_MAX; i++) {
- esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t)i, ADC_WIDTH_BIT_12, V_REF, &characteristics[i]);
-
- // Change attenuation 100mV below the calibrated threshold
- thresholds[i] = esp_adc_cal_raw_to_voltage(4095, &characteristics[i]);
- }
- }
-
- void HAL_adc_start_conversion(const uint8_t adc_pin) {
- const adc1_channel_t chan = get_channel(adc_pin);
- uint32_t mv;
- esp_adc_cal_get_voltage((adc_channel_t)chan, &characteristics[attenuations[chan]], &mv);
- HAL_adc_result = mv * 1023.0 / 3300.0;
-
- // Change the attenuation level based on the new reading
- adc_atten_t atten;
- if (mv < thresholds[ADC_ATTEN_DB_0] - 100)
- atten = ADC_ATTEN_DB_0;
- else if (mv > thresholds[ADC_ATTEN_DB_0] - 50 && mv < thresholds[ADC_ATTEN_DB_2_5] - 100)
- atten = ADC_ATTEN_DB_2_5;
- else if (mv > thresholds[ADC_ATTEN_DB_2_5] - 50 && mv < thresholds[ADC_ATTEN_DB_6] - 100)
- atten = ADC_ATTEN_DB_6;
- else if (mv > thresholds[ADC_ATTEN_DB_6] - 50)
- atten = ADC_ATTEN_DB_11;
- else return;
-
- adc1_set_attenuation(chan, atten);
- }
-
- void analogWrite(pin_t pin, int value) {
- // Use ledc hardware for internal pins
- if (pin < 34) {
- static int cnt_channel = 1, pin_to_channel[40] = { 0 };
- if (pin_to_channel[pin] == 0) {
- ledcAttachPin(pin, cnt_channel);
- ledcSetup(cnt_channel, 490, 8);
- ledcWrite(cnt_channel, value);
- pin_to_channel[pin] = cnt_channel++;
- }
- ledcWrite(pin_to_channel[pin], value);
- return;
- }
-
- int idx = -1;
-
- // Search Pin
- for (int i = 0; i < numPWMUsed; ++i)
- if (pwmPins[i] == pin) { idx = i; break; }
-
- // not found ?
- if (idx < 0) {
- // No slots remaining
- if (numPWMUsed >= MAX_PWM_PINS) return;
-
- // Take new slot for pin
- idx = numPWMUsed;
- pwmPins[idx] = pin;
- // Start timer on first use
- if (idx == 0) HAL_timer_start(PWM_TIMER_NUM, PWM_TIMER_FREQUENCY);
-
- ++numPWMUsed;
- }
-
- // Use 7bit internal value - add 1 to have 100% high at 255
- pwmValues[idx] = (value + 1) / 2;
- }
-
- // Handle PWM timer interrupt
- HAL_PWM_TIMER_ISR() {
- HAL_timer_isr_prologue(PWM_TIMER_NUM);
-
- static uint8_t count = 0;
-
- for (int i = 0; i < numPWMUsed; ++i) {
- if (count == 0) // Start of interval
- WRITE(pwmPins[i], pwmValues[i] ? HIGH : LOW);
- else if (pwmValues[i] == count) // End of duration
- WRITE(pwmPins[i], LOW);
- }
-
- // 128 for 7 Bit resolution
- count = (count + 1) & 0x7F;
-
- HAL_timer_isr_epilogue(PWM_TIMER_NUM);
- }
-
- #endif // ARDUINO_ARCH_ESP32
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