mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-11-22 15:46:14 +01:00
327 lines
9.6 KiB
C++
327 lines
9.6 KiB
C++
/*
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* © 2020-2022 Harald Barth
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*
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* This file is part of CommandStation-EX
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*
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* This 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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* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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// ATTENTION: this file only compiles on an ESP8266 and ESP32
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// On ESP32 we do not even use the functions but they are here for completeness sake
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// Please refer to DCCTimer.h for general comments about how this class works
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// This is to avoid repetition and duplication.
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#ifdef ARDUINO_ARCH_ESP8266
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#include "DCCTimer.h"
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INTERRUPT_CALLBACK interruptHandler=0;
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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interruptHandler=callback;
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timer1_disable();
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// There seem to be differnt ways to attach interrupt handler
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// ETS_FRC_TIMER1_INTR_ATTACH(NULL, NULL);
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// ETS_FRC_TIMER1_NMI_INTR_ATTACH(interruptHandler);
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// Let us choose the one from the API
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timer1_attachInterrupt(interruptHandler);
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// not exactly sure of order:
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timer1_enable(TIM_DIV1, TIM_EDGE, TIM_LOOP);
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timer1_write(CLOCK_CYCLES);
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}
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// We do not support to use PWM to make the Waveform on ESP
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bool IRAM_ATTR DCCTimer::isPWMPin(byte pin) {
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return false;
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}
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void IRAM_ATTR DCCTimer::setPWM(byte pin, bool high) {
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}
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void IRAM_ATTR DCCTimer::clearPWM() {
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}
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// Fake this as it should not be used
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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mac[0] = 0xFE;
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mac[1] = 0xBE;
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mac[2] = 0xEF;
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mac[3] = 0xC0;
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mac[4] = 0xFF;
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mac[5] = 0xEE;
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}
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volatile int DCCTimer::minimum_free_memory=__INT_MAX__;
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// Return low memory value...
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int DCCTimer::getMinimumFreeMemory() {
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noInterrupts(); // Disable interrupts to get volatile value
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int retval = minimum_free_memory;
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interrupts();
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return retval;
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}
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int DCCTimer::freeMemory() {
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return ESP.getFreeHeap();
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}
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#endif
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////////////////////////////////////////////////////////////////////////
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#ifdef ARDUINO_ARCH_ESP32
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#include "esp_idf_version.h"
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#if ESP_IDF_VERSION_MAJOR > 4
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#error "DCC-EX does not support compiling with IDF version 5.0 or later. Downgrade your ESP32 library to a version that contains IDE version 4. Arduino ESP32 library 3.0.0 is too new. Downgrade to one of 2.0.9 to 2.0.17"
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#endif
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#include "DIAG.h"
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#include <driver/adc.h>
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#include <soc/sens_reg.h>
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#include <soc/sens_struct.h>
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#undef ADC_INPUT_MAX_VALUE
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#define ADC_INPUT_MAX_VALUE 4095 // 12 bit ADC
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#define pinToADC1Channel(X) (adc1_channel_t)(((X) > 35) ? (X)-36 : (X)-28)
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int IRAM_ATTR local_adc1_get_raw(int channel) {
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uint16_t adc_value;
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SENS.sar_meas_start1.sar1_en_pad = (1 << channel); // only one channel is selected
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while (SENS.sar_slave_addr1.meas_status != 0);
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SENS.sar_meas_start1.meas1_start_sar = 0;
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SENS.sar_meas_start1.meas1_start_sar = 1;
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while (SENS.sar_meas_start1.meas1_done_sar == 0);
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adc_value = SENS.sar_meas_start1.meas1_data_sar;
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return adc_value;
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}
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#include "DCCTimer.h"
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INTERRUPT_CALLBACK interruptHandler=0;
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// https://www.visualmicro.com/page/Timer-Interrupts-Explained.aspx
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portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
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void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
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// This should not be called on ESP32 so disable it
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return;
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interruptHandler = callback;
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hw_timer_t *timer = NULL;
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timer = timerBegin(0, 2, true); // prescaler can be 2 to 65536 so choose 2
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timerAttachInterrupt(timer, interruptHandler, true);
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timerAlarmWrite(timer, CLOCK_CYCLES / 6, true); // divide by prescaler*3 (Clockbase is 80Mhz and not F_CPU 240Mhz)
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timerAlarmEnable(timer);
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}
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// We do not support to use PWM to make the Waveform on ESP
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bool IRAM_ATTR DCCTimer::isPWMPin(byte pin) {
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return false;
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}
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void IRAM_ATTR DCCTimer::setPWM(byte pin, bool high) {
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}
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void IRAM_ATTR DCCTimer::clearPWM() {
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}
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// Fake this as it should not be used
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void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
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mac[0] = 0xFE;
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mac[1] = 0xBE;
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mac[2] = 0xEF;
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mac[3] = 0xC0;
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mac[4] = 0xFF;
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mac[5] = 0xEE;
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}
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volatile int DCCTimer::minimum_free_memory=__INT_MAX__;
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// Return low memory value...
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int DCCTimer::getMinimumFreeMemory() {
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noInterrupts(); // Disable interrupts to get volatile value
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int retval = minimum_free_memory;
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interrupts();
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return retval;
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}
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int DCCTimer::freeMemory() {
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return ESP.getFreeHeap();
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}
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void DCCTimer::reset() {
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ESP.restart();
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}
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void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t f) {
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if (f >= 16)
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, f);
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/*
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else if (f == 7) // not used on ESP32
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 62500);
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*/
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else if (f >= 4)
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 32000);
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else if (f >= 3)
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 16000);
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else if (f >= 2)
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 3400);
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else if (f == 1)
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 480);
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else
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DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 131);
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}
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#include "esp32-hal.h"
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#include "soc/soc_caps.h"
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#ifdef SOC_LEDC_SUPPORT_HS_MODE
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#define LEDC_CHANNELS (SOC_LEDC_CHANNEL_NUM<<1)
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#else
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#define LEDC_CHANNELS (SOC_LEDC_CHANNEL_NUM)
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#endif
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static int8_t pin_to_channel[SOC_GPIO_PIN_COUNT] = { 0 };
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static int cnt_channel = LEDC_CHANNELS;
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void DCCTimer::DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t frequency) {
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if (pin < SOC_GPIO_PIN_COUNT) {
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if (pin_to_channel[pin] != 0) {
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ledcSetup(pin_to_channel[pin], frequency, 8);
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}
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}
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}
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void DCCTimer::DCCEXledcDetachPin(uint8_t pin) {
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DIAG(F("Clear pin %d channel"), pin);
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pin_to_channel[pin] = 0;
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pinMatrixOutDetach(pin, false, false);
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}
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static byte LEDCToMux[] = {
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LEDC_HS_SIG_OUT0_IDX,
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LEDC_HS_SIG_OUT1_IDX,
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LEDC_HS_SIG_OUT2_IDX,
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LEDC_HS_SIG_OUT3_IDX,
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LEDC_HS_SIG_OUT4_IDX,
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LEDC_HS_SIG_OUT5_IDX,
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LEDC_HS_SIG_OUT6_IDX,
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LEDC_HS_SIG_OUT7_IDX,
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LEDC_LS_SIG_OUT0_IDX,
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LEDC_LS_SIG_OUT1_IDX,
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LEDC_LS_SIG_OUT2_IDX,
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LEDC_LS_SIG_OUT3_IDX,
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LEDC_LS_SIG_OUT4_IDX,
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LEDC_LS_SIG_OUT5_IDX,
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LEDC_LS_SIG_OUT6_IDX,
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LEDC_LS_SIG_OUT7_IDX,
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};
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void DCCTimer::DCCEXledcAttachPin(uint8_t pin, int8_t channel, bool inverted) {
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DIAG(F("Attaching pin %d to channel %d %c"), pin, channel, inverted ? 'I' : ' ');
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ledcAttachPin(pin, channel);
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if (inverted) // we attach again but with inversion
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gpio_matrix_out(pin, LEDCToMux[channel], inverted, 0);
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}
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void DCCTimer::DCCEXanalogCopyChannel(int8_t frompin, int8_t topin) {
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// arguments are signed depending on inversion of pins
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DIAG(F("Pin %d copied to %d"), frompin, topin);
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bool inverted = false;
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if (frompin<0)
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frompin = -frompin;
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if (topin<0) {
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inverted = true;
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topin = -topin;
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}
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int channel = pin_to_channel[frompin]; // after abs(frompin)
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pin_to_channel[topin] = channel;
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DCCTimer::DCCEXledcAttachPin(topin, channel, inverted);
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}
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void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value, bool invert) {
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// This allocates channels 15, 13, 11, ....
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// so each channel gets its own timer.
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if (pin < SOC_GPIO_PIN_COUNT) {
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if (pin_to_channel[pin] == 0) {
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int search_channel;
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int n;
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if (!cnt_channel) {
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log_e("No more PWM channels available! All %u already used", LEDC_CHANNELS);
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return;
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}
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// search for free channels top down
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for (search_channel=LEDC_CHANNELS-1; search_channel >=cnt_channel; search_channel -= 2) {
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bool chanused = false;
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for (n=0; n < SOC_GPIO_PIN_COUNT; n++) {
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if (pin_to_channel[n] == search_channel) { // current search_channel used
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chanused = true;
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break;
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}
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}
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if (chanused)
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continue;
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if (n == SOC_GPIO_PIN_COUNT) // current search_channel unused
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break;
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}
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if (search_channel >= cnt_channel) {
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pin_to_channel[pin] = search_channel;
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DIAG(F("Pin %d assigned to search channel %d"), pin, search_channel);
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} else {
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pin_to_channel[pin] = --cnt_channel; // This sets 15, 13, ...
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DIAG(F("Pin %d assigned to new channel %d"), pin, cnt_channel);
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--cnt_channel; // Now we are at 14, 12, ...
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}
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ledcSetup(pin_to_channel[pin], 1000, 8);
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DCCEXledcAttachPin(pin, pin_to_channel[pin], invert);
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} else {
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// This else is only here so we can enable diag
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// Pin should be already attached to channel
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// DIAG(F("Pin %d assigned to old channel %d"), pin, pin_to_channel[pin]);
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}
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ledcWrite(pin_to_channel[pin], value);
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}
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}
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void DCCTimer::DCCEXInrushControlOn(uint8_t pin, int duty, bool inverted) {
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// this uses hardcoded channel 0
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ledcSetup(0, 62500, 8);
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DCCEXledcAttachPin(pin, 0, inverted);
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ledcWrite(0, duty);
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}
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int ADCee::init(uint8_t pin) {
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pinMode(pin, ANALOG);
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adc1_config_width(ADC_WIDTH_BIT_12);
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// Espressif deprecated ADC_ATTEN_DB_11 somewhere between 2.0.9 and 2.0.17
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#ifdef ADC_ATTEN_11db
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adc1_config_channel_atten(pinToADC1Channel(pin),ADC_ATTEN_11db);
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#else
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adc1_config_channel_atten(pinToADC1Channel(pin),ADC_ATTEN_DB_11);
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#endif
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return adc1_get_raw(pinToADC1Channel(pin));
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}
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int16_t ADCee::ADCmax() {
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return 4095;
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}
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/*
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* Read function ADCee::read(pin) to get value instead of analogRead(pin)
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*/
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int ADCee::read(uint8_t pin, bool fromISR) {
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return local_adc1_get_raw(pinToADC1Channel(pin));
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}
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/*
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* Scan function that is called from interrupt
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*/
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void ADCee::scan() {
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}
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void ADCee::begin() {
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}
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#endif //ESP32
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