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CommandStation-EX/DCCTimerSTM32.cpp
2023-01-17 20:15:30 +08:00

161 lines
4.8 KiB
C++

/*
* © 2022 Paul M. Antoine
* © 2021 Mike S
* © 2021 Harald Barth
* © 2021 Fred Decker
* © 2021 Chris Harlow
* © 2021 David Cutting
* All rights reserved.
*
* This file is part of Asbelos DCC API
*
* This 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.
*
* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
// ATTENTION: this file only compiles on a STM32 based boards
// Please refer to DCCTimer.h for general comments about how this class works
// This is to avoid repetition and duplication.
#ifdef ARDUINO_ARCH_STM32
#include "DCCTimer.h"
#if defined(ARDUINO_NUCLEO_F411RE)
// Nucleo-64 boards don't have Serial1 defined by default
HardwareSerial Serial1(PB7, PA15); // Rx=PB7, Tx=PA15 -- CN7 pins 17 and 21 - F411RE
// Serial2 is defined to use USART2 by default, but is in fact used as the diag console
// via the debugger on the Nucleo-64. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
// Let's define Serial6 as an additional serial port (the only other option for the Nucleo-64s)
HardwareSerial Serial6(PA12, PA11); // Rx=PA12, Tx=PA11 -- CN10 pins 12 and 14 - F411RE
#elif defined(ARDUINO_NUCLEO_F446RE)
// Nucleo-64 boards don't have Serial1 defined by default
HardwareSerial Serial1(PA10, PB6); // Rx=PA10, Tx=PB6 -- CN10 pins 33 and 17 - F446RE
// Serial2 is defined to use USART2 by default, but is in fact used as the diag console
// via the debugger on the Nucleo-64. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
#elif defined(ARDUINO_NUCLEO_F412ZG) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)
// Nucleo-144 boards don't have Serial1 defined by default
HardwareSerial Serial1(PG9, PG14); // Rx=PG9, Tx=PG14 -- D0, D1 - F412ZG/F446ZE
#else
#warning Serial1 not defined
#endif
INTERRUPT_CALLBACK interruptHandler=0;
// Let's use STM32's timer #11 until disabused of this notion
// Timer #11 is used for "servo" library, but as DCC-EX is not using
// this libary, we should be free and clear.
HardwareTimer timer(TIM11);
// Timer IRQ handler
void Timer11_Handler() {
interruptHandler();
}
void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
interruptHandler=callback;
noInterrupts();
// adc_set_sample_rate(ADC_SAMPLETIME_480CYCLES);
timer.pause();
timer.setPrescaleFactor(1);
// timer.setOverflow(CLOCK_CYCLES * 2);
timer.setOverflow(DCC_SIGNAL_TIME, MICROSEC_FORMAT);
timer.attachInterrupt(Timer11_Handler);
timer.refresh();
timer.resume();
interrupts();
}
bool DCCTimer::isPWMPin(byte pin) {
//TODO: SAMD whilst this call to digitalPinHasPWM will reveal which pins can do PWM,
// there's no support yet for High Accuracy, so for now return false
// return digitalPinHasPWM(pin);
return false;
}
void DCCTimer::setPWM(byte pin, bool high) {
// TODO: High Accuracy mode is not supported as yet, and may never need to be
(void) pin;
(void) high;
}
void DCCTimer::clearPWM() {
return;
}
void DCCTimer::getSimulatedMacAddress(byte mac[6]) {
volatile uint32_t *serno1 = (volatile uint32_t *)0x1FFF7A10;
volatile uint32_t *serno2 = (volatile uint32_t *)0x1FFF7A14;
volatile uint32_t *serno3 = (volatile uint32_t *)0x1FFF7A18;
volatile uint32_t m1 = *serno1;
volatile uint32_t m2 = *serno2;
mac[0] = m1 >> 8;
mac[1] = m1 >> 0;
mac[2] = m2 >> 24;
mac[3] = m2 >> 16;
mac[4] = m2 >> 8;
mac[5] = m2 >> 0;
}
volatile int DCCTimer::minimum_free_memory=__INT_MAX__;
// Return low memory value...
int DCCTimer::getMinimumFreeMemory() {
noInterrupts(); // Disable interrupts to get volatile value
int retval = freeMemory();
interrupts();
return retval;
}
extern "C" char* sbrk(int incr);
int DCCTimer::freeMemory() {
char top;
return (int)(&top - reinterpret_cast<char *>(sbrk(0)));
}
void DCCTimer::reset() {
__disable_irq();
NVIC_SystemReset();
while(true) {};
}
int16_t ADCee::ADCmax() {
return 4095;
}
int ADCee::init(uint8_t pin) {
return analogRead(pin);
}
/*
* Read function ADCee::read(pin) to get value instead of analogRead(pin)
*/
int ADCee::read(uint8_t pin, bool fromISR) {
int current;
if (!fromISR) noInterrupts();
current = analogRead(pin);
if (!fromISR) interrupts();
return current;
}
/*
* Scan function that is called from interrupt
*/
void ADCee::scan() {
}
void ADCee::begin() {
noInterrupts();
interrupts();
}
#endif