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variable frequency step #1

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This commit is contained in:
Harald Barth 2023-12-30 21:23:44 +01:00
parent bd44184f57
commit adb8b56c92
5 changed files with 115 additions and 81 deletions
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1
DCCTimer.h
View File

@ -85,6 +85,7 @@ class DCCTimer {
static void reset();
private:
static void DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t frequency);
static int freeMemory();
static volatile int minimum_free_memory;
static const int DCC_SIGNAL_TIME=58; // this is the 58uS DCC 1-bit waveform half-cycle

71
DCCTimerAVR.cpp
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@ -29,6 +29,7 @@
#include <avr/boot.h>
#include <avr/wdt.h>
#include "DCCTimer.h"
#include "DIAG.h"
#ifdef DEBUG_ADC
#include "TrackManager.h"
#endif
@ -125,6 +126,76 @@ void DCCTimer::reset() {
}
void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t f) {
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, f);
}
void DCCTimer::DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t fbits) {
#if defined(ARDUINO_AVR_UNO)
// Not worth doin something here as:
// If we are on pin 9 or 10 we are on Timer1 and we can not touch Timer1 as that is our DCC source.
// If we are on pin 5 or 6 we are on Timer 0 ad we can not touch Timer0 as that is millis() etc.
// We are most likely not on pin 3 or 11 as no known motor shield has that as brake.
#endif
#if defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
uint8_t abits;
uint8_t bbits;
if (pin == 9 || pin == 10) { // timer 2 is different
if (fbits >= 3)
abits = B11;
else
abits = B01;
if (fbits >= 3)
bbits = B0001;
else if (fbits == 2)
bbits = B0010;
else if (fbits == 1)
bbits = B0100;
else
bbits = B0110;
TCCR2A = (TCCR2A & B11111100) | abits; // set WGM0 and WGM1
TCCR2B = (TCCR2B & B11110000) | bbits; // set WGM2 and 3 bits of prescaler
DIAG(F("Timer 2 A=%x B=%x"), TCCR2A, TCCR2B);
} else { // not timer 9 or 10
abits = B01;
if (fbits >= 3)
bbits = B1001;
else if (fbits == 2)
bbits = B0010;
else if (fbits == 1)
bbits = B0011;
else
bbits = B0100;
switch (pin) {
// case 9 and 10 taken care of above by if()
case 6:
case 7:
case 8:
// Timer4
TCCR4A = (TCCR4A & B11111100) | abits; // set WGM0 and WGM1
TCCR4B = (TCCR4B & B11100000) | bbits; // set WGM2 and WGM3 and divisor
DIAG(F("Timer 4 A=%x B=%x"), TCCR4A, TCCR4B);
break;
case 46:
case 45:
case 44:
// Timer5
TCCR5A = (TCCR5A & B11111100) | abits; // set WGM0 and WGM1
TCCR5B = (TCCR5B & B11100000) | bbits; // set WGM2 and WGM3 and divisor
DIAG(F("Timer 5 A=%x B=%x"), TCCR5A, TCCR5B);
break;
default:
break;
}
}
#endif
}
#if defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
#define NUM_ADC_INPUTS 16
#else

16
DCCTimerESP.cpp
View File

@ -151,10 +151,22 @@ void DCCTimer::reset() {
ESP.restart();
}
void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t f) {
if (f >= 16)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, f);
else if (f >= 3)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 62500);
else if (f == 2)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 3400);
else if (f == 1)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 480);
else
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 131);
}
#include "esp32-hal.h"
#include "soc/soc_caps.h"
#ifdef SOC_LEDC_SUPPORT_HS_MODE
#define LEDC_CHANNELS (SOC_LEDC_CHANNEL_NUM<<1)
#else
@ -164,7 +176,7 @@ void DCCTimer::reset() {
static int8_t pin_to_channel[SOC_GPIO_PIN_COUNT] = { 0 };
static int cnt_channel = LEDC_CHANNELS;
void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t frequency) {
void DCCTimer::DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t frequency) {
if (pin < SOC_GPIO_PIN_COUNT) {
if (pin_to_channel[pin] != 0) {
ledcSetup(pin_to_channel[pin], frequency, 8);

15
DCCTimerSTM32.cpp
View File

@ -257,6 +257,19 @@ void DCCTimer::reset() {
while(true) {};
}
void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t f) {
if (f >= 16)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, f);
else if (f >= 3)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 62500);
else if (f == 2)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 3400);
else if (f == 1)
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 480);
else
DCCTimer::DCCEXanalogWriteFrequencyInternal(pin, 131);
}
// TODO: rationalise the size of these... could really use sparse arrays etc.
static HardwareTimer * pin_timer[100] = {0};
static uint32_t channel_frequency[100] = {0};
@ -267,7 +280,7 @@ static uint32_t pin_channel[100] = {0};
// sophisticated about detecting any clash between the timer we'd like to use for PWM and the ones
// currently used for HA so they don't interfere with one another. For now we'll just make PWM
// work well... then work backwards to integrate with HA mode if we can.
void DCCTimer::DCCEXanalogWriteFrequency(uint8_t pin, uint32_t frequency)
void DCCTimer::DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t frequency)
{
if (pin_timer[pin] == NULL) {
// Automatically retrieve TIM instance and channel associated to pin

89
MotorDriver.cpp
View File

@ -328,45 +328,19 @@ uint16_t taurustones[28] = { 165, 175, 196, 220,
void MotorDriver::setDCSignal(byte speedcode) {
if (brakePin == UNUSED_PIN)
return;
switch(brakePin) {
#if defined(ARDUINO_AVR_UNO)
// Not worth doin something here as:
// If we are on pin 9 or 10 we are on Timer1 and we can not touch Timer1 as that is our DCC source.
// If we are on pin 5 or 6 we are on Timer 0 ad we can not touch Timer0 as that is millis() etc.
// We are most likely not on pin 3 or 11 as no known motor shield has that as brake.
#endif
#if defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
case 9:
case 10:
// Timer2 (is differnet)
TCCR2A = (TCCR2A & B11111100) | B00000001; // set WGM1=0 and WGM0=1 phase correct PWM
TCCR2B = (TCCR2B & B11110000) | B00000110; // set WGM2=0 ; set divisor on timer 2 to 1/256 for 122.55Hz
//DIAG(F("2 A=%x B=%x"), TCCR2A, TCCR2B);
break;
case 6:
case 7:
case 8:
// Timer4
TCCR4A = (TCCR4A & B11111100) | B00000001; // set WGM0=1 and WGM1=0 for normal PWM 8-bit
TCCR4B = (TCCR4B & B11100000) | B00000100; // set WGM2=0 and WGM3=0 for normal PWM 8 bit and div 1/256 for 122.55Hz
break;
case 46:
case 45:
case 44:
// Timer5
TCCR5A = (TCCR5A & B11111100) | B00000001; // set WGM0=1 and WGM1=0 for normal PWM 8-bit
TCCR5B = (TCCR5B & B11100000) | B00000100; // set WGM2=0 and WGM3=0 for normal PWM 8 bit and div 1/256 for 122.55Hz
break;
#endif
default:
break;
}
// spedcoode is a dcc speed & direction
byte tSpeed=speedcode & 0x7F; // DCC Speed with 0,1 stop and speed steps 2 to 127
byte tDir=speedcode & 0x80;
byte brake;
if (tSpeed <= 1) brake = 255;
else if (tSpeed >= 127) brake = 0;
else brake = 2 * (128-tSpeed);
if (invertBrake)
brake=255-brake;
{ // new block because of variable f
#if defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_STM32)
{
int f = 131;
#ifdef VARIABLE_TONES
if (tSpeed > 2) {
@ -376,18 +350,13 @@ void MotorDriver::setDCSignal(byte speedcode) {
}
#endif
DCCTimer::DCCEXanalogWriteFrequency(brakePin, f); // set DC PWM frequency to 100Hz XXX May move to setup
}
#endif
if (tSpeed <= 1) brake = 255;
else if (tSpeed >= 127) brake = 0;
else brake = 2 * (128-tSpeed);
if (invertBrake)
brake=255-brake;
#if defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_STM32)
DCCTimer::DCCEXanalogWrite(brakePin,brake);
#else
#else // all AVR here
DCCTimer::DCCEXanalogWriteFrequency(brakePin, 0); // 0 is lowest possible f, like 120Hz
analogWrite(brakePin,brake);
#endif
}
//DIAG(F("DCSignal %d"), speedcode);
if (HAVE_PORTA(fastSignalPin.shadowinout == &PORTA)) {
noInterrupts();
@ -455,39 +424,7 @@ void MotorDriver::throttleInrush(bool on) {
}
#else
if(on){
switch(brakePin) {
#if defined(ARDUINO_AVR_UNO)
// Not worth doin something here as:
// If we are on pin 9 or 10 we are on Timer1 and we can not touch Timer1 as that is our DCC source.
// If we are on pin 5 or 6 we are on Timer 0 ad we can not touch Timer0 as that is millis() etc.
// We are most likely not on pin 3 or 11 as no known motor shield has that as brake.
#endif
#if defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560)
case 9:
case 10:
// Timer2 (is different)
TCCR2A = (TCCR2A & B11111100) | B00000011; // set WGM0=1 and WGM1=1 for fast PWM
TCCR2B = (TCCR2B & B11110000) | B00000001; // set WGM2=0 and prescaler div=1 (max)
DIAG(F("2 A=%x B=%x"), TCCR2A, TCCR2B);
break;
case 6:
case 7:
case 8:
// Timer4
TCCR4A = (TCCR4A & B11111100) | B00000001; // set WGM0=1 and WGM1=0 for fast PWM 8-bit
TCCR4B = (TCCR4B & B11100000) | B00001001; // set WGM2=1 and WGM3=0 for fast PWM 8 bit and div=1 (max)
break;
case 46:
case 45:
case 44:
// Timer5
TCCR5A = (TCCR5A & B11111100) | B00000001; // set WGM0=1 and WGM1=0 for fast PWM 8-bit
TCCR5B = (TCCR5B & B11100000) | B00001001; // set WGM2=1 and WGM3=0 for fast PWM 8 bit and div=1 (max)
break;
#endif
default:
break;
}
DCCTimer::DCCEXanalogWriteFrequency(brakePin, 3);
}
analogWrite(brakePin,duty);
#endif