mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-23 21:01:25 +01:00
STM32 ADCee extended to support ADC2 and ADC3
This commit is contained in:
pmantoine
parent
7a305e179c
commit
550ad58c4d
@ -125,8 +125,13 @@ private:
|
||||
// On platforms that scan, it is called from waveform ISR
|
||||
// only on a regular basis.
|
||||
static void scan();
|
||||
#if defined (ARDUINO_ARCH_STM32)
|
||||
// bit array of used pins (max 32)
|
||||
static uint32_t usedpins;
|
||||
#else
|
||||
// bit array of used pins (max 16)
|
||||
static uint16_t usedpins;
|
||||
#endif
|
||||
static uint8_t highestPin;
|
||||
// cached analog values (malloc:ed to actual number of ADC channels)
|
||||
static int *analogvals;
|
||||
|
||||
@ -52,7 +52,7 @@ HardwareSerial Serial6(PA12, PA11); // Rx=PA12, Tx=PA11 -- CN10 pins 12 and 14
|
||||
HardwareSerial Serial3(PC11, PC10); // Rx=PC11, Tx=PC10 -- USART3 - F446RE
|
||||
HardwareSerial Serial5(PD2, PC12); // Rx=PC7, Tx=PC6 -- UART5 - F446RE
|
||||
// On the F446RE, Serial4 and Serial6 also use pins we can't readily map while using the Arduino pins
|
||||
#elif defined(ARDUINO_NUCLEO_F413ZH) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)|| defined(ARDUINO_NUCLEO_F412ZG)
|
||||
#elif defined(ARDUINO_NUCLEO_F412ZG) || defined(ARDUINO_NUCLEO_F413ZH) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)
|
||||
// Nucleo-144 boards don't have Serial1 defined by default
|
||||
HardwareSerial Serial6(PG9, PG14); // Rx=PG9, Tx=PG14 -- USART6
|
||||
// Serial3 is defined to use USART3 by default, but is in fact used as the diag console
|
||||
@ -235,22 +235,19 @@ void DCCTimer::reset() {
|
||||
while(true) {};
|
||||
}
|
||||
|
||||
// TODO: may need to use uint32_t on STMF4xx variants with > 16 analog inputs!
|
||||
#if defined(ARDUINO_NUCLEO_F446RE) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)
|
||||
#warning STM32 board selected not fully supported - only use ADC1 inputs 0-15 for current sensing!
|
||||
#endif
|
||||
// For now, define the max of 16 ports - some variants have more, but this not **yet** supported
|
||||
#define NUM_ADC_INPUTS 16
|
||||
// #define NUM_ADC_INPUTS NUM_ANALOG_INPUTS
|
||||
// Now we can handle more ADCs, maybe this works!
|
||||
#define NUM_ADC_INPUTS NUM_ANALOG_INPUTS
|
||||
|
||||
uint16_t ADCee::usedpins = 0;
|
||||
uint8_t ADCee::highestPin = 0;
|
||||
int * ADCee::analogvals = NULL;
|
||||
uint32_t * analogchans = NULL;
|
||||
bool adc1configured = false;
|
||||
uint32_t ADCee::usedpins = 0; // Max of 32 ADC input channels!
|
||||
uint8_t ADCee::highestPin = 0; // Highest pin to scan
|
||||
int * ADCee::analogvals = NULL; // Array of analog values last captured
|
||||
uint32_t * analogchans = NULL; // Array of channel numbers to be scanned
|
||||
// bool adc1configured = false;
|
||||
ADC_TypeDef * * adcchans = NULL; // Array to capture which ADC is each input channel on
|
||||
|
||||
int16_t ADCee::ADCmax() {
|
||||
return 4095;
|
||||
int16_t ADCee::ADCmax()
|
||||
{
|
||||
return 4095;
|
||||
}
|
||||
|
||||
int ADCee::init(uint8_t pin) {
|
||||
@ -261,11 +258,33 @@ int ADCee::init(uint8_t pin) {
|
||||
return -1024; // some silly value as error
|
||||
|
||||
uint32_t stmgpio = STM_PORT(stmpin); // converts to the GPIO port (16-bits per port group on STM32)
|
||||
uint32_t adcchan = STM_PIN_CHANNEL(pinmap_function(stmpin, PinMap_ADC)); // find ADC channel (only valid for ADC1!)
|
||||
GPIO_TypeDef * gpioBase;
|
||||
uint32_t adcchan = STM_PIN_CHANNEL(pinmap_function(stmpin, PinMap_ADC)); // find ADC input channel
|
||||
ADC_TypeDef *adc = (ADC_TypeDef *)pinmap_find_peripheral(stmpin, PinMap_ADC); // find which ADC this pin is on ADC1/2/3 etc.
|
||||
int adcnum = 1;
|
||||
if (adc == ADC1)
|
||||
DIAG(F("ADCee::init(): found pin %d on ADC1"), pin);
|
||||
// Checking for ADC2 and ADC3 being defined helps cater for more variants later
|
||||
#if defined(ADC2)
|
||||
else if (adc == ADC2)
|
||||
{
|
||||
DIAG(F("ADCee::init(): found pin %d on ADC2"), pin);
|
||||
adcnum = 2;
|
||||
}
|
||||
#endif
|
||||
#if defined(ADC3)
|
||||
else if (adc == ADC3)
|
||||
{
|
||||
DIAG(F("ADCee::init(): found pin %d on ADC3"), pin);
|
||||
adcnum = 3;
|
||||
}
|
||||
#endif
|
||||
else DIAG(F("ADCee::init(): found pin %d on unknown ADC!"), pin);
|
||||
|
||||
// Port config - find which port we're on and power it up
|
||||
switch(stmgpio) {
|
||||
// Port config - find which port we're on and power it up
|
||||
GPIO_TypeDef *gpioBase;
|
||||
|
||||
switch (stmgpio)
|
||||
{
|
||||
case 0x00:
|
||||
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN; //Power up PORTA
|
||||
gpioBase = GPIOA;
|
||||
@ -278,6 +297,20 @@ int ADCee::init(uint8_t pin) {
|
||||
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN; //Power up PORTC
|
||||
gpioBase = GPIOC;
|
||||
break;
|
||||
case 0x03:
|
||||
RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN; //Power up PORTD
|
||||
gpioBase = GPIOD;
|
||||
break;
|
||||
case 0x04:
|
||||
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOEEN; //Power up PORTE
|
||||
gpioBase = GPIOE;
|
||||
break;
|
||||
#if defined(GPIOF)
|
||||
case 0x05:
|
||||
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOFEN; //Power up PORTF
|
||||
gpioBase = GPIOF;
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
return -1023; // some silly value as error
|
||||
}
|
||||
@ -293,31 +326,33 @@ int ADCee::init(uint8_t pin) {
|
||||
if (adcchan > 18)
|
||||
return -1022; // silly value as error
|
||||
if (adcchan < 10)
|
||||
ADC1->SMPR2 |= (0b111 << (adcchan * 3)); // Channel sampling rate 480 cycles
|
||||
adc->SMPR2 |= (0b111 << (adcchan * 3)); // Channel sampling rate 480 cycles
|
||||
else
|
||||
ADC1->SMPR1 |= (0b111 << ((adcchan - 10) * 3)); // Channel sampling rate 480 cycles
|
||||
adc->SMPR1 |= (0b111 << ((adcchan - 10) * 3)); // Channel sampling rate 480 cycles
|
||||
|
||||
// Read the inital ADC value for this analog input
|
||||
ADC1->SQR3 = adcchan; // 1st conversion in regular sequence
|
||||
ADC1->CR2 |= (1 << 30); // Start 1st conversion SWSTART
|
||||
while(!(ADC1->SR & (1 << 1))); // Wait until conversion is complete
|
||||
value = ADC1->DR; // Read value from register
|
||||
adc->SQR3 = adcchan; // 1st conversion in regular sequence
|
||||
adc->CR2 |= ADC_CR2_SWSTART; //(1 << 30); // Start 1st conversion SWSTART
|
||||
while(!(adc->SR & (1 << 1))); // Wait until conversion is complete
|
||||
value = adc->DR; // Read value from register
|
||||
|
||||
uint8_t id = pin - PNUM_ANALOG_BASE;
|
||||
if (id > 15) { // today we have not enough bits in the mask to support more
|
||||
return -1021;
|
||||
}
|
||||
// if (id > 15) { // today we have not enough bits in the mask to support more
|
||||
// return -1021;
|
||||
// }
|
||||
|
||||
if (analogvals == NULL) { // allocate analogvals and analogchans if this is the first invocation of init.
|
||||
if (analogvals == NULL) { // allocate analogvals, analogchans and adcchans if this is the first invocation of init
|
||||
analogvals = (int *)calloc(NUM_ADC_INPUTS+1, sizeof(int));
|
||||
analogchans = (uint32_t *)calloc(NUM_ADC_INPUTS+1, sizeof(uint32_t));
|
||||
adcchans = (ADC_TypeDef **)calloc(NUM_ADC_INPUTS+1, sizeof(ADC_TypeDef));
|
||||
}
|
||||
analogvals[id] = value; // Store sampled value
|
||||
analogchans[id] = adcchan; // Keep track of which ADC channel is used for reading this pin
|
||||
usedpins |= (1 << id); // This pin is now ready
|
||||
adcchans[id] = adc; // Keep track of which ADC this channel is on
|
||||
usedpins |= (1 << id); // This pin is now ready
|
||||
if (id > highestPin) highestPin = id; // Store our highest pin in use
|
||||
|
||||
DIAG(F("ADCee::init(): value=%d, channel=%d, id=%d"), value, adcchan, id);
|
||||
DIAG(F("ADCee::init(): value=%d, ADC%d: channel=%d, id=%d"), value, adcnum, adcchan, id);
|
||||
|
||||
return value;
|
||||
}
|
||||
@ -344,13 +379,16 @@ void ADCee::scan() {
|
||||
static uint8_t id = 0; // id and mask are the same thing but it is faster to
|
||||
static uint16_t mask = 1; // increment and shift instead to calculate mask from id
|
||||
static bool waiting = false;
|
||||
static ADC_TypeDef *adc;
|
||||
|
||||
if (waiting) {
|
||||
adc = adcchans[id];
|
||||
if (waiting)
|
||||
{
|
||||
// look if we have a result
|
||||
if (!(ADC1->SR & (1 << 1)))
|
||||
if (!(adc->SR & (1 << 1)))
|
||||
return; // no result, continue to wait
|
||||
// found value
|
||||
analogvals[id] = ADC1->DR;
|
||||
analogvals[id] = adc->DR;
|
||||
// advance at least one track
|
||||
#ifdef DEBUG_ADC
|
||||
if (id == 1) TrackManager::track[1]->setBrake(0);
|
||||
@ -369,9 +407,10 @@ void ADCee::scan() {
|
||||
// look for a valid track to sample or until we are around
|
||||
while (true) {
|
||||
if (mask & usedpins) {
|
||||
// start new ADC aquire on id
|
||||
ADC1->SQR3 = analogchans[id]; //1st conversion in regular sequence
|
||||
ADC1->CR2 |= (1 << 30); //Start 1st conversion SWSTART
|
||||
// start new ADC aquire on id
|
||||
adc = adcchans[id];
|
||||
adc->SQR3 = analogchans[id]; // 1st conversion in regular sequence
|
||||
adc->CR2 |= (1 << 30); // Start 1st conversion SWSTART
|
||||
#ifdef DEBUG_ADC
|
||||
if (id == 1) TrackManager::track[1]->setBrake(1);
|
||||
#endif
|
||||
@ -392,19 +431,83 @@ void ADCee::scan() {
|
||||
void ADCee::begin() {
|
||||
noInterrupts();
|
||||
//ADC1 config sequence
|
||||
// TODO: currently defaults to ADC1, may need more to handle other members of STM32F4xx family
|
||||
RCC->APB2ENR |= (1 << 8); //Enable ADC1 clock (Bit8)
|
||||
RCC->APB2ENR |= RCC_APB2ENR_ADC1EN; // Enable ADC1 clock
|
||||
// Set ADC prescaler - DIV8 ~ 40ms, DIV6 ~ 30ms, DIV4 ~ 20ms, DIV2 ~ 11ms
|
||||
ADC->CCR = (0 << 16); // Set prescaler 0=DIV2, 1=DIV4, 2=DIV6, 3=DIV8
|
||||
ADC1->CR1 &= ~(1 << 8); //SCAN mode disabled (Bit8)
|
||||
ADC1->CR1 &= ~(3 << 24); //12bit resolution (Bit24,25 0b00)
|
||||
ADC1->SQR1 = (1 << 20); //Set number of conversions projected (L[3:0] 0b0001) -> 1 conversion
|
||||
// Disable the DMA controller for ADC1
|
||||
ADC1->CR2 &= ~ADC_CR2_DMA;
|
||||
ADC1->CR2 &= ~(1 << 1); //Single conversion
|
||||
ADC1->CR2 &= ~(1 << 11); //Right alignment of data bits bit12....bit0
|
||||
ADC1->SQR1 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC1->SQR2 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC1->SQR3 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC1->CR2 |= (1 << 0); // Switch on ADC1
|
||||
// Wait for ADC1 to become ready (calibration complete)
|
||||
while (!(ADC1->CR2 & ADC_CR2_ADON)) {
|
||||
}
|
||||
#if defined(ADC2)
|
||||
// Enable the ADC2 clock
|
||||
RCC->APB2ENR |= RCC_APB2ENR_ADC2EN;
|
||||
|
||||
// Initialize ADC2
|
||||
ADC2->CR1 = 0; // Disable all channels
|
||||
ADC2->CR2 = 0; // Clear CR2 register
|
||||
|
||||
ADC2->CR1 &= ~(1 << 8); //SCAN mode disabled (Bit8)
|
||||
ADC2->CR1 &= ~(3 << 24); //12bit resolution (Bit24,25 0b00)
|
||||
ADC2->SQR1 = (1 << 20); //Set number of conversions projected (L[3:0] 0b0001) -> 1 conversion
|
||||
ADC2->CR2 &= ~ADC_CR2_DMA; // Disable the DMA controller for ADC3
|
||||
ADC2->CR2 &= ~(1 << 1); //Single conversion
|
||||
ADC2->CR2 &= ~(1 << 11); //Right alignment of data bits bit12....bit0
|
||||
ADC2->SQR1 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC2->SQR2 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC2->SQR3 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
|
||||
// Enable the ADC
|
||||
ADC2->CR2 |= ADC_CR2_ADON;
|
||||
|
||||
// Wait for ADC2 to become ready (calibration complete)
|
||||
while (!(ADC2->CR2 & ADC_CR2_ADON)) {
|
||||
}
|
||||
|
||||
// Perform ADC3 calibration (optional)
|
||||
// ADC3->CR2 |= ADC_CR2_CAL;
|
||||
// while (ADC3->CR2 & ADC_CR2_CAL) {
|
||||
// }
|
||||
#endif
|
||||
#if defined(ADC3)
|
||||
// Enable the ADC3 clock
|
||||
RCC->APB2ENR |= RCC_APB2ENR_ADC3EN;
|
||||
|
||||
// Initialize ADC3
|
||||
ADC3->CR1 = 0; // Disable all channels
|
||||
ADC3->CR2 = 0; // Clear CR2 register
|
||||
|
||||
ADC3->CR1 &= ~(1 << 8); //SCAN mode disabled (Bit8)
|
||||
ADC3->CR1 &= ~(3 << 24); //12bit resolution (Bit24,25 0b00)
|
||||
ADC3->SQR1 = (1 << 20); //Set number of conversions projected (L[3:0] 0b0001) -> 1 conversion
|
||||
ADC3->CR2 &= ~ADC_CR2_DMA; // Disable the DMA controller for ADC3
|
||||
ADC3->CR2 &= ~(1 << 1); //Single conversion
|
||||
ADC3->CR2 &= ~(1 << 11); //Right alignment of data bits bit12....bit0
|
||||
ADC3->SQR1 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC3->SQR2 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
ADC3->SQR3 &= ~(0x3FFFFFFF); //Clear whole 1st 30bits in register
|
||||
|
||||
// Enable the ADC
|
||||
ADC3->CR2 |= ADC_CR2_ADON;
|
||||
|
||||
// Wait for ADC3 to become ready (calibration complete)
|
||||
while (!(ADC3->CR2 & ADC_CR2_ADON)) {
|
||||
}
|
||||
|
||||
// Perform ADC3 calibration (optional)
|
||||
// ADC3->CR2 |= ADC_CR2_CAL;
|
||||
// while (ADC3->CR2 & ADC_CR2_CAL) {
|
||||
// }
|
||||
#endif
|
||||
interrupts();
|
||||
}
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user