How to properly activate the analog watchdog
Posted: Sun Apr 16, 2017 12:08 pm
Hello,
I have tried to use the analog watchdog on a STM32F303K8, so it uses the ADCv3 driver.
I have managed to use it by setting the AWD1EN bit of the CFGR register manually.
Either with :
Or with a ChibiOS define:
So it works but I wonder if there is a nicer way to do it without having to manipulate directly the configuration registers?
A simple example application:
Thanks
I have tried to use the analog watchdog on a STM32F303K8, so it uses the ADCv3 driver.
I have managed to use it by setting the AWD1EN bit of the CFGR register manually.
Either with :
Code: Select all
adcStartConversion(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
ADCD1.adcm->CFGR |= ADC_CFGR_AWD1EN;
Or with a ChibiOS define:
Code: Select all
adcStartConversion(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
ADCD1.adcm->CFGR |= ADC_CFGR_AWD1_ALL;
So it works but I wonder if there is a nicer way to do it without having to manipulate directly the configuration registers?
A simple example application:
Code: Select all
#include "ch.h"
#include "hal.h"
#include "chprintf.h"
static BaseSequentialStream* serial = (BaseSequentialStream*)&SD2;
#define ADC_GRP1_NUM_CHANNELS 2
#define ADC_GRP1_BUF_DEPTH 1
static adcsample_t samples[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
static void adccallback(ADCDriver* adcp, adcsample_t* buffer, size_t n)
{
(void)adcp;
(void)buffer;
(void)n;
}
bool watchdogTriggered = false;
static void adcerrorcallback(ADCDriver *adcp, adcerror_t err)
{
if(adcp == &ADCD1 && err == ADC_ERR_AWD1)
{
watchdogTriggered = true;
}
}
static const ADCConversionGroup adcgrpcfg = {
TRUE,
ADC_GRP1_NUM_CHANNELS,
adccallback,
adcerrorcallback,
ADC_CFGR_CONT, /* CFGR */
ADC_TR(0, 3000), /* TR1 */
{
/* SMPR[2] */
0,
ADC_SMPR2_SMP_AN11(ADC_SMPR_SMP_601P5) |
ADC_SMPR2_SMP_AN12(ADC_SMPR_SMP_601P5),
},
{
/* SQR[4] */
ADC_SQR1_SQ1_N(ADC_CHANNEL_IN11) | ADC_SQR1_SQ2_N(ADC_CHANNEL_IN12),
0,
0,
0
}
};
int main(void)
{
halInit();
chSysInit();
// Setting up analog inputs.
palSetGroupMode(
GPIOB, PAL_PORT_BIT(0) | PAL_PORT_BIT(1), 0, PAL_MODE_INPUT_ANALOG);
// Activates the ADC1 driver
adcStart(&ADCD1, NULL);
// Activate Serial Driver
sdStart(&SD2, NULL);
// Starts an ADC continuous conversion.
adcStartConversion(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
// Activate the analog Watchdog
//ADCD1.adcm->CFGR |= ADC_CFGR_AWD1_ALL;
ADCD1.adcm->CFGR |= ADC_CFGR_AWD1EN;
chprintf(serial, "Test program of the analog watchdog.\n");
while(true)
{
chprintf(serial, "IN11 = %u IN12 = %u\n", samples[0], samples[1]);
if(watchdogTriggered)
{
chprintf(serial, "Analog Watchdog Triggered!\n");
// Handle the error...
chThdSleepMilliseconds(500);
// Start the conversion again
watchdogTriggered = false;
adcStartConversion(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
// Activatye the analog watchdog
ADCD1.adcm->CFGR |= ADC_CFGR_AWD1_ALL;
}
chThdSleepMilliseconds(200);
}
}
Thanks
