I'm trying to run the STM32F0XX-ADC example on a bare STM32F051K8 microcontroller.
Although it compiles and runs on the hardware, it seems to not do any conversions.
Configuration:
* ChibiStudio 20
* ChibiOS 18.2
* Started with start_gcc70.bat
* Connected to ST-Link/V2
Description of symptoms:
I compile the program, and flash it to the device using the ST-Link. The program runs OK, I can set breakpoints in the main loop and have the program stop there. Because the device is an QFN32, I changed board.h to sample on PORTA pin 1. However, I do not see changing values in [monospace]samples2[/monospace] .
To be sure whether the ADC was running I put a breakpoint on lines 35 and 46, in the callbacks of the ADC. These are never reached.
Am I missing a vital part of configuration (clock assignment, ...)?
I've looked at this code and the ADC Kickstart example, but can't figure out why the values aren't updating. Any ideas would be appreciated.
main.cpp:
Code: Select all
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "ch.h"
#include "hal.h"
#define ADC_GRP1_NUM_CHANNELS 1
#define ADC_GRP1_BUF_DEPTH 8
#define ADC_GRP2_NUM_CHANNELS 4
#define ADC_GRP2_BUF_DEPTH 16
static adcsample_t samples1[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
static adcsample_t samples2[ADC_GRP2_NUM_CHANNELS * ADC_GRP2_BUF_DEPTH];
/*
* ADC streaming callback.
*/
size_t nx = 0, ny = 0;
static void adccallback(ADCDriver *adcp, adcsample_t *buffer, size_t n) {
(void)adcp;
if (samples2 == buffer) {
nx += n;
}
else {
ny += n;
}
}
static void adcerrorcallback(ADCDriver *adcp, adcerror_t err) {
(void)adcp;
(void)err;
}
/*
* ADC conversion group.
* Mode: Linear buffer, 8 samples of 1 channel, SW triggered.
* Channels: IN10.
*/
static const ADCConversionGroup adcgrpcfg1 = {
FALSE,
ADC_GRP1_NUM_CHANNELS,
NULL,
adcerrorcallback,
ADC_CFGR1_CONT | ADC_CFGR1_RES_12BIT, /* CFGR1 */
ADC_TR(0, 0), /* TR */
ADC_SMPR_SMP_1P5, /* SMPR */
ADC_CHSELR_CHSEL10 /* CHSELR */
};
/*
* ADC conversion group.
* Mode: Continuous, 16 samples of 8 channels, SW triggered.
* Channels: IN10, IN11, Sensor, VRef.
*/
static const ADCConversionGroup adcgrpcfg2 = {
TRUE,
ADC_GRP2_NUM_CHANNELS,
adccallback,
adcerrorcallback,
ADC_CFGR1_CONT | ADC_CFGR1_RES_12BIT, /* CFGR1 */
ADC_TR(0, 0), /* TR */
ADC_SMPR_SMP_28P5, /* SMPR */
ADC_CHSELR_CHSEL10 | ADC_CHSELR_CHSEL11 |
ADC_CHSELR_CHSEL16 | ADC_CHSELR_CHSEL17 /* CHSELR */
};
/*
* Red LEDs blinker thread, times are in milliseconds.
*/
static THD_WORKING_AREA(waThread1, 128);
static THD_FUNCTION(Thread1, arg) {
(void)arg;
chRegSetThreadName("blinker");
while (true) {
palSetPad(GPIOC, GPIOC_LED4);
chThdSleepMilliseconds(500);
palClearPad(GPIOC, GPIOC_LED4);
chThdSleepMilliseconds(500);
}
}
/*
* Application entry point.
*/
int main(void) {
/*
* System initializations.
* - HAL initialization, this also initializes the configured device drivers
* and performs the board-specific initializations.
* - Kernel initialization, the main() function becomes a thread and the
* RTOS is active.
*/
halInit();
chSysInit();
/*
* Setting up analog inputs used by the demo.
*/
palSetGroupMode(GPIOC, PAL_PORT_BIT(0) | PAL_PORT_BIT(1),
0, PAL_MODE_INPUT_ANALOG);
/*
* Creates the blinker thread.
*/
chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
/*
* Activates the ADC1 driver and the temperature sensor.
*/
adcStart(&ADCD1, NULL);
adcSTM32SetCCR(ADC_CCR_VBATEN | ADC_CCR_TSEN | ADC_CCR_VREFEN);
/*
* Linear conversion.
*/
adcConvert(&ADCD1, &adcgrpcfg1, samples1, ADC_GRP1_BUF_DEPTH);
chThdSleepMilliseconds(1000);
/*
* Starts an ADC continuous conversion.
*/
adcStartConversion(&ADCD1, &adcgrpcfg2, samples2, ADC_GRP2_BUF_DEPTH);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (true) {
if (palReadPad(GPIOA, GPIOA_BUTTON)) {
adcStopConversion(&ADCD1);
adcSTM32SetCCR(0);
}
chThdSleepMilliseconds(500);
}
}
