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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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.
ChibiOS/RT 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ch.h"
#include "hal.h"
#define ADC_GRP1_NUM_CHANNELS 8
#define ADC_GRP1_BUF_DEPTH 16
/*
* ADC configuration, empty for STM32, nothing to configure.
*/
static const ADCConfig adccfg = {};
static adcsample_t samples[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_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 (samples == buffer) {
nx += n;
}
else {
ny += n;
}
}
/*
* ADC conversion group.
* Mode: Streaming, continuous, 16 samples of 8 channels, SW triggered.
* Channels: IN10, IN11, IN10, IN11, IN10, IN11, Sensor, VRef.
*/
static const ADCConversionGroup adcgrpcfg = {
TRUE,
ADC_GRP1_NUM_CHANNELS,
adccallback,
0,
ADC_CR2_TSVREFE | ADC_CR2_CONT,
0,
0,
ADC_SQR1_NUM_CH(ADC_GRP1_NUM_CHANNELS),
ADC_SQR2_SQ7_N(ADC_CHANNEL_SENSOR) | ADC_SQR2_SQ6_N(ADC_CHANNEL_VREFINT),
ADC_SQR3_SQ5_N(ADC_CHANNEL_IN11) | ADC_SQR3_SQ4_N(ADC_CHANNEL_IN10) |
ADC_SQR3_SQ3_N(ADC_CHANNEL_IN11) | ADC_SQR3_SQ2_N(ADC_CHANNEL_IN10) |
ADC_SQR3_SQ1_N(ADC_CHANNEL_IN11) | ADC_SQR3_SQ0_N(ADC_CHANNEL_IN10)
};
/*
* Red LEDs blinker thread, times are in milliseconds.
*/
static WORKING_AREA(waThread1, 128);
static msg_t Thread1(void *arg) {
(void)arg;
while (TRUE) {
palClearPad(IOPORT3, GPIOC_LED);
chThdSleepMilliseconds(500);
palSetPad(IOPORT3, GPIOC_LED);
chThdSleepMilliseconds(500);
}
return 0;
}
/*
* Entry point, note, the main() function is already a thread in the system
* on entry.
*/
int main(int argc, char **argv) {
(void)argc;
(void)argv;
/*
* Setting up analog inputs used by the demo.
*/
palSetGroupMode(GPIOC, PAL_PORT_BIT(0) | PAL_PORT_BIT(1),
PAL_MODE_INPUT_ANALOG);
/*
* Creates the blinker thread.
*/
chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
/*
* Starts an ADC continuous conversion.
*/
adcStart(&ADCD1, &adccfg);
adcStartConversion(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (TRUE) {
if (palReadPad(GPIOA, GPIOA_BUTTON))
adcStopConversion(&ADCD1);
chThdSleepMilliseconds(500);
}
return 0;
}
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