mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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248 lines
7.3 KiB
C
Executable File
248 lines
7.3 KiB
C
Executable File
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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#include "test.h"
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static void pwmpcb(PWMDriver *pwmp);
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static void adccb(ADCDriver *adcp, adcsample_t *buffer, size_t n);
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static void spicb(SPIDriver *spip);
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/* Total number of channels to be sampled by a single ADC operation.*/
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#define ADC_GRP1_NUM_CHANNELS 2
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/* Depth of the conversion buffer, channels are sampled four times each.*/
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#define ADC_GRP1_BUF_DEPTH 4
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/*
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* ADC samples buffer.
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*/
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static adcsample_t samples[ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH];
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/*
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* ADC conversion group.
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* Mode: Linear buffer, 4 samples of 2 channels, SW triggered.
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* Channels: IN10 (48 cycles sample time)
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* Sensor (192 cycles sample time)
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*/
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static const ADCConversionGroup adcgrpcfg = {
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FALSE,
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ADC_GRP1_NUM_CHANNELS,
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adccb,
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NULL,
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/* HW dependent part.*/
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0, /* CR1 */
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ADC_CR2_SWSTART, /* CR2 */
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0,
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ADC_SMPR2_SMP_AN10(ADC_SAMPLE_48) | ADC_SMPR2_SMP_SENSOR(ADC_SAMPLE_192),
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0,
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ADC_SQR1_NUM_CH(ADC_GRP1_NUM_CHANNELS),
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0,
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0,
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0,
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ADC_SQR5_SQ2_N(ADC_CHANNEL_IN10) | ADC_SQR5_SQ1_N(ADC_CHANNEL_SENSOR)
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};
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/*
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* PWM configuration structure.
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* Cyclic callback enabled, channels 1 and 2 enabled without callbacks,
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* the active state is a logic one.
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*/
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static PWMConfig pwmcfg = {
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10000, /* 10kHz PWM clock frequency. */
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10000, /* PWM period 1S (in ticks). */
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pwmpcb,
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{
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{PWM_OUTPUT_ACTIVE_HIGH, NULL},
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{PWM_OUTPUT_ACTIVE_HIGH, NULL},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL}
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},
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/* HW dependent part.*/
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0,
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0
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};
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/*
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* SPI configuration structure.
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* Maximum speed (12MHz), CPHA=0, CPOL=0, 16bits frames, MSb transmitted first.
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* The slave select line is the pin GPIOA_SPI1NSS on the port GPIOA.
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*/
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static const SPIConfig spicfg = {
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spicb,
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/* HW dependent part.*/
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GPIOB,
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12,
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SPI_CR1_DFF
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};
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/*
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* PWM cyclic callback.
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* A new ADC conversion is started.
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*/
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static void pwmpcb(PWMDriver *pwmp) {
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(void)pwmp;
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/* Starts an asynchronous ADC conversion operation, the conversion
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will be executed in parallel to the current PWM cycle and will
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terminate before the next PWM cycle.*/
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chSysLockFromIsr();
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adcStartConversionI(&ADCD1, &adcgrpcfg, samples, ADC_GRP1_BUF_DEPTH);
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chSysUnlockFromIsr();
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}
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/*
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* ADC end conversion callback.
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* The PWM channels are reprogrammed using the latest ADC samples.
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* The latest samples are transmitted into a single SPI transaction.
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*/
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void adccb(ADCDriver *adcp, adcsample_t *buffer, size_t n) {
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(void) buffer; (void) n;
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/* Note, only in the ADC_COMPLETE state because the ADC driver fires an
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intermediate callback when the buffer is half full.*/
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if (adcp->state == ADC_COMPLETE) {
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adcsample_t avg_ch1, avg_ch2;
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/* Calculates the average values from the ADC samples.*/
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avg_ch1 = (samples[0] + samples[2] + samples[4] + samples[6]) / 4;
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avg_ch2 = (samples[1] + samples[3] + samples[5] + samples[7]) / 4;
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chSysLockFromIsr();
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/* Changes the channels pulse width, the change will be effective
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starting from the next cycle.*/
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pwmEnableChannelI(&PWMD4, 0, PWM_FRACTION_TO_WIDTH(&PWMD4, 4096, avg_ch1));
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pwmEnableChannelI(&PWMD4, 1, PWM_FRACTION_TO_WIDTH(&PWMD4, 4096, avg_ch2));
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/* SPI slave selection and transmission start.*/
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spiSelectI(&SPID2);
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spiStartSendI(&SPID2, ADC_GRP1_NUM_CHANNELS * ADC_GRP1_BUF_DEPTH, samples);
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chSysUnlockFromIsr();
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}
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}
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/*
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* SPI end transfer callback.
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*/
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static void spicb(SPIDriver *spip) {
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/* On transfer end just releases the slave select line.*/
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chSysLockFromIsr();
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spiUnselectI(spip);
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chSysUnlockFromIsr();
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}
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/*
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* This is a periodic thread that does absolutely nothing except increasing
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* a seconds counter.
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*/
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static WORKING_AREA(waThread1, 128);
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static msg_t Thread1(void *arg) {
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static uint32_t seconds_counter;
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(void)arg;
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chRegSetThreadName("counter");
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while (TRUE) {
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chThdSleepMilliseconds(1000);
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seconds_counter++;
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}
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}
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/*
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* Application entry point.
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*/
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int main(void) {
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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/*
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* Activates the serial driver 1 using the driver default configuration.
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* PA9 and PA10 are routed to USART1.
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*/
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sdStart(&SD1, NULL);
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palSetPadMode(GPIOA, 9, PAL_MODE_ALTERNATE(7));
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palSetPadMode(GPIOA, 10, PAL_MODE_ALTERNATE(7));
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/*
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* If the user button is pressed after the reset then the test suite is
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* executed immediately before activating the various device drivers in
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* order to not alter the benchmark scores.
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*/
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if (palReadPad(GPIOA, GPIOA_BUTTON))
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TestThread(&SD1);
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/*
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* Initializes the SPI driver 2. The SPI2 signals are routed as follow:
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* PB12 - NSS.
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* PB13 - SCK.
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* PB14 - MISO.
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* PB15 - MOSI.
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*/
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spiStart(&SPID2, &spicfg);
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palSetPad(GPIOB, 12);
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palSetPadMode(GPIOB, 12, PAL_MODE_OUTPUT_PUSHPULL |
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PAL_STM32_OSPEED_HIGHEST); /* NSS. */
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palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(5) |
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PAL_STM32_OSPEED_HIGHEST); /* SCK. */
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palSetPadMode(GPIOB, 14, PAL_MODE_ALTERNATE(5)); /* MISO. */
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palSetPadMode(GPIOB, 15, PAL_MODE_ALTERNATE(5) |
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PAL_STM32_OSPEED_HIGHEST); /* MOSI. */
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/*
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* Initializes the ADC driver 1 and enable the thermal sensor.
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* The pin PC0 on the port GPIOC is programmed as analog input.
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*/
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adcStart(&ADCD1, NULL);
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adcSTM32EnableTSVREFE();
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palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_ANALOG);
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/*
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* Initializes the PWM driver 4, routes the TIM4 outputs to the board LEDs.
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*/
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pwmStart(&PWMD4, &pwmcfg);
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palSetPadMode(GPIOB, GPIOB_LED4, PAL_MODE_ALTERNATE(2));
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palSetPadMode(GPIOB, GPIOB_LED3, PAL_MODE_ALTERNATE(2));
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/*
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* Creates the example thread.
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*/
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
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/*
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* Normal main() thread activity, in this demo it does nothing except
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* sleeping in a loop and check the button state, when the button is
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* pressed the test procedure is launched with output on the serial
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* driver 1.
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*/
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while (TRUE) {
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if (palReadPad(GPIOA, GPIOA_BUTTON))
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TestThread(&SD1);
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chThdSleepMilliseconds(500);
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}
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}
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