diff options
Diffstat (limited to 'tests/awd-timer-dma/awd-timer-dma.c')
| -rw-r--r-- | tests/awd-timer-dma/awd-timer-dma.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/tests/awd-timer-dma/awd-timer-dma.c b/tests/awd-timer-dma/awd-timer-dma.c deleted file mode 100644 index ffb16db..0000000 --- a/tests/awd-timer-dma/awd-timer-dma.c +++ /dev/null @@ -1,219 +0,0 @@ -/** - * Testing AWD interrupt, with timer triggered dma - */ - -#include <stdio.h> -#include <stdint.h> -#include <libopencm3/cm3/nvic.h> -#include <libopencm3/stm32/adc.h> -#include <libopencm3/stm32/dma.h> -#include <libopencm3/stm32/gpio.h> -#include <libopencm3/stm32/rcc.h> -#include <libopencm3/stm32/timer.h> - -#include "awd-timer-dma.h" - -/* Everyone has tim6 right? */ -#define TIMER TIM6 -#define TIMER_RCC RCC_TIM6 - -/* what external channel should be included? (Connect a pot here) */ -#define EXT_CHAN_RCC RCC_GPIOA -#define EXT_CHAN_PORT GPIOA -#define EXT_CHAN_PIN GPIO5 -#define EXT_CHAN_CHAN 5 - -// TODO - stick this in libopencm3? -#define ARRAY_SIZE(a) (sizeof((a)) / sizeof((a)[0])) - -// Still have some bad shit to deal with... -#if defined(STM32F0) -#define SEPARATE_ADC_SAMPLING 0 -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_239DOT5 // 4usec or more for tempsensor -#define HAS_CALIBRATION 1 -#elif defined(STM32F1) -#define SEPARATE_ADC_SAMPLING 0 -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_28DOT5CYC // 17usecs or more. >~15cycles at 9Mhz -#define SEPARATE_VREF 0 -#define HAS_CALIBRATION 1 -#define HAS_ROM_CALIBRATION 0 -#elif defined(STM32F3) -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_181DOT5CYC -#define SAMPLE_TIME_TEMP ADC_SMPR_SMP_601DOT5CYC // 2.2usecs or more -#define SAMPLE_TIME_VREF SAMPLE_TIME_TEMP -#define HAS_CALIBRATION 1 -#elif defined(STM32F4) -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_28CYC -#define SAMPLE_TIME_TEMP ADC_SMPR_SMP_144CYC // 10 usecs or more, in theory needs 840cycles! -#define SAMPLE_TIME_VREF SAMPLE_TIME_TEMP -#define ADC_CHANNEL_TEMP ADC_CHANNEL_TEMP_F40 -#define SEPARATE_VREF 0 -#elif defined(STM32L1) -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_48CYC -#define SAMPLE_TIME_TEMP ADC_SMPR_SMP_192CYC -#define SAMPLE_TIME_VREF SAMPLE_TIME_TEMP -#define SEPARATE_VREF 0 -#elif defined(STM32L4) -#define SAMPLE_TIME_BASIC ADC_SMPR_SMP_247DOT5CYC -#define SAMPLE_TIME_TEMP ADC_SMPR_SMP_247DOT5CYC -#define SAMPLE_TIME_VREF SAMPLE_TIME_TEMP -#define HAS_CALIBRATION 1 -#else -#error "no sample time for your target yet?!" -#endif - -#ifndef SEPARATE_VREF -#define SEPARATE_VREF 1 -#endif -#ifndef SEPARATE_ADC_SAMPLING -#define SEPARATE_ADC_SAMPLING 1 -#endif -#ifndef HAS_CALIBRATION -#define HAS_CALIBRATION 0 -#endif -#ifndef HAS_ROM_CALIBRATION -#define HAS_ROM_CALIBRATION 1 -#endif - -/* dma destination */ -static uint16_t adc_buffer[3]; -static int awd_hits; - -/** - * set up a timer from a 100khz timer base. - * @param sample_rate minimum is ~2hz, max is just under 100khz - */ -static void timer_trigger_setup(int sample_rate) -{ - uint32_t timer = TIMER; - - timer_disable_counter(timer); - TIM_CNT(timer) = 0; - /* 100kHz base */ - timer_set_prescaler(timer, (rcc_apb1_frequency / (100*1000)) -1); - timer_set_period(timer, ((100*1000)/sample_rate) - 1); - timer_set_master_mode(timer, TIM_CR2_MMS_UPDATE); -} - -void adc1_isr(void) { - if (ADC_SR(ADC1) & ADC_SR_AWD) { - ADC_SR(ADC1) &= ~ADC_SR_AWD; - awd_hits++; - } -} - - -void task_init(void) -{ - /* Some basic ADC config, that we won't touch again */ -#if defined(STM32F3) - /* silly f303 */ - rcc_periph_clock_enable(RCC_ADC12); - rcc_adc_prescale(RCC_CFGR2_ADCxPRES_PLL_CLK_DIV_1, RCC_CFGR2_ADCxPRES_PLL_CLK_DIV_1); - adc_enable_regulator(ADC1); -#elif defined (STM32L4) - /* same same but different */ - rcc_periph_clock_enable(RCC_ADC1); - ADC_CR(ADC1) &= ~ADC_CR_DEEPPWD; - RCC_CCIPR |= 3 << 28; // system clock as adc clock. (with CKMODE == 0) - adc_enable_regulator(ADC1); - - ADC_CR(ADC1) &= ~ADC_CR_ADCALDIF; - ADC_CR(ADC1) |= ADC_CR_ADCAL; - while (ADC_CR(ADC1) & ADC_CR_ADCAL); - - -#else - rcc_periph_clock_enable(RCC_ADC1); - rcc_periph_clock_enable(RCC_DMA1); - rcc_periph_clock_enable(RCC_TIM6); - rcc_periph_clock_enable(EXT_CHAN_RCC); - gpio_mode_setup(EXT_CHAN_PORT, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, EXT_CHAN_PIN); - adc_power_off(ADC1); - - -#endif -#if (SEPARATE_ADC_SAMPLING == 1) - adc_set_sample_time_on_all_channels(ADC1, SAMPLE_TIME_BASIC); - adc_set_sample_time(ADC1, ADC_CHANNEL_TEMP, SAMPLE_TIME_TEMP); - adc_set_sample_time(ADC1, ADC_CHANNEL_VREF, SAMPLE_TIME_VREF); -#else - adc_set_sample_time_on_all_channels(ADC1, SAMPLE_TIME_BASIC); -#endif - adc_enable_temperature_sensor(); -#if (SEPARATE_VREF == 1) - adc_enable_vrefint(); -#endif - - adc_enable_scan_mode(ADC1); - uint8_t channel_array[] = {EXT_CHAN_CHAN, ADC_CHANNEL_TEMP, ADC_CHANNEL_VREF}; - adc_set_regular_sequence(ADC1, ARRAY_SIZE(channel_array), channel_array); - - adc_enable_external_trigger_regular(ADC1, ADC_CR2_EXTSEL_TIM6_TRGO, ADC_CR2_EXTEN_RISING_EDGE); - /* power down when not in use please. */ - ADC_CR1(ADC1) |= ADC_CR1_PDD | ADC_CR1_PDI; - adc_power_on(ADC1); - -#if 1 - /* adc-v2 has this as "adc_is_power_on*/ - while ((ADC_SR(ADC1) & ADC_SR_ADONS) == 0) { - ; - } -#endif - - /* hard code a threshold for now , around a third */ - adc_set_watchdog_low_threshold(ADC1, 1400); - adc_enable_analog_watchdog_on_selected_channel(ADC1, EXT_CHAN_CHAN); - adc_enable_analog_watchdog_regular(ADC1); - adc_enable_awd_interrupt(ADC1); - nvic_enable_irq(NVIC_ADC1_IRQ); - - dma_channel_reset(DMA1, DMA_CHANNEL1); // channel1 is adc - dma_set_memory_address(DMA1, DMA_CHANNEL1, (uint32_t)adc_buffer); - dma_set_memory_size(DMA1, DMA_CHANNEL1, DMA_CCR_MSIZE_16BIT); - dma_enable_memory_increment_mode(DMA1, DMA_CHANNEL1); - dma_set_peripheral_address(DMA1, DMA_CHANNEL1, (uint32_t) & ADC_DR(ADC1)); - dma_set_peripheral_size(DMA1, DMA_CHANNEL1, DMA_CCR_PSIZE_16BIT); - dma_set_number_of_data(DMA1, DMA_CHANNEL1, ARRAY_SIZE(adc_buffer)); - -// dma_enable_transfer_complete_interrupt(DMA1, DMA_CHANNEL1); - dma_enable_transfer_error_interrupt(DMA1, DMA_CHANNEL1); - dma_set_read_from_peripheral(DMA1, DMA_CHANNEL1); - - // This is essential to stop overflows. - dma_enable_circular_mode(DMA1, DMA_CHANNEL1); - - dma_enable_channel(DMA1, DMA_CHANNEL1); - nvic_enable_irq(NVIC_DMA1_CHANNEL1_IRQ); - - //Keep on requesting DMA, as long as ADC is running - ADC_CR2(ADC1) |= ADC_CR2_DDS; - adc_enable_dma(ADC1); - - timer_trigger_setup(100); // slowly for now... - /* Reset timer count and start */ - TIM_CNT(TIM6) = 0; - timer_enable_counter(TIM6); - -} - -static float adc_calc_tempf(unsigned int adc_raw_temp) { -#if (HAS_ROM_CALIBRATION == 1) - float slope = ((110-30) * 1.0f)/((ST_TSENSE_CAL2_110C - ST_TSENSE_CAL1_30C) * 1.0f); - return slope * (adc_raw_temp - ST_TSENSE_CAL1_30C) + 30; -#else - return ts_v * 1.0; -#endif -} - -void task_run(void) -{ - static int last_awd_hits; - float temperature = adc_calc_tempf(adc_buffer[1]); - printf("Last adc reading: %d, last temp: %f (raw=%d), last cal: %d\n", - adc_buffer[0], temperature, adc_buffer[1], adc_buffer[2]); - if (awd_hits > last_awd_hits) { - printf("Got %d AWD hits since last run\n", awd_hits); - last_awd_hits = awd_hits; - } -} |