47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
#include <adc_stm32.hpp>
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void hal::adc_stm32::init() {
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ADC_ChannelConfTypeDef sConfig = {0};
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/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
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*/
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adc_handle_.Instance = ADC1;
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adc_handle_.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
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adc_handle_.Init.Resolution = ADC_RESOLUTION_12B;
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adc_handle_.Init.DataAlign = ADC_DATAALIGN_RIGHT;
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adc_handle_.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
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adc_handle_.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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adc_handle_.Init.LowPowerAutoWait = DISABLE;
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adc_handle_.Init.LowPowerAutoPowerOff = DISABLE;
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adc_handle_.Init.ContinuousConvMode = DISABLE;
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adc_handle_.Init.DiscontinuousConvMode = DISABLE;
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adc_handle_.Init.ExternalTrigConv = ADC_SOFTWARE_START;
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adc_handle_.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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adc_handle_.Init.DMAContinuousRequests = DISABLE;
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adc_handle_.Init.Overrun = ADC_OVR_DATA_PRESERVED;
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if (HAL_ADC_Init(&adc_handle_) != HAL_OK)
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{
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//Error_Handler();
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}
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/** Configure for the selected ADC regular channel to be converted.
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*/
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sConfig.Channel = ADC_CHANNEL_0;
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sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
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sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
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if (HAL_ADC_ConfigChannel(&adc_handle_, &sConfig) != HAL_OK)
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{
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//Error_Handler();
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}
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}
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std::expected<units::voltage, hal::adc::error> hal::adc_stm32::get_reading() {
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HAL_ADC_Start(&adc_handle_);
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if(HAL_ADC_PollForConversion(&adc_handle_, 1000) != HAL_OK) {
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return std::unexpected(hal::adc::error::timeout);
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}
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auto adc_val = HAL_ADC_GetValue(&adc_handle_);
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return ref_voltage_ * adc_val / 4096.f;
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} |