kopia lustrzana https://github.com/mobilinkd/tnc3-firmware
53 wiersze
1.3 KiB
C++
53 wiersze
1.3 KiB
C++
// Copyright 2020 Rob Riggs <rob@mobilinkd.com>
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// All rights reserved.
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#include "Demodulator.hpp"
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namespace mobilinkd { namespace tnc {
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/**
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* Start the ADC DMA transfer. The block size is equal to the number of
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* 32-bit elements in the buffer. This is also equal to the number of
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* 16-bit elements in each DMA "half complete" transfer. Each DMA transfer
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* results in block_size * 2 bytes being transferred.
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*
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* We must bear in mind that the DMA buffer size is expressed in DWORDs,
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* the DMA transfer size is expressed in WORDs, and the memory copy operation
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* in BYTEs.
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*
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* @param period
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* @param block_size
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*/
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void IDemodulator::startADC(uint32_t period, uint32_t block_size)
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{
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audio::set_adc_block_size(block_size);
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htim6.Init.Period = period;
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if (HAL_TIM_Base_Init(&htim6) != HAL_OK)
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{
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CxxErrorHandler();
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}
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if (HAL_TIM_Base_Start(&htim6) != HAL_OK)
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{
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CxxErrorHandler();
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}
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if (HAL_ADC_Start_DMA(&hadc1, audio::adc_buffer,
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audio::dma_transfer_size) != HAL_OK)
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{
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CxxErrorHandler();
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}
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}
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void IDemodulator::stopADC()
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{
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if (HAL_ADC_Stop_DMA(&hadc1) != HAL_OK)
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CxxErrorHandler();
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if (HAL_TIM_Base_Stop(&htim6) != HAL_OK)
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CxxErrorHandler();
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}
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}} // mobilinkd::tnc
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