4 years, 8 months ago.

The method of maiking two ADC and two DMA program

I could make one adc and one dma program, to study other quetions and answers. But I couldn't understand how to use two ADC and DMA , this question I worried. I want to perform two ADCs and DMAs simultaneously Please help me...

Below is my program

adc.cpp ______________________

1. include "adc.h"

AnalogIn adc(A0); init GPIO stuff

/* HAL objects */ static ADC_HandleTypeDef hadc1; static DMA_HandleTypeDef hdma_adc1;

void adc::init() { ADC_init(); DMA_init();

memset(ADCVal, 0, sizeof(ADCVal)); }

void adc::read(uint16_t *data, uint32_t length) { ADC_ChannelConfTypeDef sConfig;

sConfig.Channel = ADC_CHANNEL_0; チャンネル0(ADC1_IN0:PA0)を使用 sConfig.Rank = 1; sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; sConfig.Offset = 0;

HAL_ADC_ConfigChannel(&hadc1, &sConfig);

HAL_ADC_Start_DMA(&hadc1, (uint32_t *)data, length / 2); while (hdma_adc1.Instance->CR & DMA_SxCR_EN); spin HAL_ADC_Stop(&hadc1); }

void adc::ADC_init() { /* Peripheral clock enable */ ADC1_CLK_ENABLE();

/* Config ADC */ hadc1.Instance = (ADC_TypeDef *)ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4; ADCクロックプリスケーラ4 hadc1.Init.Resolution = ADC_RESOLUTION12b; 分解能12bit hadc1.Init.ScanConvMode = DISABLE; ENABLE:スキャンモード DISABLE:分割スキャンモード hadc1.Init.ContinuousConvMode = ENABLE; ENABLE:連続変換モード DISABLE:シングルモード hadc1.Init.DiscontinuousConvMode = DISABLE; 連続変換モード無効時、このパラメータは無効 hadc1.Init.NbrOfDiscConversion = 0; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; 変換開始の外部トリガなし hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; 変換データを右詰め(RIGHT)か左詰め(LEFT)のどちらかを選択 hadc1.Init.NbrOfConversion = 1; AD変換する合計チャンネル数 hadc1.Init.DMAContinuousRequests = ENABLE; DMAコンテニューリクエスト hadc1.Init.EOCSelection = DISABLE;

/* 設定を反映 */ HAL_ADC_Init(&hadc1); }

void adc::DMA_init() { /* Peripheral clock enable */ DMA2_CLK_ENABLE();

/* Config DMA */ hdma_adc1.Instance = DMA2_Stream0; hdma_adc1.State = HAL_DMA_STATE_READY; HAL_DMA_DeInit(&hdma_adc1);

hdma_adc1.Init.Channel = DMA_CHANNEL_0; hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE; hdma_adc1.Init.MemInc = DMA_MINC_ENABLE; hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD; hdma_adc1.Init.Mode = DMA_NORMAL; hdma_adc1.Init.Priority = DMA_PRIORITY_HIGH; hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE; hdma_adc1.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL; hdma_adc1.Init.MemBurst = DMA_MBURST_SINGLE; hdma_adc1.Init.PeriphBurst = DMA_PBURST_SINGLE;

/* 設定を反映 */ HAL_DMA_Init(&hdma_adc1);

/* 設定されたDMAハンドルをADC_DMAハンドルに関連付ける */ HAL_LINKDMA(&hadc1, DMA_Handle, hdma_adc1); } ___________________

adc.h ___________________

1. ifndef _ADC_H
2. define _ADC_H

1. include <stdint.h>
2. include "mbed.h"

1. define ADC_TIMES 4000

class adc{ private: void ADC_init(); void DMA_init();

public: void init(); void read(uint16_t *data, uint32_t length);

uint16_t ADCVal[ADC_TIMES]; ADC result };

1. endif __________________

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