STM32-Player/System/adc/adc.c

//ADC <20><>

#include "sys.h"
#include "tim.h"

#include "adc.h"

//32 <20>ֽڶ<D6BD><DAB6><EFBFBD>
ALIGN_32BYTES(uint16_t __attribute__((section(".RAM_D3"))) ADCxValues[2]);

/**
  * @brief  ADC <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  */
void ADC_Init(void)
{
    ADC_HandleTypeDef AdcHandle = {0};
    DMA_HandleTypeDef DMA_Handle = {0};
    ADC_ChannelConfTypeDef sConfig = {0};
    GPIO_InitTypeDef GPIO_InitStruct;

    //<2F><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
    RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_ADC;
    PeriphClkInitStruct.PLL2.PLL2M = 25;
    PeriphClkInitStruct.PLL2.PLL2N = 504;
    PeriphClkInitStruct.PLL2.PLL2P = 7;
    PeriphClkInitStruct.PLL2.PLL2Q = 7;
    PeriphClkInitStruct.PLL2.PLL2R = 7;
    PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_0;
    PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE;
    PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
    PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_PLL2;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //GPIO
    __HAL_RCC_GPIOC_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    //DMA
    __HAL_RCC_DMA1_CLK_ENABLE();
    DMA_Handle.Instance = DMA1_Stream1;                            //ʹ<>õ<EFBFBD>DMA1 Stream1
    DMA_Handle.Init.Request = DMA_REQUEST_ADC3;                    //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><CDB2><EFBFBD> DMA_REQUEST_ADC3
    DMA_Handle.Init.Direction = DMA_PERIPH_TO_MEMORY;              //<2F><><EFBFBD>䷽<EFBFBD><E4B7BD><EFBFBD>ǴӴ洢<D3B4><E6B4A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    DMA_Handle.Init.PeriphInc = DMA_PINC_DISABLE;                  //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֹ
    DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;                      //<2F>洢<EFBFBD><E6B4A2><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>
    DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD; //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD>λ<EFBFBD><CEBB>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD><D6A3><EFBFBD> 16bit
    DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;    //<2F>洢<EFBFBD><E6B4A2><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD>λ<EFBFBD><CEBB>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD><D6A3><EFBFBD> 16bit
    DMA_Handle.Init.Mode = DMA_CIRCULAR;                           //ѭ<><D1AD>ģʽ
    DMA_Handle.Init.Priority = DMA_PRIORITY_LOW;                   //<2F><><EFBFBD>ȼ<EFBFBD><C8BC><EFBFBD>
    DMA_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;               //<2F><>ֹ FIFO
    DMA_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
    DMA_Handle.Init.MemBurst = DMA_MBURST_SINGLE;
    DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;

    if (HAL_DMA_Init(&DMA_Handle) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //<2F><><EFBFBD><EFBFBD> ADC <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DMA <20><><EFBFBD><EFBFBD>
    __HAL_LINKDMA(&AdcHandle, DMA_Handle, DMA_Handle);

    //<2F><><EFBFBD><EFBFBD> ADC
    __HAL_RCC_ADC3_CLK_ENABLE();
    AdcHandle.Instance = ADC3;
    AdcHandle.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV8;                      //<2F><><EFBFBD><EFBFBD>PLL<4C>첽ʱ<ECB2BD>ӣ<EFBFBD>8<EFBFBD><38>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD> 72MHz / 8 = 36MHz
    AdcHandle.Init.Resolution = ADC_RESOLUTION_16B;                            //16 λ<>ֱ<EFBFBD><D6B1><EFBFBD>
    AdcHandle.Init.ScanConvMode = ADC_SCAN_ENABLE;                             //<2F><><EFBFBD><EFBFBD>ɨ<EFBFBD><C9A8>
    AdcHandle.Init.EOCSelection = ADC_EOC_SINGLE_CONV;                         //EOC ת<><D7AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־
    AdcHandle.Init.LowPowerAutoWait = DISABLE;                                 //<2F><>ֹ<EFBFBD>͹<EFBFBD><CDB9><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6>ӳ<EFBFBD><D3B3><EFBFBD><EFBFBD><EFBFBD>
    AdcHandle.Init.ContinuousConvMode = ENABLE;                                //<2F><><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD>ת<EFBFBD><D7AA>
    AdcHandle.Init.NbrOfConversion = 2;                                        //ʹ<><CAB9><EFBFBD><EFBFBD> 2 <20><>ת<EFBFBD><D7AA>ͨ<EFBFBD><CDA8>
    AdcHandle.Init.DiscontinuousConvMode = DISABLE;                            //<2F><>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
    AdcHandle.Init.NbrOfDiscConversion = 1;                                    //<2F><>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<C4A3>󣬴˲<F3A3ACB4><CBB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD><D4A3><EFBFBD>λ<EFBFBD><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><C3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8><EFBFBD><EFBFBD>
    AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START;                      //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;     //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD><EFBFBD>
    AdcHandle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR; //DMA ѭ<><D1AD>ģʽ<C4A3><CABD><EFBFBD><EFBFBD> ADC ת<><D7AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    AdcHandle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;                         //ADC ת<><D7AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADC <20><><EFBFBD><EFBFBD><EFBFBD>ݼĴ<DDBC><C4B4><EFBFBD>
    AdcHandle.Init.OversamplingMode = DISABLE;                                 //<2F><>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

    //<2F><>ʼ<EFBFBD><CABC> ADC
    if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //У׼ ADC<44><43><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD><C6AB>У׼
    if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //<2F><><EFBFBD><EFBFBD> 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD> PC0 <20><><EFBFBD><EFBFBD>
    sConfig.Channel = ADC_CHANNEL_10;
    sConfig.Rank = ADC_REGULAR_RANK_1;
    sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5; //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    sConfig.SingleDiff = ADC_SINGLE_ENDED;             //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    sConfig.OffsetNumber = ADC_OFFSET_NONE;            //<2F><>ƫ<EFBFBD><C6AB>
    sConfig.Offset = 0;
    sConfig.OffsetRightShift = DISABLE;       //<2F><>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD>
    sConfig.OffsetSignedSaturation = DISABLE; //<2F><>ֹ<EFBFBD>з<EFBFBD><D0B7>ű<EFBFBD><C5B1><EFBFBD>

    if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //<2F><><EFBFBD><EFBFBD> 2<><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD> PC1 <20><><EFBFBD><EFBFBD>
    sConfig.Channel = ADC_CHANNEL_11;
    sConfig.Rank = ADC_REGULAR_RANK_2;
    sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
    sConfig.SingleDiff = ADC_SINGLE_ENDED;
    sConfig.OffsetNumber = ADC_OFFSET_NONE;
    sConfig.Offset = 0;
    sConfig.OffsetRightShift = DISABLE;
    sConfig.OffsetSignedSaturation = DISABLE;

    if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //<2F><><EFBFBD><EFBFBD> ADC <20><> DMA <20><>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>
    if (HAL_ADC_Start_DMA(&AdcHandle, (uint32_t *)ADCxValues, 2) != HAL_OK)
    {
        Error_Handler(__FILE__, __LINE__);
    }

    //<2F><><EFBFBD>ö<EFBFBD>ʱ<EFBFBD><CAB1>
    TIM_Set(TIM3, 1000, 0, 0);
}

/**
  * @brief  <EFBFBD><EFBFBD>ȡ PC0 <EFBFBD><EFBFBD>ѹ
  * @retval <EFBFBD><EFBFBD>ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ V
  */
float ADC_Get_PC0(void)
{
    return ADCxValues[0] * 3.3 / 65536;
}

/**
  * @brief  <EFBFBD><EFBFBD>ȡ PC1 <EFBFBD><EFBFBD>ѹ
  * @retval <EFBFBD><EFBFBD>ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ V
  */
float ADC_Get_PC1(void)
{
    return ADCxValues[1] * 3.3 / 65536;
}

/**
  * @brief  TIM3 <EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD> 
  */
void TIM3_IRQHandler(void)
{
    if ((TIM3->SR & TIM_FLAG_UPDATE) != RESET)
    {
        //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>־
        TIM3->SR = ~TIM_FLAG_UPDATE;

        SCB_InvalidateDCache_by_Addr((uint32_t *)ADCxValues, sizeof(uint32_t));
    }
}