CH32V307VCT6 多通道DMA

只看该作者 · 2022-9-1 06:48

/********************************** (C) COPYRIGHT *******************************
* File Name       : main.c
* Author          : WCH
* Version          : V1.0.0
* Date             : 2021/06/06
* Description       : Main program body.
*******************************************************************************/

/*
*@NOTE
ADC使用DMA采样例程：
ADC通道2(PA2),规则组通道通过DMA获取 ADC连续1024次转换数据。

*/
#define  length  5
#include "debug.h"
//extern u16 ADC_ConvertedValue[length];
u16 ADC_ConvertedValue[length]={0,0,0};
/* Global Variable */
u16 TxBuf[1024];
s16 Calibrattion_Val = 0;

/*******************************************************************************
* Function Name  : ADC_Function_Init
* Description : Initializes ADC collection.
* Input       : None
* Return       : None
*******************************************************************************/
void ADC_Function_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 , ENABLE ); //使能GPIOA时钟和ADC

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5; //PA1~5对应ADC通道1~5
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //GPIO模式为模拟输入
GPIO_Init(GPIOA, &GPIO_InitStructure);

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;  //配置ADC为独立模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE;       //多通道模式下开启扫描模式
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;  //设置开启连续转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //设置转换不是由外部触发启动，软件触发启动
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //设置ADC数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = length;          //规则转换的ADC通道的数目
ADC_Init(ADC1, &ADC_InitStructure);                   //根据ADC_InitStructure中指定的参数初始化ADC1寄存器

RCC_ADCCLKConfig(RCC_PCLK2_Div6); //设置ADC时钟分频为6分频

ADC_Cmd(ADC1, ENABLE);    //使能ADC1

ADC_ResetCalibration(ADC1); //重置ADC1校准寄存器。

while(ADC_GetResetCalibrationStatus(ADC1)); //等待复位校准结束

ADC_StartCalibration(ADC1); //开启AD校准

while(ADC_GetCalibrationStatus(ADC1));    //等待校准结束
}

/*******************************************************************************
* Function Name  : Get_ADC_Val
* Description : Returns ADCx conversion result data.
* Input       : ch: ADC channel.
*                   ADC_Channel_0: ADC Channel0 selected. PA0
*                   ADC_Channel_1: ADC Channel1 selected. PA1
*                   ADC_Channel_2: ADC Channel2 selected. PA2
*                   ADC_Channel_3: ADC Channel3 selected. PA3
*                   ADC_Channel_4: ADC Channel4 selected. PA4
*                   ADC_Channel_5: ADC Channel5 selected. PA5
*                   ADC_Channel_6: ADC Channel6 selected. PA6
*                   ADC_Channel_7: ADC Channel7 selected. PA7
*                   ADC_Channel_8: ADC Channel8 selected. PB0
*                   ADC_Channel_9: ADC Channel9 selected. PB1
*                   ADC_Channel_10: ADC Channel10 selected. PC0
*                   ADC_Channel_11: ADC Channel11 selected. PC1
*                   ADC_Channel_12: ADC Channel12 selected. PC2
*                   ADC_Channel_13: ADC Channel13 selected. PC3
*                   ADC_Channel_14: ADC Channel14 selected. PC4
*                   ADC_Channel_15: ADC Channel15 selected. PC5
*                   ADC_Channel_16: ADC Channel16 selected.
*                   ADC_Channel_17: ADC Channel17 selected.
* Return       : val: The Data conversion value.
*******************************************************************************/
u16 Get_ADC_Val(u8 ch)
{
u16 val;

ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 );
ADC_SoftwareStartConvCmd(ADC1, ENABLE);

while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
val = ADC_GetConversionValue(ADC1);

return val;
}

/*******************************************************************************
* Function Name  : DMA_Tx_Init
* Description : Initializes the DMAy Channelx configuration.
* Input       : DMA_CHx:
*                   x can be 1 to 7.
*                ppadr: Peripheral base address.
*                memadr: Memory base address.
*                bufsize: DMA channel buffer size.
* Return       : None
*******************************************************************************/
void DMA_Tx_Init( void )
{
DMA_InitTypeDef DMA_InitStructure;

RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE ); //使能开启DMA时钟

DMA_DeInit(DMA1_Channel1); //复位DMA控制器

DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->RDATAR;  //配置外设地址为ADC数据寄存器地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_ConvertedValue; //配置存储器地址为读取ADC值地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;             //配置数据源为外设，即DMA传输方式为外设到存储器
DMA_InitStructure.DMA_BufferSize = length;                   //设置DMA数据缓冲区大小，此处设置为length
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//设置DMA外设递增模式关闭
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;       //设置DMA存储器递增模式开启
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //设置外设数据大小为半字，即两个字节
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;       //设置存储器数据大小为半字，即两个字节
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;    //设置DMA模式为循环传输模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //设置DMA传输通道优先级为高，当使用一 DMA通道时，优先级设置不影响
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;       //因为此DMA传输方式为外设到存储器，因此禁用存储器到存储器传输方式
DMA_Init( DMA1_Channel1, &DMA_InitStructure );    //初始化DMA
DMA_Cmd(DMA1_Channel1 , ENABLE);  //使能DMA
// 配置 ADC 通道转换顺序为1，第一个转换，采样时间为55.5个时钟周期
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 4, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 5, ADC_SampleTime_55Cycles5);

// 使能ADC DMA 请求
ADC_DMACmd(ADC1, ENABLE);

// 由于没有采用外部触发，所以使用软件触发ADC转换
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}

/*******************************************************************************
* Function Name  : main
* Description : Main program.
* Input       : None
* Return       : None
*******************************************************************************/
int main(void)
{
u16 i;

Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);

  ADC_Function_Init();
  printf("CalibrattionValue:%d\n", Calibrattion_Val);
//
DMA_Tx_Init(  );
// DMA_Cmd( DMA1_Channel1, ENABLE );
//
// ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 1, ADC_SampleTime_239Cycles5 );
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
//  Delay_Ms(50);
// ADC_SoftwareStartConvCmd(ADC1, DISABLE);

// for(i=0; i<1024; i++)
// {
// printf( "%04d\r\n", TxBuf+Calibrattion_Val );
// Delay_Ms(10);
// }

// while(1);

  while (1)
{

   printf("\r\n The current ADCH1 value = %d \r\n", ADC_ConvertedValue[0]);
   printf("\r\n The current ADCH2 value = %d \r\n", ADC_ConvertedValue[1]);
   printf("\r\n The current ADCH3 value = %d \r\n", ADC_ConvertedValue[2]);
   printf("\r\n The current ADCH4 value = %d \r\n", ADC_ConvertedValue[3]);
   printf("\r\n The current ADCH5 value = %d \r\n", ADC_ConvertedValue[4]);

   Delay_Ms(500);
}

}