STM32G031-使用STM32CubeIDE实现DMA处理ADC
一、USART配置
二、ADC配置
配置完成后，生成代码即可。。。
三、用户代码
/* USER CODE BEGIN Includes */
#include "stdio.h"
/* USER CODE END Includes */
/* USER CODE BEGIN PD */
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch,FILE F)
#endif
PUTCHAR_PROTOTYPE
{
LL_USART_TransmitData8(USART2, (uint8_t)ch);
while(!LL_USART_IsActiveFlag_TXE(USART2)){
}
return ch;
}
/* USER CODE END PD */
/* USER CODE BEGIN PV */
uint16_t ADC_ConvertedValue[150];
uint8_t i;
uint32_t ad0,ad1,ad4;
/* USER CODE END PV */
/* USER CODE BEGIN 0 */
void ADC_DMA_Config_Start(void)
{
LL_mDelay(2); //延时2ms，避免DMA读取数据通道不对
// LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_1, LL_DMA_PRIORITY_HIGH);
LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_1, 150);
LL_DMA_SetMemoryAddress(DMA1, LL_DMA_CHANNEL_1,(uint32_t)ADC_ConvertedValue);
LL_DMA_SetPeriphAddress(DMA1, LL_DMA_CHANNEL_1,LL_ADC_DMA_GetRegAddr(ADC1,LL_ADC_DMA_REG_REGULAR_DATA));
LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_1);
LL_ADC_StartCalibration(ADC1);
while(LL_ADC_IsCalibrationOnGoing(ADC1));
LL_ADC_Enable(ADC1);
LL_ADC_REG_StartConversion(ADC1);
LL_ADC_REG_SetDMATransfer(ADC1, LL_ADC_REG_DMA_TRANSFER_UNLIMITED);
}
/* USER CODE END 0 */
/* USER CODE BEGIN 2 */
printf("STM32CubeMX Test...\r\n");
ADC_DMA_Config_Start();
/* USER CODE END 2 */
/* USER CODE BEGIN 3 */
for(i = 0,ad0 = 0,ad1 = 0,ad4 = 0; i < 150;){
ad0 += ADC_ConvertedValue[i++];
ad1 += ADC_ConvertedValue[i++];
ad4 += ADC_ConvertedValue[i++];
}
ad0 /= 50; // 实现均匀滤波
ad1 /= 50; // 实现均匀滤波
ad4 /= 50; // 实现均匀滤波
// printf("ADC->CH1 Value:%lf\r\n",(float)ad0*3.3/4095);
// printf("ADC->CH2 Value:%lf\r\n",(float)ad1*3.3/4095);
// printf("ADC->CH4 Value:%lf\r\n",(float)ad4*3.3/4095);
printf("ADC Value:%lf,%lf,%lf\r\n",(float)ad0*3.3/4095,(float)ad1*3.3/4095,(float)ad4*3.3/4095);
}
/* USER CODE END 3 */