帮我写一个stm32f10串口dma接收数据代码示例
时间: 2023-05-20 12:02:31 浏览: 57
当然可以,以下是一个基本的示例代码:
```c
#include "stm32f10x.h"
#define BUFFER_SIZE 256
uint8_t buffer[BUFFER_SIZE];
void init_uart()
{
// 初始化串口
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
// 初始化 DMA
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(USART1->DR);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = BUFFER_SIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel5, &DMA_InitStructure);
// 启动 DMA
DMA_Cmd(DMA1_Channel5, ENABLE);
// 启动串口接收
USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
}
int main()
{
init_uart();
while (1) {
// 处理接收到的数据
for (int i = 0; i < BUFFER_SIZE; i++) {
if (buffer[i] == '\n') {
// 处理一行数据
// ...
}
}
}
}
```
这个代码示例使用了 STM32F10 的 USART1 和 DMA1,通过 DMA 接收串口数据,并将数据存储在一个缓冲区中。在主循环中,可以处理接收到的数据。注意,这个示例代码并没有处理数据的完整性和错误检测,需要根据实际情况进行修改。