新到手的开发板，先发一个自己做的一个简单串口例子
由于之前未使用过MDK510所以记录之，并分享给大家。
如下是STM32F4调试的串口程序：
#include "usart2.h"
void MyUartInit(void )
{
//NVIC_Config();
STM_EVAL_COMInit();
USART_Configuration(115200);
// USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}
void STM_EVAL_COMInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
/* Enable UART clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/* Connect PXx to USARTx_Tx*/
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_USART1);
/* Connect PXx to USARTx_Rx*/
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_USART1);
/* Configure USART Tx as alternate function */
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure USART Rx as alternate function */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void USART_Configuration(int BaudRate)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = BaudRate;
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); /* Configure USART1 basic and asynchronous paramters */
USART_Cmd(USART1, ENABLE); /* Enable USART1 */
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the USARTx Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int fputc(int ch, FILE *f)
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (u8) ch);
/* Loop until the end of transmission */
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{
}
return ch;
}
int fgetc(FILE *f)
{
while (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET);
return (int)USART_ReceiveData(USART2);
}
void USART1_IRQHandler(void)
{
char c;
if(USART_GetFlagStatus(USART1,USART_FLAG_RXNE)==SET)
{
c = USART_ReceiveData(USART1);
USART_SendData(USART1,c);
USART_ClearITPendingBit(USART1,USART_IT_RXNE);
// GPIO_ToggleBits(GPIOD,GPIO_Pin_14);
}
}
usart.rar
(42.13 KB)
|
楼主
标题置顶
标题高亮
必学的，高技术就别怕复杂吗！
