#include "
STM32f30x.h"
#define uint unsigned int
int main()
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//enable clk
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_DeInit(GPIOA);
USART_DeInit(USART1);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//TX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;//LED
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
USART_InitStructure.USART_BaudRate = 115200;//UART
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);//EN UART
USART_SendData(USART1, 0X55);
while(USART_GetFlagStatus(USART1, USART_FLAG_TC)==1)
{
GPIO_SetBits(GPIOA, GPIO_Pin_5);
}
}
缺少端口复用的吧,你试试
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