初学串口,串口发送有数据,但数据错误,按照例程编的,就是不知道哪里有问题,贴出来请教各位老师。
#include "stm32f10x.h"
void Delay(unsigned int x);
void UART_Init(void);
void UART2_PutChar(unsigned char ch);
int main(void)
{
SystemInit();
UART_Init();
while(1)
{
Delay(6550);
UART2_PutChar(0x26);
}
void UART_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOC,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;//定义串口结构体
USART_InitStructure.USART_BaudRate=9600;
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(USART2,&USART_InitStructure);
USART_Cmd(USART2,ENABLE);
}
void UART2_PutChar(unsigned char ch)
{
USART_SendData(USART2,ch);
while(USART_GetFlagStatus(USART2,USART_FLAG_TXE) == RESET);
}
void Delay(unsigned int x)
{
unsigned int t;
t=x;
while(t--);
}
|