#include "stm32f30x.h" #define uint unsigned int #define uchar unsigned char uint i,j,k; uchar h; /*void Delay(i) { for(j=0;j<=i;j++) { for(k=0;k<=1000;k++); } }*/ void NVIC_Configuration(void); void USART1_IRQHandler(void); void RCC_Configuration(void); void UASRT_Configuration(void); void GPIO_Configyration(void); int main() { RCC_Configuration(); USART1_IRQHandler(); GPIO_Configyration(); UASRT_Configuration(); NVIC_Configuration(); //USART_SendData(USART1, 0X99); while(1); } void RCC_Configuration(void) { RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//enable clk RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); GPIO_DeInit(GPIOA); USART_DeInit(USART1); } void NVIC_Configuration(void) { NVIC_InitTypeDef USART_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); USART_InitStructure.NVIC_IRQChannel=USART1_IRQn; USART_InitStructure.NVIC_IRQChannelPreemptionPriority=1; USART_InitStructure.NVIC_IRQChannelSubPriority=5; USART_InitStructure.NVIC_IRQChannelCmd=ENABLE; NVIC_Init(&USART_InitStructure); } void USART1_IRQHandler(void) { if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET) { USART_SendData(USART1,USART_ReceiveData(USART1)); while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET); } } void UASRT_Configuration(void) { USART_InitTypeDef USART_InitStructure; 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; USART_Init(USART1, &USART_InitStructure); USART_ITConfig(USART1, USART_FLAG_RXNE, ENABLE); USART_Cmd(USART1, ENABLE);//EN UART USART_ClearFlag(USART1,USART_FLAG_TC); } void GPIO_Configyration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_7); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//TX GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_7); } 请大神帮我看一下,为什么不能收发数据啊?谢谢了 |
void USART_InitConfig(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_7);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_7);
/*
* USART1_TX -> PA9 , USART1_RX -> PA10
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
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(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
/*Enable the USART1 Interrupt(??USART1??)*/
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void UART_send_byte(uint8_t byte) //µ¥×Ö½Ú·¢ËÍ
{
while(!((USART1->ISR)&(1<<7)));
USART1->TDR=byte;
}
void UART_Send(uint8_t *Buffer, uint32_t Length)
{
while(Length != 0)
{
while(!((USART1->ISR)&(1<<7)));//µÈ´ý·¢ËÍÍê
USART1->TDR= *Buffer;
Buffer++;
Length--;
}
}
对照看一下,你的程序写的有点乱。。
好的 版主谢谢
版主 你的中断函数呢? 能给我看一下吗
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
rx[i++] = USART_ReceiveData(USART1);
}
if(i == 8)
{
i = 0;
uart_flag = 1;
}