TA的每日心情 | 开心
2015-3-24 10:15 |
|---|
签到天数: 6 天 连续签到: 1 天 [LV.2]偶尔看看I
|
楼主 |
发表于 2014-12-9 17:47:11
|
显示全部楼层
Currant 发表于 2014-12-8 17:57 
把接收的程序发来看看吧，掉数据一般应该是没有及时的读取接收字节造成的 ...
/******************** (C) COPYRIGHT 2010 HY嵌入式开发工作室 ********************
* Description : 演示的是4个蓝色LED（D1-D4) 轮流闪烁
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include <stdio.h>
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{}
return ch;
}
GPIO_InitTypeDef GPIO_InitStructure;
void RCC_Configuration(void);
void UART_Init(void);
void Uart1Putchar(u8 ch);
u8 temp_trx;
// NVIC_SetPriority
int main(void)
{
/* System Clocks Configuration **********************************************/
RCC_Configuration();
/* Configure all unused GPIO port pins in Analog Input mode (floating input
trigger OFF), this will reduce the power consumption and increase the device
immunity against EMI/EMC *************************************************/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD |
RCC_APB2Periph_GPIOE|RCC_APB2Periph_AFIO, ENABLE);
UART_Init();
printf("\n\rUSART Printf Example: retarget the C library printf function to the USART\n\r");
while (1)
{
}
}
void RCC_Configuration(void)
{
/* Setup the microcontroller system. Initialize the Embedded Flash Interface,
initialize the PLL and update the SystemFrequency variable. */
SystemInit();
}
/*void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
} */
void UART_Init(void)
{
USART_InitTypeDef USART_InitStructure ;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 ; //TX
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_10 ; //RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_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_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //串口1接收采用中断方式
USART_Cmd(USART1, ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC); // 防止串口第一字节丢失
USART_ClearFlag(USART1,USART_FLAG_RXNE);//
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
USART_ClearITPendingBit(USART1, USART_IT_TC);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Uart1Putchar(u8 ch)
{
USART_SendData(USART1, ch);
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) ;
}
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
temp_trx=USART_ReceiveData(USART1); //这个地方忘记修改了没有修改前为USART2
Uart1Putchar(temp_trx);
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval : None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
|
|
发表于 2014-12-8 12:25:36
/4 
