关于USART1 发送0x11串口助手收到fc fc

花牛 · 发表于 2017-12-11 18:58:41

[mw_shl_code=c,true]#include "usart.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__ */

/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

void uartGpioInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

//#if defined (Open_UART1)
#ifdef Open_UART1
USART1_GPIO_Cmd(USART1_GPIO_CLK, ENABLE);
USART1_AFIO_Cmd(USART1_AFIO_CLK, ENABLE);
USART1_CLK_Cmd(USART1_CLK, ENABLE);

GPIO_InitStructure.GPIO_Pin = USART1_TxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USART1_GPIO_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = USART1_RxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USART1_GPIO_PORT, &GPIO_InitStructure);
#endif

//#if defined (Open_UART2)
#ifdef Open_UART2
USART2_GPIO_Cmd(USART2_GPIO_CLK, ENABLE);
USART2_CLK_Cmd(USART2_CLK, ENABLE);
USART2_AFIO_Cmd(USART2_AFIO_CLK, ENABLE);

GPIO_InitStructure.GPIO_Pin = USART2_TxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USART2_GPIO_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = USART2_RxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USART2_GPIO_PORT, &GPIO_InitStructure);
#endif

//#if defined (Open_UART3)
#ifdef Open_UART3
USART3_GPIO_Cmd(USART3_GPIO_CLK, ENABLE);
USART3_CLK_Cmd(USART3_CLK, ENABLE);
USART3_AFIO_Cmd(USART3_AFIO_CLK, ENABLE);
GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);

GPIO_InitStructure.GPIO_Pin = USART3_TxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USART3_GPIO_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = USART3_RxPin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USART3_GPIO_PORT, &GPIO_InitStructure);
#endif
}
/*********************************************************************
* @brief  UART configuration
* @param  None
* @retval None
* @date 20141205
***********************************************************************/
void uartConfig(void)
{
USART_InitTypeDef USART_InitStructure;
//#if defined (Open_UART1)
#ifdef Open_UART1
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_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_Cmd(USART1, ENABLE);
USART_ClearFlag(USART1, USART_FLAG_TC);

#endif
}

void nvicConfiguration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
//#if defined (Open_UART1)
#ifdef Open_UART1
/*使能串口中断,并设置优先级*/
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);
#endif
}

void uart1SendData(uint16_t data)
{
USART_SendData(USART1,data);
//Loop until the end of transmission
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}

void uartxInit(void)
{
uartGpioInit();
uartConfig();
nvicConfiguration();
}

void USART1_IRQHandler(void)
{
u16 com;
if(USART_GetITStatus(USART1,USART_FLAG_RXNE) != RESET)
      {
      com = USART_ReceiveData(USART1);
      if(com == 0x34);
         {
         uart1SendData(0x55);
         uart1SendData(0x56);          }
      USART_ClearITPendingBit(USART1, USART_IT_RXNE);    //clera interrupt