/*
*@Note
USART中断例程：
Master：USART2_Tx(PA2)、USART2_Rx(PA3)。
Slave：USART3_Tx(PB10)、USART3_Rx(PB11)。
本例程演示 UART2 和 USART3 使用查询发送，中断接收。
注：
硬件连线：PA2 —— PB11
PA3 —— PB10
*/
//#include "debug.h"
#include "ch32v10x.h"
/* Global define */
#define TxSize1 (size(TxBuffer1))
#define TxSize2 (size(TxBuffer2))
#define size(a) (sizeof(a) / sizeof(*(a)))
/* Global typedef */
typedef enum
{
FAILED = 0,
PASSED = !FAILED
} TestStatus;
/* Global Variable */
u8 TxBuffer1[] = "*Buffer1 Send from USART2 to USART3 using Interrupt!"; /* Send by UART2 */
u8 TxBuffer2[] = "#Buffer2 Send from USART3 to USART2 using Interrupt!"; /* Send by UART3 */
u8 RxBuffer1[TxSize1] = {0}; /* USART2 Using */
u8 RxBuffer2[10] = {0}; /* USART3 Using */
u8 TxCnt1 = 0, RxCnt1 = 0;
u8 TxCnt2 = 0, RxCnt2 = 0;
u8 Rxfinish2 = 0;
TestStatus TransferStatus1 = FAILED;
TestStatus TransferStatus2 = FAILED;
void USART3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
/*********************************************************************
* @fn Buffercmp
*
* @brief Compares two buffers
*
* @param Buf1,Buf2 - buffers to be compared
* BufferLength - buffer's length
*
* @return PASSED - Buf1 identical to Buf
* FAILED - Buf1 differs from Buf2
*/
TestStatus Buffercmp(uint8_t *Buf1, uint8_t *Buf2, uint16_t BufLength)
{
while(BufLength--)
{
if(*Buf1 != *Buf2)
{
return FAILED;
}
Buf1++;
Buf2++;
}
return PASSED;
}
/*********************************************************************
* @fn USARTx_CFG
*
* @brief Initializes the USART2 & USART3 peripheral.
*
* @return none
*/
void USARTx_CFG(void)
{
GPIO_InitTypeDef GPIO_InitStructure = {0};
USART_InitTypeDef USART_InitStructure = {0};
NVIC_InitTypeDef NVIC_InitStructure = {0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
/* USART3 TX-->B.10 RX-->B.11 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &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_Tx | USART_Mode_Rx;
USART_Init(USART3, &USART_InitStructure);
USART3->STATR = 0x00C0;
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART3, ENABLE);
}
void usart_send(u8 *ch)
{
while(*ch)
{
USART_SendData(USART3,*ch++) ;
while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);
}
}
/*********************************************************************
* @fn main
*
* @brief Main program.
*
* @return none
*/
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
Delay_Init();
// USART_Printf_Init(115200);
//printf("SystemClk:%d\r\n", SystemCoreClock);
//printf("33333333 Interrupt TEST\r\n");
USARTx_CFG(); /* USART2 & USART3 INIT */
Delay_Ms(100);
while(1){
usart_send(RxBuffer2);
Delay_Ms(1000);
if(Rxfinish2==1)
{
Rxfinish2=0;
usart_send("0");
// USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}
}
}
/*********************************************************************
* @fn USART3_IRQHandler
*
* @brief This function handles USART3 global interrupt request.
*
* @return none
*/
void USART3_IRQHandler(void)
{
if(USART_GetITStatus(USART3, USART_IT_RXNE) !=RESET)
{
RxBuffer2[RxCnt2++] = USART_ReceiveData(USART3);
if(RxCnt2 >10)
{Rxfinish2 = 1;
// USART_ClearITPendingBit(USART3, USART_IT_RXNE);
// USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
RxCnt2=0;
}
}
}
各位大哥看看这到底那个标志位不对，发送没问题，一直接收不到，完全调不通，Rxfinish2一直等于1，也就是说就算没接收也是一直进接收中断，感觉向外发送字节也引发了USART_IT_RXEN中断。串口助手发给103的根本收不到，RxBuffer2里面啥都没有。
