/*
?*@Note
?USART中斷例程：
?Master：USART2_Tx(PA2)、USART2_Rx(PA3)。
?Slave：USART3_Tx(PB10)、USART3_Rx(PB11)。
?本例程演示 UART2 和 USART3 使用查詢(xún)發(fā)送，中斷接收。
?注：
? ? ?硬件連線：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;
? ? ? ?}
? ? }
}
各位大哥看看這到底那個(gè)標(biāo)志位不對(duì)，發(fā)送沒(méi)問(wèn)題，一直接收不到，完全調(diào)不通，Rxfinish2一直等于1，也就是說(shuō)就算沒(méi)接收也是一直進(jìn)接收中斷，感覺(jué)向外發(fā)送字節(jié)也引發(fā)了USART_IT_RXEN中斷。串口助手發(fā)給103的根本收不到，RxBuffer2里面啥都沒(méi)有。
