first submission
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qiyongshuang
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/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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USARTinterrupt routine:
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Master:USART2_Tx(PA2)\USART2_Rx(PA3).
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Slave:USART3_Tx(PB10)\USART3_Rx(PB11).
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This example demonstrates that UART2 and USART3 use query to send and interrupt to receive.
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Hardware connection:PA2 -- PB11
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PA3 -- PB10
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*/
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#include "debug.h"
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/* Global define */
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#define TxSize1 (size(TxBuffer1))
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#define TxSize2 (size(TxBuffer2))
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#define size(a) (sizeof(a) / sizeof(*(a)))
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/* Global typedef */
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typedef enum
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{
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FAILED = 0,
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PASSED = !FAILED
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} TestStatus;
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/* Global Variable */
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u8 TxBuffer1[] = "*Buffer1 Send from USART2 to USART3 using Interrupt!"; /* Send by UART2 */
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u8 TxBuffer2[] = "#Buffer2 Send from USART3 to USART2 using Interrupt!"; /* Send by UART3 */
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u8 RxBuffer1[TxSize1] = {0}; /* USART2 Using */
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u8 RxBuffer2[TxSize2] = {0}; /* USART3 Using */
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volatile u8 TxCnt1 = 0, RxCnt1 = 0;
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volatile u8 TxCnt2 = 0, RxCnt2 = 0;
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volatile u8 Rxfinish1 = 0, Rxfinish2 = 0;
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TestStatus TransferStatus1 = FAILED;
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TestStatus TransferStatus2 = FAILED;
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void USART2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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void USART3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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/*********************************************************************
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* @fn Buffercmp
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*
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* @brief Compares two buffers
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*
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* @param Buf1,Buf2 - buffers to be compared
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* BufferLength - buffer's length
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*
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* @return PASSED - Buf1 identical to Buf
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* FAILED - Buf1 differs from Buf2
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*/
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TestStatus Buffercmp(uint8_t *Buf1, uint8_t *Buf2, uint16_t BufLength)
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{
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while(BufLength--)
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{
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if(*Buf1 != *Buf2)
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{
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return FAILED;
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}
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Buf1++;
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Buf2++;
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}
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return PASSED;
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}
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/*********************************************************************
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* @fn USARTx_CFG
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*
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* @brief Initializes the USART2 & USART3 peripheral.
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*
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* @return none
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*/
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void USARTx_CFG(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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USART_InitTypeDef USART_InitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 | RCC_APB1Periph_USART3, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);
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/* USART2 TX-->A.2 RX-->A.3 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* USART3 TX-->B.10 RX-->B.11 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
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USART_Init(USART2, &USART_InitStructure);
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USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
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USART_Init(USART3, &USART_InitStructure);
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USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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USART_Cmd(USART2, ENABLE);
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USART_Cmd(USART3, ENABLE);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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Delay_Init();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf("USART Interrupt TEST\r\n");
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USARTx_CFG(); /* USART2 & USART3 INIT */
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while(TxCnt2 < TxSize2) /* USART3--->USART2 */
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{
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USART_SendData(USART3, TxBuffer2[TxCnt2++]);
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while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET) /* waiting for sending finish */
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{
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}
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}
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while(TxCnt1 < TxSize1) /* USART2--->USART3 */
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{
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USART_SendData(USART2, TxBuffer1[TxCnt1++]);
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while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET) /* waiting for sending finish */
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{
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}
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}
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Delay_Ms(100);
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while(!Rxfinish1 || !Rxfinish2) /* waiting for receiving int finish */
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{
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}
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TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxSize1);
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TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxSize2);
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if(TransferStatus1 && TransferStatus2)
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{
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printf("\r\nSend Success!\r\n");
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}
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else
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{
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printf("\r\nSend Fail!\r\n");
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}
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printf("TxBuffer1---->RxBuffer2 TxBuffer2---->RxBuffer1\r\n");
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printf("TxBuffer1:%s\r\n", TxBuffer1);
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printf("RxBuffer1:%s\r\n", RxBuffer1);
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printf("TxBuffer2:%s\r\n", TxBuffer2);
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printf("RxBuffer2:%s\r\n", RxBuffer2);
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while(1)
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{
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}
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}
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/*********************************************************************
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* @fn USART2_IRQHandler
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*
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* @brief This function handles USART2 global interrupt request.
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*
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* @return none
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*/
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void USART2_IRQHandler(void)
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{
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if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
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{
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RxBuffer1[RxCnt1++] = USART_ReceiveData(USART2);
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if(RxCnt1 == TxSize2)
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{
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USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
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Rxfinish1 = 1;
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}
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}
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}
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/*********************************************************************
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* @fn USART3_IRQHandler
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*
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* @brief This function handles USART3 global interrupt request.
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*
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* @return none
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*/
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void USART3_IRQHandler(void)
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{
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if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
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{
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RxBuffer2[RxCnt2++] = USART_ReceiveData(USART3);
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if(RxCnt2 == TxSize1)
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{
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USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
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Rxfinish2 = 1;
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}
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}
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}
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