165 lines
4.8 KiB
C
165 lines
4.8 KiB
C
/********************************** (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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*polling transceiver mode, master/slave transceiver 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 sending from USART2 and receiving from USART3.
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*
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* Hardware connection:PA2--PB11
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* PA3--PB10
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*
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*/
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#include "debug.h"
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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 define */
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#define TxSize (size(TxBuffer))
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#define size(a) (sizeof(a) / sizeof(*(a)))
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/* Global Variable */
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u8 TxBuffer[] = "Buffer Send from USART2 to USART3 by polling!";
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u8 RxBuffer[TxSize] = {0};
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u8 TxCnt = 0, RxCnt = 0;
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TestStatus TransferStatus = FAILED;
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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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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_Cmd(USART2, ENABLE);
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USART_Init(USART3, &USART_InitStructure);
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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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SystemCoreClockUpdate();
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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( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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printf("USART Polling TEST\r\n");
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USARTx_CFG(); /* USART2 & USART3 INIT */
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while(TxCnt < TxSize)
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{
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USART_SendData(USART2, TxBuffer[TxCnt++]);
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while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET)
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{
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/* waiting for sending finish */
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}
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while(USART_GetFlagStatus(USART3, USART_FLAG_RXNE) == RESET)
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{
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/* waiting for receiving finish */
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}
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RxBuffer[RxCnt++] = (USART_ReceiveData(USART3));
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}
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TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxSize);
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if(TransferStatus)
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{
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printf("send success!\r\n");
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printf("TXBuffer: %s \r\n", TxBuffer);
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printf("RxBuffer: %s \r\n", RxBuffer);
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}
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else
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{
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printf("send fail!\r\n");
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printf("TXBuffer: %s \r\n", TxBuffer);
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printf("RxBuffer: %s \r\n", RxBuffer);
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}
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while(1)
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{
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}
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}
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