96 lines
2.7 KiB
C
96 lines
2.7 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 : 2022/08/08
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* Description : Main program body.
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* SPDX-License-Identifier: Apache-2.0
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*******************************************************************************/
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/*
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*@Note
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轮询收发模式例程：
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Master：USART1_Tx(PD5)、USART1_Rx(PD6)。
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本例程演示 USART1 收到CH341发送的数据取反发出（波特率 115200）。
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注：
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硬件连线：PD5 —— Rx
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PD6 —— Tx
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*/
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#include "debug.h"
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/* Global define */
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/* Global Variable */
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vu8 val;
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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_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_USART1, ENABLE);
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/* USART1 TX-->D.5 RX-->D.6 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
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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(GPIOD, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOD, &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(USART1, &USART_InitStructure);
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USART_Cmd(USART1, 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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USARTx_CFG();
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while(1)
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{
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while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
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{
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/* waiting for receiving finish */
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}
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val = (USART_ReceiveData(USART1));
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USART_SendData(USART1, ~val);
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while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
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{
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/* waiting for sending finish */
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}
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}
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}
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