/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2022/08/08
 * Description        : Main program body.
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * SPDX-License-Identifier: Apache-2.0
 *******************************************************************************/

/*
 *@Note
 轮询收发模式例程：
 Master：USART1_Tx(PD5)、USART1_Rx(PD6)。
 本例程演示 USART1 收到CH341发送的数据取反发出（波特率 115200）。

 注：
     硬件连线：PD5 —— Rx
           PD6 —— Tx

*/

#include "debug.h"


/* Global define */


/* Global Variable */
vu8 val;

/*********************************************************************
 * @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};

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_USART1, ENABLE);

    /* USART1 TX-->D.5   RX-->D.6 */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOD, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOD, &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(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);
}

/*********************************************************************
 * @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);

    USARTx_CFG();

    while(1)
    {

        while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
        {
            /* waiting for receiving finish */
        }
        val = (USART_ReceiveData(USART1));
        USART_SendData(USART1, ~val);
        while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
        {
            /* waiting for sending finish */
        }
    }
}