/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2019/10/15
 * Description        : Main program body.
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * SPDX-License-Identifier: Apache-2.0
 *******************************************************************************/  

/*
 *@Note
 多处理器通信模式例程：
 Master：USART2_Tx(PA2)、USART2_Rx(PA3)。
 Slave：USART3_Tx(PB10)、USART3_Rx(PB11)。
 
 本例程演示 USART2 作主机，USART3 作从机，USART2发送地址 0x02，使 USART3退出
 静默模式，完成后续通信。
 注：
     硬件连线：PA2 —— PB11
	           PA3 —— PB10

*/

#include "debug.h"


/* Global typedef */

/* Global define */

/* Global Variable */ 


/*********************************************************************
 * @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_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_USART3, ENABLE);	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB , ENABLE);	
	
  /* USART2 TX-->A.2   RX-->A.3 */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; 
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	
  GPIO_Init(GPIOA, &GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA, &GPIO_InitStructure);	
  /* 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_9b;
	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(USART2, &USART_InitStructure); 
	USART_Init(USART3, &USART_InitStructure); 

  USART_Cmd(USART2, ENABLE); 
	USART_Cmd(USART3, ENABLE); 
  USART_SetAddress(USART2, 0x1);
  USART_SetAddress(USART3, 0x2);
  USART_WakeUpConfig(USART3, USART_WakeUp_AddressMark);	
	USART_ReceiverWakeUpCmd(USART3,ENABLE);                       /* USART3 Into Silence */
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  Delay_Init();
	USART_Printf_Init(115200);                                     /* printf using USART1 */
	printf("SystemClk:%d\r\n",SystemCoreClock);
	printf("USART MultiProcessor TEST\r\n");
  USARTx_CFG();                                                 /* USART2 & USART3 Initializes */  
 
	while(1)
  {	
  	USART_SendData(USART2, 0x102);                              /* Send USART3’s addr */
		while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET) /* waiting for sending finish */
		{	                                                          
		} 
		USART_SendData(USART2, 0xAA);
    while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET) /* waiting for sending finish */
		{	                                                          
		} 	
		if(USART_GetFlagStatus(USART3, USART_FLAG_RXNE) != RESET)
    {
      if(USART_ReceiveData(USART3) == 0xAA)
      {
        printf("USART3 Receive Data\r\n");
				Delay_Ms(1000);
      }
    }
				
	}
}


