/**
 *******************************************************************************
 * @file    uart_halfduplex.c
 *
 * @brief   Implement system specific functions.
 *
 * @author  DP
 *
 * @version V1.0.0
 *
 * @date    2026-4-15
 *
 *******************************************************************************/

/*
    Copyright (c) 2024, DP Microelectronics Inc.

    Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation
       and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors
       may be used to endorse or promote products derived from this software without
       specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
*/

/* Files include */
#include "uart_halfduplex.h"

/**
  * @addtogroup DPM32M030_LibSamples
  * @{
  */

/**
  * @addtogroup UART
  * @{
  */

/**
  * @addtogroup UART Printf
  * @{
  */

/* Private typedef --------------------------------------------------------------*/

/* Private define ---------------------------------------------------------------*/

/* Private macro ----------------------------------------------------------------*/

/* Private variables ------------------------------------------------------------*/
volatile uint8_t g_rx_byte = 0;
volatile uint8_t g_rx_flag = 0;   // 收到数据标志
/* Private functions ------------------------------------------------------------*/

/**
 *******************************************************************************
 * @brief   UART IRQ Handler .
 * @param   None.
 * @retval  None.
 ******************************************************************************/
void UART0_IRQ_Handler(void)
{
    if (UART_GetIntFlagStatus(UART0, UART_INT_FLAG_RXNE) == SET)
    {
        g_rx_byte = (uint8_t)UART_ReceiveData(UART0);
        g_rx_flag = 1;
        UART_ClearIntFlag(UART0, UART_INT_FLAG_RXNE);
    }  
}
/**
 *******************************************************************************
 * @brief   UART GPIO Config.
 * @param   None.
 * @retval  None.
 ******************************************************************************/
void UART_GPIOConfig(void)
{
  /* Enable clock */
  RCC_Unlock();
  RCC_AHBPeriphClockCmd(RCC_AHB_PERIPH_GPIO, ENABLE);
  RCC_Lock();

  /* connect port to UARTx Pin */
  GPIO_InitTypeStruct GPIO_InitStruct;
  GPIO_StructInit(&GPIO_InitStruct);
  GPIO_InitStruct.GPIO_Mode = GPIO_MODE_ALT_FUNC;
  GPIO_InitStruct.GPIO_Speed = GPIO_SPEED_HIGH;
  GPIO_InitStruct.GPIO_OType =  GPIO_OTYPE_OD; //开漏
  GPIO_InitStruct.GPIO_PuPd = GPIO_PUPD_UP;    //上拉

  GPIO_InitStruct.GPIO_Pin =  GPIO_PIN_9;
  GPIO_Init(GPIOA, &GPIO_InitStruct);
  GPIO_AltFuncConfig(GPIOA, GPIO_PIN_9 , GPIO_ALT_FUNC_1);
}

/**
 *******************************************************************************
 * @brief   UART Config.
 * @param   None.
 * @retval  None.
 ******************************************************************************/
void UART_ConfigInit(void)
{
  /* Enable clock */
  RCC_Unlock();
  RCC_APBPeriphClockCmd(RCC_APB_PERIPH_UART0, ENABLE);
  RCC_Lock();

  /* UART configure */
  UART_DeInit(UART0);
  UART_InitTypeStruct UART_InitStruct;
  UART_StructInit(&UART_InitStruct);
  UART_InitStruct.UART_BaudRate = 115200;
  UART_InitStruct.UART_DataLen = UART_DATA_LEN_8;
  UART_InitStruct.UART_StopBits = UART_STOP_BITS_1;
  UART_InitStruct.UART_Parity = UART_PARITY_NO;
  UART_InitStruct.UART_Mode = UART_MODE_RX_TX;
  UART_Init(UART0, &UART_InitStruct);
  
  /* Enable HalfDuplex */
  UART_HalfDuplexCmd(UART0, ENABLE);
  
  /* Enable IQR */  
  NVIC_EnableIRQ(UART0_IRQn);  
  NVIC_SetPriority(UART0_IRQn, 2);
  UART_IntCmd(UART0, UART_INT_RXNE_IE, ENABLE);  
  
  /* Enable Uart */
  UART_Cmd(UART0, ENABLE);
}

/**
 *******************************************************************************
 * @brief   Send a string (half duplex) via UART0.
 * @param   str : The string to send .
 * @retval  None.
 ******************************************************************************/
void UART_SendString(char *str)
{
    while(*str)
    {
        while(UART_GetIntFlagStatus(UART0, UART_INT_FLAG_TXE) == RESET);
        UART_SendData(UART0, (uint16_t)(*str++));
    }
    while(UART_GetIntFlagStatus(UART0, UART_INT_FLAG_TXC) == RESET);
    UART_ClearIntFlag(UART0, UART_INT_FLAG_TXC);
}

/**
 *******************************************************************************
 * @brief   UART HalfDuplex Sample.
 * @param   None.
 * @retval  None.
 ******************************************************************************/
void UART_HalfDuplex_Sample(void)
{
  /* Send data */
  UART_SendString("UART Half-Duplex Demo\r\n");
  DelayMs(2000);
  /* Receive data */
  if (g_rx_flag)
  {
      g_rx_flag = 0;
      /* Send received bytes */
      while(UART_GetIntFlagStatus(UART0, UART_INT_FLAG_TXE) == RESET);
      UART_SendData(UART0, (uint16_t)g_rx_byte);
      while(UART_GetIntFlagStatus(UART0, UART_INT_FLAG_TXC) == RESET);
      UART_ClearIntFlag(UART0, UART_INT_FLAG_TXC);
  }
}



/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT DP *****END OF FILE ***************************/
