main.c

STM32 库文件

/**
  ******************************************************************************
  * @file USART/IrDA/Transmit/main.c 
  * @author  MCD Application Team
  * @version  V3.0.0
  * @date  04/06/2009
  * @brief  Main program body
  ******************************************************************************
  * @copy
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "platform_config.h"

/** @addtogroup StdPeriph_Examples
  * @{
  */

/** @addtogroup USART_IrDA_Transmit
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define  NOKEY  0
#define  SEL    1
#define  RIGHT  2
#define  LEFT   3
#define  UP     4
#define  DOWN   5

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;
uint8_t MyKey = 0;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
uint8_t ReadKey(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();

  /* Configure the GPIO ports */
  GPIO_Configuration();

/* USART3 configuration ------------------------------------------------------*/
  /* USART3 configured as follow:
        - BaudRate = 115200 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  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_Rx | USART_Mode_Tx;

  /* Configure the USART3 */
  USART_Init(USART3, &USART_InitStructure);
  /* Enable the USART3 */
  USART_Cmd(USART3, ENABLE);
  /* Set the USART3 prescaler */
  USART_SetPrescaler(USART3, 0x1);
  /* Configure the USART3 IrDA mode */
  USART_IrDAConfig(USART3, USART_IrDAMode_Normal);

  /* Enable the USART3 IrDA mode */
  USART_IrDACmd(USART3, ENABLE);


  while (1)
  {
    /* Read Key */
    MyKey = ReadKey();

    switch(MyKey)
    {
      case UP:
        USART_SendData(USART3, UP);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        }
        break;
      case DOWN:
        USART_SendData(USART3, DOWN);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        }
        break;
      case LEFT:
        USART_SendData(USART3, LEFT);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        }
        break;
      case RIGHT:
        USART_SendData(USART3, RIGHT);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        }
        break;
      case SEL:
        USART_SendData(USART3, SEL);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        }
        break;
      case NOKEY:
        USART_SendData(USART3, NOKEY);
        while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET)
        {
        } 
        break;
      default:
        break;
    }
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,  
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();
  
  /* Enable GPIOC, GPIO Right Button, GPIO Left Button, GPIO UP Button
     GPIO DOWN Button, GPIO SEL Button and AFIO clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIO_RIGHT_BUTTON
                         | RCC_APB2Periph_GPIO_LEFT_BUTTON | RCC_APB2Periph_GPIO_UP_BUTTON
                         |RCC_APB2Periph_GPIO_DOWN_BUTTON | RCC_APB2Periph_GPIO_SEL_BUTTON
                         | RCC_APB2Periph_AFIO, ENABLE);
  /* Enable USART3 clocks */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
}

/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval : None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure the USART3 Software Pins remapping */
  GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);

  /* Configure USART3 Tx (PC.10)as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  /* Configure USART3 Rx PC.11 as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  /* Configure GPIO RIGHT Button Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_RIGHT_BUTTON;
  GPIO_Init(GPIO_RIGHT_BUTTON, &GPIO_InitStructure);

  /* Configure GPIO LEFT Button Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_LEFT_BUTTON;
  GPIO_Init(GPIO_LEFT_BUTTON, &GPIO_InitStructure);

  /* Configure GPIO UP Button Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_UP_BUTTON;
  GPIO_Init(GPIO_UP_BUTTON, &GPIO_InitStructure);

  /* Configure GPIO DOWN Button Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_DOWN_BUTTON;
  GPIO_Init(GPIO_DOWN_BUTTON, &GPIO_InitStructure);

  /* Configure GPIO SEL Button Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_SEL_BUTTON;
  GPIO_Init(GPIO_SEL_BUTTON, &GPIO_InitStructure);
}

/**
  * @brief  Reads key from demoboard.
  * @param  None
  * @retval : Return RIGHT, LEFT, SEL, UP, DOWN or NOKEY
  */
uint8_t ReadKey(void)
{
  /* "right" key is pressed */
  if(!GPIO_ReadInputDataBit(GPIO_RIGHT_BUTTON, GPIO_PIN_RIGHT_BUTTON))
  {
    while(GPIO_ReadInputDataBit(GPIO_RIGHT_BUTTON, GPIO_PIN_RIGHT_BUTTON) == Bit_RESET);
    return RIGHT; 
  }
  /* "left" key is pressed */
  if(!GPIO_ReadInputDataBit(GPIO_LEFT_BUTTON, GPIO_PIN_LEFT_BUTTON))
  {
    while(GPIO_ReadInputDataBit(GPIO_LEFT_BUTTON, GPIO_PIN_LEFT_BUTTON) == Bit_RESET);
    return LEFT; 
  }
  /* "up" key is pressed */
  if(!GPIO_ReadInputDataBit(GPIO_UP_BUTTON, GPIO_PIN_UP_BUTTON))
  {
    while(GPIO_ReadInputDataBit(GPIO_UP_BUTTON, GPIO_PIN_UP_BUTTON) == Bit_RESET);
    return UP; 
  }
  /* "down" key is pressed */
  if(!GPIO_ReadInputDataBit(GPIO_DOWN_BUTTON, GPIO_PIN_DOWN_BUTTON))
  {
    while(GPIO_ReadInputDataBit(GPIO_DOWN_BUTTON, GPIO_PIN_DOWN_BUTTON) == Bit_RESET);
    return DOWN; 
  }
  /* "sel" key is pressed */
  if(!GPIO_ReadInputDataBit(GPIO_SEL_BUTTON, GPIO_PIN_SEL_BUTTON))
  {
    while(GPIO_ReadInputDataBit(GPIO_SEL_BUTTON, GPIO_PIN_SEL_BUTTON) == Bit_RESET);
    return SEL; 
  }
  /* No key is pressed */
  else 
  {
    return NOKEY;
  }
}

#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param file: pointer to the source file name
  * @param line: assert_param error line source number
  * @retval : None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */ 

/**
  * @}
  */ 

/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/