main.c

STM32 库文件

/**
  ******************************************************************************
  * @file USART/MultiProcessor/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_MultiProcessor
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void EXTI_Configuration(void);
void NVIC_Configuration(void);
void Delay(__IO uint32_t nCount);

/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
       
  /* NVIC configuration */
  NVIC_Configuration();

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

  /* Configure the EXTI Controller */
  EXTI_Configuration();

/* USART1 and USART2 configuration -------------------------------------------*/
  /* USART and USART2 configured as follow:
        - BaudRate = 9600 baud  
        - Word Length = 9 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = 9600;
  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_Rx | USART_Mode_Tx;
  
  /* Configure USART1 */
  USART_Init(USART1, &USART_InitStructure);
  /* Configure USART2 */
  USART_Init(USART2, &USART_InitStructure);
  
  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
  /* Enable the USART2 */
  USART_Cmd(USART2, ENABLE);

  /* Set the USART1 Address */
  USART_SetAddress(USART1, 0x1);
  /* Set the USART2 Address */
  USART_SetAddress(USART2, 0x2);

  /* Select the USART2 WakeUp Method */
  USART_WakeUpConfig(USART2, USART_WakeUp_AddressMark);
  
  while (1)
  {
    /* Send one byte from USART1 to USART 2 */
    USART_SendData(USART1, 0x33);
    /* Wait while USART1 TXE = 0 */
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
    {
    }
    if(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) != RESET)
    {
      if(USART_ReceiveData(USART2) == 0x33)
      {
        GPIO_WriteBit(GPIO_LED, GPIO_Pin_6, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIO_LED, GPIO_Pin_6)));
        Delay(0x5FFFF);
        GPIO_WriteBit(GPIO_LED, GPIO_Pin_7, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIO_LED, GPIO_Pin_7)));
        Delay(0x5FFFF);
        GPIO_WriteBit(GPIO_LED, GPIO_Pin_8, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIO_LED, GPIO_Pin_8)));
        Delay(0x5FFFF);
        GPIO_WriteBit(GPIO_LED, GPIO_Pin_9, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIO_LED, GPIO_Pin_9)));
        Delay(0x5FFFF);
      }
    }
  }
}

/**
  * @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 USART1, GPIOA, GPIO_KEY_BUTTON, GPIO_LED, GPIOx and AFIO clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |
                         RCC_APB2Periph_GPIO_KEY_BUTTON | RCC_APB2Periph_GPIO_LED |
                         RCC_APB2Periph_GPIOx | RCC_APB2Periph_AFIO, ENABLE);
  /* Enable USART2 clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}

/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval : None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
 
#ifdef USE_STM3210B_EVAL 
  /* Enable the USART2 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#endif

  /* Configure GPIO_LED Pin 6, GPIO_LED Pin 7, GPIO_LED Pin 8 and GPIO_LED Pin 9 as output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIO_LED, &GPIO_InitStructure);

  /* Configure USART1 Tx (PA.09) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART2 Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_TxPin;
  GPIO_Init(GPIOx, &GPIO_InitStructure);

  /* Configure USART1 Rx (PA.10) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure USART2 Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_RxPin;
  GPIO_Init(GPIOx, &GPIO_InitStructure);

  /* Configure PA.00 as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure Key Button GPIO Pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_PIN_KEY_BUTTON;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIO_KEY_BUTTON, &GPIO_InitStructure);
}

/**
  * @brief  Configures the External Interrupts controller.
  * @param  None
  * @retval : None
  */
void EXTI_Configuration(void)
{
  EXTI_InitTypeDef EXTI_InitStructure;

  /* Connect Key Button EXTI Line to Key Button GPIO Pin */
  GPIO_EXTILineConfig(GPIO_PORT_SOURCE_KEY_BUTTON, GPIO_PIN_SOURCE_KEY_BUTTON);

  /* Configure Key Button EXTI Line to generate an interrupt on falling edge */  
  EXTI_InitStructure.EXTI_Line = EXTI_LINE_KEY_BUTTON;  
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Connect EXTI Line0 to PA.00 */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
  /* Configure EXTI Line0 to generate an interrupt on rising edge */  
  EXTI_InitStructure.EXTI_Line = EXTI_Line0;  
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_Init(&EXTI_InitStructure);
}

/**
  * @brief  Configures the nested vectored interrupt controller.
  * @param  None
  * @retval : None
  */
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure the NVIC Preemption Priority Bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  
  /* Enable the Key Button EXTI Line Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Enable the EXTI Line 0 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_Init(&NVIC_InitStructure);
}

/**
  * @brief  Inserts a delay time.
  * @param nCount: specifies the delay time length.
  * @retval : None
  */
void Delay(__IO uint32_t nCount)
{
  /* Decrement nCount value */
  for(; nCount != 0; nCount--);
}

#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****/