main.c

STM32 库文件

/**
  ******************************************************************************
  * @file CAN/Normal/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 CAN_Normal
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

/* Private define ------------------------------------------------------------*/
#define Key_Pressed 0x01
#define Key_NoPressed 0x00

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
CAN_InitTypeDef        CAN_InitStructure;
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
CanTxMsg TxMessage;
uint8_t Key_Pressed_Number = 0x0;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);  
void CAN_Config(void);
void LED_Display(uint8_t Ledstatus);
void Init_RxMes(CanRxMsg *RxMessage);
uint8_t Key_Status(void);
  
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
 uint32_t i=0;
  
  /* System clocks configuration ---------------------------------------------*/
  RCC_Configuration();

  /* NVIC configuration ------------------------------------------------------*/
  NVIC_Configuration();

  /* GPIO configuration ------------------------------------------------------*/
  GPIO_Configuration();

  /* CAN configuration */
  CAN_Config();

  CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);

  /* turn off all leds*/
  LED_Display(5);

  /* Infinite loop*/
  while(1)
  {
    while(Key_Status()== Key_Pressed)
     {
	if(Key_Pressed_Number==0x4) 
        {
	   Key_Pressed_Number = 0x00;
        }
	else
        {
       	  LED_Display(++Key_Pressed_Number);
          TxMessage.Data[0] = Key_Pressed_Number;
          CAN_Transmit(CAN1, &TxMessage);
	  for(i=0;i<0xFFFF;i++);
          while(Key_Status()!= Key_NoPressed);
        }
     }
  }
}

/**
  * @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. */
  /* The System frequency should be set to HSE frequency */
  SystemInit();
  
  /* GPIO clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIO_CAN |RCC_APB2Periph_GPIO_LED | RCC_APB2Periph_GPIO_Key , ENABLE);

  /* CAN1 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
  
}

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

  /* Configure GPIO_LED pin6, pin7, pin8 and pin9 as Output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIO_LED, &GPIO_InitStructure);

  /* Configure CAN pin: RX */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_RX;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIO_CAN, &GPIO_InitStructure);
  
  /* Configure CAN pin: TX */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_TX;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIO_CAN, &GPIO_InitStructure);
  
  GPIO_PinRemapConfig(GPIO_Remap_CAN , ENABLE);

  /* (key button) as output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_Key ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIO_Key, &GPIO_InitStructure);
}

/**
  * @brief  Configures the NVIC for CAN and joystick
  * @param  None
  * @retval : None
  */
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef  NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  
  NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

/**
  * @brief  check if joystick is pressed or not
  * @param  None
  * @retval :   
  *   1: if Up is pressed    
  *   2: if Down is pressed
  *   3: if Left is pressed
  *   4: if Right is pressed
  */
uint8_t Key_Status(void)
{
  if((GPIO_ReadInputDataBit(GPIO_Key, GPIO_Pin_Key))== 0)
    return (Key_Pressed);
  else
    return (Key_NoPressed);
}

/**
  * @brief  Turn ON/OFF the dedicate led
  * @param Ledstatus: Led number from 0 to 3 
  * @retval : None
  */
void LED_Display(uint8_t Ledstatus)
{
  /* turn off all leds*/
  GPIO_WriteBit(GPIO_LED, GPIO_Pin_6, Bit_RESET);
  GPIO_WriteBit(GPIO_LED, GPIO_Pin_7, Bit_RESET);
  GPIO_WriteBit(GPIO_LED, GPIO_Pin_8, Bit_RESET);
  GPIO_WriteBit(GPIO_LED, GPIO_Pin_9, Bit_RESET);
  
  switch(Ledstatus)
  {
   case(1): GPIO_WriteBit(GPIO_LED, GPIO_Pin_6, Bit_SET);
            break;
   
   case(2): GPIO_WriteBit(GPIO_LED, GPIO_Pin_7, Bit_SET);
            break;
 
   case(3): GPIO_WriteBit(GPIO_LED, GPIO_Pin_8, Bit_SET);
            break;

   case(4): GPIO_WriteBit(GPIO_LED, GPIO_Pin_9, Bit_SET);
            break;
  default:
        break;
   }
}

/**
  * @brief  Configures the CAN.
  * @param  None
  * @retval : None
  */
void CAN_Config(void)
{
  /* CAN register init */
  CAN_DeInit(CAN1);
  CAN_StructInit(&CAN_InitStructure);

  /* CAN cell init */
  CAN_InitStructure.CAN_TTCM = DISABLE;
  CAN_InitStructure.CAN_ABOM = DISABLE;
  CAN_InitStructure.CAN_AWUM = DISABLE;
  CAN_InitStructure.CAN_NART = DISABLE;
  CAN_InitStructure.CAN_RFLM = DISABLE;
  CAN_InitStructure.CAN_TXFP = DISABLE;
  CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
  CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
  CAN_InitStructure.CAN_BS1 = CAN_BS1_10tq;
  CAN_InitStructure.CAN_BS2 = CAN_BS2_7tq;
  CAN_InitStructure.CAN_Prescaler = 2;
  CAN_Init(CAN1, &CAN_InitStructure);

  /* CAN filter init */
 /* CAN filter init */
  CAN_FilterInitStructure.CAN_FilterNumber=0;
  CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment=0;
  CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);
  
   /* transmit */
  TxMessage.StdId = 0x321;
  TxMessage.ExtId = 0x01;
  TxMessage.RTR = CAN_RTR_DATA;
  TxMessage.IDE = CAN_ID_STD;
  TxMessage.DLC = 1;
  
}

/**
  * @brief  Initializes a Rx Message.
  * @param CanRxMsg *RxMessage
  * @retval : None
  */
void Init_RxMes(CanRxMsg *RxMessage)
{
  uint8_t i = 0;

  RxMessage->StdId = 0x00;
  RxMessage->ExtId = 0x00;
  RxMessage->IDE = CAN_ID_STD;
  RxMessage->DLC = 0;
  RxMessage->FMI = 0;
  for (i = 0;i < 8;i++)
    RxMessage->Data[i] = 0x00;
}

#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****/