main.c

STM32 I2C 模拟

#include "main.h"


/* Private define ------------------------------------------------------------*/
#define EEPROM_WriteAddress1    0x00
#define EEPROM_ReadAddress1     0x00
#define BufferSize1             (countof(Tx1_Buffer)-1)

/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))

/* Private variables ---------------------------------------------------------*/
u8 Tx1_Buffer[] = "123456789abcdef";
u8 Rx1_Buffer[BufferSize1] = "";

/* Private variables ---------------------------------------------------------*/
static volatile ErrorStatus HSEStartUpStatus = SUCCESS;
static vu32 SELStatus = 0;
static vu32 TimingDelay = 0;	 
static vu32 I2C_Delay = 0;

volatile bool I2C_Time_out;
extern void SetupUSART(void);
	 
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif


    RCC_Configuration();
    InterruptConfig();
    SysTick_Config();
	SetupUSART();
    STM3210E_LCD_Init();
	I2C_GPIO_Config();
	
	LCD_Clear(White);
	LCD_SetBackColor(White);
	LCD_SetTextColor(Blue);
	LCD_DisplayStringLine(Line0,"ceshi 24c02");
	printf("I2C CESHI\t\t\n");

	//I2C_WriteByte(Tx1_Buffer[1], 0x0000, 0xa0)
	I2C_PageWrite(Tx1_Buffer,BufferSize1,EEPROM_WriteAddress1,0xa0);
	  
	Systick_Delay_1ms(10);
	I2C_ReadByte(Rx1_Buffer,BufferSize1,0x00 ,0xa0);
	
	printf(" Rx1_Buffer is:%s,\t the BufferSize1 is%d\n",Rx1_Buffer,BufferSize1);
  while(1)
  {
  }
}


/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/   
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();

  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
    
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 
 
    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);
 
    /* PLLCLK = 8MHz * 9 = 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
 
    /* Enable PLL */ 
    RCC_PLLCmd(ENABLE);
 
    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }
 
    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
 
    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }

  /* Enable GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB , ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD , ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOF , ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOG | RCC_APB2Periph_AFIO  , ENABLE);
}

/*******************************************************************************
* Function Name  : InterruptConfig
* Description    : Configures the used IRQ Channels and sets their priority.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void InterruptConfig(void)
{ 
  /* Deinitializes the NVIC */
  NVIC_DeInit();

  /* Set the Vector Table base address at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x00);

	/* Configure the Priority Group to 2 bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

	/* Configure the SysTick handler priority */
  NVIC_SystemHandlerPriorityConfig(SystemHandler_SysTick, 0, 0);

}


/*******************************************************************************
* Function Name  : SysTick_Config
* Description    : Configure a SysTick Base time to 10 ms.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SysTick_Config(void)
{
  /* Configure HCLK clock as SysTick clock source */
  SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
 
  /* SysTick interrupt each 1000 Hz with HCLK equal to 72MHz */
  SysTick_SetReload(72000);

  /* Enable the SysTick Interrupt */
  SysTick_ITConfig(ENABLE);

	/* Enable the SysTick Counter */
  SysTick_CounterCmd(SysTick_Counter_Enable);
}

void systick_isr(void)
{
  if (TimingDelay != 0x00)
  {
    TimingDelay--;
  }
	if (I2C_Delay != 0x00)
  {
    I2C_Delay--;
  }
	else 
	{
	  I2C_Time_out = TRUE;
	}


}
/*******************************************************************************
* Function Name  : Delay
* Description    : Inserts a delay time.
* Input          : nCount: specifies the delay time length (time base 1 ms).
* Output         : None
* Return         : None
*******************************************************************************/
void Systick_Delay_1ms(u32 nCount)
{
  TimingDelay = nCount;
  
  while(TimingDelay != 0)
	{}
}

void I2C_Delay_Out(u32 nCount)
{
    I2C_Delay = nCount;
	I2C_Time_out = FALSE;
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description:    : Reports the name of the source file and the source line number
*                  where the assert_param error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert_param error line source number
* Output         : None
* Return         : None
*******************************************************************************/
void assert_failed(u8* file, u32 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 2008 STMicroelectronics *****END OF FILE****/