main.c

STM32为ST公司最新推出的一款基于CORTEX内核的32位微处理器.STM32F10xFWLib.rar为其所有外设的SAMPLE CODE编译环境为IAR

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 05/21/2007
* Description        : Main program body
********************************************************************************
* History:
* 05/21/2007: V0.3
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "i2c_ee.h"

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

/* Private define ------------------------------------------------------------*/
#define EEPROM_WriteAddress1 0x5
#define EEPROM_ReadAddress1  0x5
#define BufferSize1 (countof(Tx1_Buffer)-1)
#define BufferSize2 (countof(Tx2_Buffer)-1)
#define EEPROM_WriteAddress2 (EEPROM_WriteAddress1 + BufferSize1)
#define EEPROM_ReadAddress2  (EEPROM_ReadAddress1 + BufferSize1)

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

/* Private variables ---------------------------------------------------------*/
u8 Tx1_Buffer[] = "/* STM32F10x I2C Firmware ";
u8 Tx2_Buffer[] = "Library Example */";
u8 Rx_Buffer[BufferSize1 + BufferSize2], Rx1_Buffer[BufferSize1], 
   Rx2_Buffer[BufferSize2];
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
ErrorStatus HSEStartUpStatus;
    
/* Private functions ---------------------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);

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

  /* System clocks configuration ---------------------------------------------*/
  RCC_Configuration();

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

  /* Initialize the I2C EEPROM driver ----------------------------------------*/
  I2C_EE_Init();  

  /* First write in the memory followed by a read of the written data --------*/
  /* Write on I2C EEPROM from EEPROM_WriteAddress1 */
  I2C_EE_BufferWrite(Tx1_Buffer, EEPROM_WriteAddress1, BufferSize1); 

  /* Read from I2C EEPROM from EEPROM_ReadAddress1 */
  I2C_EE_BufferRead(Rx1_Buffer, EEPROM_ReadAddress1, BufferSize1); 

  /* Check if the data written to the memory is read correctly */
  TransferStatus1 = Buffercmp(Tx1_Buffer, Rx1_Buffer, BufferSize1);
  /* TransferStatus1 = PASSED, if the transmitted and received data 
     to/from the EEPROM are the same */
  /* TransferStatus1 = FAILED, if the transmitted and received data 
     to/from the EEPROM are different */

  /* Wait for EEPROM standby state */
  I2C_EE_WaitEepromStandbyState();

  /* Second write in the memory followed by a read of the written data -------*/
  /* Write on I2C EEPROM from EEPROM_WriteAddress2 */
  I2C_EE_BufferWrite(Tx2_Buffer, EEPROM_WriteAddress2, BufferSize2); 

  /* Read from I2C EEPROM from EEPROM_ReadAddress2 */
  I2C_EE_BufferRead(Rx2_Buffer, EEPROM_ReadAddress2, BufferSize2);

  /* Check if the data written to the memory is read correctly */
  TransferStatus2 = Buffercmp(Tx2_Buffer, Rx2_Buffer, BufferSize2);
  /* TransferStatus2 = PASSED, if the transmitted and received data 
     to/from the EEPROM are the same */
  /* TransferStatus2 = FAILED, if the transmitted and received data 
     to/from the EEPROM are different */

  /* Wait for EEPROM standby state */
  I2C_EE_WaitEepromStandbyState();

  /* Read the hole written data on I2C EEPROM and store it in the Rx_Buffer 
     starting from address EEPROM_ReadAddress1 */
  I2C_EE_BufferRead(Rx_Buffer, EEPROM_ReadAddress1, BufferSize1 + BufferSize2);

  while(1)
  {
  }
}

/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* 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)
  {
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);
 
    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* 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 peripheral clocks --------------------------------------------------*/
  /* GPIOB Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
  /* I2C1 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
  /* Set the Vector Table base location at 0x08000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
}

/*******************************************************************************
* Function Name  : Buffercmp
* Description    : Compares two buffers.
* Input          : - pBuffer1, pBuffer2: buffers to be compared.
*                : - BufferLength: buffer's length
* Output         : None
* Return         : PASSED: pBuffer1 identical to pBuffer2
*                  FAILED: pBuffer1 differs from pBuffer2
*******************************************************************************/
TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength)
{
  while(BufferLength--)
  {
    if(*pBuffer1 != *pBuffer2)
    {
      return FAILED;
    }
    
    pBuffer1++;
    pBuffer2++;
  }

  return PASSED;  
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert 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 2007 STMicroelectronics *****END OF FILE****/