main.c

str75x的软件库源代码

/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Date First Issued  : 07/17/2006
* Description        : Main program body
********************************************************************************
* History:
* 07/17/2006 : V1.0
********************************************************************************
* 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 "spi_ee.h"

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

/* Private define ------------------------------------------------------------*/
#define  EEPROM_WriteAddress  0x00
#define  EEPROM_ReadAddress   0x00
#define  BufferSize (countof(Tx_Buffer)-1)

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

/* Private variables ---------------------------------------------------------*/
u8 Tx_Buffer[] = "/* STR75x SPI Software Library Example */";
u8 Rx_Buffer[BufferSize];
TestStatus TransferStatus;
ErrorStatus OSC4MStartUpStatus;

/* Private functions ---------------------------------------------------------*/
void MRCC_Configuration(void);
TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);

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

  /* MRCC configuration */
  MRCC_Configuration();
    
  /* Initialize the SPI EEPROM driver */
  SPI_EE_Init();  

/* Perform a write to the EEPROM followed by a read of the written data ------*/
  /* Write the Tx_Buffer on SPI EEPROM Sector0 starting from address 0x0 */
  SPI_EE_BufferWrite(Tx_Buffer, EEPROM_WriteAddress, BufferSize); 

  /* Read the Rx_Buffer from SPI EEPROM Sector0 starting from address 0x0 */
  SPI_EE_BufferRead(Rx_Buffer, EEPROM_ReadAddress, BufferSize); 

  /* Check the received data with the send ones */
  TransferStatus = Buffercmp(Tx_Buffer, Rx_Buffer, BufferSize);
  /* TransferStatus = PASSED, if the data written/read to/from SPI EEPROM is correct */ 
  /* TransferStatus = FAILED, if the data written/read to/from SPI EEPROM is corrupted */ 

  while(1);
}

/*******************************************************************************
* Function Name  : MRCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void MRCC_Configuration(void)
{
  /* MRCC system reset(for debug purpose) */
  MRCC_DeInit();

  /* Wait for OSC4M start-up */
  OSC4MStartUpStatus = MRCC_WaitForOSC4MStartUp();

  if(OSC4MStartUpStatus == SUCCESS)
  {
    /* Set HCLK to 30MHz */
    MRCC_HCLKConfig(MRCC_CKSYS_Div2);

    /* Set CKTIM to 30MHz */
    MRCC_CKTIMConfig(MRCC_HCLK_Div1);

    /* Set PCLK to 30MHz */
    MRCC_PCLKConfig(MRCC_CKTIM_Div1);

    /* Set CKSYS to 60MHz */
    MRCC_CKSYSConfig(MRCC_CKSYS_OSC4MPLL, MRCC_PLL_Mul_15);
  }

  /* GPIO pins optimized for 3V3 operation */
  MRCC_IOVoltageRangeConfig(MRCC_IOVoltageRange_3V3); 
}

/*******************************************************************************
* 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;  
}

/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/