/**
* @brief How to make a write followed by a read in the E²PROM.
* @par Examples description
* - Write 8 bytes on the devive (E²PROM) 0xA0.
* - Read back the 8 bytes written on the devive (E²PROM) 0xA0.
* - Check the coherency between the written and read Data.
* @par Parameters:
* None
* @retval
* None
*/
void main()
{
/* Initialize I/Os in Output Mode */
GPIO_Init(LEDS_PORT, (LED1_PIN | LED2_PIN | LED3_PIN | LED4_PIN), GPIO_MODE_OUT_PP_LOW_FAST);
/* Optional: put here as example only */
I2C_DeInit();
/* Initialize the I2C */
I2C_EEInit();
/* All LEDs are ON per default */
GPIO_WriteLow(LEDS_PORT, (LED1_PIN | LED2_PIN | LED3_PIN | LED4_PIN));
/*** WRITE SEQUENCE ***/
I2C_EE_PageWrite(Buffer, Base_Add, Buffer_size);
Delay(1000); /* To let eeprom the time to finish the write operation */
/*** READ SEQUENCE ***/
I2C_EE_BufferRead(Data, Base_Add, Buffer_size);
/*** Check transmitted and received buffers ***/
for (i =Buffer_size; i > 0; i--)
{
if (Buffer[i-1] != Data[i-1])
{
/* Toggle only LED1 if error is detected */
while (1)
{
GPIO_WriteReverse(LEDS_PORT, LED1_PIN);
Delay((u16)60000);
}
}
}
/* Toggle all LEDs when I2C communication is terminated and buffers are ok */
while (1)
{
GPIO_WriteReverse(LEDS_PORT, (LED2_PIN | LED3_PIN | LED4_PIN));
Delay((u16)60000);
}
}
/**
* @brief 将缓冲区中的数据写到I2C EEPROM中
* @param
* @arg pBuffer:缓冲区指针
* @arg WriteAddr:写地址
* @arg NumByteToWrite:写的字节数
* @retval 无
*/
void I2C_EE_BufferWrite(uint8_t* pBuffer, uint8_t WriteAddr, uint16_t NumByteToWrite)
{
uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
Addr = WriteAddr % I2C_PageSize;
count = I2C_PageSize - Addr;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
/* If WriteAddr is I2C_PageSize aligned */
if(Addr == 0)
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage == 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
/* If NumByteToWrite > I2C_PageSize */
else
{
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
HAL_Delay(8);
}
if(NumOfSingle!=0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
}
/* If WriteAddr is not I2C_PageSize aligned */
else
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage== 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
/* If NumByteToWrite > I2C_PageSize */
else
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
if(count != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, count);
WriteAddr += count;
pBuffer += count;
HAL_Delay(8);
}
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
HAL_Delay(8);
}
if(NumOfSingle != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
}
}
/*******************************************************************************
* Function Name : I2C_EE_BufferWrite
* Description : Writes buffer of data to the I2C EEPROM.
* Input : - pBuffer : pointer to the buffer containing the data to be
* written to the EEPROM.
* - WriteAddr : EEPROM's internal address to write to.
* - NumByteToWrite : number of bytes to write to the EEPROM.
* Output : None
* Return : None
*******************************************************************************/
void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)
{
u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
Addr = WriteAddr % I2C_PageSize;
count = I2C_PageSize - Addr;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
/* If WriteAddr is I2C_PageSize aligned */
if(Addr == 0)
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage == 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
/* If NumByteToWrite > I2C_PageSize */
else
{
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle!=0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
/* If WriteAddr is not I2C_PageSize aligned */
else
{
/* If NumByteToWrite < I2C_PageSize */
if(NumOfPage== 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
/* If NumByteToWrite > I2C_PageSize */
else
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / I2C_PageSize;
NumOfSingle = NumByteToWrite % I2C_PageSize;
if(count != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, count);
I2C_EE_WaitEepromStandbyState();
WriteAddr += count;
pBuffer += count;
}
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_PageSize;
pBuffer += I2C_PageSize;
}
if(NumOfSingle != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
}
/**
* @brief Writes buffer of data to the I2C EEPROM.
* @param pBuffer : pointer to the buffer containing the data to be
* written to the EEPROM.
* @param WriteAddr : EEPROM's internal address to write to.
* @param NumByteToWrite : number of bytes to write to the EEPROM.
* @retval None
*/
static void I2C_EE_BufferWrite(uint8_t* pBuffer, uint16_t WriteAddr, uint16_t NumByteToWrite)
{
uint8_t NumOfPage = 0, NumOfSingle = 0, count = 0;
uint16_t Addr = 0;
Addr = WriteAddr % I2C_FLASH_PAGESIZE;
count = I2C_FLASH_PAGESIZE - Addr;
NumOfPage = NumByteToWrite / I2C_FLASH_PAGESIZE;
NumOfSingle = NumByteToWrite % I2C_FLASH_PAGESIZE;
/* If WriteAddr is I2C_FLASH_PAGESIZE aligned */
if(Addr == 0)
{
/* If NumByteToWrite < I2C_FLASH_PAGESIZE */
if(NumOfPage == 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
/* If NumByteToWrite > I2C_FLASH_PAGESIZE */
else
{
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_FLASH_PAGESIZE);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_FLASH_PAGESIZE;
pBuffer += I2C_FLASH_PAGESIZE;
}
if(NumOfSingle!=0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
/* If WriteAddr is not I2C_FLASH_PAGESIZE aligned */
else
{
/* If NumByteToWrite < I2C_FLASH_PAGESIZE */
if(NumOfPage== 0)
{
/* If the number of data to be written is more than the remaining space
in the current page: */
if (NumByteToWrite > count)
{
/* Write the data conained in same page */
I2C_EE_PageWrite(pBuffer, WriteAddr, count);
I2C_EE_WaitEepromStandbyState();
/* Write the remaining data in the following page */
I2C_EE_PageWrite((uint8_t*)(pBuffer + count), (WriteAddr + count), (NumByteToWrite - count));
I2C_EE_WaitEepromStandbyState();
}
else
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
/* If NumByteToWrite > I2C_FLASH_PAGESIZE */
else
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / I2C_FLASH_PAGESIZE;
NumOfSingle = NumByteToWrite % I2C_FLASH_PAGESIZE;
if(count != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, count);
I2C_EE_WaitEepromStandbyState();
WriteAddr += count;
pBuffer += count;
}
while(NumOfPage--)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_FLASH_PAGESIZE);
I2C_EE_WaitEepromStandbyState();
WriteAddr += I2C_FLASH_PAGESIZE;
pBuffer += I2C_FLASH_PAGESIZE;
}
if(NumOfSingle != 0)
{
I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
I2C_EE_WaitEepromStandbyState();
}
}
}
}
