/***********************************************************************
module : [EEPROM]
function : [EEPROM写]
return : [0:写入成功
-1:写入失败]
comment : [全局普通函数]
machine : [EH-0818]
language : [CHN]
keyword : [EEPROM]
date : [11/07/27]
author : [chen-zhengkai]
************************************************************************/
char eeprom_write(unsigned char* writeBuffer, unsigned short sizeLen, int romOffset)
{
unsigned short idx = 0;
char ret = 0;
EEPROM_Init(EEPROM_ON);
for (idx = 0; idx < sizeLen; idx++) {
if (EEPROM_Write_Byte(idx+romOffset, writeBuffer[idx])) { //写入失败
ret = -1; //写入失败
break;
}
}
EEPROM_Init(EEPROM_OFF);
return ret;
}
/* ----------------------------------------------------------------------------
* Function : void EEPROM_Write_Word(uint32_t spi_interface,
* uint32_t data)
* ----------------------------------------------------------------------------
* Description : Write a 32-bit word to the EEPROM
* Inputs : - spi_interface - Index of SPI interface; use 0, 1
* - data - Word to write
* Outputs : None
* Assumptions : - EEPROM is initialized to an address
* - Current EEPROM address is outside write protected blocks
* - EEPROM is selected by chip select
* ------------------------------------------------------------------------- */
void EEPROM_Write_Word(uint32_t spi_interface, uint32_t data)
{
uint32_t i;
/* Check if SPI interface exists. If interface is invalid, return. */
if(spi_interface > (EEPROM_SPI_NUM_INTERFACE - 1))
{
return;
}
for (i = 0; i < 4; i++)
{
EEPROM_Write_Byte(spi_interface, ((uint8_t *)&data)[i]);
}
/* NOTE: Chip select is left low. */
}
/* ----------------------------------------------------------------------------
* Function : void EEPROM_Write(uint32_t spi_interface,
* uint16_t address,
* uint8_t* buffer,
* uint32_t byte_count)
* ----------------------------------------------------------------------------
* Description : Write a number of bytes starting at an address
* Inputs : - spi_interface - Index of SPI interface; use 0, 1
* - address - EEPROM address
* - buffer - Data to write to EEPROM
* - byte_count - Number of bytes to write
* Outputs : None
* Assumptions : - byte_count is less than the buffer size
* - Write-enable opcode is set
* - Block of data to be written is outside write protected
* blocks
* ------------------------------------------------------------------------- */
void EEPROM_Write(uint32_t spi_interface,
uint16_t address,
uint8_t* buffer,
uint32_t byte_count)
{
uint16_t page_address;
/* Check if SPI interface exists. If interface is invalid, return. */
if(spi_interface > (EEPROM_SPI_NUM_INTERFACE - 1))
{
return;
}
page_address = (address & EEPROM_PAGE_ADDRESS_Mask);
while(byte_count > 0)
{
/* Set page_address to the end of current page */
page_address += EEPROM_PAGE_LENGTH;
EEPROM_Write_Enable(spi_interface);
EEPROM_Write_Init(spi_interface, address);
/* Write bytes until either byte_count is zero or writing past a
* page. When writing past a page, commit to memory before
* proceeding. */
while((address != page_address) && (byte_count > 0))
{
EEPROM_Write_Byte(spi_interface, *buffer);
buffer++;
address++;
byte_count--;
}
EEPROM_Write_Done(spi_interface);
}
}
