/***********************************************************************
module : [EEPROM]
function : [EEPROM读]
return : [0:读取成功
-1:读取失败]
comment : [全局普通函数]
machine : [EH-0818]
language : [CHN]
keyword : [EEPROM]
date : [11/07/27]
author : [chen-zhengkai]
************************************************************************/
char eeprom_read(unsigned char* readBuffer, unsigned short sizelen, int romOffset)
{
unsigned short idx = 0;
char ret = 0;
EEPROM_Init(EEPROM_ON);
for (idx = 0; idx < sizelen; idx++) {
if (EEPROM_Read_Byte(idx+romOffset, &readBuffer[idx])) { //读取失败
ret = -1; //读取失败
break;
}
}
EEPROM_Init(EEPROM_OFF);
return ret;
}
/* ----------------------------------------------------------------------------
* Function : void EEPROM_Read(uint32_t spi_interface,
* uint16_t address,
* uint8_t* buffer,
* uint32_t byte_count)
* ----------------------------------------------------------------------------
* Description : Read a number of bytes starting at an address
* Inputs : - spi_interface - Index of SPI interface; use 0, 1
* - address - EEPROM address
* - buffer - Memory to transfer read data
* - byte_count - Number of bytes to read
* Outputs : None
* Assumptions : byte_count is less than the buffer size
* ------------------------------------------------------------------------- */
void EEPROM_Read(uint32_t spi_interface,
uint16_t address,
uint8_t* buffer,
uint32_t byte_count)
{
/* Check if SPI interface exists. If interface is invalid, return. */
if(spi_interface > (EEPROM_SPI_NUM_INTERFACE - 1))
{
return;
}
EEPROM_Read_Init(spi_interface, address);
for( ; byte_count > 0; byte_count--)
{
*buffer = EEPROM_Read_Byte(spi_interface);
buffer++;
}
EEPROM_Read_Done(spi_interface);
}
/* ----------------------------------------------------------------------------
* Function : uint32_t EEPROM_Read_Word(uint32_t spi_interface)
* ----------------------------------------------------------------------------
* Description : Read a 32-bit word from the EEPROM
* Inputs : spi_interface - Index of SPI interface; use 0, 1
* Outputs : data - Word read (return 0xFFFFFFFF if the
* specified SPI interface is invalid)
* Assumptions : - EEPROM is initialized to an address
* - EEPROM is selected by chip select
* ------------------------------------------------------------------------- */
uint32_t EEPROM_Read_Word(uint32_t spi_interface)
{
uint32_t i;
uint32_t data = 0;
/* Check if SPI interface exists. If interface is invalid, return
* 0xFFFFFFFF. */
if(spi_interface > (EEPROM_SPI_NUM_INTERFACE - 1))
{
return 0xFFFFFFFF;
}
for (i = 0; i < 4; i++)
{
((uint8_t *)&data)[i] = EEPROM_Read_Byte(spi_interface);
}
return data;
/* NOTE: Chip select is left low. */
}