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SPI Flash Devices
[Device Driver API.]

Programs SPI attached flash devices. More...

Functions
int	SpiFlashEnable (void)
	Enable SPI device flash programming.
void	SpiFlashId (u_char *id)
int	SpiFlashWriteByte (u_char high, u_short addr, u_char data)
	Write byte to the target's flash memory.
int	SpiFlashWriteWord (u_short addr, u_short data)
	Write word to the target's flash memory.
void	SpiFlashErase (void)
	Erase target's flash memory.

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Detailed Description

Programs SPI attached flash devices.

When AVR CPUs are attached to the SPI, then the routines in this module can be used to write to the flash ROM of these devices.

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Function Documentation

int SpiFlashEnable (  void    )

Enable SPI device flash programming. Returns: 0 if device could be located, -1 otherwise.

void SpiFlashErase (  void    )

Erase target's flash memory. Sets all bytes on the target's flash memory to 0xFF. In addtion all lock bits are set to 1 (unprogrammed).

void SpiFlashId (  u_char *    id )

Read SPI device ID. Parameters: id  Three byte character array, which receives the CPU ID.

int SpiFlashWriteByte (  u_char    high, u_short    addr, u_char    data )

Write byte to the target's flash memory. The target must have been erased by a previous call to SpiFlashErase(). Parameters: high  Must be 0 to write the low byte or 8 to write the high byte. addr  Word address to write to. data  Byte value to write. Returns: 0 on success, -1 otherwise.

int SpiFlashWriteWord (  u_short    addr, u_short    data )

Write word to the target's flash memory. Parameters: addr  Word address to write to. data  Word value to write. Returns: 0 on success, -1 otherwise.

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