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Functional Overview
write_program_eeprom(address, value)
erase_program_eeprom(address)
Writes value to program memory location address.
Erases FLASH_ERASE_SIZE bytes in program memory.
write_program_memory(address,dataptr,count) Writes count bytes to program memory from dataptr to address.
When address is a mutiple of FLASH_ERASE_SIZE an erase i s
performed.
read_program_memory(address,dataptr,count) Read count bytes from program memory at address to dataptr.
Relevant Preprocessor:
#ROM address={list}
#DEVICE(WRITE_EEPROM=ASYNC)
Can be used to put program memory data into the hex file.
Can be used with #DEVICE to prevent the write function from
hanging. When this is used make sure the eeprom is not written
inside and outside the ISR.
Relevant Interrupts:
INT_EEPROM
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters
PROGRAM_MEMORY
READ_PROGRAM
FLASH_WRITE_SIZE
FLASH_ERASE_SIZE
Interrupt fires when eeprom write is complete.
Size of program memory
Returns 1 if program memory can be read
Smallest number of bytes written in flash
Smallest number of bytes erased in flash
Example Code:
For 18F452 where the write size is 8 bytes and erase size is 64 bytes
#rom 0xa00={1,2,3,4,5}
erase_program_eeprom(0x1000);
write_program_eeprom(0x1000,0x1234);
value=read_program_eeprom(0x1000);
write_program_memory(0x1000,data,8);
read_program_memory(0x1000,value,8);
erase_program_eeprom(0x1000);
write_program_memory(0x1010,data,8);
read_program_memory(0x1000,value,8);
//inserts this data into the hex file.
//erases 64 bytes strting at 0x1000
//writes 0x1234 to 0x1000
//reads 0x1000 returns 0x1234
//erases 64 bytes starting at 0x1000 as 0x1000 is a multiple
//of 64 and writes 8 bytes from data to 0x1000
//reads 8 bytes to value from 0x1000
//erases 64 bytes starting at 0x1000
//writes 8 bytes from data to 0x1000
//reads 8 bytes to value from 0x1000
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