Read and write PIC EEPROM

More a little post-it than a post, I wanted to put somewhere the commands :

Using the eeprom is as simple as these two commands :

[code lang=”c”]EEPROM_READ(addr) EEPROM_WRITE(addr,value) [/code]

A little example (reading from the USART a value and putting it in the EEPROM address 0x00)

[code] while (!DataRdyUSART()); char data = ReadUSART(); EEPROM_WRITE(0x00,data); [/code]

Note that theses header are defined in the standard xc8 header which will include (or , …) or High Tech C headers if you come from the past :

[code lang=”c”] // MACROS for EEPROM Access /* macro versions of EEPROM read and write */ /* NOTE WELL: EEPROM_READ() is NOT safe to use immediately after any write to EEPROM, as it does NOT wait for WR to clear. This is by design, to allow minimal code size if a sequence of reads is desired. To guarantee uncorrupted writes insert while(WR)continue; before calling EEPROM_READ(). */ #if _EEPROMSIZE > 0 && defined(_PLIB) #define EEPROM_READ(addr) Read_b_eep(addr) #define eeprom_read(addr) Read_b_eep(addr) #else #define EEPROM_READ(addr) 0 // Added only for code portability #define eeprom_read(addr) 0 #endif #if _EEPROMSIZE > 0 && defined(_PLIB) #define EEPROM_WRITE(addr, value) (Busy_eep(), Write_b_eep(addr,value)) #define eeprom_write(addr, value) (Busy_eep(), Write_b_eep(addr,value)) #else #define EEPROM_WRITE(addr, value) // Added only for code portability #define eeprom_write(addr, value) #endif [/code]