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Programming PIC Microcontrollers in BASIC - mikroElektronika

external hardware.

BASIC has a library for working with internal EEPROM which makes writing and reading data very

easy. Library function EEPROM_Read reads data from a specified address, while library procedure

EEPROM_Write writes data to the specified address.

Note: Be aware that all interrupts will be disabled during execution of EEPROM_Write routine (GIE

bit of INTCON register will be cleared). Routine will set this bit on exit. Ensure minimum 20ms delay

between successive use of routines EEPROM_Write and EEPROM_Read. Although EEPROM will

write the correct value, EEPROM_Read might return undefined result.

In our following example, we will write a sequence of numbers to successive locations in EEPROM.

Afterwards, we’ll read these and output to PORTB to verify the process.

program EEPROM_test

dim i as byte

dim j as byte

main:

TRISB = 0

for i = 0 to 20

EEPROM_Write(i, i + 6)

next i

Delay_ms(30)

for i = 0 to 20

PORTB = EEPROM_Read(i)

for j = 0 to 200

Delay_us(500)

next j

next i

end.

8.1.2 Serial EEPROM

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