微處理器 - STCmicro STC15W104 - Assembly - EEPROM

參考資訊：
http://plit.de/asem-51/
http://www.stcisp.com/stcisp620_off.html
https://sourceforge.net/projects/mcu8051ide/

暫存器

P.S. 在寫入EEPROM資料前，必須先做Erase的動作，而讀入EEPROM後，記得Disable IAP功能

main.s

    led       set p3.2
    uart_tx   set p3.1
    iap_data  set 0c2h
    iap_addrh set 0c3h
    iap_addrl set 0c4h
    iap_cmd   set 0c5h
    iap_trig  set 0c6h
    iap_contr set 0c7h
 
    .org 0h
    jmp _start
     
    .org 100h
_start:
    setb led
    mov r0, #00h
    mov r1, #00h
    call eeprom_erase
    mov r0, #00h
    mov r1, #00h
    mov r2, #55h
    call eeprom_write
    mov r0, #00h
    mov r1, #00h
    call eeprom_read
    call uart_send
    clr led
    jmp $

eeprom_disable:
    mov iap_contr, #00h
    mov iap_cmd, #00h
    mov iap_trig, #00h
    mov iap_addrh, #80h
    mov iap_addrl, #00h
    ret

eeprom_erase:
    mov iap_addrh, r1
    mov iap_addrl, r0
    mov iap_contr, #83h
    mov iap_cmd, #3
    mov iap_trig, #5ah
    mov iap_trig, #0a5h
    nop
    call eeprom_disable
    ret

eeprom_read:
    clr iap_data
    mov iap_addrh, r1
    mov iap_addrl, r0
    mov iap_contr, #83h
    mov iap_cmd, #1
    mov iap_trig, #5ah
    mov iap_trig, #0a5h
    nop
    mov a, iap_data
    call eeprom_disable
    ret

eeprom_write:
    mov iap_data, r2
    mov iap_addrh, r1
    mov iap_addrl, r0
    mov iap_contr, #83h
    mov iap_cmd, #2
    mov iap_trig, #5ah
    mov iap_trig, #0a5h
    nop
    call eeprom_disable
    ret

uart_send:
    mov r0, #8
    clr uart_tx
    mov r1, #44
    djnz r1, $
u0:
    rrc a
    jc u1
    clr uart_tx
    sjmp u2
u1:
    setb uart_tx
u2:
    mov r1, #44
    djnz r1, $
    djnz r0, u0
    setb uart_tx
    mov r1, #44
    djnz r1, $
    ret
    .end

編譯

$ mcu8051ide --compile main.s

完成