PIC16F1508闪存程序存储器的读写问题

1万 · 2021-3-4 15:44

选用了PIC1508芯片，因该芯片没有EEPROM,所以用闪存程序存储器作为数据存储，可调试了两天没成功

2万 · 2021-3-4 15:51

还有什么现象？能再详细描述下吗？

2万 · 2021-3-4 15:54

能读能写，可断电后再读，就没有了原保存的数据，读和擦除功能都正常

2万 · 2021-3-4 15:57

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

1万 · 2021-3-4 16:00

WRITE
            CALL                         ERASURE_A                               ;先擦除再写入
            BCF                            INTCON,GIE                               ; Disable ints so required sequences will execute properly
            BANKSEL                   PMADRH                                     ; Bank 3
            MOVLW                      0X0B                                     ; Load initial address
            MOVWF                      PMADRH
            MOVLW                      0X00
            MOVWF                      PMADRL
            MOVLW                      0X60                                     ; Load initial data address
            MOVWF                      FSR0L
            MOVLW                      0X00                                     ; Load initial data address
            MOVWF                      FSR0H
            BCF                            PMCON1,CFGS                               ; Not configuration space
            BSF                            PMCON1,WREN                               ; Enable writes
            BSF                            PMCON1,LWLO                               ; Only Load Write Latches
WRITE_LOOP
            MOVIW                      FSR0++                                     ; Load first data byte into lower
            MOVWF                      PMDATL
            MOVIW                      FSR0++                                     ; Load second data byte into upper
            MOVWF                      PMDATH
            MOVF                         PMADRL,W                               ; Check if lower bits of address are '00000'
            XORLW                      0x17                                     ; Check if we're on the last of 32 addresses
            ANDLW                      0x17
            BTFSC                      STATUS,Z                               ; Exit if last of 32 words,
            GOTO                         START_WRITE
            MOVLW                      55h                                     ; Start of required write sequence:
            MOVWF                      PMCON2                                     ; Write 55h
            MOVLW                      0AAh
            MOVWF                      PMCON2                                     ; Write AAh
            BSF                            PMCON1,WR                               ; Set WR bit to begin write
            NOP                                                                ; NOP instructions are forced as processor loads program memory write latches
            NOP
            INCF                         PMADRL                                     ; Still loading latches Increment address
            GOTO                         WRITE_LOOP                               ; Write next latches
START_WRITE
            BCF                            PMCON1,LWLO                               ; No more loading latches - Actually start Flash program memory write
            MOVLW                      55h                                     ; Start of required write sequence:
            MOVWF                      PMCON2                                     ; Write 55h
            MOVLW                      0AAh
            MOVWF                      PMCON2                                     ; Write AAh
            BSF                            PMCON1,WR                               ; Set WR bit to begin write
            NOP
            NOP
            BCF                            PMCON1,WREN                               ; Disable writes
            BANKSEL                   W_TEMP
            CALL                         DELAY_RC
            BSF                            INTCON,GIE                               ; Enable interrupts
            RETURN