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HELLO
Please can anyone help me with the IAP of P89V51RD2 for programming multiplt locations in flash memory.
Thank you
sir
I have programmed the microcontroller but i m unable to program multiple address locations.
can u please tell me how can i IAP the IC and please tell me how to program to multiple locations.
Let us say i have stored a value in flash address 1f00 and then i want to sotre another value in 1f50 and so on
how can i do it.
"i'm unable to program multiple address locations"
But why are you "unable"?
What is preventing you?
What, exactly, have you tried?
What, exactly, were the results?
What documentation and other support resources have you studied?
Have you forgotten to erase the flash sector before programming again?
ics.nxp.com/.../
sir,
i have stored the address value in the DPTR and then after the completion of the writing it will increment the DPTR to the next location.
Is that the correct procedure - as specified in the documentation?
Clearly, just "storing the address value in the DPTR" is not, on its own, sufficient to do anything!
So, what else, exactly, do you do?
Why do you say you are "unable to program"?
"after the completion of the writing it will increment the DPTR to the next location"
What is "it"?
What is the significance of this statement? How does it relate to your problem?
Remember: nobody here knows anything about you or your project. We cannot read your mind.
If you don't give proper details of what you're doing, what results your're getting, etc - how do you expect anyone to be able to help you??
FCF EQU 0B1h ORG 0 ljmp Reset ;---- interrupt vectors ;none here ;---- "main" Reset: ;if we try to rewrite an already programmed byte without previously erasing it, this will fail: MOV DPTR, #TestArea1 MOV A, #55h CALL FLASH_PROGRAM_BYTE ;this is how a sector has to be erased prior bytes in it are being rewritten: MOV DPTR, #TestArea2 CALL FLASH_ERASE_SECTOR MOV DPTR, #TestArea2 MOV A, #0AAh CALL FLASH_PROGRAM_BYTE Stop: SJMP Stop ;---- data area, 128-byte sectors ;make sure that there is no code in the whole sector, ;as upon updating the data the whole sector gets erased ORG 0080h TestArea1: db 0, 0 ORG 0100h TestArea2: db 0, 0 ;end of TestArea2 at 017F ORG 0180h ;rest of code may go here ;---- FLASH API - must be located anywhere ABOVE 2000h ORG 03F00h ;programs a single byte in FLASH ;DPTR=addres, A=content of byte to be programmed ;the position to be programmed must be previously erased FLASH_PROGRAM_BYTE: PUSH IE ;DISABLE INTERRUPTS CLR EA MOV R1,#02 ;SETUP OPERATION CODE -- write byte ANL FCF,#0FCh ;enable boot sector - !!! this command MUST be located ABOVE 2000h!!! CALL 01FF0H ;call to ISP_API (modifies B register but no Rx) ORL FCF,#001h ;switch back to user FLASH POP IE RET ;erases a 128-byte sector in FLASH ;DPTR=address of first byte of sector to be erased FLASH_ERASE_SECTOR: PUSH IE ;DISABLE INTERRUPTS CLR EA MOV R1,#08 ;SETUP OPERATION CODE -- erase sector ANL FCF,#0FCh ;enable boot sector - !!! this command MUST be located ABOVE 2000h!!! CALL 01FF0H ;call to ISP_API (modifies B register but no Rx) ORL FCF,#001h ;switch back to user FLASH POP IE RET ;----- that's all, folks END
this is what is my program
now i m only using testarea1 and 2 to save my data how do i have multiple data in consecutive locations of the flash memory
hope ths is clear
Are you reading datasheets as carefully as you read the posting instructions for this site?
Didn't you notice the notes directly above the message text box, giving information how to post source code?
Or maybe you did write every line starting from the left column and never with more than one space in a row for indent or separation?
FCF EQU 0B1h ORG 0 ljmp Reset ;---- interrupt vectors ;none here ;---- "main" Reset: ;if we try to rewrite an already programmed byte without previously erasing it, this will fail: MOV DPTR, #TestArea1 MOV A, #55h CALL FLASH_PROGRAM_BYTE ;this is how a sector has to be erased prior bytes in it are being rewritten: MOV DPTR, #TestArea2 CALL FLASH_ERASE_SECTOR MOV DPTR, #TestArea2 MOV A, #0AAh CALL FLASH_PROGRAM_BYTE Stop: SJMP Stop ;---- data area, 128-byte sectors ;make sure that there is no code in the whole sector, ;as upon updating the data the whole sector gets erased ORG 0080h TestArea1: db 0, 0 ORG 0100h TestArea2: db 0, 0 ;end of TestArea2 at 017F ORG 0180h ;rest of code may go here ;---- FLASH API - must be located anywhere ABOVE 2000h ORG 03F00h ;programs a single byte in FLASH ;DPTR=addres, A=content of byte to be programmed ;the position to be programmed must be previously erased FLASH_PROGRAM_BYTE: PUSH IE ;DISABLE INTERRUPTS CLR EA MOV R1,#02 ;SETUP OPERATION CODE -- write byte ANL FCF,#0FCh ;enable boot sector - !!! this command MUST be located ABOVE 2000h!!! CALL 01FF0H ;call to ISP_API (modifies B register but no Rx) ORL FCF,#001h ;switch back to user FLASH POP IE RET ;erases a 128-byte sector in FLASH ;DPTR=address of first byte of sector to be erased FLASH_ERASE_SECTOR: PUSH IE ;DISABLE INTERRUPTS CLR EA MOV R1,#08 ;SETUP OPERATION CODE -- erase sector ANL FCF,#0FCh ;enable boot sector - !!! this command MUST be located ABOVE 2000h!!! CALL 01FF0H ;call to ISP_API (modifies B register but no Rx) ORL FCF,#001h ;switch back to user FLASH POP IE RET ;----- that's all, folks END hope now this is fine
For the NXP P89V51RD2 IAP, please check the following documents and example code:
www.efton.sk/.../p89v51rd2 iap.pdf www.efton.sk/.../iap.zip www.efton.sk/.../index.htm
Jan has done a great work!