| ??? 02/24/06 16:53 Read: times |
#110695 - Oh I see... Responding to: ???'s previous message |
Those are SFR's and user defined variables. I'm curious to know what document you are reading other than the datasheet, which doesn't even explain those particular SFR's
From this application note http://www.semiconductors.philips.com/acrobat/a...0342_1.pdf I read: • Move the LOAD command in the FMCON SFR. • Move the low address of the byte to be programmed in the FMADRL SFR. • Move the high address of the byte to be programmed in the FMADRH SFR. • Move the data to be programmed in the FMDATA SFR. • Move the ERASEPROGRAM command into the FMCON SFR. After this sequence the internal Flash state machine will first do an erase operation on the Flash byte and then program the data in the same Flash byte. The erase program command takes 4ms, 2ms to erase and 2ms to program the byte. Which means to me that this sequence must be performed for each byte. Now let's look at some of your code.
LOAD_PAGE:
MOV FMDATA,@R0
INC R0
DJNZ R3,LOAD_PAGE
Assuming R0 was already defined as 00H, R3 as 64. This takes the byte from location zero and puts it in FMDATA. Then you move the pointer to the next location and loops 64 times, but does nothing other than cycle through and when done FMDATA contains the 64th byte of data. Then you:
MOV FMCON,#68H ; "ERASE" COMMAND FOR 89LPC952
Which initializes the erase/write sequence for the last byte only. Seems to me that your loop is set up wrong. Jon |
| Topic | Author | Date |
| 89LPC952 FLASH PROGRAMMING | 01/01/70 00:00 | |
| Notes on posting code | 01/01/70 00:00 | |
| rewrritten code 89LPC952 IAP code | 01/01/70 00:00 | |
| what more do you need | 01/01/70 00:00 | |
| Not sufficient!!! | 01/01/70 00:00 | |
| how did you not "see" that? | 01/01/70 00:00 | |
| I have written the code.... | 01/01/70 00:00 | |
| Looks to me like | 01/01/70 00:00 | |
| I have written the code | 01/01/70 00:00 | |
| How can writing a constant be "the next" | 01/01/70 00:00 | |
| Oh I see... | 01/01/70 00:00 | |
| Disreguard previous post | 01/01/70 00:00 | |
| a hint | 01/01/70 00:00 | |
| updated code for 89LPC952 IAP | 01/01/70 00:00 | |
| The above correction ('ONE' should be '1 | 01/01/70 00:00 | |
| Ok... | 01/01/70 00:00 | |
| That's exactly my question | 01/01/70 00:00 | |
| How about.... | 01/01/70 00:00 | |
| Thanks it worked!! | 01/01/70 00:00 | |
You're welcome | 01/01/70 00:00 | |
| Neat | 01/01/70 00:00 | |
| If we go there, then | 01/01/70 00:00 |