| ??? 01/01/10 18:32 Modified: 01/01/10 19:32 Read: times |
#172100 - I'll look at it tomorrow Responding to: ???'s previous message |
I don't see nothing wrong at the moment.
Could you please tell us more on your hardware at the moment, please? Any external memory, any external watchdog? Anything else worth mentioning? How do you program the P89V51RD2? What version of bootloader is in that chip? JW PS. [added slightly later] Just tried to assemble your code, then noticed, that there are two "stop:" labels (OK one is lowercase second uppercase, but I know of no case sensitive '51 assembler) - did this very code get assembled without errors at your place? Also, you have "nothing" after the "LCALL R_EAD" line; that in case that there was previously some other code programmed into the chip and if you before programming code erase only the sectors which are going to be programmed, may lead to unpredictible results. PS2: More questions: you say you try to "send" the read data to port0 - do you have pullups on that port? |
| Topic | Author | Date |
| P89V51RD2 IAP and ISP writeup | 01/01/70 00:00 | |
| e-mail it to andy ayre | 01/01/70 00:00 | |
| thanks for replay | 01/01/70 00:00 | |
| once again readout data | 01/01/70 00:00 | |
| I'll look at it tomorrow | 01/01/70 00:00 | |
| case sensitive assembler | 01/01/70 00:00 | |
| Read Data....from address | 01/01/70 00:00 | |
| What kind of programmer? | 01/01/70 00:00 | |
| never saw a chip that .. | 01/01/70 00:00 | |
| Maybe not now ... | 01/01/70 00:00 | |
| Before 2000h perfect working | 01/01/70 00:00 | |
| no bootloader | 01/01/70 00:00 | |
| Why at 0x0100? | 01/01/70 00:00 | |
| p89v51rd2bn | 01/01/70 00:00 | |
| Have you told us everything? | 01/01/70 00:00 | |
| using IAP routine | 01/01/70 00:00 | |
| I'd suggest you focus on the datasheet | 01/01/70 00:00 | |
| datasheet | 01/01/70 00:00 | |
| I love these replies | 01/01/70 00:00 | |
| NXP practice | 01/01/70 00:00 | |
| not in this case | 01/01/70 00:00 | |
| Getting Solution | 01/01/70 00:00 | |
| HUH???? | 01/01/70 00:00 | |
good response | 01/01/70 00:00 | |
| have you read my last two posts? | 01/01/70 00:00 |