| ??? 02/09/07 15:29 Read: times |
#132377 - timing and stability Responding to: ???'s previous message |
Cezara Coman said:
Thank you Patrick, at89c51cc03 is working fine with led blinking program. I think is a hardware problem but i dont know where. I check long time with scope to see what happen, sometimes when turn on the board, i will see good signal, sometimes not.. i measure the VCC but no spike there, is stabilized. Anyhow i try all posible, quartz, other microcontroller, other data cable, i will watch again at program, thank you for help Is your chip being reset properly? Check for possible timing differences... do you check for the Busy signal on your LCD, or do ou rely on timing loops.... Is your LCD properly being initialised? Apparently you do not have a consistent performance, so the system is not stable... you may have timing problems or reset problems. regards |
| Topic | Author | Date |
| LCD buffer | 01/01/70 00:00 | |
| schematic? | 01/01/70 00:00 | |
| conection | 01/01/70 00:00 | |
| differences | 01/01/70 00:00 | |
| board | 01/01/70 00:00 | |
| try to determine where the differences are... | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 | |
| timing and stability | 01/01/70 00:00 | |
SOLVED | 01/01/70 00:00 |