| ??? 12/27/07 09:45 Read: times |
#148772 - Another opposite Responding to: ???'s previous message |
Russell Bull said:
As for checking lcd busy - that requires another port pin! Which pin might that be? R/W? Russell Bull said:
Then what happens when the lcd fails? The code gets stuck in the wait loop unless you check for a timeout. The watchdog bites the fat and lazy LCD !!! Russell Bull said:
Then what do you do if it times out? I got caught by this years ago, so now i don't bother with checking the busy status - just a fixed delay. Your programs will be that much slower. Yeah - the LCD can really slow things quite radically. With constant delays one has to plan with worst case scenario. Russell Bull said:
If the lcd fails - the code keeps going. I've found the displays I've used over the years are quite consistant with timing. So choose your poison! If the LCD fails it should be reset. One way to do this is to harness yet another pin and have it control the VCC of the display. |
| Topic | Author | Date |
| LCD 8x24 - samsung 0282a | 01/01/70 00:00 | |
| add. info | 01/01/70 00:00 | |
| add. info | 01/01/70 00:00 | |
| What language are you using? | 01/01/70 00:00 | |
| solved! | 01/01/70 00:00 | |
| Binary numbers in 'C' | 01/01/70 00:00 | |
| Wrong operator | 01/01/70 00:00 | |
| As You are using C, why not | 01/01/70 00:00 | |
| Do not use fixed delays - check for LCD busy | 01/01/70 00:00 | |
| I've found the opposite! | 01/01/70 00:00 | |
| Binary numbers in 'C' | 01/01/70 00:00 | |
| Infinite waits | 01/01/70 00:00 | |
| Actually it is time | 01/01/70 00:00 | |
| Another opposite | 01/01/70 00:00 | |
| and .. | 01/01/70 00:00 | |
| Whoaaaaaa..... | 01/01/70 00:00 | |
LCD Timeout | 01/01/70 00:00 | |
| Code formatting - avoid TABs | 01/01/70 00:00 | |
| Oh - sorry about that ... | 01/01/70 00:00 | |
| Did you see this? | 01/01/70 00:00 |