| ??? 07/15/06 21:50 Read: times |
#120302 - a few blind shots Responding to: ???'s previous message |
Russell Bull said: Yeah, yeah. Some of the "clones" of the original Hitachi controller require different timing (longer delays). Also, check how long your delay really lasts.
1. Read the datasheet for the lcd controller - you do not follow the initialisation sequence for 4 bit mode. This is critical. Russell Bull said:
2. What speed/type of cpu are you using. Timing is critical with the lcds. Anything over 12MHz/12clock will require extra delays in the setb EN,clr EN sequence. Again, read the datasheet. Yeah, yeah. yeah. :-) JW |
| Topic | Author | Date |
| lcd code not working in bit mode. | 01/01/70 00:00 | |
| correction=>the code here is for 4bit mode | 01/01/70 00:00 | |
| A few possible problems | 01/01/70 00:00 | |
| a few blind shots | 01/01/70 00:00 | |
| Whats wrong with | 01/01/70 00:00 | |
| the difference is... | 01/01/70 00:00 | |
| You can do | 01/01/70 00:00 | |
| So mask it | 01/01/70 00:00 | |
| Yes I realise this! | 01/01/70 00:00 | |
| I didn't know that... | 01/01/70 00:00 | |
| A.x | 01/01/70 00:00 | |
| 8bit mode works by entering 38h only once | 01/01/70 00:00 | |
| But you're not using 8 bit mode. | 01/01/70 00:00 | |
| LCD datasheets ... | 01/01/70 00:00 | |
| A contentious issue! | 01/01/70 00:00 | |
| cpu and speed | 01/01/70 00:00 | |
| Oakely Doakely | 01/01/70 00:00 | |
| Clear LCD delay too short? | 01/01/70 00:00 | |
| Check this also | 01/01/70 00:00 | |
| delays are just fine | 01/01/70 00:00 | |
| Did you try... | 01/01/70 00:00 | |
| Look here | 01/01/70 00:00 | |
| also note that... | 01/01/70 00:00 | |
thank you Jon | 01/01/70 00:00 | |
| You Sure | 01/01/70 00:00 |