| ??? 03/07/10 17:08 Read: times |
#173920 - read the datasheet and buy the iron Responding to: ???'s previous message |
Joel Ward said:
Not only this but you will notice that the enable is strobed low then high, strobing the enable pin as usual does not print the character. If the controller is HD44780-compatible indeed, this is a clear indication that you do something very, very wrong. Joel Ward said: Surely it will. Get delay correct first. Chances are, that your delay is completely optimised away by the compiler. If you make E strobe "correct" polarity, it may be too short then, or it may change too soon after other signals change or both. That may be the reason why it did not work.
I know the delays are completely inaccurate but this should not affect the display? Joel Ward said:
I am not using the busy pin as I do not have a soldering iron to make a jumper to enable the busy pin. Does this module have a jumper for this? It is then not HD44780-compatible, as busy is there signalled through a data line, D7, which must be connected for normal operation anyway. But, regardless of all that above, get a soldering iron, some solder, and a pair of sharp pliers, as soon as possible. It's just a couple of pounds and an investment well worth. Jan Waclawek |
| Topic | Author | Date |
| Display problems | 01/01/70 00:00 | |
| forgot to mention! | 01/01/70 00:00 | |
| read the datasheet and buy the iron | 01/01/70 00:00 | |
| just a minute ... | 01/01/70 00:00 | |
| If you can't "afford" the one pin for the R/W signal | 01/01/70 00:00 | |
| Why not address his question instead of wasting more money? | 01/01/70 00:00 | |
| odd behaviour | 01/01/70 00:00 | |
| Magic? | 01/01/70 00:00 | |
| oscilloscope is fine, but in this case... | 01/01/70 00:00 | |
| Both, I think | 01/01/70 00:00 | |
| "magic" is synonym for "luck" | 01/01/70 00:00 | |
| working | 01/01/70 00:00 | |
| min & max limits | 01/01/70 00:00 | |
| Delay lengths | 01/01/70 00:00 | |
If only folks would do what we once always did ... | 01/01/70 00:00 | |
| RW pin is defined but | 01/01/70 00:00 |