| ??? 05/07/07 17:00 Read: times |
#138727 - Have you carefully read the datasheet? Responding to: ???'s previous message |
I'm not sufficiently fluent in 'C' to understand what you're doing. However, the '922 produces a level strobe with a duration as long as the keypress, though it is debounced.
There are too many things that could be wrong to guess what's the problem here. Have you made this keypad encoder/LCD combination function using ASM? RE |
| Topic | Author | Date |
| external interrupt using by keypad encoder 74c922 | 01/01/70 00:00 | |
| that code does not compile | 01/01/70 00:00 | |
| it is wotking now... | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| strongly and totally disagree | 01/01/70 00:00 | |
| Have you carefully read the datasheet? | 01/01/70 00:00 | |
| what good would that do? | 01/01/70 00:00 | |
| Apparently, you haven't done that either, Erik | 01/01/70 00:00 | |
| Misread? | 01/01/70 00:00 | |
| 922 and 922 | 01/01/70 00:00 | |
| Here we go again ... | 01/01/70 00:00 | |
| Why ASM | 01/01/70 00:00 | |
| Fundamental misconception | 01/01/70 00:00 | |
| nope, here is the correction | 01/01/70 00:00 | |
| what about, for a change, answering a question? | 01/01/70 00:00 | |
| If you can\'t do it in ASM, you can\'t do it at all. | 01/01/70 00:00 | |
| LCD Routine take time. | 01/01/70 00:00 | |
| it is a good idea, but the problem in another... | 01/01/70 00:00 | |
what an understatement | 01/01/70 00:00 |