| ??? 03/26/06 17:17 Read: times |
#113137 - whatever you find for the Basic Stamp is Responding to: ???'s previous message |
how to connect it to your BASIC Stamp II, but u can easily connect it to your 8051/8052.
whatever you find for the Basic Stamp is written for that audience. I can easily visualize the "horrors" of implementing a key scan/debounce in BASIC. That something may be the only/most feasible approach for having a keypad with the Basic Stamp, does not mean it is right for you. A 4*4 keypad can be implemented with 4in and 4 out bits and the 74C922 require 6 bits and cost you $6. Even better for $1 you can get a small LPC (or atmel 4 digit) which and do the same and cost you NO pins because you will already have IIC on your system. I have, in some of my designs the key processing offloaded to a LPC and ir works. Erik |
| Topic | Author | Date |
| 74C922 | 01/01/70 00:00 | |
| You don't need to know much | 01/01/70 00:00 | |
| LCD | 01/01/70 00:00 | |
| 74C922 | 01/01/70 00:00 | |
| I'm curious, of course, | 01/01/70 00:00 | |
| RE: 74C922 | 01/01/70 00:00 | |
| comments | 01/01/70 00:00 | |
| RE: comments | 01/01/70 00:00 | |
| whatever you find for the Basic Stamp is | 01/01/70 00:00 | |
| Let's not go there ... | 01/01/70 00:00 | |
| Let's not go there ... as well | 01/01/70 00:00 | |
| Isn't the reason obvious? | 01/01/70 00:00 | |
| Where do you get that information from? | 01/01/70 00:00 | |
| It's speculation | 01/01/70 00:00 | |
| yes it is SEMA PLEASE REPLY | 01/01/70 00:00 | |
| Donner und Blitzen | 01/01/70 00:00 | |
| That's EXACTLY what it is, I'll bet | 01/01/70 00:00 | |
| timing is everything | 01/01/70 00:00 | |
| Difficult to answer | 01/01/70 00:00 | |
| second rate | 01/01/70 00:00 | |
| One-off doesn't mean second-rate | 01/01/70 00:00 | |
| nice to see you almost agree | 01/01/70 00:00 | |
| Almost might be an overstatement | 01/01/70 00:00 | |
| 74C922 | 01/01/70 00:00 | |
| We should close this thread,... | 01/01/70 00:00 | |
The noise probably scared him off | 01/01/70 00:00 |