| ??? 02/22/05 08:58 Read: times |
#88122 - remarks Responding to: ???'s previous message |
1. The ports are open drain (collector) - a transistor that switches to ground. If you connect it to ground, nothing happens. If you don't connect it directly to VCC, nothing happens.
2. You don't return from the sndchr routine; rather, you fall through to delay; hence duration of delay is given by the transmitted character. I don't think this is what you intended to do. My advice: get rid of the delay altogether; rather, check for ti wait_tx: jnb ti,wait_tx 3. You fall through from crlf to sndchr, possibly transmitting some garbage (zero) character (and if you get rid of the delay routine, transmitting cr twice). Jan Waclawek |
| Topic | Author | Date |
| How to display keypad press on PC screen | 01/01/70 00:00 | |
| Keypad | 01/01/70 00:00 | |
| Mistake! | 01/01/70 00:00 | |
| How many buttons? | 01/01/70 00:00 | |
| Break up the project... | 01/01/70 00:00 | |
| Use HyperTerm for Recv & Displ | 01/01/70 00:00 | |
| Full Hypoterminal settings | 01/01/70 00:00 | |
| HEX Displ -Try other Term Emalua Pck | 01/01/70 00:00 | |
| Simple but good | 01/01/70 00:00 | |
| TERM95 | 01/01/70 00:00 | |
| My keypad program, please verify problem | 01/01/70 00:00 | |
| A suggestion | 01/01/70 00:00 | |
| Commenting - may answer own question! | 01/01/70 00:00 | |
| Port can be spoilt? | 01/01/70 00:00 | |
| please clarify | 01/01/70 00:00 | |
| Both also I tried before | 01/01/70 00:00 | |
| remarks | 01/01/70 00:00 | |
| How to transmit cr twice? | 01/01/70 00:00 | |
| eh?? | 01/01/70 00:00 | |
| CR twice | 01/01/70 00:00 | |
| To CR or not to CR :-) | 01/01/70 00:00 | |
Delay are not suppose to get rid | 01/01/70 00:00 | |
| knowing the derivative would be nice | 01/01/70 00:00 |