| ??? 01/31/05 20:53 Read: times |
#86243 - Extra UART needed? Responding to: ???'s previous message |
Of course you will need to interrupt the existing connection to the MAX232-or-so. As I understand, this is a kind of development board with some sort of monitor in an (external) ROM, enabling to upload some code into an exernal RAM and run it. Interrupting the existing UART you will lose the connection between the board and PC. You can of course download the code, then switch somehow to the RF module and run, but maybe this will not be saisfactory - e.g. you will lose the ability of the "monitor" to step the code (if it exists at all). Then, you might consider - writing (or getting from the net) a emulated (software, bit-banged) UART (Tx on any pin, Rx best on an external interrupt capable pin; might need some spare timer), or - get an extra HW UART (dedicated IC,or "homemade" from a small mcu) and interface it to the mcu/devboard. And study, study, study... :-) Jan Waclawek |
| Topic | Author | Date |
| P1 serial data | 01/01/70 00:00 | |
| Why not use the UART? | 01/01/70 00:00 | |
| Pin 10 and 11 | 01/01/70 00:00 | |
| back to basics | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| will cost you anyhow | 01/01/70 00:00 | |
| Already Have | 01/01/70 00:00 | |
| What kind od serial data | 01/01/70 00:00 | |
| Type of data | 01/01/70 00:00 | |
| RTFM | 01/01/70 00:00 | |
| Wrong end of stick! | 01/01/70 00:00 | |
| Serial | 01/01/70 00:00 | |
| still unspecific | 01/01/70 00:00 | |
| ROM | 01/01/70 00:00 | |
| a ROM can not map anything | 01/01/70 00:00 | |
| End of wrong stick! | 01/01/70 00:00 | |
| Mystery? | 01/01/70 00:00 | |
| its still a mystery | 01/01/70 00:00 | |
| Module | 01/01/70 00:00 | |
| not yet | 01/01/70 00:00 | |
| UART is not a good choice | 01/01/70 00:00 | |
| Manchester | 01/01/70 00:00 | |
| You didn't get it, but that's OK | 01/01/70 00:00 | |
| The Stick! | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Extra UART needed? | 01/01/70 00:00 | |
| Wires? Grounding?? | 01/01/70 00:00 | |
| uC to RF module interface wires | 01/01/70 00:00 | |
| disconnect the MAX232 | 01/01/70 00:00 | |
It looks like a straight tranceiver | 01/01/70 00:00 |