| ??? 12/02/04 18:29 Read: times |
#82419 - where does it happen Responding to: ???'s previous message |
...it is important to know that RI and TI happen in the middle of the stop bit, not at the end of it
George said: I think that TI-bit is set at the end of the 8th bit time in mode 0, or at the beginning of the stop bit in the other modes not at the middle (see TI curve on figure 14, page 13 of the 51-bible) "the bible" seems to indicate that this happens at the start of the stop bit; I did not check. I have for ages routinely delayed a little bit before turning the bus and never had problems. There may, of course be derivative differences, who knows. Maybe I mixed RI and TI timing. ANYHOW, the issue is you must delay a bit after TI before turning the bus around if you are doing 485 comms Next time I get something on the bench that transmits, I'll scope it out and come back with a definite answer. Erik |
| Topic | Author | Date |
| THE TIME OF TI | 01/01/70 00:00 | |
| Bitrate | 01/01/70 00:00 | |
| interrupt-driven | 01/01/70 00:00 | |
| Why interrupt driven? | 01/01/70 00:00 | |
| UART Serial Port Interrupt | 01/01/70 00:00 | |
| all the above | 01/01/70 00:00 | |
| UART communication by UART interrupt | 01/01/70 00:00 | |
| just TI=1 | 01/01/70 00:00 | |
| serial interrupt in adc interrupt | 01/01/70 00:00 | |
| start with something simple | 01/01/70 00:00 | |
| misunderstand behaviour | 01/01/70 00:00 | |
| See the examples | 01/01/70 00:00 | |
| not has to, but can | 01/01/70 00:00 | |
| The difference is | 01/01/70 00:00 | |
| " | 01/01/70 00:00 | |
| He's right | 01/01/70 00:00 | |
| How the 8051 UART works | 01/01/70 00:00 | |
| The TI-bit Set Time | 01/01/70 00:00 | |
| no, at the middle | 01/01/70 00:00 | |
| The Transmitter Part, Actually | 01/01/70 00:00 | |
| Setting of TI | 01/01/70 00:00 | |
| sometimes chip designers listen | 01/01/70 00:00 | |
| So, Erik | 01/01/70 00:00 | |
| where does it happen | 01/01/70 00:00 | |
| Mode 1 TI timing. | 01/01/70 00:00 | |
| How to post code | 01/01/70 00:00 | |
RS485 & bus turnaround | 01/01/70 00:00 |