Timeline for RS485 without flow control
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 1, 2021 at 15:19 | history | edited | DiBosco | CC BY-SA 4.0 | Send to sent |
| Aug 22, 2017 at 1:35 | comment | added | Sumanth V | Set the DE pin high just before transmitting on UART. Connected a wire from DE to ~RE. So both can be controlled with just DE pin. Set DE pin low in UART transmit complete interrupt. Now can send and receive the data. Occasionally i get the last byte that is transmitted back in RX at the micro. Looks like some timing issue regarding ~RE. Currently solving it in by adding some software logic. | |
| Aug 21, 2017 at 6:23 | vote | accept | Sumanth V | ||
| Aug 18, 2017 at 23:41 | comment | added | Sumanth V | All my devices are just daisy chained and connected to the same rx and tx. I am sending a modbus req data to all the devices. One of the field in this request is slave address. So only the intended slave responds back. It's only half duplex. So I was of the assumption that not all devices will transmit simultaneously. So I never cared about direction control. Will try out the way you mentioned. | |
| Aug 18, 2017 at 15:01 | history | edited | DiBosco | CC BY-SA 3.0 | added 36 characters in body |
| Aug 18, 2017 at 14:54 | history | answered | DiBosco | CC BY-SA 3.0 |