??? 02/03/11 18:29 Read: times |
#180984 - RS232 is *not* a bus Responding to: ???'s previous message |
That's the fundamental flaw with this arrangement: RS232 is specifically designed for a single point-to-point link - it is not a bus!
If you really must stick with RS232, you could use transceivers with an output enable, and devise a protocol which ensures that only 1 device can ever "talk" at a time. The 8051's 9-bit "Multiprocessor" mode is ideal for this kind of thing... |
Topic | Author | Date |
Paralleling Max232 output | 01/01/70 00:00 | |
Revommedation On Paralleling Outputs | 01/01/70 00:00 | |
Multiple Mux | 01/01/70 00:00 | |
Adding another brain is another option. | 01/01/70 00:00 | |
RS232 is *not* a bus | 01/01/70 00:00 | |
Two UART | 01/01/70 00:00 | |
how about a hub | 01/01/70 00:00 | |
Is there really such a beast? | 01/01/70 00:00 | |
external UARTs | 01/01/70 00:00 | |
There once was... | 01/01/70 00:00 | |
use 422/485 | 01/01/70 00:00 | |
Can work well but big potentials for trouble | 01/01/70 00:00 | |
Thanks, Peter.. | 01/01/70 00:00 | |
I didn't employ anything | 01/01/70 00:00 | |
some comments | 01/01/70 00:00 | |
You really need reliable protocol | 01/01/70 00:00 | |
collision detection | 01/01/70 00:00 | |
Collision avoidance | 01/01/70 00:00 |