| ??? 06/18/05 04:59 Read: times |
#95235 - Multiple 8051s communication Responding to: ???'s previous message |
Muhammad Naeem said:
My question is when Master is communicating with PC how is communication with slaves.Because 89c51 have only one URAT.
I have to use 89c51 not other So you know the problem and the limitation of having just one UART. 1) Use a derivative with dual UART. 2) Implement a soft (virtual) UART. 3) Configure all 8 micros as salve and let PC serve as master. 4) Multiplex the UART of master micro with slaves and PC using some buffers. I am just wondering what type of I/O expansion it is which requires other 8051s instead of standard I/O expanders. You said your slaves control relays. As such relays can be controller by expanding the I/O of just one micro. Note: Avoid 89C51 if it is AT89C51 from ATMEL. This is a discontinued part. Use 'S' series instead like AT89S52 etc. |
| Topic | Author | Date |
| One 89c51 Master and 7 Slaves | 01/01/70 00:00 | |
| Multiple 8051s communication | 01/01/70 00:00 | |
| Standard IO expender | 01/01/70 00:00 | |
| try 74xx273 | 01/01/70 00:00 | |
| Try parallel comm, | 01/01/70 00:00 | |
| Defeating the object? | 01/01/70 00:00 | |
| Parallel communnication | 01/01/70 00:00 | |
| expand the i/o | 01/01/70 00:00 | |
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| Answer | 01/01/70 00:00 | |
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| CAN?? | 01/01/70 00:00 | |
| the most I ever drove | 01/01/70 00:00 | |
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| Big Box | 01/01/70 00:00 | |
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| Maxim | 01/01/70 00:00 | |
| explain,what calculation | 01/01/70 00:00 | |
Hmmmm.... | 01/01/70 00:00 |