| ??? 11/11/04 09:00 Read: times |
#81023 - NOT RS232!! Responding to: ???'s previous message |
Shahzad said:
any advise if both chips are communicating over RS232 and when i bring in the RS485 cabling and they are not communicating DO NOT USE RS232! Adding the RS232 transceivers just brings in another irrelevant unknown to your tests! Just use a direct, logic-level connection! Again: a a direct, logic-level connection is not an RS232 connection! http://www.8052.com/forum/read.phtml?id=81019 Shahzad said:
where should i look for problems. Use an oscilloscope to verify that the correct signal is coming out of the processor's TX port pin, arrives correctly at your RS485 driver's input, appears correctly at your RS485 driver's output, reaches the RS485 receiver's input correctly, and finally arrives OK at the other processor's RX pin. Repeat for the link in the opposite direction. |
| Topic | Author | Date |
| RS232 between two 8052's | 01/01/70 00:00 | |
| RE: RS232 between two 8052\\\'s | 01/01/70 00:00 | |
| RE: RS232 between two 8052\\\'s | 01/01/70 00:00 | |
| Not RS232 | 01/01/70 00:00 | |
| more advise needed | 01/01/70 00:00 | |
| NOT RS232!! | 01/01/70 00:00 | |
RE: NOT RS232!! | 01/01/70 00:00 | |
| Yes and No | 01/01/70 00:00 | |
| RE: RS232 between two 8052's | 01/01/70 00:00 |