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| Search found 6 matches |
| Author | Message |
|---|---|
 Topic: need help with RS485 |
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| w6bvb Replies: 11 Views: 18940 |
 Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 3:27 pm Subject: need help with RS485 |
| Thank you Ttelmah.
It was physical layer problem. Start working after biasing. |
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| Topic: need help with RS485 |
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| w6bvb Replies: 11 Views: 18940 |
Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 2:28 pm Subject: need help with RS485 |
| Yes, the RE/DE line of SP485E connected to RA0 (J1 in position 1_2).
And this is the code. No echo. When I hit keyboard on PC, pin A0 changing state from 1 to 0 for 1ms. I can see data on pin C7, ... |
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| Topic: need help with RS485 |
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| w6bvb Replies: 11 Views: 18940 |
Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 1:56 pm Subject: need help with RS485 |
| One more thing. kbhit() returning TRUE constantly in RS485 mode. | |
| Topic: need help with RS485 |
|
| w6bvb Replies: 11 Views: 18940 |
Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 1:54 pm Subject: need help with RS485 |
| Compiler version 4.068
#include <16F876A.h> #device *=16 #fuses HS, NOWDT, NOLVP, NOBROWNOUT, NOPROTECT, PUT #use delay(clock=18432000, xtal=18432000) //#use rs232(baud=9600 ... |
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| Topic: need help with RS485 |
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| w6bvb Replies: 11 Views: 18940 |
Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 1:39 pm Subject: need help with RS485 |
| PCM programmer, thank you for reply.
The hardware is ok. Output of SP485 routed to the 5 pin terminal block (SJ5 and SJ4 are soldered). The terminated resistor R7 is connected (Jumper J3 is ON). R ... |
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| Topic: need help with RS485 |
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| w6bvb Replies: 11 Views: 18940 |
Forum: General CCS C Discussion Posted: Mon Mar 09, 2009 11:32 am Subject: need help with RS485 |
| Hi,
I can not make it work for some reason. The hardware: http://www.modtronix.com/product_info.php?cPath=108_109&products_id=111 Controller: PIC16F876A RS485 driver: SP485E connected to PIC a ... |
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