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rs485 interrupt question

 
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koray_duran



Joined: 04 Feb 2010
Posts: 37

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rs485 interrupt question
PostPosted: Fri Mar 12, 2010 4:59 am     Reply with quote
Hi,

In rs485.c we should use int_rda or int_ext system in receiving mode. Is there any way to do this without interrupts ?

I use 18F67J60 and my pins are ;
B4 - RE
D2 - RX
D1 - TE
D0 - TX
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Mar 12, 2010 1:03 pm     Reply with quote
The rs485.c driver gives you the option to use a hardware UART (on pins
C6 and C7) or a software UART (on pins B3 and B0). The default case is
to use the hardware UART.

If you want to use the software UART, then you need to put the following
#define statement above the #include line for the rs485 driver. Example:
Code:

#define RS485_USE_EXT_INT   TRUE
#include <rs485.c>


Quote:

Is there any way to do this without interrupts ?

The rs485.c driver is written to use interrupts. The interrupt routine
receives the incoming packet bytes and puts them into a buffer.
I don't want to write driver for you that doesn't use interrupts.
It's best if you use the CCS driver.

More explanation of the rs485.c driver:
http://www.ccsinfo.com/forum/viewtopic.php?t=36810
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