Good day

I am using the SN75176 to communicate (RS485) between two PICs.
For testing my cable is about 1m long running @ 4Mhz using PIC16F877.
I have a TX Pic and a RX Pic, on the RX side I send the data received to the PC for debuggin purposes.
I only transmit 1 character, and receive it on the RX side and send it to the PC.


<hr>
Here is the code for the TX side:

<code>
'======== RS485TX.BAS =====================

Include "Modedefs.bas"

DEFINE OSC 4 ' Set the Xtal frequency

P0 VAR PORTB.6
P1 VAR PORTB.7

CCP1CON = 0
ADCON1 = 7

Main:

OUTPUT P0
HIGH P0
SEROUT P1,N2400,["R"]

GOTO MAIN

END
</code>

<hr>
Here is the code for the RX side:

<code>
'======== RS485RX.BAS =====================

Include "Modedefs.bas"

DEFINE OSC 4 ' Set the Xtal frequency

P0 VAR PORTB.6
P1 VAR PORTB.7
DEBUGPIN VAR PORTB.5
DATARECEIVED VAR BYTE

CCP1CON = 0
ADCON1 = 7

Main:

OUTPUT P0
LOW P0
SERIN P1,N2400,DATARECEIVED

SEROUT DEBUGPIN,N2400,["Received:", DATARECEIVED, 13, 10]

GOTO Main

END
</code>

<hr>

On the PC Side I get the following:

Received:R
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’
Received:%
Received:J
Received:•
Received:*
Received:T
Received:©
Received:R
Received:€
Received:I
Received:’

<hr>

Any ideas

Thank you
Koossa