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setup_spi error; maybe a bug?

 
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setup_spi error; maybe a bug?
PostPosted: Sat Jan 24, 2009 7:31 am     Reply with quote
Hi

Is the setup_spi doing the right thing?
(PIC 18xx2455 PCW 4.083)

If using PortB.1 as input it wont work because the tris is set to output?
Maybe a compiler bug?

The setup_spi can work without the tris setting.

Code:
setup_spi(SPI_SS_DISABLED);

0B22:  BCF    SSPCON1.SSPEN
0B24:  BCF    TRISC.7
0B26:  BSF    TRISB.0
0B28:  BCF    TRISB.1
0B2A:  MOVLW  01
0B2C:  MOVWF  SSPCON1
0B2E:  MOVLW  00
0B30:  MOVWF  SSPSTAT
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Jan 24, 2009 1:04 pm     Reply with quote
You're keeping the SPI module active, but only disabling Slave Select.
To completely disable it and have it not touch the TRIS, do it like this.
Code:
.................... setup_spi(FALSE); 
0018:  CLRF   SSPCON1
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