In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote:

It isn't clear to me that RA.0 is made an INPUT and/or RA.1 is made an OUTPUT if they get declared as such before the PROGRAM directive (or if that matters, but I think it must.)
 

Will this Compile and Run --



[code]

DEVICE SX48, OSC4MHZ
FREQ 4_000_000 

 
PROGRAM Start

 

Start:

 

 'TRIS_A = %00000001


 a      VAR Byte

 

 InPin  PIN RA.0 INPUT CMOS
 OutPin PIN RA.1 OUTPUT
 Led1   PIN RA.2 OUTPUT        'Result Indicator
 Led2   PIN RA.3 OUTPUT        'Acquisition annunciator

 

Testing:
 Led1 = 0
 Led2 = 0
 ANALOGIN InPin, OutPin, a, 1

 IF a > 150 THEN LED1 = 1      'Threshold appx 2.9V
 Led2 = 1                      'indicates acquisition 
 PAUSE 2000
 
GOTO Testing
[/code]

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