Problem with MCP23S17.cpp #defines

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1

:frowning: I just downloaded the MCP23S17 library from GITHUB and installed it. I am making an SPI interface for a 16 input relay board. I wrote a little sequencer routine (borrowing heavily from the for loop example) and found after several minutes of head scratching that somehow the constant OUTPUT is defined as a 1 and INPUT is defined as 0. I looked in MCP23S17.cpp and they are defined correctly as OUTPUT =0 and INPUT=1. Anyone have an idea why when I use pinMode as below it works but RelayBoard.pinMode(thisPin,OUTPUT); doesn't
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#include <SPI.h>
#include <MCP23S17.h>

MCP RelayBoard(0); //Instantiate the MCP23S17 at address 0 A0=0, A1=0, A2=0

int timer = 200; // The higher the number, the slower the timing.

void setup() {
// use a for loop to initialize each pin as an output:
for (int thisPin = 1; thisPin < 9; thisPin++) {
RelayBoard.pinMode(thisPin, LOW); //for some reason OUTPUT is defined as a 1 and INPUT as a 0
// even though MCP23S17.cpp has defines that are the reverse of that. (as they should be)
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I can use INPUT or LOW or 0 and the sketch works

are theMCP23S17.cpp defines maybe being overridden by another define that I haven't found in some other include?

2

are theMCP23S17.cpp defines maybe being overridden by another define that I haven't found in some other include?

Maybe.

I just downloaded the MCP23S17 library from GITHUB

Github is a big place. I've got better things to do than wander around there all day. Narrow down the search area a bit, eh?

3

The library I'm referring to is the one the ARDUINO TUTORIAL points to when you search for 'MCP23S17 library'.

4

when you search for 'MCP23S17 library'.

You meant if, and I've already made it clear that I expect YOU to do the searching and post a link.