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/* overo_gpioout
pd external for output to gumstix overo gpio
Copyright (C) 2012 Tim Redfern
tim@eclectronics.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.
allows use of GPIO pins 144,145 and 170 on overo expansion header for output
creation parameter 1 - 3 - (gpio 144 / 170/ 145)
WARNING use at your own risk!
*/
#include "m_pd.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define min(X,Y) ((X) < (Y) ? (X) : (Y))
#define max(X,Y) ((X) > (Y) ? (X) : (Y))
t_class *overo_gpioout_class;
typedef struct overo_gpioout
{
t_object x_obj;
int gpioNum;
char outfile[32];
FILE *fs;
int set; //0 or 1
} t_overo_gpioout;
void overo_gpioout_float(t_overo_gpioout *x, t_floatarg f)
{
int newset=(int) f;
if (newset!=x->set) {
x->fs = fopen( x->outfile, "w" );
int t;
if (newset) t=fwrite( "1", sizeof(char), 1, x->fs );
else t=fwrite( "0", sizeof(char), 1, x->fs );
fclose(x->fs);
x->set=newset;
}
}
void overo_gpioout_free(t_overo_gpioout *x)
{
//
}
void *overo_gpioout_new(t_floatarg f)
{
t_overo_gpioout *x = (t_overo_gpioout *)pd_new(overo_gpioout_class);
int nums[]={144,170,145};
x->gpioNum=nums[min(2,max(0,((int) f)-1))]; //maps switch number to GPIO number
post("overo_gpoout: using GPIO(%d): switch %d\n",x->gpioNum,min(2,max(1,(int) f)));
sprintf(x->outfile,"/sys/class/gpio/gpio%d/value",x->gpioNum);
post("outfile: %s\n",x->outfile);
char gpionum[4];
sprintf(gpionum,"%d",x->gpioNum);
//if ((
x->fs = fopen( "/sys/class/gpio/export", "w" );
//) < 0 )
//{
// error( "Unable to open exportfile" );
// exit( 1 );
//}
int t=fwrite( gpionum, sizeof(char), 3, x->fs );
fclose(x->fs);
char dirfile[34];
sprintf(dirfile,"/sys/class/gpio/gpio%d/direction",x->gpioNum);
x->fs = fopen(dirfile, "w" );
t=fwrite( "out", sizeof(char), 3, x->fs );
fclose(x->fs);
//if ((
x->fs = fopen( x->outfile, "w" );
//) < 0 )
//{
// error( "Unable to open outfile" );
// exit( 1 );
//}
t=fwrite( "0", sizeof(char), 1, x->fs );
x->set=0;
fclose(x->fs);
return (void *)x;
}
void overo_gpioout_setup(void)
{
overo_gpioout_class = class_new(gensym("overo_gpioout"), (t_newmethod)overo_gpioout_new, (t_method)overo_gpioout_free, sizeof(t_overo_gpioout), 0, A_DEFFLOAT, 0);
class_addfloat(overo_gpioout_class,overo_gpioout_float);
}
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