1 files changed, 105 insertions, 0 deletions
diff --git a/src/overo_gpioout.c b/src/overo_gpioout.c
new file mode 100644
index 0000000..4eeb5a3
--- /dev/null
+++ b/src/overo_gpioout.c
@@ -0,0 +1,105 @@
+/* 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[30];
+	sprintf(dirfile,"/sys/class/gpio/gpio%d/value",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);
+}