initial commit

1 files changed, 104 insertions, 0 deletions

diff --git a/src/overo_gpioin.c b/src/overo_gpioin.c
new file mode 100644
index 0000000..cbbf29a
--- /dev/null
+++ b/src/overo_gpioin.c
@@ -0,0 +1,104 @@
+/* overo_gpioin
+   
+   pd external to take input from 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 146 and 147 on overo expansion header for input
+   creation parameter 1 - 2 - (gpio 146 / 147)
+
+   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_gpioin_class;
+
+typedef struct overo_gpioin
+{
+	t_object x_obj;
+	int gpioNum;
+	char inputfile[32];
+	char buffer[2];
+	FILE *fs;
+	int set; //0 or 1
+} t_overo_gpioin;
+
+void overo_gpioin_bang(t_overo_gpioin *x)
+{
+  //fseek( x->fs, 0, SEEK_SET );
+	//if (( 
+	x->fs = fopen( x->inputfile, "r" );
+	//) < 0 )
+	//{
+	//	error( "Unable to open inputfile" );
+	//	exit( 1 );
+	//}
+  int t=fread( x->buffer, sizeof(char), 1, x->fs );
+  int current=(x->buffer[0]=='1');
+  if (current!=x->set) {
+	t_float f=current;
+	outlet_float(x->x_obj.ob_outlet, f);
+	x->set=current;
+  }
+  fclose(x->fs);
+}
+
+void overo_gpioin_free(t_overo_gpioin *x)
+{
+	//
+}
+
+void *overo_gpioin_new(t_floatarg f)
+{
+    t_overo_gpioin *x = (t_overo_gpioin *)pd_new(overo_gpioin_class);
+    outlet_new(&x->x_obj, &s_float);
+	int nums[]={146,147};
+	x->gpioNum=nums[min(1,max(0,((int) f)-1))]; //maps switch number to GPIO number
+	post("overo_gpoin: using GPIO(%d): switch %d\n",x->gpioNum,min(2,max(1,(int) f)));
+	sprintf(x->inputfile,"/sys/class/gpio/gpio%d/value",x->gpioNum);
+	post("inputfile: %s\n",x->inputfile);
+
+	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);
+	//if (( 
+	x->fs = fopen( x->inputfile, "r" );
+	//) < 0 )
+	//{
+	//	error( "Unable to open inputfile" );
+	//	exit( 1 );
+	//}
+	t=fread( x->buffer, sizeof(char), 1, x->fs );
+	x->set=(x->buffer[0]=='1');
+	fclose(x->fs);
+    return (void *)x;
+}
+
+void overo_gpioin_setup(void)
+{
+  overo_gpioin_class = class_new(gensym("overo_gpioin"), (t_newmethod)overo_gpioin_new, (t_method)overo_gpioin_free, sizeof(t_overo_gpioin), 0, A_DEFFLOAT, 0);
+  class_addbang(overo_gpioin_class,overo_gpioin_bang);
+}