Debug flag

git-svn-id: http://svn.code.sf.net/p/lejos/code/trunk@6796 06c8f799-c779-4783-8af7-179afedb67c8

rpi/rpijni/sensorport.c

@@ -13,13 +13,15 @@
 #include "lejos_nxt_SensorPort.h"
 #include "lejos_nxt_NXTEvent.h"
 
+#define debug 0
+
 int fd;														// File description
 char *fileName = "/dev/i2c-0";								// Name of the port we will be using
 
 JNIEXPORT void JNICALL Java_lejos_nxt_SensorPort_i2cEnableById
   (JNIEnv *env, jclass cls, jint id, jint mode)
 {
-  printf("Enabling port %d in mode %d\n",id,mode);
+  if (debug) printf("Enabling port %d in mode %d\n",id,mode);
   if ((fd = open(fileName, O_RDWR)) < 0) {					// Open port for reading and writing
 	printf("Failed to open i2c port\n");
 	exit(1);
@@ -29,20 +31,20 @@ JNIEXPORT void JNICALL Java_lejos_nxt_SensorPort_i2cEnableById
 JNIEXPORT void JNICALL Java_lejos_nxt_SensorPort_i2cDisableById
   (JNIEnv *env, jclass cls, jint id) 
 {
-  printf("Disabling port %d\n",id);
+  if (debug) printf("Disabling port %d\n",id);
   close(fd);
 }
 
 JNIEXPORT jint JNICALL Java_lejos_nxt_SensorPort_i2cStartById
   (JNIEnv *env, jclass cls, jint id, jint addr, jbyteArray buf, jint offset, jint wlen, jint rlen)
 {
-  printf("Writing %d bytes on port %d at address %d\n",wlen,id,addr);
+  if (debug)printf("Writing %d bytes on port %d at address %d\n",wlen,id,addr);
   if (ioctl(fd, I2C_SLAVE, (addr >> 1)) < 0) {	// Set the port options and set the address of the device we wish to speak to
 	printf("Unable to get bus access to talk to slave\n");
 	exit(1);
   }
   char *jb = (char *) (*env)->GetByteArrayElements(env, buf, 0); 
-  printf("First byte is %d\n",*jb);
+  if (debug) printf("First byte is %d\n",*jb);
   if ((write(fd, jb, wlen)) != wlen) {	// Send the register to read from
 	printf("Error writing to i2c slave - %s\n",strerror(errno));
 	exit(1);
@@ -54,7 +56,7 @@ JNIEXPORT jint JNICALL Java_lejos_nxt_SensorPort_i2cStartById
 JNIEXPORT jint JNICALL Java_lejos_nxt_SensorPort_i2cCompleteById
   (JNIEnv *env, jclass cls, jint id, jbyteArray buf, jint offset, jint rlen) 
 {
-  printf("Reading %d bytes from port %d\n",rlen,id);
+  if (debug) printf("Reading %d bytes from port %d\n",rlen,id);
   if (rlen > 0) {
     char *jb = (char *) (*env)->GetByteArrayElements(env, buf, 0);
   	if (read(fd, jb, rlen) != rlen) {	// Read back data into buf[]