1 files changed, 12 insertions, 4 deletions

diff --git a/src/main.c b/src/main.c
index 383884d..2ff69a8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -61,21 +61,29 @@ void print_help(void) {
 }
 
 void bus_err(int ern){
-    printf("I2C communication(rd) error. errno: %d\n",errno);
+    //printf("I2C communication(rd) error. errno: %d\n",errno);
+    fprintf (stderr, "Internal error %d at %s, line %d. (function: %s/%s)", ern, __FILE__, __LINE__, __func__, __FUNCTION__);
+}
+void bus_errr(int ern){
+    //printf("I2C communication(rd) error. errno: %d\n",errno);
+    fprintf (stderr, "Internal error %d at %s, line %d. (function: %s/%s)", errno, __FILE__, __LINE__, __func__, __FUNCTION__);
 }
-
 
 uchar   *xchg_data  (uchar *buf, uint16 wrlen, uint16 waitlen, uint16 rdlen){                     //# [buf] = 32 byte         
 
 	if(write(devicef, buf, 1) != 1){                //# write one byte to device
         perror("I2C communication(wrr) error.");
-        printf("errno: %d\n",errno);
+        fprintf (stderr, "I2C error (WR) %d at %s, line %d. (function: %s/%s)", errno, __FILE__, __LINE__, __func__, __FUNCTION__);
+        bus_err(errno);
+        bus_errr(0);
     }
     usleep(waitlen*1000);                                //# Wait 10ms for reading
 
     if(read(devicef, buf, rdlen) != rdlen) {                //# read the result
         perror("I2C communication(rd) error.");
-        printf("errno: %d\n",errno);
+        fprintf (stderr, "I2C error (WR) %d at %s, line %d. (function: %s/%s)", errno, __FILE__, __LINE__, __func__, __FUNCTION__);
+        bus_err(errno);
+        bus_errr(0);
     }
     return buf; 
 }