Merge pull request #7250 from smlng/sys/phydat/enh_scale2str

sys, phydat: omit scale to string conversion if not applicable

Author: haukepetersen

sys/phydat/phydat_str.c

@@ -32,7 +32,22 @@ void phydat_dump(phydat_t *data, uint8_t dim)
     }
     printf("Data:");
     for (uint8_t i = 0; i < dim; i++) {
-        char scale_str = phydat_scale_to_str(data->scale);
+        char scale_str;
+
+        switch (data->unit) {
+            case UNIT_UNDEF:
+            case UNIT_NONE:
+            case UNIT_M2:
+            case UNIT_M3:
+            case UNIT_PERCENT:
+            case UNIT_TEMP_C:
+            case UNIT_TEMP_F:
+                /* no string conversion */
+                scale_str = '\0';
+                break;
+            default:
+                scale_str = phydat_scale_to_str(data->scale);
+        }
 
         printf("\t[%i] ", (int)i);