CHG: `lf em` - added @marshmellow42 's changes

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index cef643576b4eaf26c0b323d2cdf14bd0a8bca4ae..6c3c06a3421b48c23171c0061f911262bd759544 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -74,6 +74,36 @@ int32_t le24toh (uint8_t data[3]) {
     return (data[2] << 16) | (data[1] << 8) | data[0];
 }
 
+//convert hex digit to integer
+uint8_t hex2int(char hexchar){
+    switch(hexchar){
+        case '0': return 0; break;
+        case '1': return 1; break;
+        case '2': return 2; break;
+        case '3': return 3; break;
+        case '4': return 4; break;
+        case '5': return 5; break;
+        case '6': return 6; break;
+        case '7': return 7; break;
+        case '8': return 8; break;
+        case '9': return 9; break;
+        case 'a':
+        case 'A': return 10; break;
+        case 'b':
+               case 'B': return 11; break;
+        case 'c':
+        case 'C': return 12; break;
+        case 'd':
+               case 'D': return 13; break;
+        case 'e':
+        case 'E': return 14; break;
+        case 'f':
+        case 'F': return 15; break;
+        default:
+            return 0;
+    }
+}
+
 void LEDsoff() {
        LED_A_OFF();
        LED_B_OFF();