README: update .pdf and md: fix LRC calc

README.md

@@ -153,10 +153,10 @@ short berechneLRC(unsigned char* buffer, unsigned char size) {
     hByte = lrc >> 0x04;
     lByte = lrc & 0x0F;
 
-    if(hByte > 10) hByte += 0x37;
+    if(hByte >= 10) hByte += 0x37;
     else hByte += 0x30;
 
-    if(lByte > 10) lByte += 0x37;
+    if(lByte >= 10) lByte += 0x37;
     else lByte += 0x30;
 
     return (hByte << 8) | lByte;