Replace use of numeric literals with appropriate enums

src/avclandrv.c

@@ -82,7 +82,7 @@
     - The broadcast bit is `1` (floating, no effort) for normal communication
     - For acknowledge bits, the receiver extends the logical '0' of the sync
       period to the length of a normal bit `0`. Hence, a NAK (bit `1`) is
-      equivalent to no response.
+      literally the absence of an ACK.
 
   No acknowledge bits are sent for broadcast frames.
 

src/avclandrv.h

@@ -53,6 +53,7 @@ typedef enum {
 } commands;
 
 typedef enum {
+  dev_LAN = 0x00,
   dev_COMM_CTRL = 0x01,
   dev_COMM_v1 = 0x11,
   dev_COMM_v2 = 0x12,

src/sniffer.c

@@ -142,8 +142,8 @@ int main() {
         case 'b':
         case 'B': // Beep
           data_tmp[0] = 0x00;
-          data_tmp[1] = 0x63;
+          data_tmp[1] = dev_CD_CHANGER;
-          data_tmp[2] = 0x29;
+          data_tmp[2] = dev_BEEP_SPEAKERS;
           data_tmp[3] = 0x60;
           data_tmp[4] = 0x01;
           msg.length = 5;
@@ -155,10 +155,10 @@ int main() {
         case 'p':
           CD_Mode = stPlay;
           data_tmp[0] = 0x00;
-          data_tmp[1] = 0x01;
+          data_tmp[1] = dev_COMM_CTRL;
-          data_tmp[2] = 0x11;
+          data_tmp[2] = dev_COMM_v1;
-          data_tmp[3] = 0x50;
+          data_tmp[3] = Insertion;
-          data_tmp[4] = 0x63;
+          data_tmp[4] = dev_CD_CHANGER;
           msg.length = 5;
           msg.broadcast = UNICAST;
           msg.controller_addr = DEVICE_ADDR;