+ // Pointer to USB tx packet buffer
+ uint8_t *tx_buf = tx_packet->buf;
+
+ // Check system control keys
+ if ( USBKeys_Changed & USBKeyChangeState_System )
+ {
+ if ( Output_DebugMode )
+ {
+ print("SysCtrl[");
+ printHex_op( USBKeys_SysCtrl, 2 );
+ print( "] " NL );
+ }
+
+ *tx_buf++ = 0x02; // ID
+ *tx_buf = USBKeys_SysCtrl;
+ tx_packet->len = 2;
+
+ // Send USB Packet
+ usb_tx( SYS_CTRL_ENDPOINT, tx_packet );
+ USBKeys_Changed &= ~USBKeyChangeState_System; // Mark sent
+ return;
+ }
+
+ // Check consumer control keys
+ if ( USBKeys_Changed & USBKeyChangeState_Consumer )
+ {
+ if ( Output_DebugMode )
+ {
+ print("ConsCtrl[");
+ printHex_op( USBKeys_ConsCtrl, 2 );
+ print( "] " NL );
+ }
+
+ *tx_buf++ = 0x03; // ID
+ *tx_buf++ = (uint8_t)(USBKeys_ConsCtrl & 0x00FF);
+ *tx_buf = (uint8_t)(USBKeys_ConsCtrl >> 8);
+ tx_packet->len = 3;
+
+ // Send USB Packet
+ usb_tx( SYS_CTRL_ENDPOINT, tx_packet );
+ USBKeys_Changed &= ~USBKeyChangeState_Consumer; // Mark sent
+ return;
+ }
+
+ switch ( USBKeys_Protocol )
+ {
+ // Send boot keyboard interrupt packet(s)
+ case 0:
+ // USB Boot Mode debug output
+ if ( Output_DebugMode )
+ {
+ dbug_msg("Boot USB: ");
+ printHex_op( USBKeys_Modifiers, 2 );
+ print(" ");
+ printHex( 0 );
+ print(" ");
+ printHex_op( USBKeys_Keys[0], 2 );
+ printHex_op( USBKeys_Keys[1], 2 );
+ printHex_op( USBKeys_Keys[2], 2 );
+ printHex_op( USBKeys_Keys[3], 2 );
+ printHex_op( USBKeys_Keys[4], 2 );
+ printHex_op( USBKeys_Keys[5], 2 );
+ print( NL );
+ }
+
+ // Boot Mode
+ *tx_buf++ = USBKeys_Modifiers;
+ *tx_buf++ = 0;
+ memcpy( tx_buf, USBKeys_Keys, USB_BOOT_MAX_KEYS );
+ tx_packet->len = 8;
+
+ // Send USB Packet
+ usb_tx( KEYBOARD_ENDPOINT, tx_packet );
+ USBKeys_Changed = USBKeyChangeState_None;
+ break;
+
+ // Send NKRO keyboard interrupts packet(s)
+ case 1:
+ if ( Output_DebugMode )
+ {
+ dbug_msg("NKRO USB: ");
+ }
+
+ // Standard HID Keyboard
+ if ( USBKeys_Changed )
+ {
+ // USB NKRO Debug output
+ if ( Output_DebugMode )
+ {
+ printHex_op( USBKeys_Modifiers, 2 );
+ print(" ");
+ for ( uint8_t c = 0; c < 6; c++ )
+ printHex_op( USBKeys_Keys[ c ], 2 );
+ print(" ");
+ for ( uint8_t c = 6; c < 20; c++ )
+ printHex_op( USBKeys_Keys[ c ], 2 );
+ print(" ");
+ printHex_op( USBKeys_Keys[20], 2 );
+ print(" ");
+ for ( uint8_t c = 21; c < 27; c++ )
+ printHex_op( USBKeys_Keys[ c ], 2 );
+ print( NL );
+ }
+
+ tx_packet->len = 0;
+
+ // Modifiers
+ *tx_buf++ = 0x01; // ID
+ *tx_buf++ = USBKeys_Modifiers;
+ tx_packet->len += 2;
+
+ // 4-49 (first 6 bytes)
+ memcpy( tx_buf, USBKeys_Keys, 6 );
+ tx_buf += 6;
+ tx_packet->len += 6;
+
+ // 51-155 (Middle 14 bytes)
+ memcpy( tx_buf, USBKeys_Keys + 6, 14 );
+ tx_buf += 14;
+ tx_packet->len += 14;