Add system properties.

right/src/system_properties.h

@@ -0,0 +1,11 @@
+#ifndef __SYSTEM_PROPERTIES_H__
+#define __SYSTEM_PROPERTIES_H__
+
+// Macros:
+
+    #define SYSTEM_PROPERTY_USB_PROTOCOL_VERSION      1
+    #define SYSTEM_PROPERTY_BRIDGE_PROTOCOL_VERSION   1
+    #define SYSTEM_PROPERTY_DATA_MODEL_VERSION        1
+    #define SYSTEM_PROPERTY_FIRMWARE_VERSION          1
+
+#endif

right/src/usb_protocol_handler.c

@@ -1,18 +1,41 @@
 #include "usb_protocol_handler.h"
+#include "system_properties.h"
 #include "test_led.h"
 
-void GetProtocolVersion();
+void SetError(uint8_t error);
+void SetGenericError();
+void UsbProtocolHandler();
+void GetSystemProperty();
 void JumpToBootloader();
 void GetSetTestLed();
 void WriteLedDriver();
 void ReadLedDriver();
 
+// Functions for setting error statuses
+
+void SetError(uint8_t error) {
+    GenericHidOutBuffer[0] = error;
+}
+
+void SetGenericError()
+{
+    SetError(PROTOCOL_RESPONSE_GENERIC_ERROR);
+}
+
+// Set a single byte as the response.
+void SetResponseByte(uint8_t response)
+{
+    GenericHidOutBuffer[1] = response;
+}
+
+// The main protocol handler function
+
 void UsbProtocolHandler()
 {
     uint8_t command = GenericHidInBuffer[0];
     switch (command) {
-        case USB_COMMAND_GET_PROTOCOL_VERSION:
+        case USB_COMMAND_GET_SYSTEM_PROPERTY:
-            GetProtocolVersion();
+            GetSystemProperty();
             break;
         case USB_COMMAND_JUMP_TO_BOOTLOADER:
             JumpToBootloader();
@@ -31,8 +54,28 @@ void UsbProtocolHandler()
     }
 }
 
-void GetProtocolVersion() {
+// Per command protocol command handlers
-    GenericHidOutBuffer[1] = 1;
+
+void GetSystemProperty() {
+    uint8_t propertyId = GenericHidInBuffer[1];
+
+    switch (propertyId) {
+        case SYSTEM_PROPERTY_USB_PROTOCOL_VERSION_ID:
+            SetResponseByte(SYSTEM_PROPERTY_USB_PROTOCOL_VERSION);
+            break;
+        case SYSTEM_PROPERTY_BRIDGE_PROTOCOL_VERSION_ID:
+            SetResponseByte(SYSTEM_PROPERTY_BRIDGE_PROTOCOL_VERSION);
+            break;
+        case SYSTEM_PROPERTY_DATA_MODEL_VERSION_ID:
+            SetResponseByte(SYSTEM_PROPERTY_DATA_MODEL_VERSION);
+            break;
+        case SYSTEM_PROPERTY_FIRMWARE_VERSION_ID:
+            SetResponseByte(SYSTEM_PROPERTY_FIRMWARE_VERSION);
+            break;
+        default:
+            SetGenericError();
+            break;
+    }
 }
 
 void JumpToBootloader() {

right/src/usb_protocol_handler.h

@@ -7,11 +7,18 @@
 
 // Macros:
 
-    #define USB_COMMAND_GET_PROTOCOL_VERSION 0
+    #define PROTOCOL_RESPONSE_SUCCESS       0
-    #define USB_COMMAND_JUMP_TO_BOOTLOADER   1
+    #define PROTOCOL_RESPONSE_GENERIC_ERROR 1
-    #define USB_COMMAND_TEST_LED             2
+
-    #define USB_COMMAND_WRITE_LED_DRIVER     3
+    #define USB_COMMAND_GET_SYSTEM_PROPERTY 0
-    #define USB_COMMAND_READ_LED_DRIVER      4
+        #define SYSTEM_PROPERTY_USB_PROTOCOL_VERSION_ID      0
+        #define SYSTEM_PROPERTY_BRIDGE_PROTOCOL_VERSION_ID   1
+        #define SYSTEM_PROPERTY_DATA_MODEL_VERSION_ID        2
+        #define SYSTEM_PROPERTY_FIRMWARE_VERSION_ID          3
+    #define USB_COMMAND_JUMP_TO_BOOTLOADER  1
+    #define USB_COMMAND_TEST_LED            2
+    #define USB_COMMAND_WRITE_LED_DRIVER    3
+    #define USB_COMMAND_READ_LED_DRIVER     4
 
 // Functions: