-/** Task to set the configuration of the attached device after it has been enumerated. */
-void Android_Host_Task(void)
-{
- uint8_t ErrorCode;
-
- switch (USB_HostState)
- {
- case HOST_STATE_Addressed:
- puts_P(PSTR("Getting Device Data.\r\n"));
-
- /* Get and process the configuration descriptor data */
- ErrorCode = ProcessDeviceDescriptor();
-
- /* Save whether the Android device needs to be mode-switched later on */
- bool RequiresModeSwitch = (ErrorCode == NonAccessoryModeAndroidDevice);
-
- /* Error out if the device is not an Android device or an error occurred */
- if ((ErrorCode != AccessoryModeAndroidDevice) && !(RequiresModeSwitch))
- {
- if (ErrorCode == DevControlError)
- puts_P(PSTR(ESC_FG_RED "Control Error (Get Device).\r\n"));
- else
- puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
-
- printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
-
- /* Indicate error via status LEDs */
- LEDs_SetAllLEDs(LEDS_LED1);
-
- /* Wait until USB device disconnected */
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;
- break;
- }
-
- printf_P(PSTR("Android Device Detected - %sAccessory mode.\r\n"), (RequiresModeSwitch ? "Non-" : ""));
-
- /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
- if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
- {
- printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
- " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
-
- /* Indicate error via status LEDs */
- LEDs_SetAllLEDs(LEDS_LED1);
-
- /* Wait until USB device disconnected */
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;
- break;
- }
-
- /* Check if a valid Android device was attached, but it is not current in Accessory mode */
- if (RequiresModeSwitch)
- {
- USB_ControlRequest = (USB_Request_Header_t)
- {
- .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_VENDOR | REQREC_DEVICE),
- .bRequest = ANDROID_Req_StartAccessoryMode,
- .wValue = 0,
- .wIndex = 0,
- .wLength = 0,
- };
-
- /* Send the control request for the Android device to switch to accessory mode */
- Pipe_SelectPipe(PIPE_CONTROLPIPE);
- USB_Host_SendControlRequest(NULL);
-
- /* Wait until USB device disconnected */
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;
- break;
- }
-
- puts_P(PSTR("Getting Config Data.\r\n"));
-
- /* Get and process the configuration descriptor data */
- if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
- {
- if (ErrorCode == ControlError)
- puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
- else
- puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
-
- printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
-
- /* Indicate error via status LEDs */
- LEDs_SetAllLEDs(LEDS_LED1);
-
- /* Wait until USB device disconnected */
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;
- break;
- }
-
- puts_P(PSTR("Accessory Mode Android Enumerated.\r\n"));
-
- USB_HostState = HOST_STATE_Configured;
- break;
- case HOST_STATE_Configured:
- /* Select the data IN pipe */
- Pipe_SelectPipe(ANDROID_DATA_IN_PIPE);
- Pipe_Unfreeze();
-
- /* Check to see if a packet has been received */
- if (Pipe_IsINReceived())
- {
- /* Re-freeze IN pipe after the packet has been received */
- Pipe_Freeze();
-
- /* Check if data is in the pipe */
- if (Pipe_IsReadWriteAllowed())
- {
- uint8_t NextReceivedByte = Pipe_BytesInPipe();
- uint8_t LEDMask = LEDS_NO_LEDS;
-
- if (NextReceivedByte & 0x01)
- LEDMask |= LEDS_LED1;
-
- if (NextReceivedByte & 0x02)
- LEDMask |= LEDS_LED2;
-
- if (NextReceivedByte & 0x04)
- LEDMask |= LEDS_LED3;
-
- if (NextReceivedByte & 0x08)
- LEDMask |= LEDS_LED4;
-
- LEDs_SetAllLEDs(LEDMask);
- }
- else
- {
- /* Clear the pipe after all data in the packet has been read, ready for the next packet */
- Pipe_ClearIN();
- }
- }
-
- /* Re-freeze IN pipe after use */
- Pipe_Freeze();
- break;
- }
-}
-