Move new Class Driver powered demos to a new ClassDriver subdirectory, re-add old low level demos to a LowLevel subdirectory.
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Dean Camera
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Demos/Device/LowLevel/GenericHID/GenericHID.c
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Demos/Device/LowLevel/GenericHID/GenericHID.c
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Main source file for the GenericHID demo. This file contains the main tasks of the demo and
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* is responsible for the initial application hardware configuration.
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*/
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#include "GenericHID.h"
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/* Scheduler Task List */
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TASK_LIST
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{
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{ .Task = USB_USBTask , .TaskStatus = TASK_STOP },
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{ .Task = USB_HID_Report , .TaskStatus = TASK_STOP },
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};
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/** Static buffer to hold the last received report from the host, so that it can be echoed back in the next sent report */
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static uint8_t LastReceived[GENERIC_REPORT_SIZE];
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/** Main program entry point. This routine configures the hardware required by the application, then
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* starts the scheduler to run the USB management task.
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*/
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int main(void)
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{
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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/* Hardware Initialization */
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LEDs_Init();
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/* Indicate USB not ready */
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UpdateStatus(Status_USBNotReady);
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/* Initialize Scheduler so that it can be used */
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Scheduler_Init();
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/* Initialize USB Subsystem */
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USB_Init();
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/* Scheduling - routine never returns, so put this last in the main function */
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Scheduler_Start();
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}
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/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
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* starts the library USB task to begin the enumeration and USB management process.
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*/
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void EVENT_USB_Connect(void)
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{
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/* Start USB management task */
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Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
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/* Indicate USB enumerating */
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UpdateStatus(Status_USBEnumerating);
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}
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/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
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* the status LEDs and stops the USB management task.
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*/
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void EVENT_USB_Disconnect(void)
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{
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/* Stop running HID reporting and USB management tasks */
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Scheduler_SetTaskMode(USB_HID_Report, TASK_STOP);
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Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
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/* Indicate USB not ready */
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UpdateStatus(Status_USBNotReady);
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}
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/** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration
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* of the USB device after enumeration, and configures the generic HID device endpoints.
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*/
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void EVENT_USB_ConfigurationChanged(void)
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{
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/* Setup Generic IN Report Endpoint */
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Endpoint_ConfigureEndpoint(GENERIC_IN_EPNUM, EP_TYPE_INTERRUPT,
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ENDPOINT_DIR_IN, GENERIC_EPSIZE,
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ENDPOINT_BANK_SINGLE);
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/* Setup Generic OUT Report Endpoint */
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Endpoint_ConfigureEndpoint(GENERIC_OUT_EPNUM, EP_TYPE_INTERRUPT,
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ENDPOINT_DIR_OUT, GENERIC_EPSIZE,
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ENDPOINT_BANK_SINGLE);
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/* Indicate USB connected and ready */
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UpdateStatus(Status_USBReady);
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}
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/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific
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* control requests that are not handled internally by the USB library (including the HID commands, which are
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* all issued via the control endpoint), so that they can be handled appropriately for the application.
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*/
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void EVENT_USB_UnhandledControlPacket(void)
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{
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/* Handle HID Class specific requests */
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switch (USB_ControlRequest.bRequest)
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{
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case REQ_GetReport:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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uint8_t GenericData[GENERIC_REPORT_SIZE];
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Endpoint_ClearSETUP();
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CreateGenericHIDReport(GenericData);
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/* Write the report data to the control endpoint */
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Endpoint_Write_Control_Stream_LE(&GenericData, sizeof(GenericData));
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/* Finalize the stream transfer to send the last packet or clear the host abort */
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Endpoint_ClearOUT();
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}
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break;
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case REQ_SetReport:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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uint8_t GenericData[GENERIC_REPORT_SIZE];
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Endpoint_ClearSETUP();
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/* Wait until the generic report has been sent by the host */
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while (!(Endpoint_IsOUTReceived()));
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Endpoint_Read_Control_Stream_LE(&GenericData, sizeof(GenericData));
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ProcessGenericHIDReport(GenericData);
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/* Clear the endpoint data */
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Endpoint_ClearOUT();
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/* Wait until the host is ready to receive the request confirmation */
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while (!(Endpoint_IsINReady()));
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/* Handshake the request by sending an empty IN packet */
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Endpoint_ClearIN();
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}
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break;
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}
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}
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/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
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* log to a serial port, or anything else that is suitable for status updates.
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*
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* \param CurrentStatus Current status of the system, from the GenericHID_StatusCodes_t enum
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*/
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void UpdateStatus(uint8_t CurrentStatus)
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{
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uint8_t LEDMask = LEDS_NO_LEDS;
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/* Set the LED mask to the appropriate LED mask based on the given status code */
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switch (CurrentStatus)
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{
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case Status_USBNotReady:
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LEDMask = (LEDS_LED1);
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break;
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case Status_USBEnumerating:
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LEDMask = (LEDS_LED1 | LEDS_LED2);
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break;
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case Status_USBReady:
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LEDMask = (LEDS_LED2 | LEDS_LED4);
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break;
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}
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/* Set the board LEDs to the new LED mask */
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LEDs_SetAllLEDs(LEDMask);
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}
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/** Function to process the lest received report from the host.
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*
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* \param DataArray Pointer to a buffer where the last report data is stored
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*/
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void ProcessGenericHIDReport(uint8_t* DataArray)
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{
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/*
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This is where you need to process the reports being sent from the host to the device.
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DataArray is an array holding the last report from the host. This function is called
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each time the host has sent a report to the device.
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*/
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for (uint8_t i = 0; i < GENERIC_REPORT_SIZE; i++)
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LastReceived[i] = DataArray[i];
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}
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/** Function to create the next report to send back to the host at the next reporting interval.
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*
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* \param DataArray Pointer to a buffer where the next report data should be stored
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*/
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void CreateGenericHIDReport(uint8_t* DataArray)
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{
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/*
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This is where you need to create reports to be sent to the host from the device. This
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function is called each time the host is ready to accept a new report. DataArray is
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an array to hold the report to the host.
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*/
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for (uint8_t i = 0; i < GENERIC_REPORT_SIZE; i++)
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DataArray[i] = LastReceived[i];
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}
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TASK(USB_HID_Report)
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{
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/* Check if the USB system is connected to a host */
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if (USB_IsConnected)
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{
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Endpoint_SelectEndpoint(GENERIC_OUT_EPNUM);
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/* Check to see if a packet has been sent from the host */
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if (Endpoint_IsOUTReceived())
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{
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/* Check to see if the packet contains data */
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if (Endpoint_IsReadWriteAllowed())
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{
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/* Create a temporary buffer to hold the read in report from the host */
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uint8_t GenericData[GENERIC_REPORT_SIZE];
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/* Read Generic Report Data */
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Endpoint_Read_Stream_LE(&GenericData, sizeof(GenericData));
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/* Process Generic Report Data */
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ProcessGenericHIDReport(GenericData);
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}
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearOUT();
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}
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Endpoint_SelectEndpoint(GENERIC_IN_EPNUM);
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/* Check to see if the host is ready to accept another packet */
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if (Endpoint_IsINReady())
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{
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/* Create a temporary buffer to hold the report to send to the host */
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uint8_t GenericData[GENERIC_REPORT_SIZE];
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/* Create Generic Report Data */
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CreateGenericHIDReport(GenericData);
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/* Write Generic Report Data */
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Endpoint_Write_Stream_LE(&GenericData, sizeof(GenericData));
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearIN();
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}
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}
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}
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