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372 lines
12 KiB
372 lines
12 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2013.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all 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 disclaims 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 Keyboard 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 "Keyboard.h"
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/** Indicates what report mode the host has requested, true for normal HID reporting mode, \c false for special boot
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* protocol reporting mode.
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*/
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static bool UsingReportProtocol = true;
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/** Current Idle period. This is set by the host via a Set Idle HID class request to silence the device's reports
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* for either the entire idle duration, or until the report status changes (e.g. the user presses a key).
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*/
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static uint16_t IdleCount = 500;
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/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle
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* milliseconds. This is separate to the IdleCount timer and is incremented and compared as the host may request
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* the current idle period via a Get Idle HID class request, thus its value must be preserved.
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*/
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static uint16_t IdleMSRemaining = 0;
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/** Main program entry point. This routine configures the hardware required by the application, then
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* enters a loop to run the application tasks in sequence.
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*/
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int main(void)
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{
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SetupHardware();
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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GlobalInterruptEnable();
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for (;;)
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{
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HID_Task();
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USB_USBTask();
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}
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}
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/** Configures the board hardware and chip peripherals for the demo's functionality. */
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void SetupHardware(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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Joystick_Init();
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LEDs_Init();
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USB_Init();
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Buttons_Init();
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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_Device_Connect(void)
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{
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/* Indicate USB enumerating */
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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/* Default to report protocol on connect */
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UsingReportProtocol = true;
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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.
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*/
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void EVENT_USB_Device_Disconnect(void)
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{
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/* Indicate USB not ready */
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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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 keyboard device endpoints.
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*/
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void EVENT_USB_Device_ConfigurationChanged(void)
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{
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bool ConfigSuccess = true;
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/* Setup HID Report Endpoints */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_IN_EPADDR, EP_TYPE_INTERRUPT, KEYBOARD_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_OUT_EPADDR, EP_TYPE_INTERRUPT, KEYBOARD_EPSIZE, 1);
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/* Turn on Start-of-Frame events for tracking HID report period expiry */
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USB_Device_EnableSOFEvents();
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/* Indicate endpoint configuration success or failure */
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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}
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/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
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* the device from the USB host before passing along unhandled control requests to the library for processing
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* internally.
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*/
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void EVENT_USB_Device_ControlRequest(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 HID_REQ_GetReport:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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USB_KeyboardReport_Data_t KeyboardReportData;
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/* Create the next keyboard report for transmission to the host */
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CreateKeyboardReport(&KeyboardReportData);
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Endpoint_ClearSETUP();
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/* Write the report data to the control endpoint */
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Endpoint_Write_Control_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData));
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Endpoint_ClearOUT();
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}
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break;
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case HID_REQ_SetReport:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Wait until the LED report has been sent by the host */
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while (!(Endpoint_IsOUTReceived()))
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{
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if (USB_DeviceState == DEVICE_STATE_Unattached)
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return;
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}
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/* Read in the LED report from the host */
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uint8_t LEDStatus = Endpoint_Read_8();
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Endpoint_ClearOUT();
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Endpoint_ClearStatusStage();
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/* Process the incoming LED report */
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ProcessLEDReport(LEDStatus);
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}
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break;
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case HID_REQ_GetProtocol:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Write the current protocol flag to the host */
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Endpoint_Write_8(UsingReportProtocol);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case HID_REQ_SetProtocol:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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Endpoint_ClearStatusStage();
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/* Set or clear the flag depending on what the host indicates that the current Protocol should be */
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UsingReportProtocol = (USB_ControlRequest.wValue != 0);
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}
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break;
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case HID_REQ_SetIdle:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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Endpoint_ClearStatusStage();
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/* Get idle period in MSB, IdleCount must be multiplied by 4 to get number of milliseconds */
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IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
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}
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break;
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case HID_REQ_GetIdle:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Write the current idle duration to the host, must be divided by 4 before sent to host */
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Endpoint_Write_8(IdleCount >> 2);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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}
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}
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/** Event handler for the USB device Start Of Frame event. */
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void EVENT_USB_Device_StartOfFrame(void)
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{
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/* One millisecond has elapsed, decrement the idle time remaining counter if it has not already elapsed */
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if (IdleMSRemaining)
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IdleMSRemaining--;
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}
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/** Fills the given HID report data structure with the next HID report to send to the host.
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*
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* \param[out] ReportData Pointer to a HID report data structure to be filled
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*/
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void CreateKeyboardReport(USB_KeyboardReport_Data_t* const ReportData)
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{
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uint8_t JoyStatus_LCL = Joystick_GetStatus();
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uint8_t ButtonStatus_LCL = Buttons_GetStatus();
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uint8_t UsedKeyCodes = 0;
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/* Clear the report contents */
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memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t));
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/* Make sent key uppercase by indicating that the left shift key is pressed */
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ReportData->Modifier = HID_KEYBOARD_MODIFIER_LEFTSHIFT;
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if (JoyStatus_LCL & JOY_UP)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_A;
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else if (JoyStatus_LCL & JOY_DOWN)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_B;
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if (JoyStatus_LCL & JOY_LEFT)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_C;
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else if (JoyStatus_LCL & JOY_RIGHT)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_D;
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if (JoyStatus_LCL & JOY_PRESS)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_E;
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if (ButtonStatus_LCL & BUTTONS_BUTTON1)
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ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_F;
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}
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/** Processes a received LED report, and updates the board LEDs states to match.
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*
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* \param[in] LEDReport LED status report from the host
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*/
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void ProcessLEDReport(const uint8_t LEDReport)
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{
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uint8_t LEDMask = LEDS_LED2;
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if (LEDReport & HID_KEYBOARD_LED_NUMLOCK)
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LEDMask |= LEDS_LED1;
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if (LEDReport & HID_KEYBOARD_LED_CAPSLOCK)
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LEDMask |= LEDS_LED3;
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if (LEDReport & HID_KEYBOARD_LED_SCROLLLOCK)
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LEDMask |= LEDS_LED4;
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/* Set the status LEDs to the current Keyboard LED status */
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LEDs_SetAllLEDs(LEDMask);
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}
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/** Sends the next HID report to the host, via the keyboard data endpoint. */
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void SendNextReport(void)
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{
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static USB_KeyboardReport_Data_t PrevKeyboardReportData;
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USB_KeyboardReport_Data_t KeyboardReportData;
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bool SendReport = false;
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/* Create the next keyboard report for transmission to the host */
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CreateKeyboardReport(&KeyboardReportData);
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/* Check if the idle period is set and has elapsed */
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if (IdleCount && (!(IdleMSRemaining)))
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{
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/* Reset the idle time remaining counter */
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IdleMSRemaining = IdleCount;
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/* Idle period is set and has elapsed, must send a report to the host */
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SendReport = true;
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}
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else
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{
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/* Check to see if the report data has changed - if so a report MUST be sent */
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SendReport = (memcmp(&PrevKeyboardReportData, &KeyboardReportData, sizeof(USB_KeyboardReport_Data_t)) != 0);
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}
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/* Select the Keyboard Report Endpoint */
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Endpoint_SelectEndpoint(KEYBOARD_IN_EPADDR);
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/* Check if Keyboard Endpoint Ready for Read/Write and if we should send a new report */
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if (Endpoint_IsReadWriteAllowed() && SendReport)
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{
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/* Save the current report data for later comparison to check for changes */
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PrevKeyboardReportData = KeyboardReportData;
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/* Write Keyboard Report Data */
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Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData), NULL);
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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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/** Reads the next LED status report from the host from the LED data endpoint, if one has been sent. */
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void ReceiveNextReport(void)
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{
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/* Select the Keyboard LED Report Endpoint */
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Endpoint_SelectEndpoint(KEYBOARD_OUT_EPADDR);
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/* Check if Keyboard LED Endpoint contains a packet */
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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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/* Read in the LED report from the host */
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uint8_t LEDReport = Endpoint_Read_8();
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/* Process the read LED report from the host */
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ProcessLEDReport(LEDReport);
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}
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/* Handshake the OUT Endpoint - clear endpoint and ready for next report */
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Endpoint_ClearOUT();
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}
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}
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/** Function to manage HID report generation and transmission to the host, when in report mode. */
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void HID_Task(void)
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{
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/* Device must be connected and configured for the task to run */
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if (USB_DeviceState != DEVICE_STATE_Configured)
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return;
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/* Send the next keypress report to the host */
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SendNextReport();
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/* Process the LED report sent from the host */
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ReceiveNextReport();
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}
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