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430 lines
14 KiB
430 lines
14 KiB
/*
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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 Denver Gingerich (denver [at] ossguy [dot] com)
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Based on code by 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 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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/* Project Tags, for reading out using the ButtLoad project */
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BUTTLOADTAG(ProjName, "LUFA Keyboard App");
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BUTTLOADTAG(BuildTime, __TIME__);
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BUTTLOADTAG(BuildDate, __DATE__);
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BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);
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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_Keyboard_Report , TaskStatus: TASK_STOP },
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};
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/* Global Variables */
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/** Indicates what report mode the host has requested, true for normal HID reporting mode, false for special boot
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* protocol reporting mode.
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*/
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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 moves the mouse).
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*/
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uint8_t IdleCount = 0;
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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 seperate 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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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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* starts the scheduler to run the application tasks.
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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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SetSystemClockPrescaler(0);
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/* Hardware Initialization */
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Joystick_Init();
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LEDs_Init();
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/* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */
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OCR0A = 0x7D;
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TCCR0A = (1 << WGM01);
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TCCR0B = ((1 << CS01) | (1 << CS00));
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TIMSK0 = (1 << OCIE0A);
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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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EVENT_HANDLER(USB_Connect)
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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 and Keyboard reporting tasks.
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*/
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EVENT_HANDLER(USB_Disconnect)
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{
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/* Stop running keyboard reporting and USB management tasks */
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Scheduler_SetTaskMode(USB_Keyboard_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 set the current configuration
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* of the USB device after enumeration - the device endpoints are configured and the keyboard reporting task started.
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*/
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EVENT_HANDLER(USB_ConfigurationChanged)
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{
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/* Setup Keyboard Keycode Report Endpoint */
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Endpoint_ConfigureEndpoint(KEYBOARD_EPNUM, EP_TYPE_INTERRUPT,
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ENDPOINT_DIR_IN, KEYBOARD_EPSIZE,
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ENDPOINT_BANK_SINGLE);
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/* Setup Keyboard LED Report Endpoint */
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Endpoint_ConfigureEndpoint(KEYBOARD_LEDS_EPNUM, EP_TYPE_INTERRUPT,
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ENDPOINT_DIR_OUT, KEYBOARD_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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/* Default to report protocol on connect */
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UsingReportProtocol = true;
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/* Start Keyboard reporting task */
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Scheduler_SetTaskMode(USB_Keyboard_Report, TASK_RUN);
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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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EVENT_HANDLER(USB_UnhandledControlPacket)
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{
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/* Handle HID Class specific requests */
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switch (bRequest)
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{
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case REQ_GetReport:
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if (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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GetNextReport(&KeyboardReportData);
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/* Ignore report type and ID number value */
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Endpoint_Discard_Word();
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/* Ignore unused Interface number value */
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Endpoint_Discard_Word();
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/* Read in the number of bytes in the report to send to the host */
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uint16_t wLength = Endpoint_Read_Word_LE();
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/* If trying to send more bytes than exist to the host, clamp the value at the report size */
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if (wLength > sizeof(KeyboardReportData))
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wLength = sizeof(KeyboardReportData);
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Endpoint_ClearSetupReceived();
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/* Write the report data to the control endpoint */
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Endpoint_Write_Control_Stream_LE(&KeyboardReportData, wLength);
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/* Finalize the stream transfer to send the last packet or clear the host abort */
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Endpoint_ClearSetupOUT();
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}
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break;
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case REQ_SetReport:
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if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSetupReceived();
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/* Wait until the LED report has been sent by the host */
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while (!(Endpoint_IsSetupOUTReceived()));
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/* Read in the LED report from the host */
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uint8_t LEDStatus = Endpoint_Read_Byte();
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/* Process the incomming LED report */
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ProcessLEDReport(LEDStatus);
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/* Clear the endpoint data */
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Endpoint_ClearSetupOUT();
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/* Wait until the host is ready to receive the request confirmation */
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while (!(Endpoint_IsSetupINReady()));
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/* Handshake the request by sending an empty IN packet */
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Endpoint_ClearSetupIN();
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}
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break;
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case REQ_GetProtocol:
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if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSetupReceived();
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/* Write the current protocol flag to the host */
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Endpoint_Write_Byte(UsingReportProtocol);
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/* Send the flag to the host */
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Endpoint_ClearSetupIN();
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}
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break;
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case REQ_SetProtocol:
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if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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/* Read in the wValue parameter containing the new protocol mode */
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uint16_t wValue = Endpoint_Read_Word_LE();
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Endpoint_ClearSetupReceived();
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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 = (wValue != 0x0000);
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/* Send an empty packet to acknowedge the command */
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Endpoint_ClearSetupIN();
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}
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break;
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case REQ_SetIdle:
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if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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/* Read in the wValue parameter containing the idle period */
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uint16_t wValue = Endpoint_Read_Word_LE();
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Endpoint_ClearSetupReceived();
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/* Get idle period in MSB */
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IdleCount = (wValue >> 8);
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/* Send an empty packet to acknowedge the command */
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Endpoint_ClearSetupIN();
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}
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break;
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case REQ_GetIdle:
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if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSetupReceived();
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/* Write the current idle duration to the host */
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Endpoint_Write_Byte(IdleCount);
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/* Send the flag to the host */
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Endpoint_ClearSetupIN();
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}
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break;
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}
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}
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/** ISR for the timer 0 compare vector. This ISR fires once each millisecond, and increments the
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* scheduler elapsed idle period counter when the host has set an idle period.
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*/
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ISR(TIMER0_COMPA_vect, ISR_BLOCK)
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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 ReportData Pointer to a HID report data structure to be filled
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*
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* \return Boolean true if the new report differs from the last report, false otherwise
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*/
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bool GetNextReport(USB_KeyboardReport_Data_t* ReportData)
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{
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static uint8_t PrevJoyStatus = 0;
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uint8_t JoyStatus_LCL = Joystick_GetStatus();
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bool InputChanged = false;
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/* Clear the report contents */
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memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t));
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if (JoyStatus_LCL & JOY_UP)
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ReportData->KeyCode[0] = 0x04; // A
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else if (JoyStatus_LCL & JOY_DOWN)
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ReportData->KeyCode[0] = 0x05; // B
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if (JoyStatus_LCL & JOY_LEFT)
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ReportData->KeyCode[0] = 0x06; // C
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else if (JoyStatus_LCL & JOY_RIGHT)
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ReportData->KeyCode[0] = 0x07; // D
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if (JoyStatus_LCL & JOY_PRESS)
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ReportData->KeyCode[0] = 0x08; // E
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/* Check if the new report is different to the previous report */
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InputChanged = (uint8_t)(PrevJoyStatus ^ JoyStatus_LCL);
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/* Save the current joystick status for later comparison */
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PrevJoyStatus = JoyStatus_LCL;
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/* Return whether the new report is different to the previous report or not */
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return InputChanged;
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}
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/** Processes a given LED report mask from the host and sets the board LEDs to match.
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*
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* \param LEDReport LED mask from the host, containing a mask of what LEDs are set
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*/
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void ProcessLEDReport(uint8_t LEDReport)
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{
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uint8_t LEDMask = LEDS_LED2;
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if (LEDReport & 0x01) // NUM Lock
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LEDMask |= LEDS_LED1;
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if (LEDReport & 0x02) // CAPS Lock
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LEDMask |= LEDS_LED3;
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if (LEDReport & 0x04) // SCROLL Lock
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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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/** 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 Keyboard_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 manage HID report generation and transmission to the host, when in report mode. */
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TASK(USB_Keyboard_Report)
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{
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USB_KeyboardReport_Data_t KeyboardReportData;
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bool SendReport;
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/* Create the next keyboard report for transmission to the host */
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SendReport = GetNextReport(&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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/* Idle period elapsed, indicate that a report must be sent */
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SendReport = true;
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/* Reset the idle time remaining counter, must multiply by 4 to get the duration in milliseconds */
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IdleMSRemaining = (IdleCount << 2);
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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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/* Select the Keyboard Report Endpoint */
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Endpoint_SelectEndpoint(KEYBOARD_EPNUM);
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/* Check if Keyboard Endpoint Ready for Read/Write, and if we should send a report */
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if (Endpoint_ReadWriteAllowed() && SendReport)
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{
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/* Write Keyboard Report Data */
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Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData));
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearCurrentBank();
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}
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/* Select the Keyboard LED Report Endpoint */
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Endpoint_SelectEndpoint(KEYBOARD_LEDS_EPNUM);
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/* Check if Keyboard LED Endpoint Ready for Read/Write */
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if (Endpoint_ReadWriteAllowed())
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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_Byte();
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/* Process the incomming LED report */
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ProcessLEDReport(LEDStatus);
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/* Handshake the OUT Endpoint - clear endpoint and ready for next report */
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Endpoint_ClearCurrentBank();
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}
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}
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}
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