--- /dev/null
+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2009.\r
+ \r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.fourwalledcubicle.com\r
+*/\r
+\r
+/*\r
+ Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com)\r
+ Based on code by Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, and distribute this software\r
+ and its documentation for any purpose and without fee is hereby\r
+ granted, provided that the above copyright notice appear in all\r
+ copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting\r
+ documentation, and that the name of the author not be used in\r
+ advertising or publicity pertaining to distribution of the\r
+ software without specific, written prior permission.\r
+\r
+ The author disclaim all warranties with regard to this\r
+ software, including all implied warranties of merchantability\r
+ and fitness. In no event shall the author be liable for any\r
+ special, indirect or consequential damages or any damages\r
+ whatsoever resulting from loss of use, data or profits, whether\r
+ in an action of contract, negligence or other tortious action,\r
+ arising out of or in connection with the use or performance of\r
+ this software.\r
+*/\r
+\r
+/** \file\r
+ *\r
+ * Main source file for the Keyboard demo. This file contains the main tasks of the demo and\r
+ * is responsible for the initial application hardware configuration.\r
+ */\r
+ \r
+#include "Keyboard.h"\r
+\r
+/* Project Tags, for reading out using the ButtLoad project */\r
+BUTTLOADTAG(ProjName, "LUFA Keyboard App");\r
+BUTTLOADTAG(BuildTime, __TIME__);\r
+BUTTLOADTAG(BuildDate, __DATE__);\r
+BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);\r
+\r
+/* Scheduler Task List */\r
+TASK_LIST\r
+{\r
+ { Task: USB_USBTask , TaskStatus: TASK_STOP },\r
+ { Task: USB_Keyboard_Report , TaskStatus: TASK_STOP },\r
+};\r
+\r
+/* Global Variables */\r
+/** Indicates what report mode the host has requested, true for normal HID reporting mode, false for special boot\r
+ * protocol reporting mode.\r
+ */\r
+bool UsingReportProtocol = true;\r
+\r
+/** Current Idle period. This is set by the host via a Set Idle HID class request to silence the device's reports\r
+ * for either the entire idle duration, or until the report status changes (e.g. the user moves the mouse).\r
+ */\r
+uint8_t IdleCount = 0;\r
+\r
+/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle\r
+ * milliseconds. This is seperate to the IdleCount timer and is incremented and compared as the host may request \r
+ * the current idle period via a Get Idle HID class request, thus its value must be preserved.\r
+ */\r
+uint16_t IdleMSRemaining = 0;\r
+\r
+\r
+/** Main program entry point. This routine configures the hardware required by the application, then\r
+ * starts the scheduler to run the application tasks.\r
+ */\r
+int main(void)\r
+{\r
+ /* Disable watchdog if enabled by bootloader/fuses */\r
+ MCUSR &= ~(1 << WDRF);\r
+ wdt_disable();\r
+\r
+ /* Disable Clock Division */\r
+ SetSystemClockPrescaler(0);\r
+\r
+ /* Hardware Initialization */\r
+ Joystick_Init();\r
+ LEDs_Init();\r
+ \r
+ /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */\r
+ OCR0A = 0x7D;\r
+ TCCR0A = (1 << WGM01);\r
+ TCCR0B = ((1 << CS01) | (1 << CS00));\r
+ TIMSK0 = (1 << OCIE0A);\r
+\r
+ /* Indicate USB not ready */\r
+ UpdateStatus(Status_USBNotReady);\r
+ \r
+ /* Initialize Scheduler so that it can be used */\r
+ Scheduler_Init();\r
+\r
+ /* Initialize USB Subsystem */\r
+ USB_Init();\r
+ \r
+ /* Scheduling - routine never returns, so put this last in the main function */\r
+ Scheduler_Start();\r
+}\r
+\r
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and\r
+ * starts the library USB task to begin the enumeration and USB management process.\r
+ */\r
+EVENT_HANDLER(USB_Connect)\r
+{\r
+ /* Start USB management task */\r
+ Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);\r
+\r
+ /* Indicate USB enumerating */\r
+ UpdateStatus(Status_USBEnumerating);\r
+}\r
+\r
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
+ * the status LEDs and stops the USB management and Keyboard reporting tasks.\r
+ */\r
+EVENT_HANDLER(USB_Disconnect)\r
+{\r
+ /* Stop running keyboard reporting and USB management tasks */\r
+ Scheduler_SetTaskMode(USB_Keyboard_Report, TASK_STOP);\r
+ Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);\r
+\r
+ /* Indicate USB not ready */\r
+ UpdateStatus(Status_USBNotReady);\r
+}\r
+\r
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
+ * of the USB device after enumeration - the device endpoints are configured and the keyboard reporting task started.\r
+ */ \r
+EVENT_HANDLER(USB_ConfigurationChanged)\r
+{\r
+ /* Setup Keyboard Keycode Report Endpoint */\r
+ Endpoint_ConfigureEndpoint(KEYBOARD_EPNUM, EP_TYPE_INTERRUPT,\r
+ ENDPOINT_DIR_IN, KEYBOARD_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE);\r
+\r
+ /* Setup Keyboard LED Report Endpoint */\r
+ Endpoint_ConfigureEndpoint(KEYBOARD_LEDS_EPNUM, EP_TYPE_INTERRUPT,\r
+ ENDPOINT_DIR_OUT, KEYBOARD_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE);\r
+\r
+ /* Indicate USB connected and ready */\r
+ UpdateStatus(Status_USBReady);\r
+ \r
+ /* Default to report protocol on connect */\r
+ UsingReportProtocol = true;\r
+\r
+ /* Start Keyboard reporting task */\r
+ Scheduler_SetTaskMode(USB_Keyboard_Report, TASK_RUN);\r
+}\r
+\r
+/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific\r
+ * control requests that are not handled internally by the USB library (including the HID commands, which are\r
+ * all issued via the control endpoint), so that they can be handled appropriately for the application.\r
+ */\r
+EVENT_HANDLER(USB_UnhandledControlPacket)\r
+{\r
+ /* Handle HID Class specific requests */\r
+ switch (bRequest)\r
+ {\r
+ case REQ_GetReport:\r
+ if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ USB_KeyboardReport_Data_t KeyboardReportData;\r
+\r
+ /* Create the next keyboard report for transmission to the host */\r
+ GetNextReport(&KeyboardReportData);\r
+\r
+ /* Ignore report type and ID number value */\r
+ Endpoint_Discard_Word();\r
+ \r
+ /* Ignore unused Interface number value */\r
+ Endpoint_Discard_Word();\r
+\r
+ /* Read in the number of bytes in the report to send to the host */\r
+ uint16_t wLength = Endpoint_Read_Word_LE();\r
+ \r
+ /* If trying to send more bytes than exist to the host, clamp the value at the report size */\r
+ if (wLength > sizeof(KeyboardReportData))\r
+ wLength = sizeof(KeyboardReportData);\r
+\r
+ Endpoint_ClearSetupReceived();\r
+ \r
+ /* Write the report data to the control endpoint */\r
+ Endpoint_Write_Control_Stream_LE(&KeyboardReportData, wLength);\r
+ \r
+ /* Finalize the stream transfer to send the last packet or clear the host abort */\r
+ Endpoint_ClearSetupOUT();\r
+ }\r
+ \r
+ break;\r
+ case REQ_SetReport:\r
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ Endpoint_ClearSetupReceived();\r
+ \r
+ /* Wait until the LED report has been sent by the host */\r
+ while (!(Endpoint_IsSetupOUTReceived()));\r
+\r
+ /* Read in the LED report from the host */\r
+ uint8_t LEDStatus = Endpoint_Read_Byte();\r
+\r
+ /* Process the incomming LED report */\r
+ ProcessLEDReport(LEDStatus);\r
+ \r
+ /* Clear the endpoint data */\r
+ Endpoint_ClearSetupOUT();\r
+\r
+ /* Wait until the host is ready to receive the request confirmation */\r
+ while (!(Endpoint_IsSetupINReady()));\r
+ \r
+ /* Handshake the request by sending an empty IN packet */\r
+ Endpoint_ClearSetupIN();\r
+ }\r
+ \r
+ break;\r
+ case REQ_GetProtocol:\r
+ if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ Endpoint_ClearSetupReceived();\r
+ \r
+ /* Write the current protocol flag to the host */\r
+ Endpoint_Write_Byte(UsingReportProtocol);\r
+ \r
+ /* Send the flag to the host */\r
+ Endpoint_ClearSetupIN();\r
+ }\r
+ \r
+ break;\r
+ case REQ_SetProtocol:\r
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ /* Read in the wValue parameter containing the new protocol mode */\r
+ uint16_t wValue = Endpoint_Read_Word_LE();\r
+ \r
+ Endpoint_ClearSetupReceived();\r
+\r
+ /* Set or clear the flag depending on what the host indicates that the current Protocol should be */\r
+ UsingReportProtocol = (wValue != 0x0000);\r
+ \r
+ /* Send an empty packet to acknowedge the command */\r
+ Endpoint_ClearSetupIN();\r
+ }\r
+ \r
+ break;\r
+ case REQ_SetIdle:\r
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ /* Read in the wValue parameter containing the idle period */\r
+ uint16_t wValue = Endpoint_Read_Word_LE();\r
+ \r
+ Endpoint_ClearSetupReceived();\r
+ \r
+ /* Get idle period in MSB */\r
+ IdleCount = (wValue >> 8);\r
+ \r
+ /* Send an empty packet to acknowedge the command */\r
+ Endpoint_ClearSetupIN();\r
+ }\r
+ \r
+ break;\r
+ case REQ_GetIdle:\r
+ if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ { \r
+ Endpoint_ClearSetupReceived();\r
+ \r
+ /* Write the current idle duration to the host */\r
+ Endpoint_Write_Byte(IdleCount);\r
+ \r
+ /* Send the flag to the host */\r
+ Endpoint_ClearSetupIN();\r
+ }\r
+\r
+ break;\r
+ }\r
+}\r
+\r
+/** ISR for the timer 0 compare vector. This ISR fires once each millisecond, and increments the\r
+ * scheduler elapsed idle period counter when the host has set an idle period.\r
+ */\r
+ISR(TIMER0_COMPA_vect, ISR_BLOCK)\r
+{\r
+ /* One millisecond has elapsed, decrement the idle time remaining counter if it has not already elapsed */\r
+ if (IdleMSRemaining)\r
+ IdleMSRemaining--;\r
+}\r
+\r
+/** Fills the given HID report data structure with the next HID report to send to the host.\r
+ *\r
+ * \param ReportData Pointer to a HID report data structure to be filled\r
+ *\r
+ * \return Boolean true if the new report differs from the last report, false otherwise\r
+ */\r
+bool GetNextReport(USB_KeyboardReport_Data_t* ReportData)\r
+{\r
+ static uint8_t PrevJoyStatus = 0;\r
+ uint8_t JoyStatus_LCL = Joystick_GetStatus();\r
+ bool InputChanged = false;\r
+\r
+ /* Clear the report contents */\r
+ memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t));\r
+\r
+ if (JoyStatus_LCL & JOY_UP)\r
+ ReportData->KeyCode[0] = 0x04; // A\r
+ else if (JoyStatus_LCL & JOY_DOWN)\r
+ ReportData->KeyCode[0] = 0x05; // B\r
+\r
+ if (JoyStatus_LCL & JOY_LEFT)\r
+ ReportData->KeyCode[0] = 0x06; // C\r
+ else if (JoyStatus_LCL & JOY_RIGHT)\r
+ ReportData->KeyCode[0] = 0x07; // D\r
+\r
+ if (JoyStatus_LCL & JOY_PRESS)\r
+ ReportData->KeyCode[0] = 0x08; // E\r
+ \r
+ /* Check if the new report is different to the previous report */\r
+ InputChanged = (uint8_t)(PrevJoyStatus ^ JoyStatus_LCL);\r
+\r
+ /* Save the current joystick status for later comparison */\r
+ PrevJoyStatus = JoyStatus_LCL;\r
+\r
+ /* Return whether the new report is different to the previous report or not */\r
+ return InputChanged;\r
+}\r
+\r
+/** Processes a given LED report mask from the host and sets the board LEDs to match.\r
+ *\r
+ * \param LEDReport LED mask from the host, containing a mask of what LEDs are set\r
+ */\r
+void ProcessLEDReport(uint8_t LEDReport)\r
+{\r
+ uint8_t LEDMask = LEDS_LED2;\r
+ \r
+ if (LEDReport & 0x01) // NUM Lock\r
+ LEDMask |= LEDS_LED1;\r
+ \r
+ if (LEDReport & 0x02) // CAPS Lock\r
+ LEDMask |= LEDS_LED3;\r
+\r
+ if (LEDReport & 0x04) // SCROLL Lock\r
+ LEDMask |= LEDS_LED4;\r
+\r
+ /* Set the status LEDs to the current Keyboard LED status */\r
+ LEDs_SetAllLEDs(LEDMask);\r
+}\r
+\r
+/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to\r
+ * log to a serial port, or anything else that is suitable for status updates.\r
+ *\r
+ * \param CurrentStatus Current status of the system, from the Keyboard_StatusCodes_t enum\r
+ */\r
+void UpdateStatus(uint8_t CurrentStatus)\r
+{\r
+ uint8_t LEDMask = LEDS_NO_LEDS;\r
+ \r
+ /* Set the LED mask to the appropriate LED mask based on the given status code */\r
+ switch (CurrentStatus)\r
+ {\r
+ case Status_USBNotReady:\r
+ LEDMask = (LEDS_LED1);\r
+ break;\r
+ case Status_USBEnumerating:\r
+ LEDMask = (LEDS_LED1 | LEDS_LED2);\r
+ break;\r
+ case Status_USBReady:\r
+ LEDMask = (LEDS_LED2 | LEDS_LED4);\r
+ break;\r
+ }\r
+ \r
+ /* Set the board LEDs to the new LED mask */\r
+ LEDs_SetAllLEDs(LEDMask);\r
+}\r
+\r
+/** Function to manage HID report generation and transmission to the host, when in report mode. */\r
+TASK(USB_Keyboard_Report)\r
+{\r
+ USB_KeyboardReport_Data_t KeyboardReportData;\r
+ bool SendReport;\r
+ \r
+ /* Create the next keyboard report for transmission to the host */\r
+ SendReport = GetNextReport(&KeyboardReportData);\r
+ \r
+ /* Check if the idle period is set and has elapsed */\r
+ if (IdleCount && !(IdleMSRemaining))\r
+ {\r
+ /* Idle period elapsed, indicate that a report must be sent */\r
+ SendReport = true;\r
+ \r
+ /* Reset the idle time remaining counter, must multiply by 4 to get the duration in milliseconds */\r
+ IdleMSRemaining = (IdleCount << 2);\r
+ }\r
+ \r
+ /* Check if the USB system is connected to a host */\r
+ if (USB_IsConnected)\r
+ {\r
+ /* Select the Keyboard Report Endpoint */\r
+ Endpoint_SelectEndpoint(KEYBOARD_EPNUM);\r
+\r
+ /* Check if Keyboard Endpoint Ready for Read/Write, and if we should send a report */\r
+ if (Endpoint_ReadWriteAllowed() && SendReport)\r
+ {\r
+ /* Write Keyboard Report Data */\r
+ Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData));\r
+\r
+ /* Finalize the stream transfer to send the last packet */\r
+ Endpoint_ClearCurrentBank();\r
+ }\r
+\r
+ /* Select the Keyboard LED Report Endpoint */\r
+ Endpoint_SelectEndpoint(KEYBOARD_LEDS_EPNUM);\r
+\r
+ /* Check if Keyboard LED Endpoint Ready for Read/Write */\r
+ if (Endpoint_ReadWriteAllowed())\r
+ {\r
+ /* Read in the LED report from the host */\r
+ uint8_t LEDStatus = Endpoint_Read_Byte();\r
+\r
+ /* Process the incomming LED report */\r
+ ProcessLEDReport(LEDStatus);\r
+\r
+ /* Handshake the OUT Endpoint - clear endpoint and ready for next report */\r
+ Endpoint_ClearCurrentBank();\r
+ }\r
+ }\r
+}\r
projects / pub / lufa.git / blobdiff