X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/33a018474913701fa9ef8e962acf58accd1184d2..77a9df36a77d2523dd2bc24fa17f9f04c6c175c5:/Demos/Device/LowLevel/Keyboard/Keyboard.c?ds=sidebyside diff --git a/Demos/Device/LowLevel/Keyboard/Keyboard.c b/Demos/Device/LowLevel/Keyboard/Keyboard.c index 06806b58b..2d5e366ba 100644 --- a/Demos/Device/LowLevel/Keyboard/Keyboard.c +++ b/Demos/Device/LowLevel/Keyboard/Keyboard.c @@ -1,383 +1,371 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com) - Based on code by Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Main source file for the Keyboard demo. This file contains the main tasks of the demo and - * is responsible for the initial application hardware configuration. - */ - -#include "Keyboard.h" - -/* Global Variables */ -/** Indicates what report mode the host has requested, true for normal HID reporting mode, false for special boot - * protocol reporting mode. - */ -bool UsingReportProtocol = true; - -/** Current Idle period. This is set by the host via a Set Idle HID class request to silence the device's reports - * for either the entire idle duration, or until the report status changes (e.g. the user presses a key). - */ -uint16_t IdleCount = 500; - -/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle - * milliseconds. This is separate to the IdleCount timer and is incremented and compared as the host may request - * the current idle period via a Get Idle HID class request, thus its value must be preserved. - */ -uint16_t IdleMSRemaining = 0; - - -/** Main program entry point. This routine configures the hardware required by the application, then - * starts the scheduler to run the USB management task. - */ -int main(void) -{ - SetupHardware(); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - - for (;;) - { - HID_Task(); - USB_USBTask(); - } -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); - - /* Hardware Initialization */ - Joystick_Init(); - LEDs_Init(); - USB_Init(); - - /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */ - OCR0A = 0x7D; - TCCR0A = (1 << WGM01); - TCCR0B = ((1 << CS01) | (1 << CS00)); - TIMSK0 = (1 << OCIE0A); -} - -/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and - * starts the library USB task to begin the enumeration and USB management process. - */ -void EVENT_USB_Connect(void) -{ - /* Indicate USB enumerating */ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); - - /* Default to report protocol on connect */ - UsingReportProtocol = true; -} - -/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via - * the status LEDs. - */ -void EVENT_USB_Disconnect(void) -{ - /* Indicate USB not ready */ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); -} - -/** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration - * of the USB device after enumeration, and configures the keyboard device endpoints. - */ -void EVENT_USB_ConfigurationChanged(void) -{ - /* Setup Keyboard Keycode Report Endpoint */ - Endpoint_ConfigureEndpoint(KEYBOARD_EPNUM, EP_TYPE_INTERRUPT, - ENDPOINT_DIR_IN, KEYBOARD_EPSIZE, - ENDPOINT_BANK_SINGLE); - - /* Setup Keyboard LED Report Endpoint */ - Endpoint_ConfigureEndpoint(KEYBOARD_LEDS_EPNUM, EP_TYPE_INTERRUPT, - ENDPOINT_DIR_OUT, KEYBOARD_EPSIZE, - ENDPOINT_BANK_SINGLE); - - /* Indicate USB connected and ready */ - LEDs_SetAllLEDs(LEDMASK_USB_READY); -} - -/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific - * control requests that are not handled internally by the USB library (including the HID commands, which are - * all issued via the control endpoint), so that they can be handled appropriately for the application. - */ -void EVENT_USB_UnhandledControlPacket(void) -{ - /* Handle HID Class specific requests */ - switch (USB_ControlRequest.bRequest) - { - case REQ_GetReport: - if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) - { - USB_KeyboardReport_Data_t KeyboardReportData; - - Endpoint_ClearSETUP(); - - /* Create the next keyboard report for transmission to the host */ - CreateKeyboardReport(&KeyboardReportData); - - /* Write the report data to the control endpoint */ - Endpoint_Write_Control_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData)); - - /* Finalize the stream transfer to send the last packet or clear the host abort */ - Endpoint_ClearOUT(); - } - - break; - case REQ_SetReport: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Wait until the LED report has been sent by the host */ - while (!(Endpoint_IsOUTReceived())); - - /* Read in the LED report from the host */ - uint8_t LEDStatus = Endpoint_Read_Byte(); - - /* Process the incoming LED report */ - ProcessLEDReport(LEDStatus); - - /* Clear the endpoint data */ - Endpoint_ClearOUT(); - - /* Acknowledge status stage */ - while (!(Endpoint_IsINReady())); - Endpoint_ClearIN(); - } - - break; - case REQ_GetProtocol: - if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Write the current protocol flag to the host */ - Endpoint_Write_Byte(UsingReportProtocol); - - /* Send the flag to the host */ - Endpoint_ClearIN(); - - /* Acknowledge status stage */ - while (!(Endpoint_IsOUTReceived())); - Endpoint_ClearOUT(); - } - - break; - case REQ_SetProtocol: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Set or clear the flag depending on what the host indicates that the current Protocol should be */ - UsingReportProtocol = (USB_ControlRequest.wValue != 0); - - /* Acknowledge status stage */ - while (!(Endpoint_IsINReady())); - Endpoint_ClearIN(); - } - - break; - case REQ_SetIdle: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Get idle period in MSB */ - IdleCount = (USB_ControlRequest.wValue >> 8); - - /* Acknowledge status stage */ - while (!(Endpoint_IsINReady())); - Endpoint_ClearIN(); - } - - break; - case REQ_GetIdle: - if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Write the current idle duration to the host */ - Endpoint_Write_Byte(IdleCount); - - /* Send the flag to the host */ - Endpoint_ClearIN(); - - /* Acknowledge status stage */ - while (!(Endpoint_IsOUTReceived())); - Endpoint_ClearOUT(); - } - - break; - } -} - -/** ISR for the timer 0 compare vector. This ISR fires once each millisecond, and increments the - * scheduler elapsed idle period counter when the host has set an idle period. - */ -ISR(TIMER0_COMPA_vect, ISR_BLOCK) -{ - /* One millisecond has elapsed, decrement the idle time remaining counter if it has not already elapsed */ - if (IdleMSRemaining) - IdleMSRemaining--; -} - -/** Fills the given HID report data structure with the next HID report to send to the host. - * - * \param ReportData Pointer to a HID report data structure to be filled - */ -void CreateKeyboardReport(USB_KeyboardReport_Data_t* ReportData) -{ - uint8_t JoyStatus_LCL = Joystick_GetStatus(); - - /* Clear the report contents */ - memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t)); - - if (JoyStatus_LCL & JOY_UP) - ReportData->KeyCode[0] = 0x04; // A - else if (JoyStatus_LCL & JOY_DOWN) - ReportData->KeyCode[0] = 0x05; // B - - if (JoyStatus_LCL & JOY_LEFT) - ReportData->KeyCode[0] = 0x06; // C - else if (JoyStatus_LCL & JOY_RIGHT) - ReportData->KeyCode[0] = 0x07; // D - - if (JoyStatus_LCL & JOY_PRESS) - ReportData->KeyCode[0] = 0x08; // E -} - -/** Processes a received LED report, and updates the board LEDs states to match. - * - * \param LEDReport LED status report from the host - */ -void ProcessLEDReport(uint8_t LEDReport) -{ - uint8_t LEDMask = LEDS_LED2; - - if (LEDReport & 0x01) // NUM Lock - LEDMask |= LEDS_LED1; - - if (LEDReport & 0x02) // CAPS Lock - LEDMask |= LEDS_LED3; - - if (LEDReport & 0x04) // SCROLL Lock - LEDMask |= LEDS_LED4; - - /* Set the status LEDs to the current Keyboard LED status */ - LEDs_SetAllLEDs(LEDMask); -} - -/** Sends the next HID report to the host, via the keyboard data endpoint. */ -void SendNextReport(void) -{ - static USB_KeyboardReport_Data_t PrevKeyboardReportData; - USB_KeyboardReport_Data_t KeyboardReportData; - bool SendReport = true; - - /* Create the next keyboard report for transmission to the host */ - CreateKeyboardReport(&KeyboardReportData); - - /* Check to see if the report data has changed - if so a report MUST be sent */ - SendReport = (memcmp(&PrevKeyboardReportData, &KeyboardReportData, sizeof(USB_KeyboardReport_Data_t)) != 0); - - /* Save the current report data for later comparison to check for changes */ - PrevKeyboardReportData = KeyboardReportData; - - /* Check if the idle period is set and has elapsed */ - if ((IdleCount != HID_IDLE_CHANGESONLY) && (!(IdleMSRemaining))) - { - /* Reset the idle time remaining counter, must multiply by 4 to get the duration in milliseconds */ - IdleMSRemaining = (IdleCount << 2); - - /* Idle period is set and has elapsed, must send a report to the host */ - SendReport = true; - } - - /* Select the Keyboard Report Endpoint */ - Endpoint_SelectEndpoint(KEYBOARD_EPNUM); - - /* Check if Keyboard Endpoint Ready for Read/Write and if we should send a new report */ - if (Endpoint_IsReadWriteAllowed() && SendReport) - { - /* Write Keyboard Report Data */ - Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData)); - - /* Finalize the stream transfer to send the last packet */ - Endpoint_ClearIN(); - } -} - -/** Reads the next LED status report from the host from the LED data endpoint, if one has been sent. */ -void ReceiveNextReport(void) -{ - /* Select the Keyboard LED Report Endpoint */ - Endpoint_SelectEndpoint(KEYBOARD_LEDS_EPNUM); - - /* Check if Keyboard LED Endpoint contains a packet */ - if (Endpoint_IsOUTReceived()) - { - /* Check to see if the packet contains data */ - if (Endpoint_IsReadWriteAllowed()) - { - /* Read in the LED report from the host */ - uint8_t LEDReport = Endpoint_Read_Byte(); - - /* Process the read LED report from the host */ - ProcessLEDReport(LEDReport); - } - - /* Handshake the OUT Endpoint - clear endpoint and ready for next report */ - Endpoint_ClearOUT(); - } -} - -/** Function to manage HID report generation and transmission to the host, when in report mode. */ -void HID_Task(void) -{ - /* Check if the USB system is connected to a host */ - if (USB_IsConnected) - { - /* Send the next keypress report to the host */ - SendNextReport(); - - /* Process the LED report sent from the host */ - ReceiveNextReport(); - } -} +/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * Main source file for the Keyboard demo. This file contains the main tasks of the demo and + * is responsible for the initial application hardware configuration. + */ + +#include "Keyboard.h" + +/** Indicates what report mode the host has requested, true for normal HID reporting mode, false for special boot + * protocol reporting mode. + */ +static bool UsingReportProtocol = true; + +/** Current Idle period. This is set by the host via a Set Idle HID class request to silence the device's reports + * for either the entire idle duration, or until the report status changes (e.g. the user presses a key). + */ +static uint16_t IdleCount = 500; + +/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle + * milliseconds. This is separate to the IdleCount timer and is incremented and compared as the host may request + * the current idle period via a Get Idle HID class request, thus its value must be preserved. + */ +static uint16_t IdleMSRemaining = 0; + + +/** Main program entry point. This routine configures the hardware required by the application, then + * enters a loop to run the application tasks in sequence. + */ +int main(void) +{ + SetupHardware(); + + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + sei(); + + for (;;) + { + HID_Task(); + USB_USBTask(); + } +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable clock division */ + clock_prescale_set(clock_div_1); + + /* Hardware Initialization */ + Joystick_Init(); + LEDs_Init(); + USB_Init(); + Buttons_Init(); +} + +/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and + * starts the library USB task to begin the enumeration and USB management process. + */ +void EVENT_USB_Device_Connect(void) +{ + /* Indicate USB enumerating */ + LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); + + /* Default to report protocol on connect */ + UsingReportProtocol = true; +} + +/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via + * the status LEDs. + */ +void EVENT_USB_Device_Disconnect(void) +{ + /* Indicate USB not ready */ + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); +} + +/** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration + * of the USB device after enumeration, and configures the keyboard device endpoints. + */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + bool ConfigSuccess = true; + + /* Setup HID Report Endpoints */ + ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_IN_EPNUM, EP_TYPE_INTERRUPT, ENDPOINT_DIR_IN, + KEYBOARD_EPSIZE, ENDPOINT_BANK_SINGLE); + ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_OUT_EPNUM, EP_TYPE_INTERRUPT, ENDPOINT_DIR_OUT, + KEYBOARD_EPSIZE, ENDPOINT_BANK_SINGLE); + + /* Turn on Start-of-Frame events for tracking HID report period expiry */ + USB_Device_EnableSOFEvents(); + + /* Indicate endpoint configuration success or failure */ + LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); +} + +/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to + * the device from the USB host before passing along unhandled control requests to the library for processing + * internally. + */ +void EVENT_USB_Device_ControlRequest(void) +{ + /* Handle HID Class specific requests */ + switch (USB_ControlRequest.bRequest) + { + case HID_REQ_GetReport: + if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) + { + USB_KeyboardReport_Data_t KeyboardReportData; + + /* Create the next keyboard report for transmission to the host */ + CreateKeyboardReport(&KeyboardReportData); + + Endpoint_ClearSETUP(); + + /* Write the report data to the control endpoint */ + Endpoint_Write_Control_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData)); + Endpoint_ClearOUT(); + } + + break; + case HID_REQ_SetReport: + if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + + /* Wait until the LED report has been sent by the host */ + while (!(Endpoint_IsOUTReceived())) + { + if (USB_DeviceState == DEVICE_STATE_Unattached) + return; + } + + /* Read in the LED report from the host */ + uint8_t LEDStatus = Endpoint_Read_8(); + + Endpoint_ClearOUT(); + Endpoint_ClearStatusStage(); + + /* Process the incoming LED report */ + ProcessLEDReport(LEDStatus); + } + + break; + case HID_REQ_GetProtocol: + if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + + /* Write the current protocol flag to the host */ + Endpoint_Write_8(UsingReportProtocol); + + Endpoint_ClearIN(); + Endpoint_ClearStatusStage(); + } + + break; + case HID_REQ_SetProtocol: + if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + Endpoint_ClearStatusStage(); + + /* Set or clear the flag depending on what the host indicates that the current Protocol should be */ + UsingReportProtocol = (USB_ControlRequest.wValue != 0); + } + + break; + case HID_REQ_SetIdle: + if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + Endpoint_ClearStatusStage(); + + /* Get idle period in MSB, IdleCount must be multiplied by 4 to get number of milliseconds */ + IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6); + } + + break; + case HID_REQ_GetIdle: + if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + + /* Write the current idle duration to the host, must be divided by 4 before sent to host */ + Endpoint_Write_8(IdleCount >> 2); + + Endpoint_ClearIN(); + Endpoint_ClearStatusStage(); + } + + break; + } +} + +/** Event handler for the USB device Start Of Frame event. */ +void EVENT_USB_Device_StartOfFrame(void) +{ + /* One millisecond has elapsed, decrement the idle time remaining counter if it has not already elapsed */ + if (IdleMSRemaining) + IdleMSRemaining--; +} + +/** Fills the given HID report data structure with the next HID report to send to the host. + * + * \param[out] ReportData Pointer to a HID report data structure to be filled + */ +void CreateKeyboardReport(USB_KeyboardReport_Data_t* const ReportData) +{ + uint8_t JoyStatus_LCL = Joystick_GetStatus(); + uint8_t ButtonStatus_LCL = Buttons_GetStatus(); + + uint8_t UsedKeyCodes = 0; + + /* Clear the report contents */ + memset(ReportData, 0, sizeof(USB_KeyboardReport_Data_t)); + + /* Make sent key uppercase by indicating that the left shift key is pressed */ + ReportData->Modifier = HID_KEYBOARD_MODIFER_LEFTSHIFT; + + if (JoyStatus_LCL & JOY_UP) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_A; + else if (JoyStatus_LCL & JOY_DOWN) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_B; + + if (JoyStatus_LCL & JOY_LEFT) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_C; + else if (JoyStatus_LCL & JOY_RIGHT) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_D; + + if (JoyStatus_LCL & JOY_PRESS) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_E; + + if (ButtonStatus_LCL & BUTTONS_BUTTON1) + ReportData->KeyCode[UsedKeyCodes++] = HID_KEYBOARD_SC_F; +} + +/** Processes a received LED report, and updates the board LEDs states to match. + * + * \param[in] LEDReport LED status report from the host + */ +void ProcessLEDReport(const uint8_t LEDReport) +{ + uint8_t LEDMask = LEDS_LED2; + + if (LEDReport & HID_KEYBOARD_LED_NUMLOCK) + LEDMask |= LEDS_LED1; + + if (LEDReport & HID_KEYBOARD_LED_CAPSLOCK) + LEDMask |= LEDS_LED3; + + if (LEDReport & HID_KEYBOARD_LED_SCROLLLOCK) + LEDMask |= LEDS_LED4; + + /* Set the status LEDs to the current Keyboard LED status */ + LEDs_SetAllLEDs(LEDMask); +} + +/** Sends the next HID report to the host, via the keyboard data endpoint. */ +void SendNextReport(void) +{ + static USB_KeyboardReport_Data_t PrevKeyboardReportData; + USB_KeyboardReport_Data_t KeyboardReportData; + bool SendReport = true; + + /* Create the next keyboard report for transmission to the host */ + CreateKeyboardReport(&KeyboardReportData); + + /* Check to see if the report data has changed - if so a report MUST be sent */ + SendReport = (memcmp(&PrevKeyboardReportData, &KeyboardReportData, sizeof(USB_KeyboardReport_Data_t)) != 0); + + /* Check if the idle period is set and has elapsed */ + if (IdleCount && (!(IdleMSRemaining))) + { + /* Reset the idle time remaining counter */ + IdleMSRemaining = IdleCount; + + /* Idle period is set and has elapsed, must send a report to the host */ + SendReport = true; + } + + /* Select the Keyboard Report Endpoint */ + Endpoint_SelectEndpoint(KEYBOARD_IN_EPNUM); + + /* Check if Keyboard Endpoint Ready for Read/Write and if we should send a new report */ + if (Endpoint_IsReadWriteAllowed() && SendReport) + { + /* Save the current report data for later comparison to check for changes */ + PrevKeyboardReportData = KeyboardReportData; + + /* Write Keyboard Report Data */ + Endpoint_Write_Stream_LE(&KeyboardReportData, sizeof(KeyboardReportData), NULL); + + /* Finalize the stream transfer to send the last packet */ + Endpoint_ClearIN(); + } +} + +/** Reads the next LED status report from the host from the LED data endpoint, if one has been sent. */ +void ReceiveNextReport(void) +{ + /* Select the Keyboard LED Report Endpoint */ + Endpoint_SelectEndpoint(KEYBOARD_OUT_EPNUM); + + /* Check if Keyboard LED Endpoint contains a packet */ + if (Endpoint_IsOUTReceived()) + { + /* Check to see if the packet contains data */ + if (Endpoint_IsReadWriteAllowed()) + { + /* Read in the LED report from the host */ + uint8_t LEDReport = Endpoint_Read_8(); + + /* Process the read LED report from the host */ + ProcessLEDReport(LEDReport); + } + + /* Handshake the OUT Endpoint - clear endpoint and ready for next report */ + Endpoint_ClearOUT(); + } +} + +/** Function to manage HID report generation and transmission to the host, when in report mode. */ +void HID_Task(void) +{ + /* Device must be connected and configured for the task to run */ + if (USB_DeviceState != DEVICE_STATE_Configured) + return; + + /* Send the next keypress report to the host */ + SendNextReport(); + + /* Process the LED report sent from the host */ + ReceiveNextReport(); +} +