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Diffstat (limited to 'lib/lufa/Demos/Device/LowLevel/Keyboard/Keyboard.c')
| -rw-r--r-- | lib/lufa/Demos/Device/LowLevel/Keyboard/Keyboard.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/lib/lufa/Demos/Device/LowLevel/Keyboard/Keyboard.c b/lib/lufa/Demos/Device/LowLevel/Keyboard/Keyboard.c new file mode 100644 index 0000000000..c412991e8b --- /dev/null +++ b/lib/lufa/Demos/Device/LowLevel/Keyboard/Keyboard.c @@ -0,0 +1,383 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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 disclaims 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, \c 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); + GlobalInterruptEnable(); + + for (;;) + { + HID_Task(); + USB_USBTask(); + } +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ +#if (ARCH == ARCH_AVR8) + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable clock division */ + clock_prescale_set(clock_div_1); +#elif (ARCH == ARCH_XMEGA) + /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */ + XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU); + XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL); + + /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */ + XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ); + XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB); + + PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm; +#endif + + /* 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_EPADDR, EP_TYPE_INTERRUPT, KEYBOARD_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(KEYBOARD_OUT_EPADDR, EP_TYPE_INTERRUPT, KEYBOARD_EPSIZE, 1); + + /* 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_MODIFIER_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 = false; + + /* Create the next keyboard report for transmission to the host */ + CreateKeyboardReport(&KeyboardReportData); + + /* 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; + } + else + { + /* 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); + } + + /* Select the Keyboard Report Endpoint */ + Endpoint_SelectEndpoint(KEYBOARD_IN_EPADDR); + + /* 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_EPADDR); + + /* 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(); +} + |