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218 lines
6.9 KiB
218 lines
6.9 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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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 2017 Dean Camera (dean [at] fourwalledcubicle [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 Joystick 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 "Joystick.h"
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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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#if (ARCH == ARCH_AVR8)
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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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#elif (ARCH == ARCH_XMEGA)
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/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
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XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
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XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
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/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
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XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
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XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
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PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
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#endif
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/* Hardware Initialization */
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Joystick_Init();
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LEDs_Init();
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Buttons_Init();
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USB_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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}
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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 joystick reporting tasks.
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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 set the current configuration
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* of the USB device after enumeration - the device endpoints are configured and the joystick reporting task started.
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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 Endpoint */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(JOYSTICK_EPADDR, EP_TYPE_INTERRUPT, JOYSTICK_EPSIZE, 1);
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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_JoystickReport_Data_t JoystickReportData;
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/* Create the next HID report to send to the host */
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GetNextReport(&JoystickReportData);
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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(&JoystickReportData, sizeof(JoystickReportData));
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Endpoint_ClearOUT();
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}
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break;
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}
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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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* \return Boolean \c true if the new report differs from the last report, \c false otherwise
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*/
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bool GetNextReport(USB_JoystickReport_Data_t* const ReportData)
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{
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static uint8_t PrevJoyStatus = 0;
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static uint8_t PrevButtonStatus = 0;
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uint8_t JoyStatus_LCL = Joystick_GetStatus();
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uint8_t ButtonStatus_LCL = Buttons_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_JoystickReport_Data_t));
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if (JoyStatus_LCL & JOY_UP)
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ReportData->Y = -100;
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else if (JoyStatus_LCL & JOY_DOWN)
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ReportData->Y = 100;
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if (JoyStatus_LCL & JOY_LEFT)
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ReportData->X = -100;
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else if (JoyStatus_LCL & JOY_RIGHT)
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ReportData->X = 100;
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if (JoyStatus_LCL & JOY_PRESS)
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ReportData->Button |= (1 << 1);
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if (ButtonStatus_LCL & BUTTONS_BUTTON1)
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ReportData->Button |= (1 << 0);
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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) | (uint8_t)(PrevButtonStatus ^ ButtonStatus_LCL);
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/* Save the current joystick status for later comparison */
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PrevJoyStatus = JoyStatus_LCL;
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PrevButtonStatus = ButtonStatus_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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/** Function to manage HID report generation and transmission to the host. */
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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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/* Select the Joystick Report Endpoint */
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Endpoint_SelectEndpoint(JOYSTICK_EPADDR);
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/* Check to see if the host is ready for another packet */
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if (Endpoint_IsINReady())
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{
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USB_JoystickReport_Data_t JoystickReportData;
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/* Create the next HID report to send to the host */
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GetNextReport(&JoystickReportData);
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/* Write Joystick Report Data */
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Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData), NULL);
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearIN();
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/* Clear the report data afterwards */
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memset(&JoystickReportData, 0, sizeof(JoystickReportData));
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}
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}
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