From 74298f8ca11dc8d3b0359d1d4e124d6494c3eeac Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Fri, 10 Apr 2009 01:15:42 +0200 Subject: * digital/avr/modules/usb: - imported LUFA. --- .../avr/modules/usb/lufa/Demos/Joystick/Joystick.c | 264 +++++++++++++++++++++ 1 file changed, 264 insertions(+) create mode 100644 digital/avr/modules/usb/lufa/Demos/Joystick/Joystick.c (limited to 'digital/avr/modules/usb/lufa/Demos/Joystick/Joystick.c') diff --git a/digital/avr/modules/usb/lufa/Demos/Joystick/Joystick.c b/digital/avr/modules/usb/lufa/Demos/Joystick/Joystick.c new file mode 100644 index 00000000..88d41584 --- /dev/null +++ b/digital/avr/modules/usb/lufa/Demos/Joystick/Joystick.c @@ -0,0 +1,264 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2009. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2009 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 Joystick demo. This file contains the main tasks of the demo and + * is responsible for the initial application hardware configuration. + */ + +#include "Joystick.h" + +/* Project Tags, for reading out using the ButtLoad project */ +BUTTLOADTAG(ProjName, "LUFA Joystick App"); +BUTTLOADTAG(BuildTime, __TIME__); +BUTTLOADTAG(BuildDate, __DATE__); +BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING); + +/* Scheduler Task List */ +TASK_LIST +{ + { Task: USB_USBTask , TaskStatus: TASK_STOP }, + { Task: USB_Joystick_Report , TaskStatus: TASK_STOP }, +}; + +/** Main program entry point. This routine configures the hardware required by the application, then + * starts the scheduler to run the application tasks. + */ +int main(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable Clock Division */ + SetSystemClockPrescaler(0); + + /* Hardware Initialization */ + Joystick_Init(); + LEDs_Init(); + HWB_Init(); + + /* Indicate USB not ready */ + UpdateStatus(Status_USBNotReady); + + /* Initialize Scheduler so that it can be used */ + Scheduler_Init(); + + /* Initialize USB Subsystem */ + USB_Init(); + + /* Scheduling - routine never returns, so put this last in the main function */ + Scheduler_Start(); +} + +/** 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. + */ +EVENT_HANDLER(USB_Connect) +{ + /* Start USB management task */ + Scheduler_SetTaskMode(USB_USBTask, TASK_RUN); + + /* Indicate USB enumerating */ + UpdateStatus(Status_USBEnumerating); +} + +/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via + * the status LEDs and stops the USB management and joystick reporting tasks. + */ +EVENT_HANDLER(USB_Disconnect) +{ + /* Stop running joystick reporting and USB management tasks */ + Scheduler_SetTaskMode(USB_Joystick_Report, TASK_STOP); + Scheduler_SetTaskMode(USB_USBTask, TASK_STOP); + + /* Indicate USB not ready */ + UpdateStatus(Status_USBNotReady); +} + +/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration + * of the USB device after enumeration - the device endpoints are configured and the joystick reporting task started. + */ +EVENT_HANDLER(USB_ConfigurationChanged) +{ + /* Setup Joystick Report Endpoint */ + Endpoint_ConfigureEndpoint(JOYSTICK_EPNUM, EP_TYPE_INTERRUPT, + ENDPOINT_DIR_IN, JOYSTICK_EPSIZE, + ENDPOINT_BANK_SINGLE); + + /* Indicate USB connected and ready */ + UpdateStatus(Status_USBReady); + + /* Start joystick reporting task */ + Scheduler_SetTaskMode(USB_Joystick_Report, TASK_RUN); +} + +/** 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. + */ +EVENT_HANDLER(USB_UnhandledControlPacket) +{ + /* Handle HID Class specific requests */ + switch (bRequest) + { + case REQ_GetReport: + if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) + { + USB_JoystickReport_Data_t JoystickReportData; + + /* Create the next HID report to send to the host */ + GetNextReport(&JoystickReportData); + + /* Ignore report type and ID number value */ + Endpoint_Discard_Word(); + + /* Ignore unused Interface number value */ + Endpoint_Discard_Word(); + + /* Read in the number of bytes in the report to send to the host */ + uint16_t wLength = Endpoint_Read_Word_LE(); + + /* If trying to send more bytes than exist to the host, clamp the value at the report size */ + if (wLength > sizeof(JoystickReportData)) + wLength = sizeof(JoystickReportData); + + Endpoint_ClearSetupReceived(); + + /* Write the report data to the control endpoint */ + Endpoint_Write_Control_Stream_LE(&JoystickReportData, wLength); + + /* Finalize the stream transfer to send the last packet or clear the host abort */ + Endpoint_ClearSetupOUT(); + } + + break; + } +} + +/** 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 + * + * \return Boolean true if the new report differs from the last report, false otherwise + */ +bool GetNextReport(USB_JoystickReport_Data_t* ReportData) +{ + static uint8_t PrevJoyStatus = 0; + uint8_t JoyStatus_LCL = Joystick_GetStatus(); + bool InputChanged = false; + + /* Clear the report contents */ + memset(ReportData, 0, sizeof(USB_JoystickReport_Data_t)); + + if (JoyStatus_LCL & JOY_UP) + ReportData->Y = -100; + else if (JoyStatus_LCL & JOY_DOWN) + ReportData->Y = 100; + + if (JoyStatus_LCL & JOY_RIGHT) + ReportData->X = 100; + else if (JoyStatus_LCL & JOY_LEFT) + ReportData->X = -100; + + if (JoyStatus_LCL & JOY_PRESS) + ReportData->Button = (1 << 1); + + if (HWB_GetStatus()) + ReportData->Button |= (1 << 0); + + /* Check if the new report is different to the previous report */ + InputChanged = (uint8_t)(PrevJoyStatus ^ JoyStatus_LCL); + + /* Save the current joystick status for later comparison */ + PrevJoyStatus = JoyStatus_LCL; + + /* Return whether the new report is different to the previous report or not */ + return InputChanged; +} + +/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to + * log to a serial port, or anything else that is suitable for status updates. + * + * \param CurrentStatus Current status of the system, from the Joystick_StatusCodes_t enum + */ +void UpdateStatus(uint8_t CurrentStatus) +{ + uint8_t LEDMask = LEDS_NO_LEDS; + + /* Set the LED mask to the appropriate LED mask based on the given status code */ + switch (CurrentStatus) + { + case Status_USBNotReady: + LEDMask = (LEDS_LED1); + break; + case Status_USBEnumerating: + LEDMask = (LEDS_LED1 | LEDS_LED2); + break; + case Status_USBReady: + LEDMask = (LEDS_LED2 | LEDS_LED4); + break; + } + + /* Set the board LEDs to the new LED mask */ + LEDs_SetAllLEDs(LEDMask); +} + +/** Function to manage HID report generation and transmission to the host. */ +TASK(USB_Joystick_Report) +{ + /* Check if the USB System is connected to a Host */ + if (USB_IsConnected) + { + /* Select the Joystick Report Endpoint */ + Endpoint_SelectEndpoint(JOYSTICK_EPNUM); + + /* Check if Joystick Endpoint Ready for Read/Write */ + if (Endpoint_ReadWriteAllowed()) + { + USB_JoystickReport_Data_t JoystickReportData; + + /* Create the next HID report to send to the host */ + GetNextReport(&JoystickReportData); + + /* Write Joystick Report Data */ + Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData)); + + /* Finalize the stream transfer to send the last packet */ + Endpoint_ClearCurrentBank(); + + /* Clear the report data afterwards */ + JoystickReportData.X = 0; + JoystickReportData.Y = 0; + JoystickReportData.Button = 0; + } + } +} -- cgit v1.2.3