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Diffstat (limited to 'Demos/Joystick/Joystick.c')
-rw-r--r-- | Demos/Joystick/Joystick.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/Demos/Joystick/Joystick.c b/Demos/Joystick/Joystick.c new file mode 100644 index 000000000..88d415843 --- /dev/null +++ b/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;
+ }
+ }
+}
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