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Diffstat (limited to 'Demos/MouseViaInt/MouseViaInt.c')
| -rw-r--r-- | Demos/MouseViaInt/MouseViaInt.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/Demos/MouseViaInt/MouseViaInt.c b/Demos/MouseViaInt/MouseViaInt.c new file mode 100644 index 000000000..77e4c565e --- /dev/null +++ b/Demos/MouseViaInt/MouseViaInt.c @@ -0,0 +1,389 @@ +/*
+ 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 MouseViaInt demo. This file contains the main tasks of the demo and
+ * is responsible for the initial application hardware configuration.
+ */
+
+#include "MouseViaInt.h"
+
+/* Project Tags, for reading out using the ButtLoad project */
+BUTTLOADTAG(ProjName, "LUFA MouseI 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 },
+};
+
+/* 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 moves the mouse).
+ */
+uint8_t IdleCount = 0;
+
+/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle
+ * milliseconds. This is seperate 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)
+{
+ /* 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();
+
+ /* 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);
+
+ /* 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);
+
+ /* 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 and stops the USB management task.
+ */
+EVENT_HANDLER(USB_Disconnect)
+{
+ /* Stop running mouse reporting and USB management tasks */
+ 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 sets the current configuration
+ * of the USB device after enumeration, and configures the mouse device endpoints.
+ */
+EVENT_HANDLER(USB_ConfigurationChanged)
+{
+ /* Setup Mouse Report Endpoint */
+ Endpoint_ConfigureEndpoint(MOUSE_EPNUM, EP_TYPE_INTERRUPT,
+ ENDPOINT_DIR_IN, MOUSE_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+
+ /* Enable the endpoint IN interrupt ISR for the report endpoint */
+ USB_INT_Enable(ENDPOINT_INT_IN);
+
+ /* Indicate USB connected and ready */
+ UpdateStatus(Status_USBReady);
+}
+
+/** 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_MouseReport_Data_t MouseReportData;
+
+ /* Create the next mouse report for transmission to the host */
+ GetNextReport(&MouseReportData);
+
+ /* 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(MouseReportData))
+ wLength = sizeof(MouseReportData);
+
+ Endpoint_ClearSetupReceived();
+
+ /* Write the report data to the control endpoint */
+ Endpoint_Write_Control_Stream_LE(&MouseReportData, wLength);
+
+ /* Clear the report data afterwards */
+ memset(&MouseReportData, 0, sizeof(MouseReportData));
+
+ /* Finalize the stream transfer to send the last packet or clear the host abort */
+ Endpoint_ClearSetupOUT();
+ }
+
+ break;
+ case REQ_GetProtocol:
+ if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ Endpoint_ClearSetupReceived();
+
+ /* Write the current protocol flag to the host */
+ Endpoint_Write_Byte(UsingReportProtocol);
+
+ /* Send the flag to the host */
+ Endpoint_ClearSetupIN();
+ }
+
+ break;
+ case REQ_SetProtocol:
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ /* Read in the wValue parameter containing the new protocol mode */
+ uint16_t wValue = Endpoint_Read_Word_LE();
+
+ Endpoint_ClearSetupReceived();
+
+ /* Set or clear the flag depending on what the host indicates that the current Protocol should be */
+ UsingReportProtocol = (wValue != 0x0000);
+
+ /* Send an empty packet to acknowedge the command */
+ Endpoint_ClearSetupIN();
+ }
+
+ break;
+ case REQ_SetIdle:
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ /* Read in the wValue parameter containing the idle period */
+ uint16_t wValue = Endpoint_Read_Word_LE();
+
+ Endpoint_ClearSetupReceived();
+
+ /* Get idle period in MSB */
+ IdleCount = (wValue >> 8);
+
+ /* Send an empty packet to acknowedge the command */
+ Endpoint_ClearSetupIN();
+ }
+
+ break;
+ case REQ_GetIdle:
+ if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
+ {
+ Endpoint_ClearSetupReceived();
+
+ /* Write the current idle duration to the host */
+ Endpoint_Write_Byte(IdleCount);
+
+ /* Send the flag to the host */
+ Endpoint_ClearSetupIN();
+ }
+
+ 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
+ *
+ * \return Boolean true if the new report differs from the last report, false otherwise
+ */
+bool GetNextReport(USB_MouseReport_Data_t* ReportData)
+{
+ static uint8_t PrevJoyStatus = 0;
+ static bool PrevHWBStatus = false;
+ uint8_t JoyStatus_LCL = Joystick_GetStatus();
+ bool InputChanged = false;
+
+ /* Clear the report contents */
+ memset(ReportData, 0, sizeof(USB_MouseReport_Data_t));
+
+ if (JoyStatus_LCL & JOY_UP)
+ ReportData->Y = -1;
+ else if (JoyStatus_LCL & JOY_DOWN)
+ ReportData->Y = 1;
+
+ if (JoyStatus_LCL & JOY_RIGHT)
+ ReportData->X = 1;
+ else if (JoyStatus_LCL & JOY_LEFT)
+ ReportData->X = -1;
+
+ if (JoyStatus_LCL & JOY_PRESS)
+ ReportData->Button = (1 << 0);
+
+ if (HWB_GetStatus())
+ ReportData->Button |= (1 << 1);
+
+ /* Check if the new report is different to the previous report */
+ InputChanged = ((uint8_t)(PrevJoyStatus ^ JoyStatus_LCL) | (uint8_t)(HWB_GetStatus() ^ PrevHWBStatus));
+
+ /* Save the current joystick and HWB status for later comparison */
+ PrevJoyStatus = JoyStatus_LCL;
+ PrevHWBStatus = HWB_GetStatus();
+
+ /* 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 MouseViaInt_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);
+}
+
+/** ISR for the general Pipe/Endpoint interrupt vector. This ISR fires when an endpoint's status changes (such as
+ * a packet has been received) on an endpoint with its corresponding ISR enabling bits set. This is used to send
+ * HID packets to the host each time the HID interrupt endpoints polling period elapses, as managed by the USB
+ * controller.
+ */
+ISR(ENDPOINT_PIPE_vect, ISR_BLOCK)
+{
+ /* Save previously selected endpoint before selecting a new endpoint */
+ uint8_t PrevSelectedEndpoint = Endpoint_GetCurrentEndpoint();
+
+ /* Check if mouse endpoint has interrupted */
+ if (Endpoint_HasEndpointInterrupted(MOUSE_EPNUM))
+ {
+ USB_MouseReport_Data_t MouseReportData;
+ bool SendReport = true;
+
+ /* Create the next mouse report for transmission to the host */
+ GetNextReport(&MouseReportData);
+
+ /* Check if the idle period is set*/
+ if (IdleCount)
+ {
+ /* Determine if the idle period has elapsed */
+ if (!(IdleMSRemaining))
+ {
+ /* Reset the idle time remaining counter, must multiply by 4 to get the duration in milliseconds */
+ IdleMSRemaining = (IdleCount << 2);
+ }
+ else
+ {
+ /* Idle period not elapsed, indicate that a report must not be sent */
+ SendReport = false;
+ }
+ }
+
+ /* Check to see if a report should be issued */
+ if (SendReport)
+ {
+ /* Select the Mouse Report Endpoint */
+ Endpoint_SelectEndpoint(MOUSE_EPNUM);
+
+ /* Clear the endpoint IN interrupt flag */
+ USB_INT_Clear(ENDPOINT_INT_IN);
+
+ /* Clear the Mouse Report endpoint interrupt and select the endpoint */
+ Endpoint_ClearEndpointInterrupt(MOUSE_EPNUM);
+
+ /* Write Mouse Report Data */
+ Endpoint_Write_Stream_LE(&MouseReportData, sizeof(MouseReportData));
+ }
+
+ /* Finalize the stream transfer to send the last packet */
+ Endpoint_ClearCurrentBank();
+ }
+
+ /* Restore previously selected endpoint */
+ Endpoint_SelectEndpoint(PrevSelectedEndpoint);
+}
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