+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2009.\r
+ \r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.fourwalledcubicle.com\r
+*/\r
+\r
+/*\r
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+\r
+ Permission to use, copy, modify, and distribute this software\r
+ and its documentation for any purpose and without fee is hereby\r
+ granted, provided that the above copyright notice appear in all\r
+ copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting\r
+ documentation, and that the name of the author not be used in\r
+ advertising or publicity pertaining to distribution of the\r
+ software without specific, written prior permission.\r
+\r
+ The author disclaim all warranties with regard to this\r
+ software, including all implied warranties of merchantability\r
+ and fitness. In no event shall the author be liable for any\r
+ special, indirect or consequential damages or any damages\r
+ whatsoever resulting from loss of use, data or profits, whether\r
+ in an action of contract, negligence or other tortious action,\r
+ arising out of or in connection with the use or performance of\r
+ this software.\r
+*/\r
+\r
+/** \file\r
+ *\r
+ * Main source file for the CDC demo. This file contains the main tasks of the demo and\r
+ * is responsible for the initial application hardware configuration.\r
+ */\r
+\r
+#include "CDC.h"\r
+\r
+/** Contains the current baud rate and other settings of the virtual serial port. While this demo does not use\r
+ * the physical USART and thus does not use these settings, they must still be retained and returned to the host\r
+ * upon request or the host will assume the device is non-functional.\r
+ *\r
+ * These values are set by the host via a class-specific request, however they are not required to be used accurately.\r
+ * It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical\r
+ * serial link characteristics and instead sends and receives data in endpoint streams.\r
+ */\r
+CDC_Line_Coding_t LineEncoding = { .BaudRateBPS = 0,\r
+ .CharFormat = OneStopBit,\r
+ .ParityType = Parity_None,\r
+ .DataBits = 8 };\r
+\r
+\r
+#if 0\r
+/* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in\r
+ * <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).\r
+ */\r
+ \r
+static int CDC_putchar(char c, FILE *stream)\r
+{ \r
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);\r
+\r
+ if (!(LineEncoding.BaudRateBPS))\r
+ return -1;\r
+ \r
+ if (Endpoint_WaitUntilReady())\r
+ return -1;\r
+\r
+ Endpoint_Write_Byte(c);\r
+ Endpoint_ClearIN();\r
+ \r
+ return 0;\r
+}\r
+\r
+static int CDC_getchar(FILE *stream)\r
+{\r
+ int c;\r
+\r
+ if (!(LineEncoding.BaudRateBPS))\r
+ return -1;\r
+\r
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);\r
+ \r
+ for (;;)\r
+ {\r
+ if (Endpoint_WaitUntilReady())\r
+ return -1;\r
+ \r
+ if (!(Endpoint_BytesInEndpoint()))\r
+ {\r
+ Endpoint_ClearOUT();\r
+ }\r
+ else\r
+ {\r
+ c = Endpoint_Read_Byte();\r
+ break;\r
+ }\r
+ }\r
+ \r
+ return c;\r
+}\r
+\r
+static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);\r
+#endif\r
+\r
+/** Main program entry point. This routine contains the overall program flow, including initial\r
+ * setup of all components and the main program loop.\r
+ */\r
+int main(void)\r
+{\r
+ SetupHardware();\r
+ \r
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
+\r
+ for (;;)\r
+ {\r
+ CDC_Task();\r
+ USB_USBTask();\r
+ }\r
+}\r
+\r
+/** Configures the board hardware and chip peripherals for the demo's functionality. */\r
+void SetupHardware(void)\r
+{\r
+ /* Disable watchdog if enabled by bootloader/fuses */\r
+ MCUSR &= ~(1 << WDRF);\r
+ wdt_disable();\r
+\r
+ /* Disable clock division */\r
+ clock_prescale_set(clock_div_1);\r
+\r
+ /* Hardware Initialization */\r
+ Joystick_Init();\r
+ LEDs_Init();\r
+ USB_Init();\r
+}\r
+\r
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and\r
+ * starts the library USB task to begin the enumeration and USB management process.\r
+ */\r
+void EVENT_USB_Device_Connect(void)\r
+{\r
+ /* Indicate USB enumerating */\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
+}\r
+\r
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
+ * the status LEDs and stops the USB management and CDC management tasks.\r
+ */\r
+void EVENT_USB_Device_Disconnect(void)\r
+{\r
+ /* Indicate USB not ready */\r
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
+}\r
+\r
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
+ * of the USB device after enumeration - the device endpoints are configured and the CDC management task started.\r
+ */\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r
+{\r
+ /* Indicate USB connected and ready */\r
+ LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
+\r
+ /* Setup CDC Notification, Rx and Tx Endpoints */\r
+ if (!(Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,\r
+ ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE)))\r
+ {\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
+ }\r
+ \r
+ if (!(Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,\r
+ ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE)))\r
+ {\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
+ }\r
+ \r
+ if (!(Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,\r
+ ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,\r
+ ENDPOINT_BANK_SINGLE)))\r
+ {\r
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
+ }\r
+ \r
+ /* Reset line encoding baud rate so that the host knows to send new values */\r
+ LineEncoding.BaudRateBPS = 0;\r
+}\r
+\r
+/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific\r
+ * control requests that are not handled internally by the USB library (including the CDC control commands,\r
+ * which are all issued via the control endpoint), so that they can be handled appropriately for the application.\r
+ */\r
+void EVENT_USB_Device_UnhandledControlRequest(void)\r
+{\r
+ /* Process CDC specific control requests */\r
+ switch (USB_ControlRequest.bRequest)\r
+ {\r
+ case REQ_GetLineEncoding:\r
+ if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ { \r
+ /* Acknowledge the SETUP packet, ready for data transfer */\r
+ Endpoint_ClearSETUP();\r
+\r
+ /* Write the line coding data to the control endpoint */\r
+ Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_Line_Coding_t));\r
+ \r
+ /* Finalize the stream transfer to send the last packet or clear the host abort */\r
+ Endpoint_ClearOUT();\r
+ }\r
+ \r
+ break;\r
+ case REQ_SetLineEncoding:\r
+ if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ /* Acknowledge the SETUP packet, ready for data transfer */\r
+ Endpoint_ClearSETUP();\r
+\r
+ /* Read the line coding data in from the host into the global struct */\r
+ Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_Line_Coding_t));\r
+\r
+ /* Finalize the stream transfer to clear the last packet from the host */\r
+ Endpoint_ClearIN();\r
+ }\r
+ \r
+ break;\r
+ case REQ_SetControlLineState:\r
+ if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))\r
+ {\r
+ /* Acknowledge the SETUP packet, ready for data transfer */\r
+ Endpoint_ClearSETUP();\r
+ \r
+ /* NOTE: Here you can read in the line state mask from the host, to get the current state of the output handshake\r
+ lines. The mask is read in from the wValue parameter in USB_ControlRequest, and can be masked against the\r
+ CONTROL_LINE_OUT_* masks to determine the RTS and DTR line states using the following code:\r
+ */\r
+ \r
+ Endpoint_ClearStatusStage();\r
+ }\r
+ \r
+ break;\r
+ }\r
+}\r
+\r
+/** Function to manage CDC data transmission and reception to and from the host. */\r
+void CDC_Task(void)\r
+{\r
+ char* ReportString = NULL;\r
+ uint8_t JoyStatus_LCL = Joystick_GetStatus();\r
+ static bool ActionSent = false;\r
+ \r
+ /* Device must be connected and configured for the task to run */\r
+ if (USB_DeviceState != DEVICE_STATE_Configured)\r
+ return;\r
+ \r
+#if 0\r
+ /* NOTE: Here you can use the notification endpoint to send back line state changes to the host, for the special RS-232\r
+ * handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code:\r
+ */\r
+ USB_Notification_Header_t Notification = (USB_Notification_Header_t)\r
+ {\r
+ .NotificationType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),\r
+ .Notification = NOTIF_SerialState,\r
+ .wValue = 0,\r
+ .wIndex = 0,\r
+ .wLength = sizeof(uint16_t),\r
+ };\r
+ \r
+ uint16_t LineStateMask;\r
+ \r
+ // Set LineStateMask here to a mask of CONTROL_LINE_IN_* masks to set the input handshake line states to send to the host\r
+ \r
+ Endpoint_SelectEndpoint(CDC_NOTIFICATION_EPNUM);\r
+ Endpoint_Write_Stream_LE(&Notification, sizeof(Notification));\r
+ Endpoint_Write_Stream_LE(&LineStateMask, sizeof(LineStateMask));\r
+ Endpoint_ClearIN();\r
+#endif\r
+\r
+ /* Determine if a joystick action has occurred */\r
+ if (JoyStatus_LCL & JOY_UP)\r
+ ReportString = "Joystick Up\r\n";\r
+ else if (JoyStatus_LCL & JOY_DOWN)\r
+ ReportString = "Joystick Down\r\n";\r
+ else if (JoyStatus_LCL & JOY_LEFT)\r
+ ReportString = "Joystick Left\r\n";\r
+ else if (JoyStatus_LCL & JOY_RIGHT)\r
+ ReportString = "Joystick Right\r\n";\r
+ else if (JoyStatus_LCL & JOY_PRESS)\r
+ ReportString = "Joystick Pressed\r\n";\r
+ else\r
+ ActionSent = false;\r
+\r
+ /* Flag management - Only allow one string to be sent per action */\r
+ if ((ReportString != NULL) && (ActionSent == false) && LineEncoding.BaudRateBPS)\r
+ {\r
+ ActionSent = true;\r
+\r
+ /* Select the Serial Tx Endpoint */\r
+ Endpoint_SelectEndpoint(CDC_TX_EPNUM);\r
+\r
+ /* Write the String to the Endpoint */\r
+ Endpoint_Write_Stream_LE(ReportString, strlen(ReportString));\r
+ \r
+ /* Remember if the packet to send completely fills the endpoint */\r
+ bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);\r
+\r
+ /* Finalize the stream transfer to send the last packet */\r
+ Endpoint_ClearIN();\r
+\r
+ /* If the last packet filled the endpoint, send an empty packet to release the buffer on \r
+ * the receiver (otherwise all data will be cached until a non-full packet is received) */\r
+ if (IsFull)\r
+ {\r
+ /* Wait until the endpoint is ready for another packet */\r
+ Endpoint_WaitUntilReady();\r
+ \r
+ /* Send an empty packet to ensure that the host does not buffer data sent to it */\r
+ Endpoint_ClearIN();\r
+ }\r
+ }\r
+\r
+ /* Select the Serial Rx Endpoint */\r
+ Endpoint_SelectEndpoint(CDC_RX_EPNUM);\r
+ \r
+ /* Throw away any received data from the host */\r
+ if (Endpoint_IsOUTReceived())\r
+ Endpoint_ClearOUT();\r
+}\r
projects / pub / lufa.git / blobdiff