295 lines
10 KiB
C
295 lines
10 KiB
C
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/*
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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 RNDISEthernet 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 "RNDISEthernet.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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/* Webserver Initialization */
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TCP_Init();
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Webserver_Init();
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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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Ethernet_Task();
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TCP_Task();
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RNDIS_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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LEDs_Init();
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Serial_Init(9600, false);
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USB_Init();
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/* Create a stdio stream for the serial port for stdin and stdout */
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Serial_CreateStream(NULL);
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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 all the relevant 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 sets the current configuration
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* of the USB device after enumeration, and configures the RNDIS device endpoints and starts the relevant tasks.
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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 RNDIS Data Endpoints */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_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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/* Process RNDIS class commands */
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switch (USB_ControlRequest.bRequest)
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{
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case RNDIS_REQ_SendEncapsulatedCommand:
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if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Read in the RNDIS message into the message buffer */
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Endpoint_Read_Control_Stream_LE(RNDISMessageBuffer, USB_ControlRequest.wLength);
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Endpoint_ClearIN();
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/* Process the RNDIS message */
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ProcessRNDISControlMessage();
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}
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break;
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case RNDIS_REQ_GetEncapsulatedResponse:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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/* Check if a response to the last message is ready */
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if (!(MessageHeader->MessageLength))
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{
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/* Set the response to a single 0x00 byte to indicate that no response is ready */
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RNDISMessageBuffer[0] = 0;
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MessageHeader->MessageLength = 1;
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}
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Endpoint_ClearSETUP();
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/* Write the message response data to the endpoint */
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Endpoint_Write_Control_Stream_LE(RNDISMessageBuffer, MessageHeader->MessageLength);
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Endpoint_ClearOUT();
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/* Reset the message header once again after transmission */
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MessageHeader->MessageLength = 0;
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}
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break;
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}
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}
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/** Task to manage the sending and receiving of encapsulated RNDIS data and notifications. This removes the RNDIS
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* wrapper from received Ethernet frames and places them in the FrameIN global buffer, or adds the RNDIS wrapper
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* to a frame in the FrameOUT global before sending the buffer contents to the host.
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*/
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void RNDIS_Task(void)
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{
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/* Select the notification endpoint */
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Endpoint_SelectEndpoint(CDC_NOTIFICATION_EPADDR);
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/* Check if a message response is ready for the host */
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if (Endpoint_IsINReady() && ResponseReady)
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{
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USB_Request_Header_t Notification = (USB_Request_Header_t)
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{
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.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
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.bRequest = RNDIS_NOTIF_ResponseAvailable,
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.wValue = 0,
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.wIndex = 0,
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.wLength = 0,
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};
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/* Indicate that a message response is ready for the host */
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Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NULL);
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearIN();
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/* Indicate a response is no longer ready */
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ResponseReady = false;
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}
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/* Don't process the data endpoints until the system is in the data initialized state, and the buffer is free */
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if ((CurrRNDISState == RNDIS_Data_Initialized) && !(MessageHeader->MessageLength))
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{
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/* Create a new packet header for reading/writing */
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RNDIS_Packet_Message_t RNDISPacketHeader;
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/* Select the data OUT endpoint */
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Endpoint_SelectEndpoint(CDC_RX_EPADDR);
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/* Check if the data OUT endpoint contains data, and that the IN buffer is empty */
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if (Endpoint_IsOUTReceived() && !(FrameIN.FrameLength))
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{
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/* Read in the packet message header */
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Endpoint_Read_Stream_LE(&RNDISPacketHeader, sizeof(RNDIS_Packet_Message_t), NULL);
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/* Stall the request if the data is too large */
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if (RNDISPacketHeader.DataLength > ETHERNET_FRAME_SIZE_MAX)
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{
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Endpoint_StallTransaction();
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return;
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}
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/* Read in the Ethernet frame into the buffer */
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Endpoint_Read_Stream_LE(FrameIN.FrameData, RNDISPacketHeader.DataLength, NULL);
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearOUT();
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/* Store the size of the Ethernet frame */
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FrameIN.FrameLength = RNDISPacketHeader.DataLength;
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}
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/* Select the data IN endpoint */
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Endpoint_SelectEndpoint(CDC_TX_EPADDR);
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/* Check if the data IN endpoint is ready for more data, and that the IN buffer is full */
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if (Endpoint_IsINReady() && FrameOUT.FrameLength)
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{
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/* Clear the packet header with all 0s so that the relevant fields can be filled */
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memset(&RNDISPacketHeader, 0, sizeof(RNDIS_Packet_Message_t));
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/* Construct the required packet header fields in the buffer */
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RNDISPacketHeader.MessageType = REMOTE_NDIS_PACKET_MSG;
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RNDISPacketHeader.MessageLength = (sizeof(RNDIS_Packet_Message_t) + FrameOUT.FrameLength);
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RNDISPacketHeader.DataOffset = (sizeof(RNDIS_Packet_Message_t) - sizeof(RNDIS_Message_Header_t));
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RNDISPacketHeader.DataLength = FrameOUT.FrameLength;
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/* Send the packet header to the host */
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Endpoint_Write_Stream_LE(&RNDISPacketHeader, sizeof(RNDIS_Packet_Message_t), NULL);
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/* Send the Ethernet frame data to the host */
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Endpoint_Write_Stream_LE(FrameOUT.FrameData, RNDISPacketHeader.DataLength, NULL);
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/* Finalize the stream transfer to send the last packet */
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Endpoint_ClearIN();
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/* Indicate Ethernet OUT buffer no longer full */
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FrameOUT.FrameLength = 0;
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}
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}
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}
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/** Ethernet frame processing task. This task checks to see if a frame has been received, and if so hands off the processing
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* of the frame to the Ethernet processing routines.
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*/
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void Ethernet_Task(void)
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{
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/* Task for Ethernet processing. Incoming ethernet frames are loaded into the FrameIN structure, and
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outgoing frames should be loaded into the FrameOUT structure. Both structures can only hold a single
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Ethernet frame at a time, so the FrameInBuffer bool is used to indicate when the buffers contain data. */
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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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/* Check if a frame has been written to the IN frame buffer */
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if (FrameIN.FrameLength)
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{
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/* Indicate packet processing started */
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LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
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/* Process the ethernet frame - replace this with your own Ethernet handler code as desired */
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Ethernet_ProcessPacket();
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/* Indicate packet processing complete */
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LEDs_SetAllLEDs(LEDMASK_USB_READY);
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}
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}
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