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139 lines
4.7 KiB
139 lines
4.7 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 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 disclaim 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 XPLAINBridge project. This file contains the main tasks of
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* the demo and is responsible for the initial application hardware configuration.
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*/
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#include "XPLAINBridge.h"
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/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
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RingBuff_t USBtoUART_Buffer;
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/** Circular buffer to hold data from the serial port before it is sent to the host. */
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RingBuff_t UARTtoUSB_Buffer;
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/** LUFA CDC Class driver interface configuration and state information. This structure is
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* passed to all CDC Class driver functions, so that multiple instances of the same class
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* within a device can be differentiated from one another.
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*/
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USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
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{
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.Config =
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{
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.ControlInterfaceNumber = 0,
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.DataINEndpointNumber = CDC_TX_EPNUM,
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.DataINEndpointSize = CDC_TXRX_EPSIZE,
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.DataINEndpointDoubleBank = false,
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.DataOUTEndpointNumber = CDC_RX_EPNUM,
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.DataOUTEndpointSize = CDC_TXRX_EPSIZE,
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.DataOUTEndpointDoubleBank = false,
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.NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
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.NotificationEndpointSize = CDC_NOTIFICATION_EPSIZE,
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.NotificationEndpointDoubleBank = false,
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},
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};
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/** Main program entry point. This routine contains the overall program flow, including initial
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* setup of all components and the main program loop.
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*/
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int main(void)
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{
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SetupHardware();
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Buffer_Initialize(&USBtoUART_Buffer);
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Buffer_Initialize(&UARTtoUSB_Buffer);
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for (;;)
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{
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/* Read bytes from the USB OUT endpoint into the UART transmit buffer */
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for (uint8_t DataBytesRem = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--)
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{
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if (!(BUFF_STATICSIZE - USBtoUART_Buffer.Elements))
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break;
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Buffer_StoreElement(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
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}
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/* Read bytes from the UART receive buffer into the USB IN endpoint */
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if (UARTtoUSB_Buffer.Elements)
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CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Buffer_GetElement(&UARTtoUSB_Buffer));
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/* Load bytes from the UART transmit buffer into the UART */
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if ((USBtoUART_Buffer.Elements) && SoftUART_IsReady())
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SoftUART_TxByte(Buffer_GetElement(&USBtoUART_Buffer));
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/* Load bytes from the UART into the UART receive buffer */
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if(SoftUART_IsReceived())
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Buffer_StoreElement(&UARTtoUSB_Buffer, SoftUART_RxByte());
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CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
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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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/* 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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/* Hardware Initialization */
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SoftUART_Init();
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LEDs_Init();
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USB_Init();
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PORTD |= (1 << 5); // PD5 is connected to the XMEGA /RESET, enable pullup
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}
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/** Event handler for the library USB Configuration Changed event. */
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void EVENT_USB_Device_ConfigurationChanged(void)
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{
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LEDs_SetAllLEDs(LEDS_LED1);
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if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
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LEDs_SetAllLEDs(LEDS_NO_LEDS);
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}
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/** Event handler for the library USB Unhandled Control Request event. */
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void EVENT_USB_Device_UnhandledControlRequest(void)
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{
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CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
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}
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