Add new TemperatureDataLogger project, a simple USB Mass Storage class Temperature Data Logger using the onboard Dataflash and Temperature sensor.

Projects/TemperatureDataLogger/TempDataLogger.c

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+/*
+             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, distribute, and sell this 
+  software and its documentation for any purpose is hereby granted
+  without fee, 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 TemperatureDataLogger project. This file contains the main tasks of
+ *  the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "TempDataLogger.h"
+
+/** LUFA Mass Storage Class driver interface configuration and state information. This structure is
+ *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
+ *  within a device can be differentiated from one another.
+ */
+USB_ClassInfo_MS_Device_t Disk_MS_Interface =
+	{
+		.Config =
+			{
+				.InterfaceNumber           = 0,
+
+				.DataINEndpointNumber      = MASS_STORAGE_IN_EPNUM,
+				.DataINEndpointSize        = MASS_STORAGE_IO_EPSIZE,
+				.DataINEndpointDoubleBank  = false,
+
+				.DataOUTEndpointNumber     = MASS_STORAGE_OUT_EPNUM,
+				.DataOUTEndpointSize       = MASS_STORAGE_IO_EPSIZE,
+				.DataOUTEndpointDoubleBank = false,
+
+				.TotalLUNs                 = 1,
+			},
+	};
+
+/** FAT Fs structure to hold the internal state of the FAT driver for the dataflash contents. */
+FATFS DiskFATState;
+
+/** FAT Fs structure to hold a FAT file handle for the log data write destination. */
+FIL TempLogFile;
+
+/** Counter to count the number of 10 millisecond tick that has elapsed since the last sample */
+uint16_t CurrentLogTick;
+
+
+ISR(TIMER1_COMPA_vect, ISR_BLOCK)
+{
+	if (CurrentLogTick++ != LOG_INTERVAL_10MS)
+	  return;
+	  
+	CurrentLogTick = 0;
+
+	if (USB_DeviceState == DEVICE_STATE_Unattached)
+	{
+		f_printf(&TempLogFile, "%d Degrees\r\n", Temperature_GetTemperature());
+		f_sync(&TempLogFile);
+	}
+}
+
+
+/** Main program entry point. This routine contains the overall program flow, including initial
+ *  setup of all components and the main program loop.
+ */
+int main(void)
+{
+	SetupHardware();
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+
+	/* Mount and open the log file on the dataflash FAT partition */
+	f_mount(0, &DiskFATState);
+	f_open(&TempLogFile, LOG_FILENAME, FA_OPEN_ALWAYS | FA_WRITE);
+	f_lseek(&TempLogFile, TempLogFile.fsize);
+
+	/* Write out the log seperator line */
+	f_printf(&TempLogFile, "===========================\r\n");
+	Temperature_GetTemperature(); // Discard first temperature reading to ensure accuracy
+
+	for (;;)
+	{
+		MS_Device_USBTask(&Disk_MS_Interface);
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+
+	/* Hardware Initialization */
+	LEDs_Init();
+	SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
+	Dataflash_Init();
+	USB_Init();
+	ADC_Init(ADC_REFERENCE_AVCC | ADC_FREE_RUNNING | ADC_PRESCALE_128);
+	Temperature_Init();
+	
+	/* 10ms interval timer configuration */
+	OCR1A   = (((F_CPU / 1024) / 100) - 1);
+	TCCR1A  = (1 << WGM01);  // CTC mode
+	TCCR1B  = (1 << CS12) | (1 << CS10);   // Fcpu/1024 speed
+	TIMSK1  = (1 << OCIE1A);
+
+	/* Clear Dataflash sector protections, if enabled */
+	DataflashManager_ResetDataflashProtections();
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Device_Connect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+
+	/* Close the log file so that the host has exclusive filesystem access */
+	f_close(&TempLogFile);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Device_Disconnect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	
+	/* When disconnected from the host, re-open log file so we can resume logging */
+	f_mount(0, &DiskFATState);
+	f_open(&TempLogFile, LOG_FILENAME, FA_OPEN_ALWAYS | FA_WRITE);
+	f_lseek(&TempLogFile, TempLogFile.fsize);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+
+	if (!(MS_Device_ConfigureEndpoints(&Disk_MS_Interface)))
+	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Unhandled Control Request event. */
+void EVENT_USB_Device_UnhandledControlRequest(void)
+{
+	MS_Device_ProcessControlRequest(&Disk_MS_Interface);
+}
+
+/** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
+ *
+ *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
+ */
+bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
+{
+	bool CommandSuccess;
+	
+	LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
+	CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+	
+	return CommandSuccess;
+}