Projects/TemperatureDataLogger/TempDataLogger.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Main source file for the TemperatureDataLogger project. This file contains the main tasks of
  34  *  the project and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "TempDataLogger.h"
  38
  39 /** LUFA Mass Storage Class driver interface configuration and state information. This structure is
  40  *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_MS_Device_t Disk_MS_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .InterfaceNumber           = 0,
  48
  49                                 .DataINEndpointNumber      = MASS_STORAGE_IN_EPNUM,
  50                                 .DataINEndpointSize        = MASS_STORAGE_IO_EPSIZE,
  51                                 .DataINEndpointDoubleBank  = false,
  52
  53                                 .DataOUTEndpointNumber     = MASS_STORAGE_OUT_EPNUM,
  54                                 .DataOUTEndpointSize       = MASS_STORAGE_IO_EPSIZE,
  55                                 .DataOUTEndpointDoubleBank = false,
  56
  57                                 .TotalLUNs                 = 1,
  58                         },
  59         };
  60
  61 /** FAT Fs structure to hold the internal state of the FAT driver for the dataflash contents. */
  62 FATFS DiskFATState;
  63
  64 /** FAT Fs structure to hold a FAT file handle for the log data write destination. */
  65 FIL TempLogFile;
  66
  67 /** Counter to count the number of 10 millisecond tick that has elapsed since the last sample */
  68 uint16_t CurrentLogTick;
  69
  70
  71 ISR(TIMER1_COMPA_vect, ISR_BLOCK)
  72 {
  73         if (CurrentLogTick++ != LOG_INTERVAL_10MS)
  74           return;
  75
  76         CurrentLogTick = 0;
  77
  78         if (USB_DeviceState == DEVICE_STATE_Unattached)
  79         {
  80                 f_printf(&TempLogFile, "%d Degrees\r\n", Temperature_GetTemperature());
  81                 f_sync(&TempLogFile);
  82         }
  83 }
  84
  85
  86 /** Main program entry point. This routine contains the overall program flow, including initial
  87  *  setup of all components and the main program loop.
  88  */
  89 int main(void)
  90 {
  91         SetupHardware();
  92
  93         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  94
  95         /* Mount and open the log file on the dataflash FAT partition */
  96         f_mount(0, &DiskFATState);
  97         f_open(&TempLogFile, LOG_FILENAME, FA_OPEN_ALWAYS | FA_WRITE);
  98         f_lseek(&TempLogFile, TempLogFile.fsize);
  99
 100         /* Write out the log seperator line */
 101         f_printf(&TempLogFile, "===========================\r\n");
 102         Temperature_GetTemperature(); // Discard first temperature reading to ensure accuracy
 103
 104         for (;;)
 105         {
 106                 MS_Device_USBTask(&Disk_MS_Interface);
 107                 USB_USBTask();
 108         }
 109 }
 110
 111 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 112 void SetupHardware(void)
 113 {
 114         /* Disable watchdog if enabled by bootloader/fuses */
 115         MCUSR &= ~(1 << WDRF);
 116         wdt_disable();
 117
 118         /* Disable clock division */
 119         clock_prescale_set(clock_div_1);
 120
 121         /* Hardware Initialization */
 122         LEDs_Init();
 123         SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
 124         Dataflash_Init();
 125         USB_Init();
 126         ADC_Init(ADC_REFERENCE_AVCC | ADC_FREE_RUNNING | ADC_PRESCALE_128);
 127         Temperature_Init();
 128
 129         /* 10ms interval timer configuration */
 130         OCR1A   = (((F_CPU / 1024) / 100) - 1);
 131         TCCR1A  = (1 << WGM01);  // CTC mode
 132         TCCR1B  = (1 << CS12) | (1 << CS10);   // Fcpu/1024 speed
 133         TIMSK1  = (1 << OCIE1A);
 134
 135         /* Clear Dataflash sector protections, if enabled */
 136         DataflashManager_ResetDataflashProtections();
 137 }
 138
 139 /** Event handler for the library USB Connection event. */
 140 void EVENT_USB_Device_Connect(void)
 141 {
 142         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 143
 144         /* Close the log file so that the host has exclusive filesystem access */
 145         f_close(&TempLogFile);
 146 }
 147
 148 /** Event handler for the library USB Disconnection event. */
 149 void EVENT_USB_Device_Disconnect(void)
 150 {
 151         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 152
 153         /* When disconnected from the host, re-open log file so we can resume logging */
 154         f_mount(0, &DiskFATState);
 155         f_open(&TempLogFile, LOG_FILENAME, FA_OPEN_ALWAYS | FA_WRITE);
 156         f_lseek(&TempLogFile, TempLogFile.fsize);
 157 }
 158
 159 /** Event handler for the library USB Configuration Changed event. */
 160 void EVENT_USB_Device_ConfigurationChanged(void)
 161 {
 162         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 163
 164         if (!(MS_Device_ConfigureEndpoints(&Disk_MS_Interface)))
 165           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 166 }
 167
 168 /** Event handler for the library USB Unhandled Control Request event. */
 169 void EVENT_USB_Device_UnhandledControlRequest(void)
 170 {
 171         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 172 }
 173
 174 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 175  *
 176  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 177  */
 178 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* MSInterfaceInfo)
 179 {
 180         bool CommandSuccess;
 181
 182         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 183         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 184         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 185
 186         return CommandSuccess;
 187 }