Projects/TemperatureDataLogger/TempDataLogger.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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 /** Buffer to hold the previously generated HID report, for comparison purposes inside the HID class driver. */
  62 uint8_t PrevHIDReportBuffer[GENERIC_REPORT_SIZE];
  63
  64 /** LUFA HID Class driver interface configuration and state information. This structure is
  65  *  passed to all HID Class driver functions, so that multiple instances of the same class
  66  *  within a device can be differentiated from one another.
  67  */
  68 USB_ClassInfo_HID_Device_t Generic_HID_Interface =
  69         {
  70                 .Config =
  71                         {
  72                                 .InterfaceNumber              = 1,
  73
  74                                 .ReportINEndpointNumber       = GENERIC_IN_EPNUM,
  75                                 .ReportINEndpointSize         = GENERIC_EPSIZE,
  76                                 .ReportINEndpointDoubleBank   = false,
  77
  78                                 .PrevReportINBuffer           = PrevHIDReportBuffer,
  79                                 .PrevReportINBufferSize       = sizeof(PrevHIDReportBuffer),
  80                         },
  81         };
  82
  83 /** Non-volatile Logging Interval value in EEPROM, stored as a number of 500ms ticks */
  84 uint8_t EEMEM LoggingInterval500MS_EEPROM;
  85
  86 /** SRAM Logging Interval value fetched from EEPROM, stored as a number of 500ms ticks */
  87 uint8_t LoggingInterval500MS_SRAM;
  88
  89 /** Total number of 500ms logging ticks elapsed since the last log value was recorded */
  90 uint16_t CurrentLoggingTicks;
  91
  92 /** FAT Fs structure to hold the internal state of the FAT driver for the dataflash contents. */
  93 FATFS DiskFATState;
  94
  95 /** FAT Fs structure to hold a FAT file handle for the log data write destination. */
  96 FIL TempLogFile;
  97
  98
  99 /** ISR to handle the 500ms ticks for sampling and data logging */
 100 ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 101 {
 102         uint8_t LEDMask = LEDs_GetLEDs();
 103
 104         /* Check to see if the logging interval has expired */
 105         if (CurrentLoggingTicks++ < LoggingInterval500MS_SRAM)
 106           return;
 107
 108         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 109
 110         /* Reset log tick counter to prepare for next logging interval */
 111         CurrentLoggingTicks = 0;
 112
 113         /* Only log when not connected to a USB host */
 114         if (USB_DeviceState == DEVICE_STATE_Unattached)
 115         {
 116                 uint8_t Day,  Month,  Year;
 117                 uint8_t Hour, Minute, Second;
 118
 119                 DS1307_GetDate(&Day,  &Month,  &Year);
 120                 DS1307_GetTime(&Hour, &Minute, &Second);
 121
 122                 char     LineBuffer[100];
 123                 uint16_t BytesWritten;
 124
 125                 BytesWritten = sprintf(LineBuffer, "%02d/%02d/20%04d, %02d:%02d:%02d, %d Degrees\r\n",
 126                                                            Day, Month, Year, Hour, Minute, Second, Temperature_GetTemperature());
 127
 128                 f_write(&TempLogFile, LineBuffer, BytesWritten, &BytesWritten);
 129                 f_sync(&TempLogFile);
 130         }
 131
 132         LEDs_SetAllLEDs(LEDMask);
 133 }
 134
 135 /** Main program entry point. This routine contains the overall program flow, including initial
 136  *  setup of all components and the main program loop.
 137  */
 138 int main(void)
 139 {
 140         SetupHardware();
 141
 142         /* Fetch logging interval from EEPROM */
 143         LoggingInterval500MS_SRAM = eeprom_read_byte(&LoggingInterval500MS_EEPROM);
 144
 145         /* Mount and open the log file on the dataflash FAT partition */
 146         OpenLogFile();
 147
 148         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 149         sei();
 150
 151         /* Discard the first sample from the temperature sensor, as it is generally incorrect */
 152         volatile uint8_t Dummy = Temperature_GetTemperature();
 153         (void)Dummy;
 154
 155         for (;;)
 156         {
 157                 MS_Device_USBTask(&Disk_MS_Interface);
 158                 HID_Device_USBTask(&Generic_HID_Interface);
 159                 USB_USBTask();
 160         }
 161 }
 162
 163 /** Opens the log file on the Dataflash's FAT formatted partition according to the current date */
 164 void OpenLogFile(void)
 165 {
 166         char LogFileName[12];
 167
 168         /* Get the current date for the filename as "DDMMYY.csv" */
 169         uint8_t Day, Month, Year;
 170         DS1307_GetDate(&Day, &Month, &Year);
 171         sprintf(LogFileName, "%02d%02d%02d.csv", Day, Month, Year);
 172
 173         /* Mount the storage device, open the file */
 174         f_mount(0, &DiskFATState);
 175         f_open(&TempLogFile, LogFileName, FA_OPEN_ALWAYS | FA_WRITE);
 176         f_lseek(&TempLogFile, TempLogFile.fsize);
 177 }
 178
 179 /** Closes the open data log file on the Dataflash's FAT formatted partition */
 180 void CloseLogFile(void)
 181 {
 182         /* Sync any data waiting to be written, unmount the storage device */
 183         f_sync(&TempLogFile);
 184         f_close(&TempLogFile);
 185 }
 186
 187 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 188 void SetupHardware(void)
 189 {
 190         /* Disable watchdog if enabled by bootloader/fuses */
 191         MCUSR &= ~(1 << WDRF);
 192         wdt_disable();
 193
 194         /* Disable clock division */
 195         clock_prescale_set(clock_div_1);
 196
 197         /* Hardware Initialization */
 198         LEDs_Init();
 199         SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
 200         ADC_Init(ADC_REFERENCE_AVCC | ADC_FREE_RUNNING | ADC_PRESCALE_128);
 201         Temperature_Init();
 202         Dataflash_Init();
 203         USB_Init();
 204         TWI_Init();
 205
 206         /* 500ms logging interval timer configuration */
 207         OCR1A   = ((F_CPU / 1024) / 2);
 208         TCCR1B  = (1 << WGM12) | (1 << CS12) | (1 << CS10);
 209         TIMSK1  = (1 << OCIE1A);
 210
 211         /* Clear Dataflash sector protections, if enabled */
 212         DataflashManager_ResetDataflashProtections();
 213 }
 214
 215 /** Event handler for the library USB Connection event. */
 216 void EVENT_USB_Device_Connect(void)
 217 {
 218         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 219
 220         /* Close the log file so that the host has exclusive filesystem access */
 221         CloseLogFile();
 222 }
 223
 224 /** Event handler for the library USB Disconnection event. */
 225 void EVENT_USB_Device_Disconnect(void)
 226 {
 227         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 228
 229         /* Mount and open the log file on the dataflash FAT partition */
 230         OpenLogFile();
 231 }
 232
 233 /** Event handler for the library USB Configuration Changed event. */
 234 void EVENT_USB_Device_ConfigurationChanged(void)
 235 {
 236         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 237
 238         if (!(MS_Device_ConfigureEndpoints(&Disk_MS_Interface)))
 239           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 240
 241         if (!(HID_Device_ConfigureEndpoints(&Generic_HID_Interface)))
 242           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 243 }
 244
 245 /** Event handler for the library USB Unhandled Control Request event. */
 246 void EVENT_USB_Device_UnhandledControlRequest(void)
 247 {
 248         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 249         HID_Device_ProcessControlRequest(&Generic_HID_Interface);
 250 }
 251
 252 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 253  *
 254  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 255  */
 256 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 257 {
 258         bool CommandSuccess;
 259
 260         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 261         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 262         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 263
 264         return CommandSuccess;
 265 }
 266
 267 /** HID class driver callback function for the creation of HID reports to the host.
 268  *
 269  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 270  *  \param[in,out] ReportID  Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
 271  *  \param[in] ReportType  Type of the report to create, either REPORT_ITEM_TYPE_In or REPORT_ITEM_TYPE_Feature
 272  *  \param[out] ReportData  Pointer to a buffer where the created report should be stored
 273  *  \param[out] ReportSize  Number of bytes written in the report (or zero if no report is to be sent
 274  *
 275  *  \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
 276  */
 277 bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
 278                                          const uint8_t ReportType, void* ReportData, uint16_t* ReportSize)
 279 {
 280         Device_Report_t* ReportParams = (Device_Report_t*)ReportData;
 281
 282         DS1307_GetDate(&ReportParams->Day,  &ReportParams->Month,  &ReportParams->Year);
 283         DS1307_GetTime(&ReportParams->Hour, &ReportParams->Minute, &ReportParams->Second);
 284
 285         ReportParams->LogInterval500MS = LoggingInterval500MS_SRAM;
 286
 287         *ReportSize = sizeof(Device_Report_t);
 288         return true;
 289 }
 290
 291 /** HID class driver callback function for the processing of HID reports from the host.
 292  *
 293  *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 294  *  \param[in] ReportID  Report ID of the received report from the host
 295  *  \param[in] ReportData  Pointer to a buffer where the created report has been stored
 296  *  \param[in] ReportSize  Size in bytes of the received HID report
 297  */
 298 void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,
 299                                           const void* ReportData, const uint16_t ReportSize)
 300 {
 301         Device_Report_t* ReportParams = (Device_Report_t*)ReportData;
 302
 303         DS1307_SetDate(ReportParams->Day,  ReportParams->Month,  ReportParams->Year);
 304         DS1307_SetTime(ReportParams->Hour, ReportParams->Minute, ReportParams->Second);
 305
 306         /* If the logging interval has changed from its current value, write it to EEPROM */
 307         if (LoggingInterval500MS_SRAM != ReportParams->LogInterval500MS)
 308         {
 309                 LoggingInterval500MS_SRAM = ReportParams->LogInterval500MS;
 310                 eeprom_write_byte(&LoggingInterval500MS_EEPROM, LoggingInterval500MS_SRAM);
 311         }
 312 }