Demos/OTG/TestApp/TestApp.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, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 TestApp demo. This file contains the main tasks of the demo and
  34  *  is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "TestApp.h"
  38
  39 /** Main program entry point. This routine configures the hardware required by the application, then
  40  *  starts the scheduler to run the application tasks.
  41  */
  42 int main(void)
  43 {
  44         SetupHardware();
  45
  46         puts_P(PSTR(ESC_FG_CYAN "LUFA Demo running.\r\n" ESC_FG_WHITE));
  47
  48         for (;;)
  49         {
  50                 CheckJoystick();
  51                 CheckButton();
  52                 CheckTemperature();
  53
  54                 /* Clear millisecond timer's Output Compare flag (logic 1 clears the flag) */
  55                 TIFR0 |= (1 << OCF0A);
  56
  57                 USB_USBTask();
  58         }
  59 }
  60
  61 void SetupHardware(void)
  62 {
  63         /* Disable watchdog if enabled by bootloader/fuses */
  64         MCUSR &= ~(1 << WDRF);
  65         wdt_disable();
  66
  67         /* Disable clock division */
  68         clock_prescale_set(clock_div_1);
  69
  70         /* Hardware initialization */
  71         SerialStream_Init(9600, false);
  72         ADC_Init(ADC_SINGLE_CONVERSION | ADC_PRESCALE_64);
  73         Temperature_Init();
  74         Joystick_Init();
  75         LEDs_Init();
  76         Buttons_Init();
  77
  78         /* Millisecond timer initialization */
  79         OCR0A  = 0x7D;
  80         TCCR0A = (1 << WGM01);
  81         TCCR0B = ((1 << CS01) | (1 << CS00));
  82 }
  83
  84 /** Task responsible for checking the joystick position, and displaying the joystick position onto the
  85  *  board LEDs.
  86  */
  87 void CheckJoystick(void)
  88 {
  89         uint8_t JoyStatus_LCL = Joystick_GetStatus();
  90         uint8_t LEDMask       = LEDS_NO_LEDS;
  91
  92         if (JoyStatus_LCL & JOY_UP)
  93           LEDMask |= LEDS_LED1;
  94
  95         if (JoyStatus_LCL & JOY_DOWN)
  96           LEDMask |= LEDS_LED2;
  97
  98         if (JoyStatus_LCL & JOY_LEFT)
  99           LEDMask |= LEDS_LED3;
 100
 101         if (JoyStatus_LCL & JOY_RIGHT)
 102           LEDMask |= LEDS_LED4;
 103
 104         if (JoyStatus_LCL & JOY_PRESS)
 105           LEDMask  = LEDS_ALL_LEDS;
 106
 107         LEDs_SetAllLEDs(LEDMask);
 108 }
 109
 110 /** Task responsible for checking the current temperature via the temperature sensor mounted on the
 111  *  board, and displaying it through the serial USART.
 112  */
 113 void CheckTemperature(void)
 114 {
 115         static uint16_t MSElapsed = 0;
 116
 117         /* Timer 0's compare flag is set every millisecond */
 118         if (TIFR0 & (1 << OCF0A))
 119           MSElapsed++;
 120
 121         /* Task runs every 10000 ticks, 10 seconds for this demo */
 122         if (MSElapsed == 10000)
 123         {
 124                 printf_P(PSTR("Current temperature: %d Degrees Celcius\r\n\r\n"),
 125                          (int8_t)Temperature_GetTemperature());
 126
 127                 MSElapsed = 0;
 128         }
 129 }
 130
 131 /** Task responsible for checking the board's first button' position, and start-stopping other tasks and the USB
 132  *  interface in response to user joystick movements.
 133  */
 134 void CheckButton(void)
 135 {
 136         static uint16_t DebounceMSElapsed = 0;
 137         static bool     IsPressed;
 138
 139         /* Timer 0's compare flag is set every millisecond */
 140         if (TIFR0 & (1 << OCF0A))
 141           DebounceMSElapsed++;
 142
 143         if (Buttons_GetStatus() & BUTTONS_BUTTON1)
 144         {
 145                 if (!(IsPressed) && (DebounceMSElapsed == 100))
 146                 {
 147                         IsPressed = true;
 148
 149                         if (USB_IsInitialized == true)
 150                         {
 151                                 USB_ShutDown();
 152                                 puts_P(PSTR(ESC_FG_YELLOW "USB Power Off.\r\n" ESC_FG_WHITE));
 153                         }
 154                         else
 155                         {
 156                                 puts_P(PSTR(ESC_FG_YELLOW "USB Power On.\r\n" ESC_FG_WHITE));
 157                                 USB_Init(USB_MODE_UID, USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL);
 158                         }
 159                 }
 160         }
 161     else
 162     {
 163                 DebounceMSElapsed = 0;
 164                 IsPressed = false;
 165         }
 166 }