Projects/AVRISP/AVRISP.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 AVRISP project. This file contains the main tasks of
  34  *  the project and is responsible for the initial application hardware configuration.
  35  */
  36
  37 // TODO: Add in software SPI for lower programming speeds below 125KHz
  38 // TODO: Add reversed/shorted target connector checks
  39
  40 #include "AVRISP.h"
  41
  42 /** Main program entry point. This routine contains the overall program flow, including initial
  43  *  setup of all components and the main program loop.
  44  */
  45 int main(void)
  46 {
  47         SetupHardware();
  48
  49         V2Params_LoadNonVolatileParamValues();
  50
  51         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  52
  53         for (;;)
  54         {
  55                 Process_AVRISP_Commands();
  56
  57                 V2Params_UpdateParamValues();
  58
  59                 USB_USBTask();
  60         }
  61 }
  62
  63 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  64 void SetupHardware(void)
  65 {
  66         /* Disable watchdog if enabled by bootloader/fuses */
  67         MCUSR &= ~(1 << WDRF);
  68         wdt_disable();
  69
  70         /* Disable clock division */
  71         clock_prescale_set(clock_div_1);
  72
  73         /* Hardware Initialization */
  74         LEDs_Init();
  75         USB_Init();
  76
  77         #if defined(ADC)
  78         /* Initialize the ADC converter for VTARGET level detection on supported AVR models */
  79         ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
  80         ADC_SetupChannel(VTARGET_ADC_CHANNEL);
  81         ADC_StartReading(VTARGET_ADC_CHANNEL | ADC_RIGHT_ADJUSTED | ADC_REFERENCE_AVCC);
  82         #endif
  83
  84         /* Millisecond timer initialization for timeouts and delays */
  85         OCR0A  = ((F_CPU / 64) / 1000);
  86         TCCR0A = (1 << WGM01);
  87         TCCR0B = ((1 << CS01) | (1 << CS00));
  88 }
  89
  90 /** Event handler for the library USB Connection event. */
  91 void EVENT_USB_Device_Connect(void)
  92 {
  93         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  94 }
  95
  96 /** Event handler for the library USB Disconnection event. */
  97 void EVENT_USB_Device_Disconnect(void)
  98 {
  99         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 100 }
 101
 102 /** Event handler for the library USB Configuration Changed event. */
 103 void EVENT_USB_Device_ConfigurationChanged(void)
 104 {
 105         /* Indicate USB connected and ready */
 106         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 107
 108         /* Setup AVRISP data Endpoints */
 109         if (!(Endpoint_ConfigureEndpoint(AVRISP_DATA_EPNUM, EP_TYPE_BULK,
 110                                              ENDPOINT_DIR_OUT, AVRISP_DATA_EPSIZE,
 111                                          ENDPOINT_BANK_SINGLE)))
 112         {
 113                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 114         }
 115 }
 116
 117 /** Processes incomming V2 Protocol commands from the host, returning a response when required. */
 118 void Process_AVRISP_Commands(void)
 119 {
 120         /* Device must be connected and configured for the task to run */
 121         if (USB_DeviceState != DEVICE_STATE_Configured)
 122           return;
 123
 124         Endpoint_SelectEndpoint(AVRISP_DATA_EPNUM);
 125
 126         /* Check to see if a V2 Protocol command has been received - if not, abort */
 127         if (!(Endpoint_IsOUTReceived()))
 128           return;
 129
 130         /* Pass off processing of the V2 Protocol command to the V2 Protocol handler */
 131         V2Protocol_ProcessCommand();
 132 }
 133