/* * Copyright (c) 2006, Technical University of Munich * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file is part of the Contiki operating system. * * Author: Simon Barner <barner@in.tum.de> * * @(#)$$ */ #include "contiki-raven.h" #include "contiki.h" #include "usb_drv.h" #include "usb_descriptors.h" #include "usb_specific_request.h" #include <util/delay.h> #include "bootloader.h" uint8_t checkForFinger(void); uint8_t fingerPresent = 0; /* Defining this allows you to mount the USB Stick as a mass storage device by shorting the two pins. See docs. */ //#define WINXPSP2 void init_lowlevel(void) { Leds_init(); Leds_off(); if (checkForFinger()) { if(bootloader_is_present()) Jump_To_Bootloader(); #ifdef WINXPSP2 usb_mode = mass_storage; #else fingerPresent = 1; #endif } return; } uint8_t checkForFinger(void) { uint8_t tests; uint8_t matches; /* Three pads on RZUSBSTICK go: GND PD3 PD2 We pulse PD3, and check for that pattern on PD2. A (moist) finger across those three pads should be enough to bridge these */ //Output DDRD |= 1<<PD3; //Input DDRD &= ~(1<<PD2); tests = 100; matches = 0; while(tests) { //Set bit PD3 to value of LSB of 'tests' PORTD = (PORTD & ~(1<<PD3)) | ( (tests & 0x01) << PD3); //Allow changes to propogate _delay_us(1); //Check if PD2 matches what we set PD3 to if ((PIND & (1<<PD2)) == ((tests & 0x01) << PD2)) { matches++; } tests--; } if (matches > 70) { return 1; } return 0; }