Contiki 2.6
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00001 /* 00002 * Copyright (c) 2006, Technical University of Munich 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * Author: Simon Barner <barner@in.tum.de> 00032 * 00033 * @(#)$$ 00034 */ 00035 #include "contiki-raven.h" 00036 00037 #include "contiki.h" 00038 #include "usb_drv.h" 00039 #include "usb_descriptors.h" 00040 #include "usb_specific_request.h" 00041 #include <util/delay.h> 00042 #include "bootloader.h" 00043 00044 uint8_t checkForFinger(void); 00045 00046 uint8_t fingerPresent = 0; 00047 00048 /* Defining this allows you to mount the USB Stick as a mass storage device by shorting the two pins. See docs. */ 00049 //#define WINXPSP2 00050 00051 void 00052 init_lowlevel(void) 00053 { 00054 Leds_init(); 00055 Leds_off(); 00056 00057 if (checkForFinger()) { 00058 if(bootloader_is_present()) 00059 Jump_To_Bootloader(); 00060 #ifdef WINXPSP2 00061 usb_mode = mass_storage; 00062 #else 00063 fingerPresent = 1; 00064 #endif 00065 } 00066 00067 return; 00068 00069 } 00070 00071 00072 uint8_t checkForFinger(void) 00073 { 00074 uint8_t tests; 00075 uint8_t matches; 00076 00077 /* 00078 Three pads on RZUSBSTICK go: GND PD3 PD2 00079 00080 We pulse PD3, and check for that pattern on PD2. 00081 00082 A (moist) finger across those three pads should be enough 00083 to bridge these 00084 */ 00085 00086 //Output 00087 DDRD |= 1<<PD3; 00088 00089 //Input 00090 DDRD &= ~(1<<PD2); 00091 00092 00093 00094 tests = 100; 00095 matches = 0; 00096 while(tests) { 00097 00098 //Set bit PD3 to value of LSB of 'tests' 00099 PORTD = (PORTD & ~(1<<PD3)) | ( (tests & 0x01) << PD3); 00100 00101 //Allow changes to propogate 00102 _delay_us(1); 00103 00104 //Check if PD2 matches what we set PD3 to 00105 if ((PIND & (1<<PD2)) == ((tests & 0x01) << PD2)) { 00106 matches++; 00107 } 00108 00109 tests--; 00110 } 00111 00112 if (matches > 70) { 00113 return 1; 00114 } 00115 00116 return 0; 00117 }