interfaces.cpp

00001 /*******************************************************************************
00002 
00003 interfaces.cpp
00004 (c) 2010 by Sophie Dexter
00005 
00006 ********************************************************************************
00007 
00008 WARNING: Use at your own risk, sadly this software comes with no guarantees.
00009 This software is provided 'free' and in good faith, but the author does not
00010 accept liability for any damage arising from its use.
00011 
00012 *******************************************************************************/
00013 
00014 #include "interfaces.h"
00015 
00016 //Serial pc(USBTX, USBRX); // tx, rx
00017 Serial          pc(USBTX, USBRX);
00018 
00019 // A timer for timing how long things take to happen
00020 Timer timer;
00021 // A timer for checking that timeout periods aren't exceeded
00022 Timer timeout;
00023 
00024 // We use CAN on mbed pins 29(CAN_TXD) and 30(CAN_RXD).
00025 CAN can(p30, p29);
00026 // CAN_RS pin at Philips PCA82C250 can bus controller.
00027 // activate transceiver by pulling this pin to GND.
00028 // (Rise and fall slope controlled by resistor R_s)
00029 // (+5V result in tranceiver standby mode)
00030 // For further information see datasheet page 4
00031 DigitalOut can_rs_pin(p28);
00032 
00033 // Need to create this to be able to read and write files on the mbed 'disk'
00034 LocalFileSystem local("local");
00035 
00036 
00037 DigitalIn       PIN_PWR(p19);               // power supply
00038 DigitalIn       PIN_NC(p20);                // connection signal
00039 DigitalInOut    PIN_BERR(p21);              // double bus fault input - will be an input when it is working properly
00040 DigitalInOut    PIN_BKPT(p22);              // breakpoint/serial clock
00041 DigitalInOut    PIN_RESET(p23);             // reset signal
00042 DigitalInOut    PIN_DSI(p24);               // data input (to ECU) signal
00043 DigitalIn       PIN_DSO(p25);               // data output (from ECU) signal
00044 DigitalIn       PIN_FREEZE(p26);            // freeze signal
00045 //DigitalIn       PIN_DS(p27);                // data strobe signal (not used)
00046 
00047 //LEDS
00048 
00049 // Use the LEDs to if anything is happening
00050 
00051 DigitalOut      led1(LED1);                 // LED1 CAN send
00052 DigitalOut      led2(LED2);                 // LED2 CAN receive
00053 DigitalOut      led3(LED3);                 // BDM activity LED
00054 DigitalOut      led4(LED4);                 // Error LED
00055 
00056 Ticker ticker;
00057 
00058 void leds_off() {
00059     CANTXLEDOFF;
00060     CANRXLEDOFF;
00061     ACTIVITYLEDOFF;
00062 }