File content as of revision 20:3bf176d14b14:

// utility.cpp

#include "utility.h"

void mbed_reset();
void RTC_IRQHandler() {
    timer.reset(); // zero ms at the-seconds-tic
    canIdle=(++secsNoMsg>canTimeout)?true:false;
    userIdle=(++secsNoTouch>userTimeout)?true:false;
    LPC_RTC->ILR |= (1<<0); // clear interrupt to prepare for next
}

extern "C" void RTC_Init (void) {
    LPC_RTC->ILR=0x00; // set up the RTC interrupts
    LPC_RTC->CIIR=0x01; // interrupts each second
    LPC_RTC->CCR = 0x01;  // Clock enable
    //NVIC_SetPriority( RTC_IRQn, 10 );
    NVIC_EnableIRQ( RTC_IRQn );
}

void logMsg (char *msg) {
    strcpy(displayLog[displayLoc],msg);
    displayLoc=displayLoc>17?0:displayLoc+1;
}

void touch_ISR(){
    LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF);
    secsNoTouch = 0;
    touched=true;
}

unsigned short getTimeStamp() {
    unsigned short msec = timer.read_ms() ; // read ms from the timer
    unsigned long secs = time(NULL); // seconds past 12:00:00 AM 1 Jan 1900
    unsigned short isecs = secs%60 ; // modulo 60 for 0-59 seconds from RTC
    return ((isecs<<10)+msec) ; // return the two byte time stamp
}

void logCan (char mType, CANMessage canRXmsg) {
    char sTemp[40];
    unsigned short ts = getTimeStamp();
    unsigned long secs = time(NULL); // seconds past 12:00:00 AM 1 Jan 1900
    static unsigned char ii = 0, lasti = 0; // indexindex
    unsigned char changed,i;
    static unsigned char bdi;
    if(logOpen){
        if(canRXmsg.id>0) {
            writeBuffer[writePointer][0]=mType;
            writeBuffer[writePointer][1]=((secs%60)<<2)+((ts&0x300)>>8);
            writeBuffer[writePointer][2]=ts&0xff;
            writeBuffer[writePointer][3]=canRXmsg.id&0xff;
            writeBuffer[writePointer][4]=(canRXmsg.id>>8)+(canRXmsg.len<<4);
            for(i=5;i<13;i++){
                writeBuffer[writePointer][i]=canRXmsg.data[i-5];
            }
            if (++writePointer >= maxBufLen) {
                writePointer = 0;
                led3 = !led3;
            }
        }
    }//if logOpen
    if(indexLastMsg[canRXmsg.id]==0) { //Check if no entry
        ii=ii<99?ii+1:0;
        indexLastMsg[canRXmsg.id]=ii; //Create entry if first message
    }
    if(dMode[0]==changedScreen||dMode[1]==changedScreen){
        changed=msgChanged[indexLastMsg[canRXmsg.id]];
        for(i=0;i<8;i++){
            if(lastMsg[indexLastMsg[canRXmsg.id]].data[i]!=canRXmsg.data[i]){
                changed |= 1<<i;
            }
        }
        msgChanged[indexLastMsg[canRXmsg.id]]=changed;
    }
    lastMsg[indexLastMsg[canRXmsg.id]]=canRXmsg; //Store in table
    if(mType==1&&canRXmsg.id==0x7bb){ // is battery data?  Need to store all responses
        if(canRXmsg.data[0]<0x20){
            if(canRXmsg.data[3]==2){//cellpair data
                bdi=0;
                sprintf(sTemp,"Getting cell pair data\n");
                logMsg(sTemp);
           }else if(canRXmsg.data[3]==4){//temperature data
                bdi=0x20;
                sprintf(sTemp,"Getting temperature data\n");
                logMsg(sTemp);
            }else bdi=0;
            lasti=0;
        }
        i=canRXmsg.data[0]&0x0f; //lower nibble of D0 is index
        if(lasti>i){ //detect rolloever and offset index appropriately
            bdi=0x10;
        }
        lasti=i; //remember the msb to detect rollover next time around
        i+=bdi;
        i*=7;
        if(i<0xfa){
            battData[i+0]=canRXmsg.data[1];
            battData[i+1]=canRXmsg.data[2];
            battData[i+2]=canRXmsg.data[3];
            battData[i+3]=canRXmsg.data[4];
            battData[i+4]=canRXmsg.data[5];
            battData[i+5]=canRXmsg.data[6];
            battData[i+6]=canRXmsg.data[7];
        }
    }//if 0x7bb
}

void logTS () {
    CANMessage tsMsg;
    unsigned long secs = time(NULL); // seconds past 12:00:00 AM 1 Jan 1900
    tsMsg.id=0xfff;
    tsMsg.len=0xf;
    tsMsg.data[0]=secs&0xff;
    tsMsg.data[1]=(secs>>8)&0xff;
    tsMsg.data[2]=(secs>>16)&0xff;
    tsMsg.data[3]=secs>>24;
    tsMsg.data[4]=0xff;
    tsMsg.data[5]=0xff;
    tsMsg.data[6]=0xff;
    tsMsg.data[7]=0xff;
    logCan(0,tsMsg);
}

void sendCPreq() {
    char i;
    char data[8] = {0x02, 0x21, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff};
    can1.monitor(false); // set to active mode
    can1SleepMode = 0; // enable TX
    can1.write(CANMessage(0x79b, data, 8));
    data[0]=0x30; //change to request next line message
    data[1]=0x01;
    data[2]=0x00;
    for(i=0;i<27;i++){
        wait_ms(16); //wait 16ms
        can1.write(CANMessage(0x79b, data, 8));
    }
    can1SleepMode = 1; // disable TX
    can1.monitor(true); // set to snoop mode
}

void sendTreq() {
    char i;
    char data[8] = {0x02, 0x21, 0x04, 0xff, 0xff, 0xff, 0xff, 0xff};
    can1.monitor(false); // set to active mode
    can1SleepMode = 0; // enable TX
    can1.write(CANMessage(0x79b, data, 8));
    data[0]=0x30; //change to request next line message
    data[1]=0x01;
    data[2]=0x00;
    for(i=0;i<2;i++){
        wait_ms(16); //wait 16ms
        can1.write(CANMessage(0x79b, data, 8));
    }
    can1SleepMode = 1; // disable TX
    can1.monitor(true); // set to snoop mode
}

void tickerISR() {  //This is the ticker ISR for auto-polling
    pollCP=true;    //Set a flag to do in main loop instead of here
}                   //since ticker blocks other interrupts

void recieve1() {
    CANMessage msg1;
    secsNoMsg=0; // reset deadman switch
    can1.read(msg1);
    logCan(1, msg1);
    led1 = !led1;
}

void recieve2() {
    CANMessage msg2;
    secsNoMsg=0; // reset deadman switch
    can2.read(msg2);
    logCan(2, msg2);
    led2 = !led2;
}