Dual CANbus monitor and instrumentation cluster

Eagle Schematic and Board design

/media/uploads/TickTock/canaryr5.zip

/media/uploads/TickTock/sch_r4.jpg /media/uploads/TickTock/lcdsch.jpg /media/uploads/TickTock/brd_r4.jpg

Parts List

qtyinstancepart #packagesupplierDescription
1BAT3Vhttp://www.ebay.com/itm/10x-CR2032-SMD-Battery-Holder-for-CR2032-Battery-/180938057979?pt=LH_DefaultDomain_0&hash=item2a20bfa8fbLithium 2032 coin battery holder
4C1-C4ECST1DC106R6032Tantalium capacitor 10uF
3FC1-FC3ZF1-20-01-T-WThttp://www.samtec.com/cable-systems/idc-ffc/ffc/zero-insertion.aspx20 conductor 1mm pitch flex cable connector (optional)
1FJ-20-R-08.00-4http://www.samtec.com/cable-systems/idc-ffc/ffc/zero-insertion.aspx8\" 20 conductor 1mm pitch flex connector, end reversed (optional)
2H1-H4(DON'T populate H1-H4 headers - solder mbed directly)
1H5http://www.ebay.com/itm/221186042943?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l26491x12 .1\" pitch header (optional)
1H62x6 .1\" pitch header (optional)
2IC1,IC2VP230LMDSOP8http://www.ebay.com/itm/130488665247?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649canbus transciever
1IC3LM1117-5VSOT2235V regulator
5JP*2 pin .1\" jumper header
1mbedLPC1768http://www.ebay.com/itm/200830573509?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649mbed uC
2Q1,Q22N2222SOT23General purpose NPN transistor
1R1R392M12063.9K resistor
4R2,R4-R6R102M12061K resistor
1R3R500M120650 Ohm resistor
2TR1-TR5ZJYS81R5-2PL51TG01http://www.digikey.com/product-detail/en/ZJYS81R5-2PL51T-G01/445-2223-1-ND/765232CM Choke
1Z11N5340BGC1702-15http://www.ebay.com/itm/150878122425?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l26496V, 5W Zener Diode
1X1USBhttp://www.ebay.com/itm/New-Vertical-USB-2-0-A-pcb-connector-socket-USB-A-Type-/300553895292?pt=LH_DefaultDomain_0&hash=item45fa687d7cvertical USB connector
2LCD0,LCD1TFThttp://www.mikroe.com/add-on-boards/display/tft-proto/320x240 LCD with touch screen

Assembly

1) LCD Displays

I found ribbon cable is a nice way to organize the wires to the displays. You'll need 12 conductors and I connected them in the following order:

1LED+
2LED-
3RSTB
4MOSI
5SCLK
6CSB
7X+
8X-
9Y+
10Y-
11VDD
12GND

First I connected all the GND connections (IM0, IM1, IM3, & 2 GND). Do not connect the bottom GND until you have the ribbon cable connected. After making all the ribbon cable connections (connecting the GND of the ribbon cable to the bottom GND pad), solder the GND bar from the previous step to the back of the bottom GND connection. Finally, make a connection from the back side 3.3V pin to IM2. Take a break and repeat for the second display. /media/uploads/TickTock/lcdtop.jpg /media/uploads/TickTock/lcdbot.jpg Once the two displays are complete combine all wires except CS0, CS1, X+, X-, Y+, and Y-. Connect X- of the left display to X+ of the right. Similarly connect Y- of the left display to Y+ of the right. Insulate any exposed wires.

2) PCB

Refer to the schematics to place all the components on the board. If you plan to install into the CANary 3D enclosure, DO NOT install the battery holder or the socket for the mbed and, instead, connect two wires to the VB and GND pads nearby. You will have to install the battery holder against the back wall to avoid interfering with the right-hand display and the mbed will have to be directly soldered. I have not found a socket with a low enough profile to fit in the space provided (depth of enclosure is limited by the space behind the center console). Also, I recommend keeping as much lead as possible on the Zener diode (bending it as shown to clear the back wall). Although it is operating well within parameters, the Zener gets quite hot during extended operation and the leads help dissipate the heat and keep it away from the PCB and other components.

/media/uploads/TickTock/pcbtop.jpg /media/uploads/TickTock/pcbbot.jpg

Once the PCB is populated, solder the LCDs to the PCB. CS0 connects to the right display and CS1 connects to the left. /media/uploads/TickTock/brddis.jpg

3) Testing

1)First step is to buzz out all connections from the LCDs to the pins in the main board
2)Next check the touch screen connections. On the main board, place an Ohm meter across X+ and X-. You should read 700 Ohms. Repeat for Y+ and Y-. Then test the resistance from X+ to Y+. With nothing touching the screens, it should read >100K Ohms and <1K when touching either screen.
3)When all connections are checked, solder in the mbed. Download and install the touch2 program http://mbed.org/users/TickTock/code/touch2/ to test the basic operation of the mbed and touch screens.
tips:
Touch screen is sensitive - excess flux on X+,X-,Y+,Y- connection on mbed can result in flakey operation
If touch is not working, double-check the LCD0_CS and LCD1_CS are not swapped. LCD0_CS must connect to the CS of the LCD that has X- & Y- connected to the mbed. LCD1_CS must connect to the CS of the LCD that has X+ & Y+ connected to the mbed.
4)Once touch2 works, it is time to connect to the OBD connector. I highly recommend double checking all connections from the OBD to the PCB with the cable in place before connecting to the Leaf. Buzz out all the pins in the OBS to make sure none are shorting to each other, Check that the 12V goes to the Zener (and nothing else) and the switched 12V to the resistor divider (and nothing else). Test the ground connection properly connects to ground and nothing else.
5)Once you are confident there are no shorts or wrong connections from the OBD connector, take a deep breath and plug it into your leaf. Touch2 program should come up and function. Unplug and install the latest CANary firmware. Test all features before installing into the enclosure (gids, cellpair, menu system, logging) since installing and removing from the enclosure is a PITA.

/media/uploads/TickTock/pcbdone.jpg /media/uploads/TickTock/functioning.jpg

4) Enclosure

The 3D printer leaves a lot of powder behind - I used a strong spray of water to get it out of all the cracks. The enclosure comes with a rather rough finish. I recommend convincing yourself you like it, then simply lightly sand then paint before assembly. Sanding is very difficult - the nylon is very nicely fused and doesn't want to sand. I tried sandblasting and that didn't work either. I had some limited success with filler and then sanding, but only on the outside - it is too difficult to sand the face.

5) Final Assembly

utility.cpp

Committer:
TickTock
Date:
2013-05-03
Revision:
96:a6c6a6fd1d28
Parent:
95:248b3c25a7df

File content as of revision 96:a6c6a6fd1d28:

// 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
    tick=true;
    // will use this to generate a logTP() just before the next Message received.
    if( (time(NULL) % 60) == 0) ZeroSecTick = true; // gg - at 0-second of each minute
}

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

void touch_ISR(){
    //LPC_GPIOINT->IO2IntClr = (LPC_GPIOINT->IO2IntStatR | LPC_GPIOINT->IO2IntStatF); // seems to work without so maybe not necessary (performed inInterruptIn handler?)
    touched=true; // just set flag - touch screen algorythm is long and we don't want to block other interrupts
}

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) {

   // re-arranged to put static first
    static unsigned char ii = 0;
    static unsigned char lasti = 0; // indexindex
    static unsigned char bdi=0;
    static signed short imotorRPM = 0;
    static unsigned short nLost = 0; // gg - overrun
 
    char sTemp[40];    
    unsigned char changed;
    unsigned short i; // was unsigned char
    signed short packV;
    signed short packA;
    signed long imWs_x4;
    unsigned short ts;

    secsNoMsg=0; // reset deadman switch
    if(debugMode||(skin==ggSkin)){ 
        // code to insert actual number of dropped frames for overrun debug - skiped in normal mode to keep logcan short
        if(logOpen){
            if(canRXmsg.id>0) {
                // check to see if buffer is already full (read - write) = 1
                // actually the last buffer location cannot be used because then 
                //   the buffer would look empty after writePointer++
                
                //if (((writePointer+maxBufLen-readPointer)%maxBufLen)>(maxBufLen/16)) // modulo is slow?
     
                // pointers are 0 through maxBufLen-1
                if( (readPointer - writePointer) == 1 || (writePointer - readPointer) == (maxBufLen - 1)) {
                    // the buffer is "full", so Lose this message
                    
                    // point to the last-stored message
                    int tempWritePointer = writePointer - 1 ;
                    if( tempWritePointer < 0 ) tempWritePointer = maxBufLen - 1;
                    char strLost[9] ;
     
                    if( nLost == 0 ) {
                        // this is the first message lost 
                        //   and we must overwrite the last message with an FFE comment message
                        // So, there will be two messages lost as the comment message is laid in.
                        nLost = 2;
                        sprintf(strLost,"%s","Lost0002"); // indicate two messages lost
                        
                        // overlay the last message with a "Lost0002" comment
                        writeBuffer[tempWritePointer][0]=0;
                        // leave the ts of the overlaid message
                        //writeBuffer[tempWritePointer][1]=(ts&0xff00)>>8; // Time Stamp (2 bytes_
                        //writeBuffer[tempWritePointer][2]=(ts&0x00ff);
                        // force the MsgID to an Event Message 
                        writeBuffer[tempWritePointer][3]=0xfe; // MsgID, low byte
                        writeBuffer[tempWritePointer][4]=0xff; // Len nibble, and MsgID high nibble
                        // lay in the "Lost0002" text
                        for(i=5;i<13;i++){ 
                            writeBuffer[tempWritePointer][i]= strLost[i-5];
                        }
                    } else {
                        // at least one message was previously lost
                        // increment the loat counter
                        nLost += 1;
                        
                        // lay the new count into the comment
                        sprintf(strLost,"%04d",nLost);
                        for(i=9;i<13;i++){ 
                            writeBuffer[tempWritePointer][i]= strLost[i-9];
                        }
                    }
                } else {
                    // there is room to insert the message
                    // get it inserted quickly
                    ts=getTimeStamp(); 
                    writeBuffer[writePointer][0]=mType;
                    writeBuffer[writePointer][1]=(ts&0xff00)>>8; // Time Stamp (2 bytes_
                    writeBuffer[writePointer][2]=(ts&0x00ff);
                    writeBuffer[writePointer][3]=canRXmsg.id&0xff; // MsgID, low byte
                    char sLen = canRXmsg.len ;
                    writeBuffer[writePointer][4]=(canRXmsg.id>>8)+(sLen<<4); // Len nibble, and MsgID high nibble
                    for(i=0;i<8;i++){ // Is there a better way to do this? (writeBuffer[writePointer][i]=canRXmsg.data?)
                        if(i<sLen) 
                            writeBuffer[writePointer][i+5]=canRXmsg.data[i];
                        else // i>=sLen
                            // force unused data bytes to FF for CAN-Do compatibility
                            writeBuffer[writePointer][i+5]=0xFF;
                    }
                    
                    //--------------
                    // Note, this is not protected from the interrupt.
                    // Due to the nLost code above, this no longer
                    //    overflows to writePointer = readPointer
                    //    which would make the buffer look empty
                    if (++writePointer >= maxBufLen) {
                        writePointer = 0;
                        led3 = !led3;
                    }
                    //--------------
                    // log a local message if we had lost messages. gg - logcan
                    if( nLost > 0 ) {
                        // We previously lost messages that did not get into the buffer
                        sprintf(sTemp,"-- Lost %d Messages.\n", nLost);
                        printMsg(sTemp); // write buffer overrun
                        //spkr.beep(500,0.25);
                        
                        nLost = 0 ;
                    }
                    //--------------
                }
            }
        }
    }else{ // not debugMode - keep code short
        if(logOpen){
            NVIC_DisableIRQ(CAN_IRQn);  // Block interrupts until write pointer assigned
            int localWritePointer = writePointer++; // create local copy to make logCan reentrant
            // note that the static variables do not prevent safe reentry
            // since they are only used for msgId<0x800 which will never interrupt
            // another msgId<0x800 (both CANbusses are same priority)
            if (writePointer >= maxBufLen) {
                writePointer = 0;
                led3 = !led3;
            }
            NVIC_EnableIRQ(CAN_IRQn);  // Unblock interrupts once local pointer set and global pointer incremented
            ts=getTimeStamp();
            writeBuffer[localWritePointer][0]=mType;
            writeBuffer[localWritePointer][1]=(ts&0xff00)>>8;
            writeBuffer[localWritePointer][2]=(ts&0x00ff);
            writeBuffer[localWritePointer][3]=canRXmsg.id&0xff;
            writeBuffer[localWritePointer][4]=(canRXmsg.id>>8)+(canRXmsg.len<<4);
            for(i=5;i<13;i++){ // Is there a better way to do this? (writeBuffer[localWritePointer][5]=canRXmsg.data?)
                writeBuffer[localWritePointer][i]=canRXmsg.data[i-5];
            }
            if (writePointer==readPointer) {
                // Just caught up to read pointer
                sprintf(sTemp,"Write buffer overrun.\n");
                printMsg(sTemp); // write buffer overrun
                spkr.beep(500,0.25);
            }
        }
    }

    if(canRXmsg.id<0x800){ // Block FFE and FFF messages
        if(indexLastMsg[canRXmsg.id]==0) { //Check if no entry
            //ii=ii<99?ii+1:0; // Should never wrap - less than 100 different messages ever used
            if(ii<99) {
                //indexLastMsg[canRXmsg.id]=ii; //Create entry if first message
                indexLastMsg[canRXmsg.id]=++ii; //Create entry for first MsgID occurance
                // ii max is 99 here
            } else {
                // the ii array is full, more than 100 MsgIDs found
                if(ii==99) {
                    ii++; // step to 100 to log only one error
                    sprintf(sTemp,"MsgID buffer overrun.\n");
                    printMsg(sTemp); // write buffer overrun
                }
            }
        }
        
        //----------------
        if(dMode[0]==changedScreen||dMode[1]==changedScreen){// Skip if not using (for execution speed)
            changed=msgChanged[indexLastMsg[canRXmsg.id]];
            // This is cleared in the main loop when reset button is touched
            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
        
        //-------------------
        //Miscellaneous on-recieve operations below
        if((mType==1)&&(canRXmsg.id==0x7bb)){ // is battery data?  Need to store all responses
            if(canRXmsg.data[0]<0x20){
                if(canRXmsg.data[3]==2){//Group 2 = cellpair data
                    bdi=BatDataBaseG2; // index offset for CP data (uses 00 - 1C)
                    sprintf(sTemp,"  Getting cell pair data\n");
                    printMsg(sTemp);
                    
                }else if(canRXmsg.data[3]==4){//Group 4 = temperature data
                    bdi=BatDataBaseG4; // index offset for Temperature data (uses 20 - 22)
                    sprintf(sTemp,"  Getting temperature data\n");
                    printMsg(sTemp);
                    
                }else if(canRXmsg.data[3]==1){//Group 1 data
                    bdi=BatDataBaseG1; // index offset for Group 1 data (uses 20 - 22)
                    sprintf(sTemp,"  Getting Group 1 data\n");
                    printMsg(sTemp);
                    
                }else if(canRXmsg.data[3]==3){//Group 3 data
                    bdi=BatDataBaseG3; // index offset for Group 3 data (uses 20 - 22)
                    sprintf(sTemp,"  Getting Group 3 data\n");
                    printMsg(sTemp);
                    
                }else if(canRXmsg.data[3]==5){//Group 5 data
                    bdi=BatDataBaseG5; // index offset for Group 5 data (uses 20 - 22)
                    sprintf(sTemp,"  Getting Group 5 data\n");
                    printMsg(sTemp);
                    
                }else bdi=0xff; // ignore other messages (for now)
                lasti=0;
            }
            
            if(bdi<0xff){
                i=canRXmsg.data[0]&0x0f; //lower nibble of D0 is index
                if(lasti>i){ //detect rollover and offset index appropriately
                    bdi=BatDataBaseG2 + 0x10; // only for CP data
                }
                lasti=i; //remember the msb to detect rollover next time around
                i+=bdi;
                //-------
                if(i==BatDataBaseG4+2){ // Last of Temperature data
                    logCP=yesBattLog; // Only log if logging enabled
                    showCP=true; // Always show
                    battTemp_x4=battData[224+5]+battData[224+8]+battData[224+11]+battData[224+14];
                }
                //-------
                i*=7;
                //if(i<0xfa){ // Is there a better way to do this?
                if(i+6 < BatDataBufMax) {
                    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];
                }
            }
        }else if((mType==1)&&(canRXmsg.id==0x1db)){ //Battery Volts and Amps
            packV=((canRXmsg.data[2]<<2)|(canRXmsg.data[3]>>6)); // 1 LSB = 0.5V
            packA=((canRXmsg.data[0]<<3)|(canRXmsg.data[1]>>5)); // 1 LSB = 0.5A
            if(packA>0x03ff){
                packA|=0xf800;//extend sign;
            }
            packA -= 1; //Slight correction to value required (unique to my Leaf?)
            imWs_x4 = packV; // Volts*milliSeconds*2
            imWs_x4 *= -packA; // milliWattseconds*4
            if (!((imotorRPM<2)&&(imWs_x4<0))){ //Ignore if charging from wall
                mWs_x4 += imWs_x4; // total mWs_x4
                numWsamples++;
            }
        }else if((mType==1)&&(canRXmsg.id==0x1da)){ //Motor Speed
            imotorRPM=((canRXmsg.data[4]<<8)|(canRXmsg.data[5]));
            if(imotorRPM<0){ // take absolute value
                imotorRPM=-imotorRPM;
            }
            motorRPM+=imotorRPM;
            numSsamples++;
        }
    }
}

//-----------------------------
void logTS () {
    CANMessage tsMsg;
    unsigned long secs = time(NULL); // seconds past 12:00:00 AM 1 Jan 1900
    // NOTE: In Mbed, I believe that this is seconds past start of 1970, not 1900
    //   but this is good, since seconds past 1970 is what CAN-Do expects. GG - Date Time
    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)&0xff;
    tsMsg.data[4]=0; // 0xff; gg - Date Time
    tsMsg.data[5]=0; // 0xff; for CAN-Do
    tsMsg.data[6]=0; // 0xff;
    tsMsg.data[7]=0xff;
    logCan(0,tsMsg); // Date-Time
}

void logEvent (char * errMsg) {
    // log CAN-Do 8-character Pseudo Message
    CANMessage tsMsg;
    tsMsg.id=0xffe; // pseudo Message to CAN-Do log
    tsMsg.len=0xf;
    int iMsgLen = strlen(errMsg);
    // 8 character message compatible with CAN-Do
    for(int i=0; i<8; i++){
      tsMsg.data[i]=' '; 
      if( i < iMsgLen ) tsMsg.data[i]=errMsg[i];
    }
    logCan(0,tsMsg); // FFE Comment Message
}

void sendReq() {
    static char data[8] = {0x02, 0x21, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff};
    if(reqMsgCnt<99){
        switch (reqMsgCnt){
            case 0:
                can1.monitor(false); // set to active mode
                can1SleepMode = 0; // enable TX
                data[0]=0x02; //change to request group 1
                data[1]=0x21;
                data[2]=0x01;
                break;
            case 6: // group 1 has 6 frames
                can1.monitor(false); // set to active mode
                can1SleepMode = 0; // enable TX
                data[0]=0x02; //change to request group 2 (cp data)
                data[1]=0x21;
                data[2]=0x02;
                break;
            case 35: // group 2 has 29 frames
                data[0]=0x02; //change to request group 3
                data[1]=0x21;
                data[2]=0x03;
                break;
            case 40: // group 3 has 5 frames
                data[0]=0x02; //change to request group 4 (temperature)
                data[1]=0x21;
                data[2]=0x04;
                break;
            case 43: // group 4 has 3 frames
                data[0]=0x02; //change to request group 5
                data[1]=0x21;
                data[2]=0x05;
                break;
            case 54: // group 5 has 11 frames
                reqMsgCnt = 99;
                can1SleepMode = 1; // disable TX
                can1.monitor(true); // set to snoop mode
                msgReq.detach(); // stop ticker
            default:
                data[0]=0x30; //change to request next line message
                data[1]=0x01;
                data[2]=0x00;
        }
        can1.write(CANMessage(0x79b, data, 8));
        reqMsgCnt++;
    }
}

void autoPollISR(){
    char sTemp[40]; // just for debug
    sprintf(sTemp,"Requesting cp data\n"); // just for debug
    printMsg(sTemp); // just for debug
    reqMsgCnt = 0; //reset message counter
    msgReq.attach(&sendReq,0.015);
}

void playbackISR() { //Used for autoplayback
    step=true;
}

void doNothing(){ //CAN deattach work-around
}

void recieve1() {
    CANMessage msg1;
    can1.read(msg1);
    
    if( ZeroSecTick ) { ZeroSecTick = false; logTS(); } // gg - 0-second EV bus
    
    logCan(1, msg1); // EVcan Message Received
    led1 = !led1;
}

void recieve2() {
    CANMessage msg2;
    can2.read(msg2);
    
    if( ZeroSecTick ) { ZeroSecTick = false; logTS(); } // gg - 0-second EV bus
    
    logCan(2, msg2); // CARcan Message Received
    led2 = !led2;
}

unsigned char buttonX(unsigned short X, unsigned char columns) {
    unsigned char val = X*columns/320;
    return val;
}

unsigned char buttonY(unsigned short Y, unsigned char rows) {
    unsigned short val = Y*rows/240;
    return val;
}

void saveConfig(){
    FILE *cfile;
    cfile = fopen("/local/config.txt", "w");
    //fprintf(cfile,"format 3\r\n");
    fprintf(cfile,"format 4\r\n");
    fprintf(cfile,"x0_off %d\r\n",tt.x0_off);
    fprintf(cfile,"y0_off %d\r\n",tt.y0_off);
    fprintf(cfile,"x0_pp %d\r\n",tt.x0_pp);
    fprintf(cfile,"y0_pp %d\r\n",tt.y0_pp);
    fprintf(cfile,"x1_off %d\r\n",tt.x1_off);
    fprintf(cfile,"y1_off %d\r\n",tt.y1_off);
    fprintf(cfile,"x1_pp %d\r\n",tt.x1_pp);
    fprintf(cfile,"y1_pp %d\r\n",tt.y1_pp);
    fprintf(cfile,"x_mid %d\r\n",tt.x_mid);
    if (dMode[0]==config1Screen)
        fprintf(cfile,"dMode0 %d\r\n",mainScreen);
    else
        fprintf(cfile,"dMode0 %d\r\n",dMode[0]);
    if (dMode[1]==config1Screen)
        fprintf(cfile,"dMode1 %d\r\n",mainScreen);
    else
        fprintf(cfile,"dMode1 %d\r\n",dMode[1]);
    fprintf(cfile,"ledHi %4.3f\r\n",ledHi);
    fprintf(cfile,"ledLo %4.3f\r\n",ledLo);
    fprintf(cfile,"pollInt %d\r\n",pollInt);
    fprintf(cfile,"scale12V %4.2f\r\n",scale12V);
    fprintf(cfile,"skin %d\r\n",skin);
    fprintf(cfile,"dtePeriod %d\r\n",dtePeriod);
    fprintf(cfile,"DebugMode %d\r\n",(debugMode?1:0));
    fclose(cfile);
}

 void readConfig(){
    FILE *cfile;
    int ff;
    char sTemp[40];
    cfile = fopen("/local/config.txt", "r");
    if (cfile==NULL){ // if doesn't exist --> create
        sprintf(sTemp,"No config file found.\n");
        printMsg(sTemp); // no config file
        sprintf(sTemp,"Calibrating touch screen.\n");
        printMsg(sTemp); // calibrating
        //tt.setcal(5570, 34030, 80, 108, 33700, 5780, 82, 108, 32500);// bypass calibration using my values
        tt.calibrate();   // run touchscreen calibration routine
        // NOTE: calibrates screen 1 first, then screen 0.
        saveConfig();
    } else {
        ledHi = 0.823;
        ledLo = 0.1;
        pollInt = 300;
        scale12V = 16.2;
        skin = ttSkin;
        fscanf(cfile, "format %d\r\n", &ff ) ;
        fscanf(cfile, "x0_off %d\r\n", &tt.x0_off ) ;
        fscanf(cfile, "y0_off %d\r\n", &tt.y0_off ) ;
        fscanf(cfile, "x0_pp %d\r\n", &tt.x0_pp ) ;
        fscanf(cfile, "y0_pp %d\r\n", &tt.y0_pp ) ;
        fscanf(cfile, "x1_off %d\r\n", &tt.x1_off ) ;
        fscanf(cfile, "y1_off %d\r\n", &tt.y1_off ) ;
        fscanf(cfile, "x1_pp %d\r\n", &tt.x1_pp ) ;
        fscanf(cfile, "y1_pp %d\r\n", &tt.y1_pp ) ;
        fscanf(cfile, "x_mid %d\r\n", &tt.x_mid ) ;
        fscanf(cfile, "dMode0 %d\r\n", &dMode[0] ) ;
        fscanf(cfile, "dMode1 %d\r\n", &dMode[1] ) ;
        if(ff>1){
            fscanf(cfile, "ledHi %f\r\n", &ledHi ) ;
            fscanf(cfile, "ledLo %f\r\n", &ledLo ) ;
            fscanf(cfile, "pollInt %d\r\n", &pollInt ) ;
            fscanf(cfile, "scale12V %f\r\n", &scale12V ) ;
        }
        if(ff>2){
            fscanf(cfile, "skin %d\r\n", &skin ) ;
            fscanf(cfile, "dtePeriod %d\r\n", &dtePeriod ) ;
        }
        if(ff>3){
            int iDebug ;
            fscanf(cfile, "DebugMode %d\r\n", &iDebug ) ;
            debugMode = (iDebug==1)?true:false ;
        }
        fclose(cfile);
        
        //if(ff<3){//If not latest format, save as latest format
        if(ff<4){//If not latest format, save as latest format
            saveConfig();
            sprintf(sTemp,"Config file format updated.\n");
            printMsg(sTemp); // config forat updates
        }
        sprintf(sTemp,"Config file loaded.\n");
        printMsg(sTemp); // config file loaded
    }
}

void upDate(unsigned char field, bool upDownBar){
    struct tm t; // pointer to a static tm structure
    time_t seconds ;
    seconds = time(NULL);
    t = *localtime(&seconds) ;
    switch(field){
        case 0: // year
            if (upDownBar) {
                t.tm_year = t.tm_year+1;
            } else {
                t.tm_year = t.tm_year-1;
            }
            break;
        case 1: // month
            if (upDownBar) {
                t.tm_mon = (t.tm_mon<12)?t.tm_mon+1:1;
            } else {
                t.tm_mon = (t.tm_mon>2)?t.tm_mon-1:12;
            }
            break;
        case 2: // day
            if (upDownBar) {
                t.tm_mday = (t.tm_mday<31)?t.tm_mday+1:1;
            } else {
                t.tm_mday = (t.tm_mday>2)?t.tm_mday-1:31;
            }
            break;
        case 3: // hour
            if (upDownBar) {
                t.tm_hour = (t.tm_hour<23)?t.tm_hour+1:0;
            } else {
                t.tm_hour = (t.tm_hour>1)?t.tm_hour-1:23;
            }
            break;
        case 4: // minute
            if (upDownBar) {
                t.tm_min = (t.tm_min<59)?t.tm_min+1:0;
            } else {
                t.tm_min = (t.tm_min>1)?t.tm_min-1:59;
            }
            break;
        case 5: // second
            if (upDownBar) {
                t.tm_sec = (t.tm_sec<59)?t.tm_sec+1:0;
            } else {
                t.tm_sec = (t.tm_sec>1)?t.tm_sec-1:59;
            }
            break;
        default:
            break;
    }
    set_time(mktime(&t));
}

void logPackVoltages() { // Turbo3 - routine to dump CP values to text file
    char sTemp[40];
    struct tm t; // pointer to a static tm structure
    short unsigned max, min, jv, i, bd;
    unsigned avg;
    unsigned short gids, SOC, packV;
    signed short packA;
    time_t seconds ;
    
    CANMessage msg;
    
    seconds = time(NULL); // Turbo3
    t = *localtime(&seconds) ; // Turbo3 
    
    msg = lastMsg[indexLastMsg[0x5bc]]; //Get gids
    gids = (msg.data[0]<<2)+(msg.data[1]>>6);
    msg = lastMsg[indexLastMsg[0x55b]]; //Get SOC
    SOC = (msg.data[0]<<2)+(msg.data[1]>>6);
    msg = lastMsg[indexLastMsg[0x1db]]; //Get pack volts
    packV = (msg.data[2]<<2)+(msg.data[3]>>6);
    packA = (msg.data[0]<<3)+(msg.data[1]>>5);
    if (packA & 0x400) packA |= 0xf800;
    
    max=0;
    min=9999;
    avg=0;
    for(i=0; i<96; i++) {
        bd=(battData[i*2+3]<<8)+battData[i*2+4];
        avg+=bd;
        if(bd>max) max=bd;
        if(bd<min) min=bd;
    }
    avg /= 96;
    if(min<3713) {
        jv=avg-(max-avg)*1.5;
    } else { // Only compute judgement value if min cellpair meets <= 3712mV requirement
        jv=0;
    }
    
    FILE *bfile;
    //bfile = fopen("/local/batvolt.txt", "a");
    bfile = fopen("/usb/batvolt.txt", "a");
    if(bfile!=NULL) {
        strftime(sTemp, 40, "%a %m/%d/%Y %X", &t);
        fprintf(bfile,"%s,%d,%5.1f%%,%5.1f,%5.1f,%d,%d,%d,%d,%d",sTemp,gids,(float)SOC/10,(float)packV/2,(float)packA/2,max,min,avg,max-min,jv);
        // BatDataBaseG4 * 7 = 224        
        fprintf(bfile,"%d,%d,%d,%d,",(battData[224+ 3]<<8)+battData[224+ 4],battData[224+ 5],(battData[224+ 6]<<8)+battData[224+ 7],battData[224+ 8]);
        fprintf(bfile,"%d,%d,%d,%d", (battData[224+ 9]<<8)+battData[224+10],battData[224+11],(battData[224+12]<<8)+battData[224+13],battData[224+14]);
        for(i=0; i<96; i++) {
            bd=(battData[i*2+3]<<8)+battData[i*2+4];
            fprintf(bfile,",%d",bd);
        }
        fprintf(bfile,"\r\n");
        fclose(bfile);
    }
    logCP=false;
    showCP=true;
}