File content as of revision 7:a9150dc1e481:

//This program was created by Ken 8th June 2022 to test the CAN output of a CAN Gateway.
#define kMajorVersion 0 //Defines a major and minor version to be shown later in the program.
#define kMinorVersion 5

#include "mbed.h" //Including mbed libraries. This should be all it needs to use the Mbed and CAN.
#include <string> //This is needed to make text strings work
#include <stdio.h>
#include <ctype.h> //For 'is digit' condition
#include <sstream> //This is used to convert an integer to hex
#include <time.h> //To measure how long a process took? Includes clock_t and CLOCKS_PER_SEC
//#include <list> //To let me make lists of CAN IDs

RawSerial pc(USBTX, USBRX); // USB UART Terminal, tx, rx. Is needed for 'pc.printf' functions to work.

// NOTE: Original pins for CAN Bus 1 are 9 and 10.
CAN CanBus(p9, p10); //CANBus to use pins 9 and 10. This defines CanBus so other 'CanBus' lines will work.
CAN CanBus2(p30, p29); //CANBus2 for recieving to use pins 30 and 29 (in that order!).
CANMessage messageIn;

//Define a CAN message to send
CANMessage messageOut1;

//Set messageOutText to a default message so it's defined.
string messageOutText = "";
string messageOutTextWithSpaces = "";
string part = "";
int partincrement = 0;
__int64 incrementer = 0;
int CANCount = 0;
int spamon = 0;
int idspamon = 0;
int spamcount = 0;
int totalspamsever = 0;
int spamstarttime = 0;
int spamendtime = 0;
int vlistincrementer = 0;
int idlistincrementer = 0;
string spampreamble = "333";
int expected1 = 0;
int expected2 = 0;
unsigned char expected3 = 0;
unsigned char expected4 = 0;
unsigned char expected5 = 0;
unsigned char expected6 = 0;
unsigned char expected7 = 0;
unsigned char expected8 = 0;
unsigned char expected9 = 0;
unsigned char expected10 = 0;
int failsthistest = 0;
int addnewlinetonextmessage = 0;

//A function to clear all test-related variables
void resettest(void)
    {
    pc.printf("Resetting test.\r\n");
    failsthistest = 0;
    }

//A function to add a carriage return in the output if the system has been writing out the CAN messages it sends.
void addnewlineifneeded(void)
{
    if (addnewlinetonextmessage == 1)
        {
        pc.printf("\r\n");
        addnewlinetonextmessage = 0;
        }
}

    
//A function to end a test and report on findings.
void endtest()
    {
    if (failsthistest == 0)
        {
        pc.printf("\033[1;32mTest complete. %d failures found.\033[0m\r\n", failsthistest);
        }
    if (failsthistest > 0)
        {
        pc.printf("\033[1;31mTest complete. %d failures found.\033[0m\r\n", failsthistest);
        }
    addnewlineifneeded();
    pc.printf("-------------------------------------\r\n");
    failsthistest = 0;
    }

//A generic 'send CAN' function to send CAN with a standard message
void sendCAN(void)
{
    CanBus.write(messageOut1);
    //addnewlineifneeded();
    pc.printf("\033[1;33m%s\033[0m\r", messageOutTextWithSpaces);
    //addnewlinetonextmessage = 1;
}

//A function to deal with each CAN message part (e.g.: 301, 8, 01, 02...)
void dealwithpart(void)
{
    int hextotal = 0;
    partincrement = partincrement + 1;
    //pc.printf("Dealing with part %d. (%s)\r\n", partincrement, part);
    //int partincrementb = 0;
    int textlength = part.length();
    //int characterinc = 0;
    //pc.printf("That's %d characters long.\r\n", textlength);
    for (int i = 0; i < part.size(); i++)
    {
        //pc.printf("Examining character %d/%d.\r\n", (i+1), textlength);
        char individualcharacter = part.at(i);
        //pc.printf("That's '%c'.\r\n", individualcharacter);
        int numberized = 0;
        if(isdigit(individualcharacter))
            {
            //pc.printf("That character is a digit.\r\n");
            numberized = individualcharacter - '0';
            //pc.printf("Numberized that's '%d'.\r\n", numberized);
            }
        else
            {
            //pc.printf("That character is NOT a digit.\r\n");
            int asciivalue = toupper(individualcharacter);
            //pc.printf("Ascii value is %d.\r\n", asciivalue);
            numberized = asciivalue - 55;
            //pc.printf("Hex value is %d.\r\n", numberized);
            }
        //pc.printf("Eventual numberization is %d.\r\n", numberized);
        //pc.printf("Hex total is now %d.\r\n", hextotal);
        int powertoraise = part.size() - (i+1);
        //pc.printf("Must multiply by 16 to the power of %d.\r\n", powertoraise);
        int amounttoadd = numberized;
        //pc.printf("powertoraise is '%d'.\r\n", powertoraise);
        if (powertoraise == 1)
            {
            amounttoadd = numberized * 16;
            //pc.printf("Multiplying by 16.\r\n");
            //pc.printf("powertoraise is '%d'.\r\n", powertoraise);
            }
        if (powertoraise == 2)
            {
            amounttoadd = numberized * 256;
            //pc.printf("Multiplying by 256.\r\n");
            }
        //pc.printf("Amount to add is therefore %d.\r\n", amounttoadd);
        hextotal = hextotal + amounttoadd;
        //pc.printf("hextotal so far for this part is therefore %d.\r\n", hextotal);
    }
    //pc.printf("hextotal for whole part is therefore %d.\r\n", hextotal);
    //pc.printf("Need to convert that into true hex.\r\n");
    std::stringstream sstream;
    sstream << std::hex << hextotal;
    //pc.printf("StringSteam says '%s'.\r\n", sstream.str());
    if (partincrement == 1)
        {
        messageOut1.id = hextotal;
        expected1 = hextotal;
        }
    if (partincrement == 2)
        {
        messageOut1.len = hextotal;
        expected2 = hextotal;
        }
    if (partincrement >= 3)
        {
        messageOut1.data[partincrement-3] = hextotal;
        }
    if (partincrement == 3)
        {
        expected3 = hextotal;
        }
    if (partincrement == 4)
        {
        expected4 = hextotal;
        }
    if (partincrement == 5)
        {
        expected5 = hextotal;
        }
    if (partincrement == 6)
        {
        expected6 = hextotal;
        }
    if (partincrement == 7)
        {
        expected7 = hextotal;
        }    
    if (partincrement == 8)
        {
        expected8 = hextotal;
        }
    if (partincrement == 9)
        {
        expected9 = hextotal;
        }
    if (partincrement == 10)
        {
        expected10 = hextotal;
        }
    //pc.printf("Part %d complete.\r\n", partincrement);
    //pc.printf("--------------------------------------\r\n");
}

//A function to get a coherent CAN message from one, uninterrupted string
void getCANfrommessageOutText(void)
{
    //pc.printf("messageOutText is '%s'\r\n", messageOutText);
    messageOutTextWithSpaces = messageOutText;
    remove(messageOutText.begin(), messageOutText.end(), ' '); //Remove the spaces from the text to send out so it can be parsed.
    //pc.printf("After removing spaces, messageOutText is '%s'\r\n", messageOutText);
    string startofstring = messageOutText.substr(0,20); //Take the first 20 characters of the newly-formed string to get a spaceless CAN message.
    //pc.printf("String to parse is '%s'.\r\n", startofstring);
    partincrement = 0;
    part = startofstring.substr(0,3);
    dealwithpart();
    part = startofstring.substr(3,1);
    dealwithpart();
    part = startofstring.substr(4,2);
    dealwithpart();
    part = startofstring.substr(6,2);
    dealwithpart();
    part = startofstring.substr(8,2);
    dealwithpart();
    part = startofstring.substr(10,2);
    dealwithpart();
    part = startofstring.substr(12,2);
    dealwithpart();
    part = startofstring.substr(14,2);
    dealwithpart();
    part = startofstring.substr(16,2);
    dealwithpart();
    part = startofstring.substr(18,2);
    dealwithpart();
}

void defineCANmessage(void)
{
    //pc.printf("Defining CAN message 1.\r\n");
    //messageOut1.format = CANStandard;
    //messageOut1.id = 0x301;
    //messageOut1.len = 8;
    //messageOut1.data[0] = 0x06;
    //messageOut1.data[1] = 0x3f;
    //messageOut1.data[2] = 0xb2;
    //messageOut1.data[3] = 0x29;
    //messageOut1.data[4] = 0x19;
    //messageOut1.data[5] = 0x97;
    //messageOut1.data[6] = 0x67;
    //messageOut1.data[7] = 0x37;
}

void printMessageOut (void)
{
    //This function will print out whatever the CAN bus is sending out. Can't be used constantly as it sends '000 8 00 00 00 00 00 00 00 00' all the time.
    pc.printf("Message OUT: %03X %01X %02X %02X %02X %02X %02X %02X %02X %02X\r\n",messageOut1.id,messageOut1.len,messageOut1.data[0],messageOut1.data[1],messageOut1.data[2],messageOut1.data[3],messageOut1.data[4],messageOut1.data[5],messageOut1.data[6],messageOut1.data[7]);
}

void printMessageIn (void)
{
    //This function will print out whatever the CAN bus is receiving and keep it in messagetocheck.
    //messagetocheck = ("%03X %01X %02X %02X %02X %02X %02X %02X %02X %02X", messageIn.id,messageIn.len,messageIn.data[0],messageIn.data[1],messageIn.data[2],messageIn.data[3],messageIn.data[4],messageIn.data[5],messageIn.data[6],messageIn.data[7]);
    //pc.printf("Message IN: %03X %01X %02X %02X %02X %02X %02X %02X %02X %02X\r\n",messageIn.id,messageIn.len,messageIn.data[0],messageIn.data[1],messageIn.data[2],messageIn.data[3],messageIn.data[4],messageIn.data[5],messageIn.data[6],messageIn.data[7]);
}

//The 'main' function will run as soon as the program starts.
int main()
{
    pc.baud(115200); // serial port at 115200
    CanBus.frequency(500 * 1000); // CAN bus at 500k
    CanBus2.frequency(500 * 1000); // CAN bus at 500k
    CanBus.reset(); // clear any bus errors
    CanBus2.reset(); // clear any bus errors
    //NOTE: Print messages must be below this line to work.
    pc.printf("------------------------------------------\r\n");
    pc.printf("Welcome to Ken CAN test.\r\n");
    pc.printf("Setting CAN bus to 500k.\r\n");
    pc.printf("Setting serial port to baud rate 115200.\r\n");
    pc.printf("Using pins 9 and 10 for CANBus 1 and 30 and 29 for CANBus 2.\r\n");
    pc.printf("Version %d.%d\r\n",kMajorVersion,kMinorVersion);
    pc.printf("Build date %s %s\r\n",__DATE__,__TIME__);
    pc.printf("------------------------------------------\r\n");
    char c;
    
    //Define the list of expected hex values for use later
    //expectedlist[0] = 5;
    //for (int item : expectedlist)
    //  pc.printf("%d\r\n", item);
    //int integer = expectedlist[1];
    
    //Check for button presses
    while (1)
    {
        if (pc.readable())
        {
            c = pc.getc();
            if (c != NULL)
            {
                //When the a key is pressed, define a CAN message and send it.
                //pc.printf("A key was pressed! (%c)\r\n", c);
                messageOutText = "";
                if (c == '1')
                    {
                    addnewlineifneeded();
                    messageOutText = "301 8 01 01 01 01 01 01 01 01";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '2')
                    {
                    addnewlineifneeded();
                    messageOutText = "302 8 02 02 02 02 02 02 02 02";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '3')
                    {
                    addnewlineifneeded();
                    messageOutText = "303 8 00 00 00 00 00 00 00 33";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '4')
                    {
                    addnewlineifneeded();
                    messageOutText = "304 8 04 04 04 04 04 04 04 04";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '5')
                    {
                    addnewlineifneeded();
                    messageOutText = "305 8 05 05 05 05 05 05 05 05";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '6')
                    {
                    addnewlineifneeded();
                    messageOutText = "306 8 06 06 06 06 06 06 06 06";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '7')
                    {
                    addnewlineifneeded();
                    messageOutText = "307 8 07 07 07 07 07 07 07 07";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '8')
                    {
                    addnewlineifneeded();
                    messageOutText = "308 8 08 08 08 08 08 08 08 08";
                    addnewlinetonextmessage = 1;
                    }
                if (c == '9')
                    {
                    addnewlineifneeded();
                    messageOutText = "309 8 09 09 09 09 09 09 09 09";
                    addnewlinetonextmessage = 1;
                    }
                if (c == 'f')
                    {
                    addnewlineifneeded();
                    messageOutText = "7FF 8 FF FF FF FF FF FF FF FF";//NOTE: CAN IDs only go p to 7FF, not FFF.
                    addnewlinetonextmessage = 1;
                    }
                if (c == 'q')
                    {
                    pc.printf("Changing CAN bus speed to 125.\r\n");
                    CanBus.frequency(125 * 1000); // CAN bus at 125k
                    CanBus2.frequency(125 * 1000); // CAN bus at 125k
                    }
                if (c == 'w')
                    {
                    pc.printf("Changing CAN bus speed to 250.\r\n");
                    CanBus.frequency(250 * 1000); // CAN bus at 250k
                    CanBus2.frequency(250 * 1000); // CAN bus at 250k
                    }
                if (c == 'e')
                    {
                    pc.printf("Changing CAN bus speed to 500.\r\n");
                    CanBus.frequency(500 * 1000); // CAN bus at 500k
                    CanBus2.frequency(500 * 1000);// CAN bus at 500k
                    }
                if (c == 'r')
                    {
                    pc.printf("Changing CAN bus speed to 1000.\r\n");
                    CanBus.frequency(1000 * 1000); // CAN bus at 1000k
                    CanBus2.frequency(1000 * 1000); // CAN bus at 1000k
                    }
                //if (c == 's')
                //  {
                //  pc.printf("Sending authentic sats message.\r\n");
                //  messageOutText = "301 8 06 3F B2 29 12 97 67 37";
                //  }
                if (c == 'o')
                    {
                    incrementer = (incrementer * 16);
                    pc.printf("Multiplied Incrementer by 16. It's now now %d.\r\n", incrementer);
                    }
                if (c == 'i')
                    {
                    incrementer = incrementer + 16;
                    std::stringstream sstream;
                    sstream << std::hex << incrementer;
                    string stringsofar = sstream.str();
                    //pc.printf("Incrementer is now %d.\r\n", incrementer);
                    //pc.printf("StringStream says '%s'.\r\n", stringsofar);
                    int length = stringsofar.length();
                    //pc.printf("Length is %d/16.\r\n", length);
                    for (int i = 0; i < (16-length); i++)
                        stringsofar = "0" + stringsofar;
                    //pc.printf("stringsofar says '%s'.\r\n", stringsofar);
                    messageOutText = "305 8 " + stringsofar;
                    //pc.printf("Will try to send '%s'.\r\n", messageOutText);
                    }
                messageOut1.format = CANStandard;
                if (c == 'z' and spamon == 0)
                    {
                    resettest();
                    pc.printf("Starting spam sequence for ID %s. Press 'x' to end. \r\n", spampreamble);
                    spamon = 1;
                    incrementer = 0;
                    spamcount = 0;
                    spamstarttime = clock();
                    }
                //Pressing 'x' switches off spam mode
                if (c == 'x' and spamon == 1)
                    {
                    //spamcount = 9999999;
                    spamon = 0;
                    int spamendtime = 0;
                    spamendtime = clock();
                    int spamtime = 0;
                    spamtime = spamendtime - spamstarttime;
                    int spamtimeseconds = 0;
                    spamtimeseconds = (spamtime / CLOCKS_PER_SEC);
                    addnewlineifneeded();
                    pc.printf("Ending spam mode. Spammed %d times for %d ticks (%d seconds) at %d ticks per second.\r\n", spamcount, spamtime, spamtimeseconds, CLOCKS_PER_SEC);
                    //pc.printf("Clock right now is %d.\r\n", (spamtime));
                    //pc.printf("Ticks per second are %d.\r\n", CLOCKS_PER_SEC);
                    //pc.printf("Spam start/end is %d/%d.\r\n", spamstarttime, spamendtime);
                    //pc.printf("Spamtime was %d ticks.\r\n", spamtime);
                    int spamspersecond = 0;
                    spamspersecond = (10000 * spamcount);
                    //pc.printf("spamcount times 10,000 is %d.\r\n", spamspersecond);
                    spamspersecond = spamspersecond / spamtime;
                    //pc.printf("10,000 times spamcount divided by spamtime is %d spams per tick.\r\n", spamspersecond);
                    spamspersecond = ((spamspersecond * CLOCKS_PER_SEC))/10000;
                    pc.printf("Spams per second are %d.\r\n", spamspersecond);
                    pc.printf("Total spams ever are %d.\r\n", totalspamsever);
                    endtest();
                    //pc.printf("-------------------------\r\n");
                    }
                if (c == 'v' and idspamon == 0)
                    {
                    resettest();
                    idspamon = 1; //Set the 'idspamon' integer to 1 so ID spam happens.
                    idlistincrementer = 0;
                    pc.printf("Beginning spam of all possible CAN IDs (000 - 7FF).\r\n");
                    }
                if (messageOutText != "")
                    {
                    getCANfrommessageOutText();
                    sendCAN();
                    //CanBus.write(messageOut1);
                    //CanBus2.write(messageOut1);
                    if (spamon == 0 and idspamon == 0)
                        {
                        //printMessageOut();
                        }
                    messageOutText = "";
                    }
                }
        }

        
                //If spam mode is on, spam an incrementing CAN message
                if (spamon == 1)
                    {
                    spamcount ++;
                    totalspamsever ++;
                    incrementer ++;
                    std::stringstream sstream;
                    sstream << std::hex << incrementer;
                    string stringsofar = sstream.str();
                    int length = stringsofar.length();
                    for (int i = 0; i < (16-length); i++)
                    stringsofar = "0" + stringsofar;
                    messageOutText = spampreamble + " 8 " + stringsofar;
                    getCANfrommessageOutText();
                    sendCAN();
                    //CanBus.write(messageOut1);
                    //CanBus2.write(messageOut1);
                    wait(0.01);
                    }
                if (idspamon == 1)
                    {
                    std::stringstream sstream;
                    sstream << std::hex << idlistincrementer;
                    string idstring = "";
                    idstring = sstream.str();
                    //pc.printf("idstring says '%s'\r\n", idstring);
                    if (idstring.length() < 3)
                        {
                        for (int i = 0; i < (4 - idstring.length()); i++)
                            {
                            idstring = "0" + idstring;
                            }
                        }
                    //pc.printf("idstring now says '%s'\r\n", idstring);
                    //pc.printf("%s\r\n", idstring);
                    idstring = idstring + " 8 01 02 03 04 05 06 07 08";
                    //pc.printf("...and now idstring now says '%s'\r\n", idstring);
                    messageOutText = idstring;
                    getCANfrommessageOutText();
                    sendCAN();
                    //CanBus.write(messageOut1);
                    //CanBus2.write(messageOut1);
                    idlistincrementer++; //Only add 1 to the idlist incrementer at the end so the first ID it sends is '000'.
                    //pc.printf("ID list incrementer is now %d\r\n", idlistincrementer);
                    if (idlistincrementer >= 2048) //If the spam value gets to 2048 (7FF), end the spam sequence. RL only go up to 7FF.
                        {
                           idspamon = 0;
                           addnewlineifneeded();
                           pc.printf("Ending ID spam sequence.\r\n");
                           idlistincrementer = 0;
                           endtest();
                        }
                    wait(0.01);//ID spam at 100Hz
                    }
        //Check for CAN messages coming in
        if (CanBus.read(messageIn))
            {
            //CANCount ++;
            //printMessageIn();
            }
        if (CanBus2.read(messageIn))
            {
            CANCount ++;
            printMessageIn();
            if (1 == 1)
                {
                //string messagetocheck = "";
                //string messageintext = ("%03X %01X %d %d %d %d %d %d %d %d", messageIn.id, messageIn.len, messageIn.data[0], messageIn.data[1], messageIn.data[2], messageIn.data[3],messageIn.data[4],messageIn.data[5],messageIn.data[6],messageIn.data[7]);
                //messagetocheck = ("%03X %01X %02X %02X %02X %02X %02X %02X %02X %02X", messageIn.id, messageIn.len, messageIn.data[0], messageIn.data[1], messageIn.data[2], messageIn.data[3],messageIn.data[4],messageIn.data[5],messageIn.data[6],messageIn.data[7]);
                //pc.printf("Expectation is %d %d %d %d %d %d %d %d %d %d\r\n", expected1, expected2, expected3, expected4, expected5, expected6, expected7, expected8, expected9, expected10);
                int itsamatch = 1;
                addnewlineifneeded();
                if (expected1 != messageIn.id)
                    {
                    pc.printf("ID of %d does NOT match %d.\r\n", messageIn.id, expected1);
                    itsamatch = 0;
                    }
                if (expected2 != messageIn.len)
                    {
                    pc.printf("Length of %d does NOT match %d.\r\n", messageIn.len, expected2);
                    itsamatch = 0;
                    }
                if (expected3 != messageIn.data[0])
                    {
                    pc.printf("Data 0 of %d does NOT match %d.\r\n", messageIn.data[0], expected3);
                    itsamatch = 0;
                    }
                if (expected4 != messageIn.data[1])
                    {
                    pc.printf("Data 1 of %d does NOT match %d.\r\n", messageIn.data[1], expected4);
                    itsamatch = 0;
                    }
                if (expected5 != messageIn.data[2])
                    {
                    pc.printf("Data 2 of %d does NOT match %d.\r\n", messageIn.data[2], expected5);
                    itsamatch = 0;
                    }                
                if (expected6 != messageIn.data[3])
                    {
                    pc.printf("Data 3 of %d does NOT match %d.\r\n", messageIn.data[3], expected6);
                    itsamatch = 0;
                    }
                if (expected7 != messageIn.data[4])
                    {
                    pc.printf("Data 4 of %d does NOT match %d.\r\n", messageIn.data[4], expected7);
                    itsamatch = 0;
                    }
                if (expected8 != messageIn.data[5])
                    {
                    pc.printf("Data 5 of %d does NOT match %d.\r\n", messageIn.data[5], expected8);
                    itsamatch = 0;
                    }
                if (expected9 != messageIn.data[6])
                    {
                    pc.printf("Data 6 of %d does NOT match %d.\r\n", messageIn.data[6], expected9);
                    itsamatch = 0;
                    }
                if (expected10 != messageIn.data[7])
                    {
                    pc.printf("Data 7 of %d does NOT match %d.\r\n", messageIn.data[7], expected10);
                    itsamatch = 0;
                    }
                if (itsamatch == 0)
                    {
                    pc.printf("Message received was: %03X %01X %02X %02X %02X %02X %02X %02X %02X %02X\r\n",messageIn.id,messageIn.len,messageIn.data[0],messageIn.data[1],messageIn.data[2],messageIn.data[3],messageIn.data[4],messageIn.data[5],messageIn.data[6],messageIn.data[7]);
                    pc.printf("That does NOT match expectation! (%03X %01X %02X %02X %02X %02X %02X %02X %02X %02X)\r\n", expected1, expected2, expected3, expected4, expected5, expected6, expected7, expected8, expected9, expected10);
                    failsthistest++; //Add 1 to failsthistest to mark the fail
                    }
                }
            }
       }
}