I took the most interesting things of the code....
I have very much WIP code in it, which would make it more complex to read 
All in all it is not the cleanest and best code and will crash if wrong data is sent 
PC code (reading and sending the data):
I took this serial class and the pcars shared memory header and following code (based on shared memory example):
Code:
// Used for memory-mapped functionality
#include <windows.h>
#include "sharedmemory.h"
#include <string>
// Used for this example
#include <stdio.h>
#include <conio.h>
#include "serial.h"
#include <sys/time.h>
#include <math.h>
#define _USE_MATH_DEFINES
// Name of the pCars memory mapped file
#define MAP_OBJECT_NAME "$pcars$"
using namespace std;
void sendData(Serial* SP, char* key, int iValue) {
char value[16];
sprintf(value, "%d", iValue);
char msg[32] = "^";
strcat(msg,key);
strcat(msg,",");
strcat(msg,value);
strcat(msg,"\n\0");
SP->WriteData(msg, sizeof(msg));
}
int main()
{
// Open the memory-mapped file
HANDLE fileHandle = OpenFileMapping( PAGE_READONLY, FALSE, MAP_OBJECT_NAME );
if (fileHandle == NULL) {
printf( "Could not open file mapping object (%d).\n", GetLastError() );
return 1;
}
// Get the data structure
const SharedMemory* sharedData = (SharedMemory*)MapViewOfFile( fileHandle, PAGE_READONLY, 0, 0, sizeof(SharedMemory) );
if (sharedData == NULL) {
printf( "Could not map view of file (%d).\n", GetLastError() );
CloseHandle( fileHandle );
return 1;
}
// Ensure we're sync'd to the correct data version
if ( sharedData->mVersion != SHARED_MEMORY_VERSION ) {
printf( "Data version mismatch\n");
return 1;
}
Serial* SP = new Serial("\\\\.\\COM3"); // adjust as needed
if (SP->IsConnected())
printf("We're connected");
Sleep(500);
int SLEEP_LOOP_MS = 10;
printf( "ESC TO EXIT\n\n");
while (true) {
int maxRpm = floor(sharedData->mMaxRPM+0.5);
sendData(SP, "maxrpm", maxRpm);
float speedMS = sharedData->mSpeed;
int speed = floor(speedMS*3.6 + 0.5);
sendData(SP, "tempo", speed);
int rpm = floor(sharedData->mRpm+0.5);
sendData(SP, "rpm", rpm);
int gear = sharedData->mGear;
sendData(SP, "gear", gear);
int fuel = floor(sharedData->mFuelCapacity*sharedData->mFuelLevel + 0.5);
sendData(SP, "fuelleft", fuel);
if ( _kbhit() && _getch() == 27 ) // check for escape {
break;
}
Sleep(SLEEP_LOOP_MS);
}
// Cleanup
UnmapViewOfFile( sharedData );
CloseHandle( fileHandle );
return 0;
}
Arduino code (receiving messages):
There I call functions like 'setGear' and 'setRpm', but I did not include them atm, because they are not finished or not working at all and not in your interest )
Code:
//timeout for serial read
int timeout = 10;
//maximum char[] lengh
int STRING_MAX = 255;
int mTempCrit = 0;
int mMaxRpm = 0;
// the setup routine runs once when you press reset:
void setup() {
Serial.begin(115200);
}
bool readSerialMessage(char* key, char *value) {
int count = 0;
int state = 0;
int keyCount = 0;
int valueCount = 0;
unsigned long previousMillis = millis();
while ((millis() - previousMillis) < timeout && count < STRING_MAX-1) {
if (Serial.available() > 0 ) {
bool keyOrValue = false;
char c = Serial.read();
switch (c) {
case '^':
if (state == 0)
state = 1;
break;
case ',':
if (state == 1)
state = 2;
break;
case '\n':
if (state == 2)
state = 3;
count = STRING_MAX;
break;
default:
keyOrValue = true;
break;
}
if (keyOrValue) {
switch (state) {
case 1:
key[keyCount] = c;
keyCount++;
break;
case 2:
value[valueCount] = c;
valueCount++;
break;
}
}
count++;
} else {
delay(1);
}
}
value[valueCount] = '\0';
key[keyCount] = '\0';
if (state == 3) {
return true;
}
else {
return false;
}
}
// the loop routine runs over and over again forever:
void loop() {
char key[STRING_MAX]; char value[STRING_MAX];
bool ret = readSerialMessage(key, value);
if (ret) {
if (strcmp(key, "gear") == 0) {
setGear(value[0]);
} else if (strcmp (key, "rpm") == 0) {
setRpm(atoi(value));
} else if (strcmp (key, "maxrpm") == 0) {
mMaxRpm = atoi(value);
} else if (strcmp (key, "tempo") == 0) {
setTempo(atoi(value));
} else if (strcmp (key, "fuelleft") == 0) {
setFuelLeft(atoi(value));
} else if (strcmp (key, "fuelcur") == 0) {
setFuelCur(atoi(value));
} else if (strcmp (key, "temp") == 0) {
setTemp(atoi(value));
} else if (strcmp (key, "tempcrit") == 0) {
mTempCrit = atoi(value);
} else if (strcmp (key, "abs") == 0) {
setAbs(value[0]);
} else if (strcmp (key, "trac") == 0) {
setTraction(value[0]);
} else if (strcmp (key, "inlight") == 0) {
setIngameLight(value[0]);
}
}
delay(1);
}
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Originally Posted by FRosad
