File content as of revision 1:fa78d980522c:

#include "mbed.h"
#include "math.h"
 
Ticker scheduler1;
Ticker scheduler2;
Ticker scheduler3;
Ticker scheduler4;

Serial pc(USBTX, USBRX); // tx, rx

DigitalOut task_1_pin(p8, 0);
DigitalOut task_2_pin(p9, 0);

DigitalOut THY_S(p5, 0);  
DigitalOut IGBT_G(p6, 0); 
 
DigitalOut led1(LED1, 0);
DigitalOut led2(LED2, 0);
DigitalOut led3(LED3, 0);

DigitalIn ButtonPress(p21);

AnalogIn current(p15);






float i_load = 0;
int c_i = 0;

// ------------------------- Ramp up parameters  ----------------------------- //
float N = 10;        // number of steps
float tramp = 5000;  // ramp time in ms
float tstep = 0;     // step time
float toff = 0;      // cycle off time
float toff_sat = 1;  // off time saturation value - determines the final duty cycle
float ton = 0;      // fixed on time
float d = 0;         // duty cycle starting point
float d_sat = 0.9;   // determines the final duty cycle
int c = 0;           // step counter
int i = 0;           // cycle counter
int Ncycles = 0;     // Number of cycles


float resistance = 15.0;
float V_batt = 160.0;
float I_out = 10.0;
float V_out = 0.0;
float freq = 50;    //switching frequency in Hz

// -------------------------- RampUp RunTime  ------------------------------- //
int RunTime = 300;
int X = 0;
int Y = 0;
int RampUp = 0;






// Current reading and limit testing 
void task1() {    
    task_1_pin = !task_1_pin;
    i_load = current.read();
    i_load = i_load*3.3;    
    
    if(i_load > 1.6)
        {
            c_i++;
            if(c_i == 5)
            {
                led3 = 1;
                c_i = 0;
            }  
        }
        else
        {
            led3 = 0;
        }
}

//Serial communication
void task2() {    
    task_2_pin = !task_2_pin;
    pc.printf("\n\r Current = %f", i_load );    
    
}

//
void task3() {    
    led1 = !led1;
}

void task4() {    
    led2 = !led2;
}
 
int main() {
    pc.baud (115200);
    NVIC_SetPriority(TIMER3_IRQn, 0); // set mbed tickers to higher priority than other things
    
    task_1_pin = 0;
    task_2_pin = 0;
    THY_S = 0;
    IGBT_G = 0;  
    led1 = 0;
    led2 = 0;  
    led3 = 0;   
    
    scheduler1.attach(&task1, 0.0001); // Four independent tasks
    scheduler2.attach(&task2, 0.2); // 
    //scheduler3.attach(&task3, 0.02); // 
    //scheduler4.attach(&task4, 0.01); // 
 
    
    while(1) {
        
        d = 0.5;
        ton = d/freq;
        toff = (1/freq)-ton;
        ton = ton*1000;
        toff = toff*1000;
        if(led3 == 1)
        {
            break;
        }        
            
        IGBT_G= 1;          // set IGBT Ground side pin to high
        wait_us(50);
        THY_S= 1;
        wait_us(10);
        THY_S= 0;        
        wait_us(200);            
        wait_ms(ton);
        IGBT_G.write(0);        
        wait_ms(toff);          
        
    }
}