Code is compiling, however only runs first half of code on Nucleo Board

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1 


This is my code:


#include "mbed.h"
#include "C12832.h"
#include "QEI.h"


#define LEFT_MOTOR_PWM PA_15
#define RIGHT_MOTOR_PWM PB_15
#define LEFT_MOTOR_DIRECTION PA_13
#define RIGHT_MOTOR_DIRECTION PB_7
#define RIGHT_MODE PB_12
#define LEFT_MODE PA_13
#define ENABLE2 PC_5


DigitalOut Left_Motor_Direction(LEFT_MOTOR_DIRECTION);
DigitalOut Right_Motor_Direction(RIGHT_MOTOR_DIRECTION);
    PwmOut motorPWM(LEFT_MOTOR_PWM); // Motor
    PwmOut motorPWMa(RIGHT_MOTOR_PWM); // Motor A
DigitalOut left_mode(LEFT_MODE); // Motor Direction
DigitalOut right_mode(RIGHT_MODE); //Motor A Mode
    DigitalOut enable (ENABLE2); // Enable
    
QEI encoder_left (PC_8,PC_6,NC,256);
QEI encoder_right (PA_12,PA_11,NC,256);
    C12832 lcd(D11, D13, D12, D7, D10);
   
   InterruptIn fire (D4);
    InterruptIn up (A2);
    InterruptIn down (A3);
    InterruptIn left (A4);
    InterruptIn right (A5);


int main () {
while(1) {

    motorPWM.period_ms (0.3); // Enable Motors
    motorPWMa.period_ms (0.3);
    Left_Motor_Direction = 1;
    Right_Motor_Direction = 1;
    left_mode = 1;
    right_mode = 1;
    enable = 1;
    
int read_period_us();
if (read_period_us >= 0)    {

lcd.cls(); //Clear the screen
lcd.locate(20,0); //Locate at (20,0)
lcd.printf("The Buggy Speed");//Print text
lcd.rect (32,10,96,30,1); //Draw a rectangle from (32,10) to (96,30)
lcd.locate(36,12); //Locate at (36,12)
lcd.printf("Is"); //Print text
lcd.locate(64,20); //Locate at (64,20);
lcd.printf(": %i", encoder_left.getRevolutions()); //Print text
wait(1);
 
                            
}
}
}```
2

Hello,

be so kind and use these three symbols ``` before and another three after your code in your post. That will format the code for better reading.

Like this -> Click 
#include "mbed.h"
#include "C12832.h"
#include "QEI.h"

#define LEFT_MOTOR_PWM PA_15
#define RIGHT_MOTOR_PWM PB_15
#define LEFT_MOTOR_DIRECTION PA_13
#define RIGHT_MOTOR_DIRECTION PB_7
#define RIGHT_MODE PB_12
#define LEFT_MODE PA_13
#define ENABLE2 PC_5

DigitalOut Left_Motor_Direction(LEFT_MOTOR_DIRECTION);
DigitalOut Right_Motor_Direction(RIGHT_MOTOR_DIRECTION);
PwmOut motorPWM(LEFT_MOTOR_PWM); // Motor
PwmOut motorPWMa(RIGHT_MOTOR_PWM); // Motor A
DigitalOut left_mode(LEFT_MODE); // Motor Direction
DigitalOut right_mode(RIGHT_MODE); //Motor A Mode
DigitalOut enable (ENABLE2); // Enable

QEI encoder_left (PC_8,PC_6,NC,256);
QEI encoder_right (PA_12,PA_11,NC,256);
C12832 lcd(D11, D13, D12, D7, D10);

InterruptIn fire (D4);
InterruptIn up (A2);
InterruptIn down (A3);
InterruptIn left (A4);
InterruptIn right (A5);

int main () {
    while(1) {
        motorPWM.period_ms (0.3); // Enable Motors
        motorPWMa.period_ms (0.3);
        Left_Motor_Direction = 1;
        Right_Motor_Direction = 1;
        left_mode = 1;
        right_mode = 1;
        enable = 1;
        int read_period_us();
        if (read_period_us >= 0) {

            lcd.cls(); //Clear the screen
            lcd.locate(20,0); //Locate at (20,0)
            lcd.printf(“The Buggy Speed”);//Print text
            lcd.rect (32,10,96,30,1); //Draw a rectangle from (32,10) to (96,30)
            lcd.locate(36,12); //Locate at (36,12)
            lcd.printf(“Is”); //Print text
            lcd.locate(64,20); //Locate at (64,20);
            lcd.printf(": %i", encoder_left.getRevolutions()); //Print text
            wait(1);

        }
    }
}

What is this?

int read_period_us();
if (read_period_us >= 0) {

It looks like a function declaration, but inside the main and without a definition. It certainly doesn’t look like something that can be compiled.

Something like that below would make more sense.

if (motorPWM.read_period_us() >= 0) {

BR, Jan

3

It is from the PWM mBed API, I am using it to read the pulsewidth period, however the same fault appears even when I comment that specific part out.

#include "C12832.h"
#include "QEI.h"


#define LEFT_MOTOR_PWM PA_15
#define RIGHT_MOTOR_PWM PB_15
#define LEFT_MOTOR_DIRECTION PA_13
#define RIGHT_MOTOR_DIRECTION PB_7
#define RIGHT_MODE PB_12
#define LEFT_MODE PA_13
#define ENABLE2 PC_5


DigitalOut Left_Motor_Direction(LEFT_MOTOR_DIRECTION);
DigitalOut Right_Motor_Direction(RIGHT_MOTOR_DIRECTION);
    PwmOut motorPWM(LEFT_MOTOR_PWM); // Motor
    PwmOut motorPWMa(RIGHT_MOTOR_PWM); // Motor A
DigitalOut left_mode(LEFT_MODE); // Motor Direction
DigitalOut right_mode(RIGHT_MODE); //Motor A Mode
    DigitalOut enable (ENABLE2); // Enable
    
QEI encoder_left (PC_8,PC_6,NC,256);
QEI encoder_right (PA_12,PA_11,NC,256);
    C12832 lcd(D11, D13, D12, D7, D10);
   
   InterruptIn fire (D4);
    InterruptIn up (A2);
    InterruptIn down (A3);
    InterruptIn left (A4);
    InterruptIn right (A5);


int main () {
while(1) {

    motorPWM.period_ms (0.3); // Enable Motors
    motorPWMa.period_ms (0.3);
    Left_Motor_Direction = 1;
    Right_Motor_Direction = 1;
    left_mode = 1;
    right_mode = 1;
    enable = 1;
    
/*
int read_period_us();
if (read_period_us >= 0)    { */

lcd.cls(); //Clear the screen
lcd.locate(20,0); //Locate at (20,0)
lcd.printf("The Buggy Speed");//Print text
lcd.rect (32,10,96,30,1); //Draw a rectangle from (32,10) to (96,30)
lcd.locate(36,12); //Locate at (36,12)
lcd.printf("Is"); //Print text
lcd.locate(64,20); //Locate at (64,20);
lcd.printf(": %i", encoder_left.getRevolutions()); //Print text
wait(1);
 
                            
//}
}
}
4

Point was about your statement

Only 3 symbols and you can edit your first post via a pen icon.

About your problem.
Maybe the interrupts are the reason. So try to insert a printf to your while loop and check the output in a PC terminal application.

printf("running\n");

You will see it only first time, I think.

BR, Jan