Matrix user forums

I am new to C++ and I am trying to learn it using FLOWCODE.

I wrote a short program to add 4+4 in C and display it using FLOWCODE. This is the end of the program.

//Initialisation


//Interrupt initialisation code
option_reg = 0xC0;


//C Code
//C Code:
FCV_RE = 4 + 4 ;



//Output
//Output: RE -> PORT A
trisa = 0x00;
porta = FCV_RE;


mainendloop: goto mainendloop;
}

I wrote a similiar program using the FLOWCODE calculation box and the only difference was


//dan
//Calculation:
// RE = 4 + 4
FCV_RE = 4 + 4 ;

To my eye, the C code generated is identical yet the output to PORTA is different. Am I missing something.

Thanks for any help.

Regards,
Daniel Pollit
Toronto, Canada

Hello Daniel,

Is the code for the output icon the same? And what is the exact output (for both programs)?

Hi Steve,

The code in the Calculation Box is

RE = 4 + 4

When I run the program using C++ code

FCV_RE= 4 + 4 ;

the RE Variable stays at zero throughout and finally, the OUTPUT to PORTA of RE displays zero.

When I substitute or add the Calculation Box as above, and execute the program, the value in RE becomes 8 as the Calculation step is run and in the OUTPUT to PORTA the Led indicating 8 indeed lights up.

Thanks for any light you can shed.

Regards,
Daniel Pollit
Toronto, Canada

Are you just simulating the program on screen? Flowcode does not simulate your own C code.

But the program should work ok when downloaded to the PICmicro.

Hi Steve,

Thanks for clearing that up.

Regards,
Daniel Pollit
Toronto, Canada