Writing a Variable as a string input to a function

Hi

I am currently trying to write c++ for the arm 7t using Metrowerks Codewarrior.

The issue im having is that the function to enable me to write via a COM port
connected to the arm7t only accepts strings.

for instance the function call would be

Code:

---

serial_print (COM0_USER, "you string here");

---

where com0_user is to define the port being used. This would then display that message on say windows terminal running on a host pc.

I need to use in in a similar way to say Cout. i.e being able to send a result from a calculation performed to the screen. Any ideas??

This is the deffinition of serial print:-

Code:

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void serial_print (unsigned port, char *s)

{
        while ( *s != 0 ) {
                switch (port) {
                case        COM0_USER:
                while ( TX_READY(GET_STATUS(UART0_BASE))==0);
                PUT_CHAR(UART0_BASE,*s++);
                break;
                case        COM1_DEBUG:
                while ( TX_READY(GET_STATUS(UART1_BASE))==0);
            PUT_CHAR(UART1_BASE,*s++);
                break;
                }
        }       
}

---

Any suggestions or ideas would be welcomed, thanks all for your help

You can use a std::stringstream object to convert whatever you are trying to display into a string/const char* and then pass that to the serial_print function.

thankyou, i shall try that now;

Ok, ive looked into that and it looks like a feasable solution but i would like to do it the following way if possible (again need help please)

I want to make a new function called

Code:

---

void serial_print (unsigned port, x)

---

where the x value could be either an iteger or a string.
could anyone help me write this?

i would only need it for COM0 so the code above can be simplified to

Code:

---

void serial_print (unsigned port, *x)

{
        while ( *x != 0 ) {
               
                while ( TX_READY(GET_STATUS(UART0_BASE))==0);
                PUT_CHAR(UART0_BASE,*s++);
                        }
}

---

know i dont know how to implement it so it will write the full variable any help greatly appreciated.

You can overload functions in C++ (same name, different arguments) so you could do:

Code:

---

void serial_print(unsigned port, int x)
{
    // Convert int to string/const char* here using stringstream

    serial_port(port,converted_int_value_as_const_char_ptr);  // Call the other "string" version
}

void serial_print(unsigned port, const char* blah)
{
    // Do your usual stuff to write data here
}

---

Then you could call either one depending on what type of data you have:

Code:

---

int value;
...
serial_print(COM0_USER,value);  // Call int version
serial_print(COM0_USER,"your string here");  // Call const char* version

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