Oyenike Adigun

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10 years, 9 months ago.

using getchar() to print a set of values

hi, i am using an accelerometer and after it's test connection i want to press a 'particular' character on the keyboard to display my values. the code i used can accept 'any' character on the keyboard.

char a;

printf("Enter character:"); a = getchar(); printf("Character entered:"); putchar(a);

1 Answer

David Smart
10 years, 8 months ago.

I didn't compile the following, but it might be about what you want to do (embellished a bit):

#include "mbed.h"

Serial pc(USBTX, USBRX);

int main() {
    pc.printf("\r\n\r\nMy Program - Build " __DATE__ " - " __TIME__ "\r\n");
    while (1) {
        if (pc.readable()) {
            switch(pc.getc()) {
                case 'a':
                    // do what you want for 'a'
                    break;
                case '3':
                    // do what you want for '3'
                    break;
                default:
                    pc.printf(" - unexpected character\r\n");
                    break;
            }
        }
        // do other things here, if anything, that run all the time.
    }
}

The "pc." prefix to the printf isn't really necessary, just my practice.

Accepted Answer