7 years, 8 months ago.

Mbed to Mbed Serial Inconsistency

Hi there

I'm designing a data acquisition system for a car and I'm having a big problem with mbed to mbed serial. I'm trying to print out the characters a, b, c, d, e and f in succession repeatedly (just as a test, the completed system will be much more complex). The values I'm getting across are the right characters mostly, but in the wrong order, and with some anomaly characters. I've tried doing the same with hex values and the values I receive are more often than not completely wrong, and again in the wrong order.

I've tried using and not using interrupts, different serial pins, different mbed, different computer, each gives the same result of inconsistent data. The code I'm using is included below, can anyone think of anything that might be wrong?

Thanks for your help!

Serial in:

'#'include "mbed.h"

Serial in(NC,p10); Serial pc(USBTX, USBRX);

int main() { pc.baud(19200); in.baud(9600);

while(1) { char c = in.getc(); pc.printf("%c\n\r",c);

}

}

Serial out:

'#'include "mbed.h"

Serial out(p9,NC);

char alph[6]={'a','b','c','d','e','f'};

int main() {

out.baud(9600);

while(1) { for(int i=0; i<6; i++) { out.putc(alph[i]); } wait_ms(1); } }