m3PI Buzzers

Support Robots
1

Hi,

I have the m3PI robot and I am working to learn to program it.

it looks like the pololu serial slave program has functions to operate the buzzer (do_play) but the m3pi library on the mbed website is missing a buzzer function.

Does this mean that if I want to use the buzzer on the m3PI, i need to put my own function in the ‘master’ m3pi library to call the ‘slave’ buzzer.

Also am i correct that the m3pi loses the use of buttons A, B, and C? neither the serial slave program nor mbed libraries mention the buttons.

2

This was my solution to the buzzers: (I tested it and it worked)

Add this to the m3pi library CPP file in mbed

int m3pi::playBuzzer (char* tune) {
    _ser.putc(DO_PLAY);  
    _ser.putc(strlen(tune));       
    for (int i = 0 ; i < strlen(tune) ; i++) {
        _ser.putc(tune[i]); 
    }
    return(0);
}

and this to the .h file in mbed

int playBuzzer(char* tune);
3

Hello,

Thank you for sharing your buzzer code for the m3pi! I am sure other m3pi user’s will find it helpful for their own projects.

-Derrill