Add ublox checksum generating program

[fw/altos] / src / drivers / ublox-csum.5c

#!/usr/bin/nickle
string[] speeds = { "57600", "19200", "9600" };

string make_set_nmea(string speed) {
        return sprintf ("PUBX,41,1,3,1,%s,0", speed);
}

int csum(string x) {
        int csum = 0;
        for (int i = 0; i < String::length(x); i++)
                csum ^= x[i];
        return csum;
}

for (int i = 0; i < dim(speeds); i++) {
        string s = make_set_nmea(speeds[i]);
        int c = csum(s);
        printf ("/* $%s* */\n", s);
        printf ("#define SERIAL_SPEED_STRING   \"%s\"\n", speeds[i]);
        printf ("#define SERIAL_SPEED_CHECKSUM \"%02x\"\n", c);
}