__w1_f19_set_i2c_speed
result = __w1_f19_set_i2c_speed(sl, speed);
__w1_f19_set_i2c_speed(sl, 0);
__w1_f19_set_i2c_speed(sl, 1);
__w1_f19_set_i2c_speed(sl, 2);