module pwm(
    input logic clk, reset,
    // Load control signal, if this is high we should load a new sample
    input logic load,
    // The audio sample to play back
    input logic [15:0] sample,
    // The audio output pin
    output wire pwm_pin
);

// What I imagine is that the counter here can be incremented each clock.
// If the counter value is less than or equal to the value in the sample buffer
// then you should turn on the PWM output. Otherwise if the counter is greater
// than the value in the sample buffer the output will be off.
//
// This means that for small sample values the output will be enabled for only
// short periods of time, exactly what we want.
logic [15:0] pulse_counter;

// A buffer to hold the sample in. Every clock cycle you should check load
// to see if you should pull the sample off the bus and store it in here.
logic [15:0] sample_buffer;

// A control signal for driving the PWM high or low. This gets translated into
// either a 'z or a '0 later as the PWM requires.
logic should_output;

// NOTE: tristating the pwm pin with a 'z will output a 1
//       sending a 0 will pull the pin to 0 as usual
assign pwm_pin = should_output ? 'z : '0;


endmodule