divide by 0 bug in Chapter03/ArduinoSketches/08_input_features.ino

[SSP6258]

Hi

I am studying this great TonyML book, it is very practical and useful.

I am a little confuse with the example in CH3

The code in CH3 seems has divide by 0 bug, since tflu_i_scale initialized with 0

or will it be replace somewhere ?

Thank you
Jack

float   tflu_i_scale      = 0.0f;

// Store the normalized and quantized samples in the circular buffers
  t_vals[cur_idx] = quantize(t, tflu_i_scale, tflu_i_zero_point);
  h_vals[cur_idx] = quantize(h, tflu_i_scale, tflu_i_zero_point);

inline int8_t quantize(float x, float scale, float zero_point)
{
  return (x / scale) + zero_point;
}