Sine wave with offset#

float uz_wavegen_sine_sample_with_offset(uz_wavegen_sine_t *self, float amplitude, float frequency_Hz, float offset)#

Outputs one sample of a sine wave with the specified DC offset.

Parameters:

  • self – Pointer to uz_wavegen_sine instance

  • amplitude – Amplitude for the sine wave

  • frequency_Hz – Frequency for the sine wave in Hz. Only positive values are permitted

  • offset – DC offset added to the sample

Returns:

Returns one sample for current system time

Example#

Listing 92 Example function call to sine wave generator with offset#
1#include "uz_wavegen.h"
2int main(void) {
3   float amplitude = 6.0f;
4   float frequency_Hz = 5.0f;
5   float offset = -5.0f;
6   uz_wavegen_sine_t* sine = uz_wavegen_sine_init();
7   float output = uz_wavegen_sine_sample_with_offset(sine, amplitude, frequency_Hz, offset);
8}

Description#

This function calculates a sine wave with \(y=sin(2 \pi f \cdot t) + x\) where \(x\) is the offset. The phase is tracked in the wavegen instance and advanced on each sample call.

Figure made with TikZ

Fig. 340 sine wave with offset