ST VD6283 - Flicker Measure Using an External ADC

A.3 Flicker measure using an external ADC
CustomerPrivate client;
void *hdl;
// sensor initialization
Error = STALS_Init("VD6283", &client, &hdl);
// First configure sensor settings
Error = STALS_SetGain(hdl, STALS_CHANNEL_6, 0x0a00, &current_gain);
Error = STALS_SetFlickerOutputType(hdl, STALS_FLICKER_OUTPUT_ANALOG);
// start Flicker sampling
Error = STALS_Start(hdl, STALS_MODE_FLICKER, STALS_CHANNEL_6);
// capture data from GPIO2 pin through an external RC filter using a platform dependent adc.
// Sampling frequency must be greater than 4Khz.
Platform_capture_adc(data);
Platform_fft(data, data_fft);
flk_frequency = Platform_flk_detect(data_fft);
printf("flicker frequency %d hz\n", flk_frequency);
// stop acquisition
Error = STALS_Stop(hdl, STALS_MODE_FLICKER);
// Release sensor
Error = STALS_Term(&hdl);
UM2878
Flicker measure using an external ADC
UM2878 - Rev 1
page 22/27