WHY ADC_read not work in this combination?

[corado]

adc_value is real/float


This doesn't work

Code: Select all

  adc_value :=(ADC1_Get_Sample(1) / 4096)*3.3; 

OR this

Code: Select all

Floattostr(((ADC1_Get_Sample(1) / 4096)*3.3),adc_value_str);

This works

Code: Select all

 adc_value := ADC1_Get_Sample(1);
  adc_value :=(adc_value / 4096)*3.3;

Why, dos the first one always show 0?

[corado]

Oh, the failure was
4096, correct is 4096.0
This is correct
Floattostr(((ADC1_Get_Sample(1) / 4096.0)*3.3),adc_value_str);