The input to any pin on your PSoC may not be less than GND. So to measure a voltage < 0V you will have to level-shift it into the range of 0 .. 5V using an R ladder.
OK .. but i want to calculate multiple ADC value .. how i can switch pot ADC pin to different pin .
i only can use one ADCINC and my requirement is read to 4 input source separate value . is i need to change analogcolumn_inputmux port pin each time of interval to get all 4 channel value . if this is the right way for read multiple ADC value then please let me know how to write a code for multiple ADC read in run time .
Long time ago that I used that... Use an AMUX4 and configure it for your input pins. Look into datasheet for code example.
Keep in mind that the first 2 ADC samples after switching the mux are invalid.
Consider migrating to a 32 bit processor in a PSoC4. Kits available starting at $10. Including debugging capabilities!!!
Thanks for your advice but Please share the mux code for changing the input pin ....
or tell me below code related to mux input pin change...