QN908x ADC setup for PA00

[ankur_rathi]

I am using adc basic demo example code from SDK_2.x_QN908XCDK.
In this example code, the voltage is measured on PA08 but I want to measure across PA00.
I have modified the following code to measure voltage across PA00:
#define DEMO_ADC_CHANNEL 8 to 0
#define PIN0_IDX                         0u   /*!< Pin number for pin 0 in a port */
const uint32_t portA_pin0_config = (
    IOCON_FUNC1 |                                            /* Selects pin function 1 */
    IOCON_MODE_HIGHZ |                                       /* Selects High-Z function */
    IOCON_DRIVE_LOW                                          /* Enable low drive strength */
  );
  IOCON_PinMuxSet(IOCON, PORTA_IDX, PIN0_IDX, portA_pin8_config);

I tried to measure voltage across PA09-PA11 and I get correct value by modifications in the code wrt GPIO.
But, when I try the same with PA00 or with PA01, PA04 and PA05, I always gets the wrong value.
I tried with some modifications on adcConfigStruct and  adcSdConfigStruct, but to no success.
What is the difference between those set of pins and is their any different configuration for these pins.

I am using QN9080DK-V1.3 development board or this dev board has different setup for those pins.

[estephania_mart]

Hello,

By any chance, have you tried using the config tools to achieve what you are looking for? Do you have the same behavior if you try using them? 

Regards, 
Estephania 

[ankur_rathi]

Hello Estephania,
Yes, I tried with the config tool also but to no success, its the same behavior.
I was thinking it maybe specific to dev board.
Are you also facing the same issue?

[ankur_rathi]

Can anyone from the NXP technical team verify this?
Or let me know what I am doing wrong.

[arpad_toth]

Any update?