We are evaluating TWR-KV58F220M development board so we can upgrade from KV46xx MCU to KV5x MCU.
We installed Xpresso development environment and SDK2.2 for MKV5x (SDK_2.2_TWR-KV58F220M).
We tested a few demo apps and they worked properly. But when we tried HSADC sample from driver_examples folder. The ADC readings did not reflect the input at corresponding ADC input pins.
We tried two boards ordered from different sources and they behave the same. None of them worked. What we saw are constant values (with minor variations) from each channels, eg:
Sample 0 Sample 1 Sample 8 Sample 9
17688 21632 8928 0
16384 21576 208 0
16384 19976 208 8
16384 18592 264 8
16384 18440 240 0
16392 18480 232 0
16392 21608 232 0
16384 20184 208 0
16392 19088 248 8
16384 21624 200 8
16392 19600 200 0
The test input voltage was provided using either GND or 1.5v, with 20k ohm series resistor to the input.
Could anyone help us find out there is anything extra we need to do to get it to work? Or you have updated sample code for us to try?
Regards,
Shelby