PROCESSOR-SDK-AM335X: ADC step configuration registers

Ok

Gaurav Aggarwal1 said:

Another thing, what are these YPPSW, XNPSW, XPPSW, XNNSW, YPNSW< YNNSW, WPNSW? Are these related to touch screen or they are general. In my application, I have to measure the supply voltages then I have to enable these bits accordingly or not?

Yes, those relate to touchscreen.  Are you using the TSCADC peripheral for touchscreen plus general purpose ADC, or are you using it only as a general purpose ADC?  You need to be very careful about resource sharing if you are doing both, i.e. you don't want one to trample on the other.

Gaurav Aggarwal1 said:

If I want to use channel 4 (AIN3) then should I use step configuration register 4? Please elaborate relation between channel and step configuration register.

Steps and channels are independent.  For example, in Linux we use 12 steps just for the touchscreen controller.  That corresponds to 5 samples of x, 5 samples of y, and 2 samples of z.  Within those 5 samples we can then discard min/max and average the remaining.  The other steps are available for general purpose ADC function.  If you're not using touchscreen, you could use all the steps.

Hi,

I don't want to use touchscreen. I want to use ADC for general purpose to measure supply voltage. I need to use AIN0, AIN1 and AIN3. Can you tell me which registers I need to configure for selecting channel and all steps.

Regards

Gaurav