Read Register

[HelplessGuy]

Hello everyone,

I am trying to read a bit of a register, but it is never changing. But I know that it is changing. So I think, I am having a some mistake. Can someone help me?

XAdcPs XAdcPs_Inst;
[here init]
XAdcPs_ReadReg((&XAdcPs_Inst)->Config.BaseAddress, 0x04) & 0x00000040) == 0x00000040

 

[jpeyron]

Hi @HelplessGuy,

I would suggest to incorporate the Integrated Logic Analyzer (ILA) into your design. Here is a tutorial for the ILA.

thank you,

Jon

[HelplessGuy]

Hi @jpeyron

Thanks for the advice. Is this function not working correct?

[jpeyron]

Hi @HelplessGuy,

Have you tried using the XAdcPs_ReadFifo(InstancePtr) function in the xadcps.h. I suggested the ILA to help with debugging your design.

thank you,

Jon

[HelplessGuy]

What is the difference between both functions?

I want to understand, what kind of function I have to use for what

[jpeyron]

Hi @HelplessGuy,

I suggest using the XAdcPs_ReadFifo(InstancePtr) since this function calls the XAdcPs_ReadReg() function. Here and here are links to more XADc documentation that should be useful.  I would suggest reaching out to Xilinx support about the differences between the two functions in their IP Core.

thank you,

Jon