S2-LP - Interrupt flag problem

[Slh]

Hi,

Some time ago I wrote a software with some changes from this library and successfully tested it with the STEVAL-FKI868V1 board and a ST board (STM32F779 EVAL).

Now I made my own hardware with a little changes in the microcontroller pins. Communication with the S2-LP via SPI works and I can read and write data to the S2-LP registers. The problem I am facing is that when I send the command "S2LPCmdStrobeTx();" for sending data over the air, I expect that pin 23 of S2LP (GPIO3) goes low like with STEVAL-FKI868V1 Board, but no reaction can be seen in this pin.

To make sure the software works, I removed S2-LP chip from my board and connected the SPI lines and  required GPIO of STEVAL-FKI868V1 to my board with wire and saw that the software works correctly with that Board.

The question is why the S2-LP won't give me the Interrupt on my board.
I also attached the schematic.

Thanks for help or suggestions.

 

[Slh · Accepted solution]

Ok, I found the problem. I changed the C50 to 470pF and now works.