Other Parts Discussed in Thread: CC2640
Hi all,
I am integrating the CC2640R2F 4x4 with a pressure sensor in a custom board. The code is working well in the launchpad, but when I download it to the custom board it doesn't advertise. Here the most important points:
- The code (broadcasting of some bytes every 100ms) is working well in the CC2640R2F-LAUNCHXL.
- The RF front-end is configured with a Johanson Balun (2450BM14G0011) and a Johanson chip antenna (2450AT07A0100T). The code was modified by including the predefined symbol CC2640R2DK_4XS and the RF front-end was changed to RF_FE_DIFFERENTIAL | RF_FE_INT_BIAS.
- According to the oscilloscope, the device seems to be working (I can see constant current of 2.5-3mA), but I can't see the typical current profile of the advertisements.
- When measuring the RF_P and RF_N output from the BLE chip, it gives around 30-40mV, which I think it is correct. All the voltages are correct, with VDD_RF around VDD/2, which I believe is also correct.
- I have tried using and removing the 32kHz clock, and also removing and including the POWER_SAVING define, but no result.
- The RF_part of the board is attached below, with M1 being a 0ohm resistor.
Even if the RF part is not tuned, shouldn't I be able to see the advertisement profile in the oscilloscope? I am out of ideas here :/. Thanks in advance!
BR,
Ismael
