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Cannot write nRF24L01+ register

Hi all,

I'm working on a board equipped with a nRF24L01+. It is PIC32 based and I'm writing a mini driver for it. So far my SPI and API seems to work correctly:

The 3 operation are:

  • Read the CONFIG register
  • Set PWR_UP bit
  • Read back the CONFIG register

Meanwhile my SPI and API work, the chip seems to ignore my write. For debugging pourpose, the SPI is running at 100 kHz and there are ~56uS between each SPI session.

Am I missing something?

Thanks,

Gabriele

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