RE: nRF24AP2 - SPI - response messages?

mtbeck — Thu, 27 Aug 2015 14:20:51 GMT

Hi Kenneth

Thanks for your support.

I solved the problem. The first problem was the physical SEN-connection between my controller and the nrf24AP2, on one module it seems that the physical/electrical connection is lost.

On my second module, the SEN-connection was ok, but there was a bug in the checksum-calculation.

Now, it works.

Thanks.

Best regards

RE: nRF24AP2 - SPI - response messages?

Kenneth — Tue, 18 Aug 2015 15:41:29 GMT

Hi,

The first common problem when using byte synchronous serial interface is typically that the reset sequence is not applied, see figure 16, however since you are receiving the ANT startup message I think that is not the problem here.

It seems you have problem to write data from the host to the nRF24AP2, most likely the problem is that the serial message is wrong. Please refer to figure 19 in the nRF24AP2 Product Specification v1.2. In specific check that you are actually transmitting the checksum as indicated after /SEN go high.

A test message you can try is to read the ANT version, by writing 0x02, 0x4D, 0x00, 0x3E, 0xD4 (=Checksum) after recieving 0xA5.

Hope that helps,

Kenneth