Proprietary rf communication between nRF52810 and nRF52840.

RE: Proprietary rf communication between nRF52810 and nRF52840.

PoojaK — Mon, 09 Dec 2019 04:48:19 GMT

Hi,

I am using SES.

Thanks for your support.

RE: Proprietary rf communication between nRF52810 and nRF52840.

Hung Bui — Fri, 06 Dec 2019 14:37:38 GMT

Hi,

Which SDK are you using ?

If you look at the code you can see that tx_payload is created with NRF_ESB_CREATE_PAYLOAD() where the first byte is the pipe number, and the rest is the data.

You can create the payload without using NRF_ESB_CREATE_PAYLOAD() , please have a look inside nrf_esb_payload_t struct.

RE: Proprietary rf communication between nRF52810 and nRF52840.

Dmitry — Fri, 06 Dec 2019 08:47:23 GMT

Hi,

if you change NUM_VA_ARGS(__VA_ARGS__) to 2 then you should pass two bytes as data. To transmit just one byte (0xaa), define tx_payload this way:

static nrf_esb_payload_t tx_payload = NRF_ESB_CREATE_PAYLOAD(0, 0xaa);

Then if you need to transmit different values, change tx_payload.data[0] before calling nrf_esb_write_payload().

RE: Proprietary rf communication between nRF52810 and nRF52840.

PoojaK — Fri, 06 Dec 2019 02:33:50 GMT

Hi,

Thank you for your response

tx_payload defined here has 9 values

NRF_ESB_CREATE_PAYLOAD(0, 0x01, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00);

whereas in the definition of create payload

#define NRF_ESB_CREATE_PAYLOAD(_pipe, ...)
{.pipe = _pipe, .length =NUM_VA_ARGS(__VA_ARGS__), .data = {__VA_ARGS__}};
STATIC_ASSERT(NUM_VA_ARGS(__VA_ARGS__) > 0 && NUM_VA_ARGS(__VA_ARGS__) <= 63)

as far as I understood .pipe .length and .data are the only 3 arguments that I can see. I also could not find their code to transmit 0x00 to 0xFF.

Although I did try to change the .length and .data from NUM_VA_ARGS(__VA_ARGS__) to 2 and {__VA_ARGS__} to 0xAA respectively and expected the transmitted data to be 0xAA continuous. But that did not happen.

Can you please elaborate a bit more on where exactly should I write my data?

Waiting for response .

Thanks and Regards,

Pooja

RE: Proprietary rf communication between nRF52810 and nRF52840.

Dmitry — Thu, 05 Dec 2019 12:54:11 GMT

Hi,

look at esb_ptx\main.c, tx data is passed to nrf_esb_write_payload() function

static nrf_esb_payload_t tx_payload = NRF_ESB_CREATE_PAYLOAD(0, 0x01, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00);

...

    tx_payload.noack = false;
    if (nrf_esb_write_payload(&tx_payload) == NRF_SUCCESS)
    {

In esb_prx\main.c, data is received in nrf_esb_event_handler with nrf_esb_read_rx_payload(&rx_payload).