how to set nRF24 PTX with ack payload

[Chaw]

Hi，Nordic now, nRF52 as PRX, nRX24 as PTX.

App process

1. PTX send data via ESB, PRX can receive

   But nRF24 can not receive event HAL_NRF_TX_DS, why?

2. Then nRF52 send payload, but nRF24 can not receive

If nRF52 as PTX, nRF24 as PRX, it's OK.

Could you tell me how to set nRF24?

Thanks.

nrf52_esb_prx.rar

nRF24_usb_hid_rf.rar

[Hung Bui]

Hi Chaw,

We are suspecting it was the bug with the inverted NO_ACK bit on the nRF5 ESB library.

Could you try this workaround file to replace the original one and let me know if it fixed. Two modification been made on line 482 and 694.

nrf_esb_NOACK_Fix.c

[update] Here is an example of using nRF24LU1 as PTX and nRF52 as PRX with ACK payload.

ptx - Copy.zip

esb_prx - NoAckFix - Legacy.zip

[Chaw]

Hi, it doesn't work. same to without modification.

my app is this:

1. nRF24 as PTX, nRF52 as PRX

2. nRF24 send data to nRF52, it work well.

3. nRF24 change to PRX mode, nRF52 send data to nRF24 (via nrf_esb_write_payload)

this time, nRF52 nrf_esb_write_payload return success, can not receive TX Successful or TX Failed event.

nRF24 can not receive data from nRF52.

[Hung Bui]

@Chaw: If you actually don't receive data on nRF24 then it's not the bug with NO_ACK bit. We need to see how you configured on both side. Please base on the example in the SDK to add your configuration and send us your projects (both sides).

[Chaw]

nRF52 configuration:

err_code = esb_init();
APP_ERROR_CHECK(err_code);
err_code = nrf_esb_start_rx();
APP_ERROR_CHECK(err_code);

void nrf_esb_event_handler(nrf_esb_evt_t const * p_event)
{
    case NRF_ESB_EVENT_RX_RECEIVED:
NRF_LOG_DEBUG("RX RECEIVED EVENT\r\n");
    if (nrf_esb_read_rx_payload(&rx_payload) == NRF_SUCCESS)
    {
      tx_payload.noack = false;
      if (nrf_esb_write_payload(&tx_payload) == NRF_SUCCESS)
      {}
    }
}

nRF24 Configuration:

static void rf_config(void)
{
    hal_nrf_get_clear_irq_flags();
    hal_nrf_flush_rx();
    hal_nrf_flush_tx();

    hal_nrf_enable_ack_payload(true);
    hal_nrf_enable_dynamic_payload(true);
    hal_nrf_setup_dynamic_payload(0xff);

   hal_nrf_set_power_mode(HAL_NRF_PWR_UP);
   hal_nrf_set_operation_mode(HAL_NRF_PTX);
   CE_LOW();
}

static void rf_send_buffer()
{
  CE_LOW();
  hal_nrf_set_operation_mode(HAL_NRF_PTX);
  transmitted = false;
  hal_nrf_write_tx_payload(usb_out_buf, 32);
  CE_PULSE();
  radio_busy = true;
  while(radio_busy);
}

static void rf_receive_ms(uint16_t time_ms)
{
  packet_received = false;
  hal_nrf_set_operation_mode(HAL_NRF_PRX);
  CE_HIGH();
  while(time_ms--)
  {
    if (packet_received)
      break;
    delay_ms(1);
  }
  CE_LOW();
}

on main()

   while(true)
   {
     rf_send_buffer();
     if (transmitted)
     {
       rf_receive_ms(10);
     }
   }

Plz help me check.

[Hung Bui]

Hi Chaw,

Are you sure it's correct, in your code it's nRF52 works as PRX.

Also please upload the full project.

Have you made sure you use NRF_ESB_LEGACY_CONFIG instead of NRF_ESB_DEFAULT_CONFIG in esb_init() ?

[Chaw]

Hi，I have upload full project, nRF52 and nRF24