ESB communication Ack control

[Ali110]

Hi,

I want to use a LNA for make our sensitivity better, Then i should to put a RF switch and have a control in sending and receiving, because when the device is in receiving mode , must be the LNA track active and when the device is in sending mode, the free track without LNA by RF switch will be active. The problem is, after receiving, NRF send back automatically an Ack, I want to have control in ack sending. because before sending i have to change the RF root with RF switch. In follow, you can see my setting.

nrf_esb_config.protocol = NRF_ESB_PROTOCOL_ESB;
nrf_esb_config.event_handler = nrf_esb_event_handler;
nrf_esb_config.crc = NRF_ESB_CRC_8BIT;
nrf_esb_config.bitrate = NRF_ESB_BITRATE_1MBPS;

nrf_esb_config.mode = NRF_ESB_MODE_PRX;

nrf_esb_config.tx_output_power = NRF_ESB_TX_POWER_0DBM;

nrf_esb_config.retransmit_delay = 600;

nrf_esb_config.retransmit_count = 3;

nrf_esb_config.tx_mode = NRF_ESB_TXMODE_AUTO;

nrf_esb_config.radio_irq_priority = 2;

nrf_esb_config.event_irq_priority = 1;

nrf_esb_config.payload_length = 16;

nrf_esb_config.selective_auto_ack = true;

thanks.

Best regard,

Ali

[Sigurd]

Hi!

What SDK and SDK version are you using?

[Ali110]

Hi,

Thanks for fast relay.

nRF5_SDK_17.1.0_ddde560

s140nrf52720

Segger embedded studio

[Sigurd]

Unfortunately, there is no PA/LNA implementation available for nrf_esb.

nrf_esb is open source, so you can add pin clear/set functions, and use PPI/GPIOTE where needed. You may find this thread useful:
https://devzone.nordicsemi.com/f/nordic-q-a/31050/controlling-a-pa-lna-sky66112-11-with-the-nrf52832-and-proprietary-protocols 

[Ali110]

I only want to know, where in the nrf_esb.c library i can put a gpio output before the ack send. 

[Sigurd]

Ali110 said:

I only want to know, where in the nrf_esb.c library i can put a gpio output before the ack send. 

I would suggest nrf_esb.c line 834

and then turn LNA back on again in start of function on_radio_disabled_rx_ack()