About disabling ESB and setting addresses with NRF51822

RE: About disabling ESB and setting addresses with NRF51822

Nicolas — Fri, 09 May 2014 10:24:43 GMT

I don't know why, but it seems that it works now. I don't understand where the problem was because I haven't changed anything. If it happens again, I'll post again here.

RE: About disabling ESB and setting addresses with NRF51822

Håkon Alseth — Fri, 09 May 2014 08:54:26 GMT

Hi Nicolas,

With your configuration, I'm seeing a delay from 0.14 (nominal) to 0.6 ms when disabling/update config/enabling. Here's my test while-loop:

        nrf_gpio_pin_set(0);
        nrf_esb_disable();
        while(nrf_esb_is_enabled());
        if (nrf_esb_set_channel(cnt & 0x3f))
            nrf_gpio_pin_clear(0);          
        nrf_esb_enable(); 
        while(!nrf_esb_is_enabled());

Could you post your project so I can debug it at my end?

Best regards Håkon

RE: About disabling ESB and setting addresses with NRF51822

Nicolas — Fri, 09 May 2014 06:47:59 GMT

The disable-time is variable, from 5ms to 60ms
Here are my ESB settings:


nrf_esb_init(NRF_ESB_MODE_PRX);
	
if(!nrf_esb_set_enabled_prx_pipes(0x3F)) error(0);
	
if(!nrf_esb_set_channel(rf_ch)) error(0);

if(!nrf_esb_set_crc_length(NRF_ESB_CRC_LENGTH_2_BYTE)) error(0);
if(!nrf_esb_set_max_number_of_tx_attempts(8)) error(0);
if(!nrf_esb_set_retransmit_delay(750)) error(0);
	
nrf_esb_enable_dyn_ack();
	
nrf_esb_enable();

When this happens, I am in PRX mode and no other NRF is using ESB on the same channel.

RE: About disabling ESB and setting addresses with NRF51822

Håkon Alseth — Wed, 07 May 2014 15:40:40 GMT

Hi,

Is this a consistent behavior at your end, Ie: is the disable-time variable?
Could you post your ESB settings?
If you're mid-transmit, and disable the ESB library will wait until the payload you're transmitting or receiving is finished. Are you in PRX mode or PTX mode when this happens?

Best regards Håkon

RE: About disabling ESB and setting addresses with NRF51822

Nicolas — Wed, 07 May 2014 15:08:40 GMT

The chip markings are N51822 QFAAG0 1342AA.
I'm using the "plain" esb_arm library. (But I've just tried with esb_sd_resources_arm and the problem remains the same)

RE: About disabling ESB and setting addresses with NRF51822

Håkon Alseth — Wed, 07 May 2014 14:56:11 GMT

Hi,

Could you post the chip markings of your device? Should be something like: N51822 QFAACA 1313AA
Are you using the esb_sd_resources_arm/gcc or the "plain" esb_arm/gcc library?

Best regards Håkon