About the demo running micro-esb concurrently with ble in Blogs

RE: About the demo running micro-esb concurrently with ble in Blogs

Hung Bui — Wed, 18 Jan 2017 14:03:06 GMT

The way the esb_timeslot library works now is that same firmware used for both peer. When we have anything in the T payload buffer, at the beginning of a timeslot we will try to send it. So the payload is always sent as a TX packet, not an ACK payload packet. Therefore the TX payload is always empty when the device in PRX mode => no ACK payload.

To do what you plan to do, you need to modify the code, on your dedicated PRX device, you should disable the check inside TIMESLOT_BEGIN_IRQHandler()

if (m_transmit_fifo.free_items < sizeof(m_transmit_fifo.buf) && m_ut_state != UT_STATE_TX)

This will disable the nrf_esb_write_payload() at line 328 in that statement.

And you call nrf_esb_write_payload() when you want to add a ACK payload on the PRX side instead.

RE: About the demo running micro-esb concurrently with ble in Blogs

OPQ — Wed, 18 Jan 2017 08:51:52 GMT

Hi, Yes,I can enable auto ACK,but in the PRX,I can't found anywhere to fill my ACK payload.

RE: About the demo running micro-esb concurrently with ble in Blogs

Hung Bui — Mon, 16 Jan 2017 12:12:54 GMT

As I understand you have no problem keeping the PRX in RX mode all the time and power consumption is not the problem here.

On the PTX side, when you send a packet, with the NRF_ESB_DEFAULT_CONFIG configuration we have, auto ACK is enabled, esb library will switch to PRX mode automatically right after it transmit the TX packet. You don't have to do anything.

RE: About the demo running micro-esb concurrently with ble in Blogs

OPQ — Sat, 14 Jan 2017 01:54:54 GMT

Because in ESB mode,ack from PRX can carry payload,so I think my PTX maynot need to work in RX mode.

RE: About the demo running micro-esb concurrently with ble in Blogs

OPQ — Sat, 14 Jan 2017 01:51:05 GMT

Hi, Thanks. Yes,don't enable RX mode will not leadto a high power consumption,but in my application, I also want to achieve bi-direction data transfer between PTX and PRX,just like AUTO ACK.How to do that?

RE: About the demo running micro-esb concurrently with ble in Blogs

Hung Bui — Fri, 13 Jan 2017 12:58:31 GMT

Hi,

To do that you can simply don't enable RX mode when the the timeslot starts on the PTX side. It's nrf_esb_start_rx() call inside TIMESLOT_BEGIN_IRQHandler().