Advice on doing several characteristic writes in a row as fast as possible ?

RE: Advice on doing several characteristic writes in a row as fast as possible ?

Vidar Berg — Mon, 22 Jul 2019 09:06:57 GMT

Yes, both approaches should work, although mine is not optimized for RAM usage:) I used a ring buffer because it allowed me to reuse the buffer implementation from the ble_app_ancs_c example.

RE: Advice on doing several characteristic writes in a row as fast as possible ?

AKYR — Fri, 19 Jul 2019 13:42:23 GMT

Ok I see it,

My implementation is kinda similar but I write in a TX_FIFO instead of inserting a tx_buffer and process to send the maximum amount of data I can from the TX_FIFO when you are processing a buffer.

I guess both method work :)

Do you have an argument to prefer one over the other ?

The only one I can see is in the case of small data inputs you will create a lot of buffer of small size whereas the data will br write in queue in the FIFO (but it is not my case so...).

Thank you !

RE: Advice on doing several characteristic writes in a row as fast as possible ?

AKYR — Fri, 19 Jul 2019 13:07:08 GMT

Hey Vidar,

Thanks for your answer :)

I'll have a look at it and I'll come back thx !

Have a good day,

Best regards,

Aloïs KYROU.

RE: Advice on doing several characteristic writes in a row as fast as possible ?

Vidar Berg — Fri, 19 Jul 2019 12:15:57 GMT

Hi Aloïs,

Please have a look at the attached example below. I based it on the ble_app_uart_c example in sdk 15.3.0 and added a ring buffer to queue write commands in the app in order to handle any "no resource" error from the send API.

devzone.nordicsemi.com/.../ble_5F00_app_5F00_uart_5F00_c_5F00_mod.zip

Note: the timer instance used to process the buffer in this example is not really necessary, and the project is configured for 52832 so you should copy the source code to a 52840 project before you try it.