UART Transmission Max Bytes

RE: UART Transmission Max Bytes

Jared — Fri, 08 Mar 2024 09:50:23 GMT

LibUARTE example,

regards

Jared

RE: UART Transmission Max Bytes

AP1 — Fri, 08 Mar 2024 04:28:14 GMT

Is there any example other than app_uart to achieve more bytes at tx or any function that can able to send more bytes

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 21:20:56 GMT

Enabled Crystal, still only 2MBaud that works.

RE: UART Transmission Max Bytes

hmolesworth — Mon, 26 Feb 2024 21:16:56 GMT

I'll dig out my old boards and try it later; I assume you had the HFCLK crystal running ..

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 20:45:54 GMT

Tested on PCA10040, V1.10.2016.14

Very old one.

1.5, 2.5, 3 all failed. Got garbage. Only 2MBaud works. I am not doing loop back because loopback has same timing as itself. This is between PC through the onboard Segger and FTDI bridge as well. PRBS data are transferred and check for validity.

RE: UART Transmission Max Bytes

hmolesworth — Mon, 26 Feb 2024 20:37:50 GMT

Curious, mine works; what silicon version did you test on?

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 17:08:05 GMT

Tried with the baud rate calculation. The only one that works higher than 1MBaud is 2MBaud on the nRF52832.

The result with IOsonata at 2MBaud is 201 KB/s.

Results with nrfx SDK5 is 183.7KB/s

nrfx 3.3 is 121KB/s

Updates :

On nRF52L15 UART30 :

IOsonata : 168KB/s at 2MBaud

nrfx 3.3 : can't handle the speed.

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 15:37:20 GMT

No compile error. It's the same code. Only the UART00 is used instead of other UART instance. Nothing happens when UART00 is used. Must probably the Zephyr version does not take into account the different timing that is not the same as the other UART instances.

RE: UART Transmission Max Bytes

Jared — Mon, 26 Feb 2024 10:39:04 GMT

Hi,

What error are you getting NRF_ERROR_NO_MEM?

As others have already pointed out, using the UART peripheral through nrfx UART driver is better for higher throughput,

regards
Jared

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 03:59:51 GMT

Chip antenna builtin for both

RE: UART Transmission Max Bytes

hmolesworth — Mon, 26 Feb 2024 03:58:03 GMT

BLYSTL15: Hopefully chip antenna, I'll design that in when available, ECG patch - keep me posted

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 03:37:12 GMT

ok, thanks. I guess, I'll have to do some trial & errors.

For the 54 PDK, you'll need to ask your Nordic rep.

We are module maker. We'll have 2 new modules based on the 54.

BLYSTL15 : nRF54L15 module, 7x10x1.6mm, both crystals and all inductors are inside, all GPIO avail.

BLYSTH20 : nRF54H20 module, 9x14x1.6mm, both crystals and all inductors inside, all GPIO avail.

RE: UART Transmission Max Bytes

hmolesworth — Mon, 26 Feb 2024 03:15:02 GMT

I tried a few but not all; how do I get a 54 PDK? I hoped they'd just sent me one :-)

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 01:50:22 GMT

Thanks for the info. I'd love to try higher baudrate. Are the calculation good for all nRF families ? The IOsonata driver work for all from nRF51 to nRF54, including nRF91

RE: UART Transmission Max Bytes

hmolesworth — Mon, 26 Feb 2024 01:46:28 GMT

Excellent! How about performance at 1.5MBaud or even the max baud value for large packets which seems to be 1,777,760; baud register value 0x1C71'B000. More at regarding-uart-baud-rate-generator-baudrate-register

RE: UART Transmission Max Bytes

Nguyen Hoan Hoang — Mon, 26 Feb 2024 00:46:59 GMT

You won't be able to achieve good results with app_uart. Use either nrfx_uart or the IOsonata. See test results.