How to get more output to PC (nrf52832)

RE: How to get more output to PC (nrf52832)

suker — Sat, 27 May 2017 01:41:01 GMT

thank you!

RE: How to get more output to PC (nrf52832)

Hung Bui — Fri, 26 May 2017 15:37:03 GMT

You can just simply replace NRF_SERIAL_MODE_IRQ with NRF_SERIAL_MODE_DMA in NRF_SERIAL_CONFIG_DEF then you will have DMA mode. You should try to increase the SERIAL_BUFF_TX_SIZE and SERIAL_FIFO_TX_SIZE, that would also help. I can achieve quite good result by increasing them, upto 966kbps with 1Mbps baud rate.

RE: How to get more output to PC (nrf52832)

suker — Fri, 26 May 2017 03:03:40 GMT

is there have example for EasyDMA for UART. I realy need it.

RE: How to get more output to PC (nrf52832)

Hung Bui — Thu, 25 May 2017 09:54:00 GMT

@Suker: I assume above is the result when you run my test ? At least at 460800 it's more than 20kB/s ? Please be aware that the example sending UART packet without using EasyDMA. I spot that it would take extra time between each byte. If you use EasyDMA you should achieve better through put.

RE: How to get more output to PC (nrf52832)

suker — Thu, 25 May 2017 09:08:34 GMT

921600 0.5SEC 460800 0.8SEC

RE: How to get more output to PC (nrf52832)

Hung Bui — Wed, 24 May 2017 07:22:24 GMT

It's SDK v13.

RE: How to get more output to PC (nrf52832)

suker — Wed, 24 May 2017 05:08:21 GMT

which Version of SDK are you used , I used nRF5_SDK_12.2.0_f012efa , but do not have peripheral\serial .

RE: How to get more output to PC (nrf52832)

Hung Bui — Tue, 23 May 2017 13:30:00 GMT

I don't see any problem to achieve it. How do you test. The attached image in my answer above showing the time it take to send 20kB, it was about 30kB/s at 460800 bps (seems that the Segger chip doesn't support above 460800bps).

I also attached the test file. Replace the main.c with main.c in peripheral\serial to test.

RE: How to get more output to PC (nrf52832)

suker — Tue, 23 May 2017 01:35:57 GMT

I mean that I want to get output on uart at 16KB/S. I change baudrate to 1Mbps/460800bps, uart output overflow.

RE: How to get more output to PC (nrf52832)

Hung Bui — Mon, 22 May 2017 12:54:55 GMT

If you have a logic analyzer, please check if there is actually data clocked out from the nRF5 to the cp2102

RE: How to get more output to PC (nrf52832)

Hung Bui — Mon, 22 May 2017 12:53:49 GMT

I mean how do you test and find that it doesn't support 1Mbps ? You mean you receive nothing on PC when changing baudrate to 1Mbps/460800bps?

RE: How to get more output to PC (nrf52832)

suker — Mon, 22 May 2017 11:34:42 GMT

1,I donot change uart code except baudrate 2,Yes,I test no flow control and RTS/CTS,The result is the same.

RE: How to get more output to PC (nrf52832)

Hung Bui — Mon, 22 May 2017 07:57:32 GMT

Could you describe how you tested ? Have you used hardware flow control ?

RE: How to get more output to PC (nrf52832)

suker — Sat, 20 May 2017 08:52:54 GMT

yes I test 460800, uart_to_usb chip cp2102, uart output overflow.

RE: How to get more output to PC (nrf52832)

Hung Bui — Fri, 19 May 2017 10:08:37 GMT

I mean to do a throughput test. You send dummy data to UART and check how long would it take. Please try with 460800baud to check if it was the PC doesn't support 1Mbps or not.

RE: How to get more output to PC (nrf52832)

suker — Fri, 19 May 2017 06:30:50 GMT

1,I use nrf52832.

2,do you add more args on log system? I add a function nrf_log_frontend_std_8,but nothing output.

RE: How to get more output to PC (nrf52832)

Hung Bui — Thu, 18 May 2017 13:18:51 GMT

Hi Suker,

Please state which chip you are using?

Could you try to test through put on UART only (print dummy data to PC, skip the ESB and ADC part). There are some UART driver on PC that actually doesn't support 1Mbps.

Have you tried to test with 460800baud ?

Sending 20kB:

]

main.c

main.c with EasyDMA and bigger buffer