run demo central-uart problem with NRF52840dk

RE: run demo central-uart problem with NRF52840dk

shandawei — Wed, 16 Mar 2022 17:20:41 GMT

Hi, maybe it's a issue about uart0, when i connect uart1,and try again ,it works fine, uart0 for debug and uart1 for data transfer.

Thanks

RE: run demo central-uart problem with NRF52840dk

Jørgen Holmefjord — Mon, 14 Mar 2022 15:19:04 GMT

Hi,

I'm still not able to reproduce the first issue. Can you explain in detail the exact steps required to reproduce it with an unmodified central_uart sample?

The second issue seems to already be reported here: https://devzone.nordicsemi.com/f/nordic-q-a/84635/peripheral_uart-sample-crashes-with-a-lot-of-data

Best regards,
Jørgen

RE: run demo central-uart problem with NRF52840dk

shandawei — Fri, 11 Mar 2022 19:25:20 GMT

Thanks for your reply,

I try with your suggestion, The first buffer is ok,but when i try to send the same data again, the rx buffer is wrong,the first byte was replaced by other char.

then i try the peripherial-uart without any change, then i connected via android ble app,and subsribe the notify characteristic, i recieved the data transfer from the uart, the first time the data is ok,but i try again the notify data is wrong like use central-uart.

When i try send some char to peripherial-uart device. the device will crash with error:

*** Booting Zephyr OS buil
d v2.7.99-ncs1-1  ***

Starting Nordic UART service exam
ple

ASSERTION
 FAIL [chunk_used(h, c)] @ WEST_TOPDIR/zephyr/lib/os/heap.c
:163
	unexpected heap state (double-free?) for memory at 
0x2000858c

*** B
ooting Zephyr OS build v2.7.99-ncs1-1  ***
Starting Nor
dic UART service example

RE: run demo central-uart problem with NRF52840dk

Jørgen Holmefjord — Fri, 11 Mar 2022 14:35:47 GMT

Hi,

Can you try with a different serial terminal application? I just tested the same example from nRF Connect SDK v1.9.1 together with RealTerm, and it is receiving the data correctly:

Looks like your application is shifted ~50 lines compared to the original sample, so there seems to be some changes in your application.

You can also check the UART pins with a logic analyzer, to see if the correct data is sent on the lines.

Best regards,
Jørgen