how to use scanf in nrf5340 DK using nrf connect sdk

RE: how to use scanf in nrf5340 DK using nrf connect sdk

Håkon Alseth — Mon, 19 Apr 2021 10:49:32 GMT

Hi,

You can get data from the uart console by adding "CONFIG_CONSOLE_HANDLER=y".

Here's hello world with this feature:

devzone.nordicsemi.com/.../hello_5F00_world_5F00_uart.zip

Kind regards,

Håkon

RE: how to use scanf in nrf5340 DK using nrf connect sdk

SRINI — Mon, 19 Apr 2021 10:14:40 GMT

Hi ,

we can't read data from the console using sscanf . we can read data from one buffer to another buffer. Actually, I will enter commands on the console. so, I need to read the commands from the console .

Thanks & Regards,

Srinivas.

RE: how to use scanf in nrf5340 DK using nrf connect sdk

Håkon Alseth — Mon, 19 Apr 2021 07:07:48 GMT

Hi,

Try adding these configurations to any project, and start using sscanf() freely:

CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_NEWLIB_LIBC_FLOAT_SCANF=y
CONFIG_MAIN_STACK_SIZE=4096

But please be aware that the sscanf() implementation in newlib does not support 8 bit IO types, as described in this thread:

https://devzone.nordicsemi.com/f/nordic-q-a/72455/nrf9160---sscanf---length-field-hhi-hhu

Kind regards,

Håkon