Use uint8_t in Kconfig.projbuild

[Saskia]

I want to use the Kconfig.projbuild file, there should be a parameter as uint8_t. But this is not possible, only int (or string).

this is working

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config mac
    string "mac"
	default "{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}"

but i want to use this as uint8_t. Int is not working with this syntax. "You have made an invalid entry."

String is the only datatype working. Is it possible to cast this into uint8_t?

[Saskia]

No one?

[loboris]

Parameters in Kconfig.projbuild are constants, if you need you can limit the range

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    config MY_CONFIG_OPTION
        int "My config option"
        range 0 255
        default 64
        help
        Enter the valu which wil be assigned to uint8_t variable

Then use it in your code

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#include sdkconfig.h

uint8_t myvalue = CONFIG_MY_CONFIG_OPTION
....

kconfig-language

[WiFive]

Right but he wants to do a Mac address so he would have to do a different entry for each octet (type hex) which seems to be the most common method. Or use a string and then convert the string to a byte array. What is the best way to do that at compile time?

[Saskia]

Yeah, i convert it to a byte array, thanks. But i have another problem. I can't get access to this String in my main.c:

My Kconfig.projbuild looks like this

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menu "Settings"

config MAC
    string "mac"
    default "AAAAAAAAAAAA"
    help
        Enter a value

my library "settings.h" looks like this

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#ifndef settings_h
#define settings_h

#define MAC CONFIG_MAC

#endif

At this pont, i get this error

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error: 'MAC' was not declared in this scope

hwo can i link MAC to a variable, which i can use in main.c (for examle CONFIG_MAC)?

[rudi ;-)]

my library "settings.h" looks like this

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#ifndef settings_h
#define settings_h

#define MAC CONFIG_MAC

#endif

At this pont, i get this error

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error: 'MAC' was not declared in this scope

hwo can i link MAC to a variable, which i can use in main.c (for examle CONFIG_MAC)?

where is your library file named "settings.h" `?
is this in a include folder?
have you include this file where you define MAC in the main.c

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#include  "settings.h"

usually is this done by include the config like boris you suggest

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#include sdkconfig.h

uint8_t myvalue = CONFIG_MY_CONFIG_OPTION
....

so you must be sure that you have your own defines and configs included in your code and in your makefile if have different custom code - cause the linker does not know, where you have your settings.h so you must say him where he find your customs defines.

hope this helps

best wishes
rudi