How to declare a string

RE: How to declare a string

Simon — Thu, 27 Feb 2020 15:53:47 GMT

That is strange. Could you try to do the same in a really simple example, E.g. add those lines to examples\peripheral\temperature and check if the result is similar. If it still doesn't work, could you try to build the example using another compiler/IDE. E.g. try opening \examples\peripheral\temperature\pca10056\blank\armgcc and run these commands:

make
make flash

Open Termite and check the result.

RE: How to declare a string

Rick Z — Thu, 27 Feb 2020 15:27:06 GMT

The result back in log is as follow

<info> app: Playing PLAYLIST
<info> app: test 1
<info> app: I2S loopback example started.

next to test 1 is a weird character

    char line[4]= {0x48, 0x45, 0x59, NULL}; /* Line buffer */
    NRF_LOG_INFO("test 1 %s", line);

RE: How to declare a string

Simon — Thu, 27 Feb 2020 14:55:19 GMT

Can you provide your whole code? Or at least the source (.c) file where you assign values to line[].

RE: How to declare a string

Rick Z — Thu, 27 Feb 2020 14:46:21 GMT

Same as example i provided above which is essentially the same thing in your example

RE: How to declare a string

Rick Z — Thu, 27 Feb 2020 14:45:33 GMT

Unfortunately it does not print this but instead a garbage character is printed

RE: How to declare a string

Simon — Wed, 26 Feb 2020 16:44:23 GMT

[quote user=""]NRF_LOG_INFO("Playlist : %s", line); does not work displaying the 13 character as a string[/quote]

If you use the placeholder %s, it will log all the bytes from the given address until it hits a NULL character. E.g the following (the characters are written as ASCII, convert it using http://www.asciitable.com/):

char line[4]= {0x48, 0x45, 0x59, NULL}; /* Line buffer */
NRF_LOG_INFO("%s", line);

Will print:

<info> app: HEY

If you have a NULL character in the middle of the string, it will only print the characters up to that point.

Best regards,

Simon