topic Re: MCUXpresso SDK sprintf function in MCUXpresso SDK

MCUXpresso SDK sprintf function

kk7xo — Wed, 16 Mar 2022 19:22:19 GMT

I'm using the SDK for the LPCXpresso845MAX board I would like to use sprintf() but I see that it is not included in the SDK. I see that in your devices/LPC845/utilities/debug_console_lite directory you have a files named fsl_debug_console.c/h. I like using this driver because it provides a printf() function I can use with my UART.

However, I notice that you declare DbgConsole_PrintfFormattedData() (line 605 in my copy) as static, which means I cannot access it from outside the file. This is unfortunate because I could easily use that function to create a sprintf() by passing in a pointer to a function that writes to a character string.

Since I cannot do that and I do not want to alter my copy of the SDK, I am forced to include the libnano version of sprintf(), which drags in a bunch of unwanted library functions such as malloc() and free() that compete with my own versions.

I would ask that you make DbgConsole_PrintfFormattedData() non-static in future versions of the SDK so we can access its functionality from our code without modifying the SDK files themselves.

Regards,

Albert

Re: MCUXpresso SDK sprintf function

Alice_Yang — Thu, 17 Mar 2022 08:13:54 GMT

Hello Albert,

Thanks for your sharing.

Just kindly reminder, you can create PRINTF by Config Tool:

Alice

Re: MCUXpresso SDK sprintf function

kk7xo — Thu, 17 Mar 2022 18:05:03 GMT

Yes I realize I can get printf. It's sprintf that I'm looking for.

I don't want to edit my copy of fsl_debug_console.c/h to make the necessary function accessible externally, otherwise my changes will get overwritten whenever I update my copy of the SDK.

Re: MCUXpresso SDK sprintf function

Alice_Yang — Fri, 18 Mar 2022 02:49:46 GMT

Hello,

OK, I know your meaning, and will submit request to SDK team, thanks for your suggestion.

Alice