Problem using snprintf() in static thread

[nikhil]

Hello,

I am using MMC SPI to log float values to microSD card using STM32F4 MCU and Chibios 2.6.5.
I have mostly followed demo from chibios. I am using snprintf() function to convert float to string and then write them file.
This method works perfectly when I call write function from main thread. However when I call this write function from any other static thread, I get 0 and -268156 values written on SD card and none of expected value.
I have added syscall.c to makefile.
Am I missing something? Is there any difference in the execution of main thread and any other static thread?

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Nikhil

[Giovanni]

Probably a stack overflow, libraries are not exactly designed for embedded.

Giovanni

[nikhil]

Any suggestion for alternate solution to this issue?

[Giovanni]

Use chsnprintf()?

Giovanni

[nikhil]

Tried using chsnprintf() but it also gives 214748368s and 0s instead of desired values.


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Nikhil

[Giovanni]

You are looking for the wrong thing then.

Giovanni