How to interpret the "Expressions" of Arrays in Debug mode of CubeIDE?

[A.D.]

I can't really see how the "Expression" window in the STM32CubeIDE in Debug mode is interpreting arrays.

I have an array "receiveData" with 7 uint8_t elements that I receive via UART.

When I check out this array under "Expressions" I see that the array has 7 elements, just as expected. But while the value is != 0, all array elements are shown with value 0! I would have expected the first to Hex-digits from "value" belonging to element 0, the next two digits to element 1 and so on.

And in the detailed window at the bottom of the screenshot it only shows 6 times "\0" under details, not 7 times.

So my two questions are:

• Why are all elements 0, while the value of the array in general is != 0?
• Why is the "Details" parameter showing less elements than the array actually has?

 

[TDK · Accepted solution]

The Value for receiveData is the address of the array, not the values within the array.

It has 7 elements, which matches the definition. The first element is index 0.

[A.D.]

Oh right, it is the address, that makes sense.

But still, under "details" it does show only 6 elements, not 7.

[TDK]

Looks like it's interpreting it as a string and leaving off the terminating null character, but including null characters "within" the string. Who knows.

[A.D.]

I guess that makes sense. OK, thanks for the quick answers!

[Breno Nascimento Santos]

help some project on git u-blox NUCLEO-64 STM32L476RG

[Breno Nascimento Santos]

some project on git u-blox NUCLEO-64 STM32L476RG