topic Re: Illegal constant expression: copying address to a variable in CodeWarrior Development Tools

Illegal constant expression: copying address to a variable

amitdhand — Tue, 19 Feb 2019 15:34:57 GMT

I try to compile the below mentioned code in Code-warrior 10.7 but CW throws an error "illegal constant expression"

Code:

uint32_t val1;
uint32_t val2;
uint32_t val2 = (uint32_t)&val2; // Error is specified in this line

void main(void)
{

. // some code

}

The expression could work out with pointers but I am importing a code from IAR Embedded Workbench to Code-warrior and in IAR Embedded Workbench there is no such problem with such an expression.

Re: Illegal constant expression: copying address to a variable

Alice_Yang — Wed, 20 Feb 2019 04:02:42 GMT

Hello Amit Dhand ,

I test on my side , these code can work well on my side.

Which chip do you used ?

I recommend you create a new project, then copy and paste these code into it , build, check whether can work.

Have a great day,
TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

Re: Illegal constant expression: copying address to a variable

amitdhand — Wed, 20 Feb 2019 10:12:09 GMT

Thanks Alice_Yang for your prompt response on the query.

It is my mistake that I didn't recheck the code before posting. The problem still remains the same

Code:

uint32_t val1;
uint32_t val2 = (uint32_t)&val1; // Error is specified in this line: Illegal

void main(void)
{

. // some code

}

I am using MC9S12ZVCA192 chip for my project.

Screenshot from the CodeWarrior 10.7

Re: Illegal constant expression: copying address to a variable

Alice_Yang — Thu, 21 Feb 2019 09:59:09 GMT

Hello Amit,

The compilers are different ,how about use like below:

uint val1;
uint *val2 = &val1;

Have a great day,
TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!