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Indexer not finding symbol 'SCB->CCR' [message #1828415]

Tue, 09 June 2020 08:33

Eclipse User

I have some ARM M7 code which is looking at the CCR register

SCB->CCR to be specific. The indexer says it can not find CCR
"Field 'CCR' could not be resolved"

I can click on CCR and "Open Definition" and it does open the correct definition.

Does anyone have an idea why it is messing up on the SCB structure?

Thanks
Trampas

Re: Indexer not finding symbol 'SCB->CCR' [message #1828501 is a reply to message #1828415]

Thu, 11 June 2020 01:37

Eclipse User

Can't say since there's not enough information.
There are any number of reasons why.

Are you using a plugin?

Lacking any further info some common tactics:

Digging through the Parser log may reveal the reason.
Rebuilding the index might work.
Turning off heuristic resolution of includes might help.
Changing the build configuration option (default vs. fixed) might also.
Is it maybe a CODAN error (usually has a bug icon)?

Can you provide a small example that others can use to replicate the problem?
Since we don't have your project files to look at you are pretty much on your own.

Re: Indexer not finding symbol 'SCB->CCR' [message #1828522 is a reply to message #1828501]

Thu, 11 June 2020 06:40

Eclipse User

I guess I should be asking if there is a way to debug this? For example you mention the parser log, how do I access that.

Thanks
Trampas

Re: Indexer not finding symbol 'SCB->CCR' [message #1828523 is a reply to message #1828501]

Thu, 11 June 2020 06:46

Eclipse User

The OP has not told it, but I guess that he's attempting to see a register structure definition in the chip manufacturer's headers.

Guessing some more, it seems to be from the STM hardware code headers. The headers attempt to attack all the manufacturer's chips at once, and the resulting jungle is a maze of conditional code. The OP probably does not have all the necessary symbols defined for the indexer.

I solved the problem by jettisoning both Atmel's and STM's code and by writing my own hardware structure definitions and driver code. Eclipse behaves correctly with them.

Re: Indexer not finding symbol 'SCB->CCR' [message #1828524 is a reply to message #1828522]

Thu, 11 June 2020 06:55

Eclipse User

OK I found the bug...

When the SCB register is defined as this it works
#define SCB ((SCB_Type *) 0xE000ED00UL ) /*!< SCB configuration struct */

When it is defined like this it does not work
#define SCS_BASE (0xE000E000UL) /*!< System Control Space Base Address */
#define ITM_BASE (0xE0000000UL) /*!< ITM Base Address */
#define DWT_BASE (0xE0001000UL) /*!< DWT Base Address */
#define TPI_BASE (0xE0040000UL) /*!< TPI Base Address */
#define CoreDebug_BASE (0xE000EDF0UL) /*!< Core Debug Base Address */
#define SysTick_BASE (SCS_BASE + 0x0010UL) /*!< SysTick Base Address */
#define NVIC_BASE (SCS_BASE + 0x0100UL) /*!< NVIC Base Address */
#define SCB_BASE (SCS_BASE + 0x0D00UL) /*!< System Control Block Base Address */

#define SCnSCB ((SCnSCB_Type *) SCS_BASE ) /*!< System control Register not in SCB */
#define SCB ((SCB_Type *) SCB_BASE ) /*!< SCB configuration struct */

Thanks
Trampas

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