Option to not have a GPIO port typecasted to a pointer

[unsigned_char_array]

Split from Inconsistent pin naming - this is a separate suggestion.

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I would like the option to have the define of a particular GPIO port, or all defines, not typecasted to a pointer. So only the base address as an uint32_t (or uintptr_t). This would make using it in C++ in constexpr easier. Because reinterpret_cast and pointer comparison is not allowed in a constant expression. This should be an additional define for backwards compatibility. 

 

#define CLK_A_GPIO_PIN GPIO_PIN_0
#define CLK_A_GPIO_PORT GPIOF
#define CLK_A_GPIO_PORT_BASE GPIOF_BASE // <- for use in constexpr

 

In C++ it would be much easier to do things at compile time using templates and constexpr this way. Example:

• you want to create a function at compile time that sets 2 defined pins high
• if they are the same port they can be combined in one call to GPIO_set()
• if they are not the same port they need to be separate calls
• no macros needed in user code, no runtime checks needed, no manual tweaks needed, just optimal code for a specific pinout

 

[Ghofrane GSOURI]

Hello @unsigned_char_array 

A change request #0060932  has been raised to dev team for feasibility check.

I will keep you posted with updates.

THX

Ghofrane