GPIO HAL pointer at function argument

[StanCosgrove]

Hi, i m reading the general HAL GPIO file, what does the 2 pointers here do? can anyone kindly advise? i see a lot of STM header and device file with these... 

void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
{
uint32_t position = 0x00U;
uint32_t iocurrent;
uint32_t temp;

EXTI_Core_TypeDef *EXTI_CurrentCPU;

#if defined(DUAL_CORE) && defined(CORE_CM4)

EXTI_CurrentCPU = EXTI_D2; /* EXTI for CM4 CPU */

#else
EXTI_CurrentCPU = EXTI_D1; /* EXTI for CM7 CPU */
#endif

.....

[TDK]

GPIOx is a pointer to the GPIO port, e.g. GPIOA.

GPIO_Init is a pointer to the initialization structure, which holds in the information on which pins you want configured and how to configure them.

 

[Pavel A.]

Why you don't ask what is EXTI_Core? :)

[StanCosgrove]

yes, i would like to know whats  EXTI_Core and EXTI_CurrentCPU too...Anyone can kinldy advise?

[TDK]

Pretty sure he was joking...

You can look up these things on your own. Function definitions, structures, HAL examples all exist.

[Pavel A.]

Thank you Tim :)