Understanding of STM32 pointers

Definition of pointer:

I conclude that a pointer is a variable used to store the address of a variable of a certain type.

         For example, unit8 * p = 0x5555 5555

      Pointer p represents the variable used to store the address of the unit8 type variable

      *Pointers are variables

      *Pointers are variables that store addresses

      *A pointer is a variable that stores the address of a variable of a certain type

Baidu defines it as:

  Its value directly points to a value stored in another place in the computer's memory.

      In the above example, *p means the number stored at the address 0x5555 5555.

Pointer definition format: (data type + asterisk) + variable name    

       For example, the following two examples

       int * xxx

       YYY*xxx 

The meaning of pointer: At this time, the variable xxx becomes a pointer, which points to the first address of this data type.

Use of pointers:

                     typedef struct {

                                        __IO uint32_t AAA;

                                        __IO uint32_t BBB;

                                         __IO uint32_t CCC;

                                         __IO uint32_t DDD; } YYY; Let’s use a structure to illustrate

     YYY->AAA means the content stored in variable AAA

      Same thing with YYY.AAA, different ways of expressing it

Precautions:

In STM32, pointers are incremented by 4 bytes, for example, a pointer is 0x4001 2000

         No matter what number is in it, the next pointer is 0x4001 2004         

for example  

uint8 i[5] = {0X11,OX22,OX33,OX44,OX55}

&i = 0X4001 2000

Then i[0] = *0X4001 2000

       i[1] = *0X4001 2004

        i[2] = *0X4001 2008

         i[3] = *0X4001 200C

          i[4] = *0X4001 2010

0x4001 2001~0x4001 2003 are empty.