# Pragma usage (1) # pragma startup and # pragma exit

Recently I am studying # pragma usage. Now I have recorded two notes as follows.

 

(1) usage:

# Pragma startup function-name <priority> <br/> # pragma exit function-name <priority> 

Meaning:

The first Pragma indicates that the function named function-name is called before the main function is called.

The second Pragma indicatesProgramBefore exiting through _ exit, call the function named function-name.

However, the function-name must be a function that does not carry parameters and does not return values, that is:

 

Void func (void );

 

(2) Priority of optional

This priority is optional, but it must be within the Closed range [64,255. [1, 63] the priority of this interval is used for the ISO startup and shutdown mechanisms. do not define the priority within this interval. If no priority is set, the default value is 100.