1.34.22.12 SYSTICK_TimerCallbackSet Function
C
void SYSTICK_TimerCallbackSet ( SYSTICK_CALLBACK callback, uintptr_t context )
Summary
Sets the pointer to the function (and it's context) to be called when the given systick reaches 0.
Description
This function sets the pointer to a client function to be called "back" when systick reaches 0. It also passes a context value (usually a pointer to a context structure) that is passed into the function when it is called.
This function is available only in interrupt or non-blocking mode of operation.
Precondition
SYSTICK_Initialize must have been called for the associated USART instance.
Parameters
| Param | Description |
|---|---|
| callback | A pointer to a function with a calling signature defined by the SYSTICK_CALLBACK data type. |
| context | A value (usually a pointer) passed (unused) into the function identified by the callback parameter. |
Returns
None.
Example
ticks = 0;
void AppCallback ( uintptr_t context )
{
ticks++;
}
SYSTICK_TimerCallbackSet(AppCallback, (uintptr_t) NULL);
Remarks
The context parameter is ignored if the pointer passed is NULL. To disable the callback function, pass a NULL for the callback parameter.