BECKHOFF ET9300 - Manual (Page 19)

Application Note ET9300 17
5.2.1 Generic
Prototype: UINT16 HW_Init(void)
Parameter void
Return 0 if initialization was successful
> 0 if error has occurred while initialization
Description Initializes the host controller, process data interface (PDI) and allocates
resources which are required for hardware access.
Prototype: void HW_Release(void)
Parameter void
Return void
Description Release allocated resources.
Prototype: UINT16 HW_GetALEventRegister(void)
Parameter void
Return Content of register 0x220-0x221
Description Get the first two bytes of the AL Event register (0x220-0x221).
Prototype: UINT16 HW_GetALEventRegister_Isr(void)
Parameter void
Return Content of register 0x220-0x221
Description This function should be implemented if a special function for ESC access from
interrupt service routines is required; otherwise this function is defined as
HW_GetALEventRegister.
Get the first two bytes of the AL Event register (0x220-0x221).
Prototype: void HW_ResetALEventMask(UINT16 intMask)
Parameter “intMask” Interrupt mask (disabled interrupt shall be zero)
Return void
Description Performs a logical AND with the AL Event Mask register (0x0204 : 0x0205).
This function is only required if “AL_EVENT_ENABLED” is set.
NOTE : This function is only required for SSC 5.10 or older.