Maxim Integrated 78M6612 M-API Library - Manual (Page 33)

UG_6612_036 78M6612 M-API Library User Guide
Rev. 1.00 33
4.5.2 MAPI_RelayControl ()
Purpose Turning Relay ON/OFF (close/open circuit) on all channels.
Synopsis void MAPI_RelayControl( IN unsigned char Channels);
Parameters Channels Input parameter.
Each bit indicates turning ON(1) or OFF(0). The bit’s position
represents the specific channel/outlet number. For example:
0x01h – Turn relay ON on channel 1/A. Turn relays OFF on channel 2/B.
0x02h – Turn relay ON on channel 2/B. Turn relays OFF on channel 1/A.
Both channels can be turned ON with a single call to this API by setting 1 at the
bits representing the channels. For example:
0x03h – Turn relay ON on both channels.
Note: in the library code, channel 1 relay is mapped to DIO7 and channel 2 to
DIO19. But all other evaluation boards (6612, 6613, etc) are setup such that
DIO19 to TP4 and DIO7 is grounded. This means relay control doesn’t mean
much since only DIO19 would be suitable to be controlled in this case but since
there is only one channel, there is no point of having a control.
Return Codes None.
4.5.3 MAPI_CloseCircuit_0X()
Purpose Get zero-crossing status when positioning from open circuit to close circuit. The
value returned TRUE/FALSE indicates whether Voltage
zero-crossing has
occurred. The usage of this API is intended to be for when the circuit is
transitioning from open to close. This API uses the hardware Timer 1 in the case
when zero crossing does not take place. A delay of 12ms is set for such break.
Synopsis bool MAPI_CloseCircuit_0X( void );
Parameters
None.
Return Codes TRUE – Zero crossing occurs.
FALSE – Zero crossing does not occur.
4.5.4 MAPI_OpenCircuit_0X()
Purpose Get zero-crossing status when transitioning from close circuit to open circuit.
The value returned TRUE/FALSE indicates whether Current
zero-crossing has
occurred for a specific channel. There is no indication of either direction
(falling/rising). The usage of this API is intended to be for when the circuit is
transitioning from close to open. This API uses the hardware Timer 1 in the case
when zero crossing does not take place. A delay of 10ms is set for such break.
Synopsis bool MAPI_OpenCircuit_0X( unsigned char Channel );
Parameters Channel Input parameter.
Channel/outlet number (1 or 2) where zero crossing will be
detected.
Return Codes TRUE – Zero crossing occurs.
FALSE – Zero crossing does not occur.