Name

USB_MsgOp (SWI&55399) — Message operations

On Entry

R0

ValueDefinitionDescription
0USB_MSGOP_NONE 
1USB_MSGOP_REGISTER 
2USB_MSGOP_DEREGISTER 
3USB_MSGOP_FILTER 
4USB_MSGOP_FILTERALL 

R1Pointer to message handler
R2Parameter to message handler
R3Message class
R40 disable - 1 enable
R5 

On Exit

R0preserved
R1Error code Table A.1
R2, R3, R4, R5Preserved

Use

Related SWI's

USB_MsgSend (SWI&55398)