IPC@CHIP Documentation - SC12 @CHIP-RTOS V1.10

This function always returns immediately. If no message is currently available, DX is non-zero and AX = -
28.
On success, a message from the highest priority non-empty FIFO mailbox is copied into the 12 byte store
at [ES:DI] and then this delivered message is removed from the mailbox.
Related Topics
Top of list
Index page
RTOS Message Exchange Manager
Interrupt 0xAD service 0x54: RTX_WAIT_MSG, Wait for a message
Parameters
AH
ES:DI
Wait up to a specified number of milliseconds for a message from a Message Exchange.
0x54
Pointer to user RTX_Wait_Msg type structure
Return Value
Comments
DX = 0 success AX: 0
DX != 0 failure AX: contains error code
The user must fill in the RTX_Wait_Msg structure prior to calling here.
On success, the highest priority message available on the exchange is copied into your message
container at location specified by the msg member of the RTX_Wait_Msg structure. Then the message
is removed from the Message Exchange.
Each caller to this API can specify their priority for access to messages. To wait in FIFO order, all callers
have to wait with the same priority.
Related Topics
Top of list
Index page
RTX_Wait_Msg type definition
RTOS Message Exchange Manager
Page 216 / 400