18.2.6 Synchronization and communication functions (mailboxes)

The following shows the service calls provided by the RI600V4 as the synchronization and communication functions (mailboxes).

Table 18-8 Synchronization and Communication Functions (Mailboxes)

Service Call	Function	Useful Range
snd_mbx	Send to mailbox	Task
isnd_mbx	Send to mailbox	Non-task
rcv_mbx	Receive from mailbox (waiting forever)	Task
prcv_mbx	Receive from mailbox (polling)	Task
iprcv_mbx	Receive from mailbox (polling)	Non-task
trcv_mbx	Receive from mailbox (with time-out)	Task
ref_mbx	Reference mailbox state	Task
iref_mbx	Reference mailbox state	Non-task