參數(shù)資料
型號: RX78K4
英文描述: 78K/IV Series Real-Time OS Fundamental | User's Manual[01/1997]
中文描述: 78K/IV系列實(shí)時(shí)操作系統(tǒng)的基本|用戶手冊[01/1997]
文件頁數(shù): 62/96頁
文件大?。?/td> 265K
代理商: RX78K4
CHAPTER 4 RX78K/IV SYSTEM CALL LIST
53
4.2.11 rcv_msg (Receive Message from Mailbox)
[Function]
Waits for reception from a mail box.
[Remarks]
Receives a message from a mail box indicated by mbxid and sets the top address of the received message in
an address specified by the parameter. If the message has not arrived at the mail box, the task that has
issued this system call is placed in the WAIT state. The area for ppk-msg should be allocated by the user.
Received message becomes a top address of the message area actual data is stored.
[System call ID number]
rcv_msg = 20
[Parameter]
mbxid (Mailbox Identifier)
Mail box ID (Mailbox top address)
- 24 bits (large model)
- 16 bits (small model)
- 24 bits (large model)
- 16 bits (small model)
ppk_msg (Pointer of Message Packet)
Address of area storing the top
address of received message
[Return parameter]
E_OK
Normal termination
[Assembler format]
[Large model]
MOV
MOVW
MOV
MOVG
PUSH
CALLT
[Small model]
MOV
MOVW
MOVW
PUSH
CALLT
bnk0_b, #20
bnk0_up, #mbxid
bnk0_d, #mbxid
VVP, #ppk_msg
VVP
[40H]
:
bnk0_b, #20
bnk0_up, #mbxid
AX, #ppk_msg
AX
[40H]
:
C register = return parameter
C register = return parameter
[C format]
ret = rcv_msg (ppk_msg,mbxid);
char
**ppk_msg;
char
*mbxid;
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