How To Access Registers - Hitachi EH-150 Applications Manual

8.3

How to access registers

You use the dedicated commands (FUN201 for EH-CPUs, SCRW for EHV-CPUs) to access EH-ETH2
register. The notation of these commands specification and the usage for this module are described here.
Format FUN 201 ( s )
Parameter Starting I/O No. of the s parameter area
Function These are the commands to access registers.
- This is the command to read or write Status and Control Register between CPU module and this module.
- The control type supported by this command is only "With hand shaking" for writing. Don't specify and execute "Without hand
shaking" for writing.
- When Status Register is read, select the control type "With hand shaking" or "Without hand shaking". ("Without hand shaking" is
recommended.)
The description of s parameter area
s + 0 (1) Return code
s + 1 (2) System area
s + 2 (Not be allowed to use by user)
s + 3 (3) Control type
s + 4 (4) The start of the area
s + 5 (5) Control bit I/O No. of starting sending or
receiving
s + 6 (6) Starting I/O No. of Destination (or Source)
s + 7 (7) Size
The description of control bit table for writing or reading.
+ 0 (8) Starting execution flag
+ 1 (9) The completion flag without error
+ 2 (10) The completion flag with error
The description of the frame
The area should be set by user
The area inhibited to set by user
(8) Starting execution flag
When to start sending or receiving with FUN201 command,
please set "1" by user program.
This bit will be reset by system execution when the sending
or receiving is completed.
(9) The completion flag without error
This bit will be set to "1" when the sending or receiving by
FUN201 command is completed without error. This will be
reset by system when FUN201 start to execution.
(10) The completion flag with error
This bit will be set to "1" when the sending or receiving by
FUN201 command is completed with error. This will be
reset by system when FUN201 start to execution.
FUN201 command
(1) Return code
The execution result of FUN201 command is set.
Completed without error -> = H0000
Completed with error -> != H0000
(2) System area
This area is used by system execution when FUN201
command is executed. Don't use this area by user.
(3) Control type
H0001: The request to get value from Status Register ("With
hand shaking" is supported.)
H0002: The request to get value from Status Register
("Without hand shaking" is supported.)
H0003: The request to put value to Control Register.
HA55A: Request to software reset.
Please don't set up any values other than the above.
(4) The start of the area
b15
Unit No.
Unit No.: Always "0" is required
Slot No. : Following value is required.
[For EH-CPU516/548] One of 0 to 7.
[For other EH-CPUs] One of 0 to 2.
The position of word:
[When control type is selected H0001 or H0003]
Always "H00" is required
[When control type is selected H0002]
Always "H2F" is required
(5) Control bit I/O No. of starting sending or receiving
The actual address value of R, L and M which has the
starting I/O No. of the sending or receiving control bit area
should be set using ADRIO command.
(6) Starting I/O No. of Destination (or Source)
The actual address value of WR, WL and WM which has the
starting I/O No. of the source or destination area should be
set using ADRIO command.
(7) Size
The size of using area for sending or receiving should be set.
For this module, maximum size is 55 words.
8-13
Chapter 8 Register Structure
b11 b7
Slot No. The position of word
b0