Omron 3G8F7-CRM21, User Manual

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65
Board Hardware Error Notification
Section 5-6
[Disabling the PC Watchdog Timer]
[Refreshing the PC Watchdog Timer]
The PC Watchdog Timer must be refreshed within the certain time interval set
in the Timer.
5-6 Board Hardware Error Notification
The Board Hardware Error Notification is intended to notify the user
application of an operation stop due to a hardware error on the CompoNet
Master Board.
[Initial process]
Step Operation procedure Access to Shared Memory
1. Set the command
SET_PC_WDT. Set the time-out value for CompoNet Master Board in the
Command area (PC
→
BD) (0x3200) to 0. This is used to
set the command SET_PC_WDT.
2. Notify that the command
is set. Set the CMD flag of the Interrupt Trigger register (0x0002)
to 1.
3. Confirm that the
command set has been
notified. Confirm the CMD flag of the Interrupt Request
Confirmation register (0x0003) changes to 0.
4. Wait for a command
acknowledgment. Confirm the CMD_ACK flag of the Interrupt Request
Indication register (0x0005) changes to 1. (Confirm it by
an interrupt or by polling.)
5. Read the command
response SET_PC_WDT. The command response SET_PC_WDT form CompoNet
Master Board is stored in Command (BD
→
PC)
(0x3210). Read it.
6. Release the command
acknowledgment
interrupt. Set the CMD_ACK flag of the Interrupt Clear register
(0x0006) to 1, to clear the interrupt cause.
Step Operation procedure Access to Shared Memory
1. Set the PC_WDT
interrupt. Set the PC_WDT flag of the Interrupt Trigger register
(0x0002) to 1.
2. Confirm that the interrupt
completes.(This step can
be skipped without
causing a problem.) Confirm the PC_WDT flag of interrupt Request
Confirmation register (0x0003) changes to 0.
Step Operation procedure Access to Shared Memory
1. Set the Interrupt Mask. Set the BD_WDT of the Interrupt Mask register (0x0004)
to 1.
(Set it to 0 when the BD_WDT is confirmed by polling
periodically.)