FabiaTech FX5328, Руководство пользователя

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FabiaTech Corporation
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Watchdog Timer Enabled
To enable the watchdog timer, you have to output a byte of timer factor to the
watchdog register whose address is 2eh and data port is 2fH. The following is a
demo program, which demonstrates how to enable the watchdog timer and set
the time-out period at 20 seconds.
;--------------------------------------------------------------------------------------------
; Enter the extended function mode, interruptible double-write
;--------------------------------------------------------------------------------------------
outportb (0x2e,0x87); // Enter to extended function mode
outportb(0x2e,0x87);
outportb(0x2e,0x07); // Select register index 0x07
;-----------------------------------------------------------------------------------------------------------------------
; Logical device 8,configuration WD IO Port 308H register, CR60 Bit1,2,CR61 Bit0~7
;-----------------------------------------------------------------------------------------------------------------------
outportb(0x2e,0x08); //Select LDN 8
outportb(0x2e,0x60); // Select LDN 8 register index 0x60
outportb(0x2f,0x03); // Set Watch Dog timer base address high byte to 0x03h
outportb(0x2e,0x61); // Select LDN 8 register index 0x61
outportb(0x2f,0x08); // Set Watch Dog timer base address high byte to 0x08h
-------------------------------------------------------------------------------------------------------------------------
; Logical device 8, configuration register,CR30 Bit0,Enable Watch Dog Timer Device
;------------------------------------------------------------------------------------------------------------------------
outportb(0x2e,0x30); // Select LDN 8 register index 0x30
outportb(0x2f,0x01); // Enable Watch Dog Timer Device
//outportb(0x2f,0x00); // Disable Watch Dog Timer Device
;--------------------------------------------
; Exit extended function mode
;--------------------------------------------
outportb(0x2e,0x00);
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