VersaLogic STD32 VL-1225, Справочное руководство

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VL-1225/6 Analog Input/Output Board
6-3
0012 read:
0012 C7 06 0002 R 0000 mov done,0 ;Clear done flag
0018 BA 0303 mov dx,select ;Select channel 0 and Trigger
001B B0 00 mov al,00h
001D EE out dx,al
;Unrelated CPU code can be
;executed here. The VL-1225/6
;requires 40 microseconds to
;complete an A/D conversion.
001E 83 3E 0002 R FF dcheck: cmp done,0ffffh ;Wait here until the ISR executes
0023 75 F9 jnz dcheck
0025 valid: ;The variable ‘value’ now contains
;valid A/D data.
0025 EB FE stop: jmp stop ;Rest of mainline goes here
0027
init_188:
;VL-188 INTERRUPT INITIALIZATION
0027 BA FF3A mov dx,int1 ;INT1 CONTROL REGISTER
002A B8 0017 mov ax,0017h ;D15 0 — = Non Functional Bit
002D EF out dx,ax ;D14 0 — = Non Functional Bit
;D13 0 — = Non Functional Bit
;D12 0 — = Non Functional Bit
;D11 0 — = Non Functional Bit
;D10 0 — = Non Functional Bit
;D9 0 — = Non Functional Bit
;D8 0 — = Non Functional Bit
;D7 0 — = Non Functional Bit
;D6 0 SFNM = Normal
;D5 0 C = Non Cascade
;D4 1 LTM = Level Trigger
;D3 0 MSK = Non masked
;D2 1 PR2 = Priority 7
;D1 1 PR1 = Priority 7
;D0 1 PR0 = Priority 7
;Un-mask STD Bus INTRQ* interrupts
;and set to non-cascade mode because
;VL-1225/6 does not provide interrupt
;vector. CPU will internally
;generate type code 13.
002E B8 ---- R mov ax,vector ;Install service routine address
0031 8E D8 mov ds,ax ;into CPU Interrupt Vector Table
assume ds:vector
0033 C7 06 0034 R 004C R mov word ptr vec[0],offset isr
0039 C7 06 0036 R ---- R mov word ptr vec[2],seg isr
assume ds:data
003F B8 ---- R mov ax,data
0042 8E D8 mov ds,ax
0044 C3 ret
0045
init_1225:
;VL-1225/6 INTERRUPT INITIALIZATION
0045 B0 01 mov al,01h ;CONTROL REGISTER
0047 BA 0300 mov dx,ictrl ;D7 0 — = Non Functional Bit
004A EE out dx,al ;D6 0 — = Non Functional Bit
004B C3 ret ;D5 0 — = Non Functional Bit
;D4 0 — = Non Functional Bit
;D3 0 — = Non Functional Bit
;D2 0 — = Non Functional Bit
;D1 0 — = Non Functional Bit
;D0 1 IE = Interrupt Enable
Software Examples – Interrupt Mode Analog Input