LTC1407A-1 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC1407A-1 Datasheet PDF : 24 Pages
| |||
LTC1407-1/LTC1407A-1
APPLICATIO S I FOR ATIO
; 12-03-03 ******************************************************************
; Files: 014SIAB.ASM -> 1407A Sine wave collection with Serial Port interface
;
bvectors.asm
both channels collected in sequence in the same 2k record.
;
s2k14ini.asm
Buffered mode 2k buffer size.
; First element at 1024, last element at 1023, two middles at 2047 and 0000
; bipolar mode
; Works 16 or 64 clock frames.
; negative edge BCLKR
; negative BFSR pulse
; -0 data shifted
; ***************************************************************************
.width 160
.length 110
.title “sineb0 BSP in auto buffer mode”
.mmregs
.setsect “.text”, 0x500,0 ;Set address of executable
.setsect “vectors”, 0x180,0 ;Set address of incoming 1403 data
.setsect “buffer”, 0x800,0 ;Set address of BSP buffer for clearing
.setsect “result”, 0x1800,0 ;Set address of result for clearing
.text
;.text marks start of code
start:
tim=#0fh
prd=#0fh
tcr = #10h
tspc = #0h
pmst = #01a0h
sp = #0700h
dp = #0
ar2 = #1800h
ar3 = #0800h
ar4 = #0h
call sineinit
sinepeek:
call sineinit
wait goto wait
;this label seems necessary
;Make sure /PWRDWN is low at J1-9
;to turn off AC01 adc
; stop timer
; stop TDM serial port to AC01
; set up iptr. Processor Mode STatus register
; init stack pointer.
; data page
; pointer to computed receive buffer.
; pointer to Buffered Serial Port receive buffer
; reset record counter
; Double clutch the initialization to insure a proper
; reset. The external frame sync must occur 2.5 clocks
; or more after the port comes out of reset.
;
————————Buffered Receive Interrupt Routine —————————
breceive:
ifr = #10h
; clear interrupt flags
TC = bitf(@BSPCE,#4000h) ; check which half (bspce(bit14)) of buffer
if (NTC) goto bufull
; if this still the first half get next half
bspce = #(2023h + 08000h); turn on halt for second half (bspce(bit15))
return_enable
14071f
18
Share Link: 