參數(shù)資料
型號: LTC1402
廠商: Linear Technology Corporation
英文描述: Serial 12-Bit, 2.2Msps Sampling ADC with Shutdown(串行12位,2.2Msps 采樣模數(shù)轉(zhuǎn)換器(帶關(guān)斷))
中文描述: 串行12位,2.2Msps采樣ADC(串行12位,2.2Msps采樣模數(shù)轉(zhuǎn)換器(帶關(guān)斷)與關(guān)斷)
文件頁數(shù): 20/24頁
文件大?。?/td> 280K
代理商: LTC1402
20
LTC1402
APPLICATIO
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* This is an example of how to initialize the Buffered Serial Port (BSP).
* The BSP is initialized to require an external CLK and FSX for
* operation. The data format is 16-bits, burst mode, with autobuffering
* enabled.
*
*
*****************************************************************************************************
*Timing at BSP pins in DSKPLUS TMS320c542 board with inverters at BCLKR and BFSR.
*BFSR Pin JP1-20 ~\___/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\___/~~~~~~~~~~*
*BCLKR Pin JP1-14 _/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/~\_/
*BDR Pin JP1-26 -_—_—<REF-B11-B10-B09-B08-B07-B06-B05-B04-B03-B02-B01-B00>—_—_—<REF-B11-
*CLKIN Pin JP5-09 ~~~~~\_______/~~~~~~~\_______/~~~~~~~\_______/~~~~~~~\_______/~~~~~~~\_______/~~~~ *
*
*A 2 place right shift is needed to right justify the input data.
*The REF bit is also be masked in this example
*****************************************************************************************************
*
Loopback
.set NO
;(digital looback mode)
Format
.set BIT_16
;(Data format 16,12,10,8)
IntSync
.set NO
;(internal Frame syncs generated)
IntCLK
.set NO
;(internal clks generated)
BurstMode
.set YES
;(if BurstMode=NO, then Continuous)
CLKDIV
.set 3
;(3=default value, 1/4 CLOCKOUT)
PCM_Mode .set NO
;(Turn on PCM mode)
FS_polarity
.set NO
;(change polarity)YES=^^^\_/^^^, NO=___/^\___
CLK_polarity .set YES
;(change polarity)for BCLKR YES=_/^, NO=~\_
Frame_ignore .set !YES
;(inverted !YES -ignores frame)
XMTautobuf .set NO
;(transmit autobuffering)
RCVautobuf
.set YES
;(receive autobuffering)
XMThalt
.set NO
;(transmit buff halt if XMT buff is full)
RCVhalt
.set NO
;(receive buff halt if RCV buff is full)
XMTbufAddr .set 0x800
;(address of transmit buffer)
XMTbufSize
.set 0x000
;(length of transmit buffer)
RCVbufAddr
.set 0x800
;(address of receive buffer)
RCVbufSize
.set 0x800
;(length of receive buffer)works up to 800
*
*
*
**********************************************************************
.eval ((Loopback >> 1)|((Format & 2)<<1)|(BurstMode <<3)|(IntCLK <<4)|(IntSync <<5)) ,SPCval
.eval ((CLKDIV)|(FS_polarity <<5)|(CLK_polarity<<6)|((Format & 1)<<7)|(Frame_ignore<<8)|(PCM_Mode<<9)), SPCEval
.eval (SPCEval|(XMTautobuf<<10)|(XMThalt<<12)|(RCVautobuf<<13)|(RCVhalt<<15)), SPCEval
sineinit:
bspc = #SPCval
; places buffered serial port in reset
ifr = #10h
; clear interrupt flags
imr = #210h
; Enable HPINT,enable BRINT0
intm = 0
; all unmasked interrupts are enabled.
bspce = #SPCEval
; programs BSPCE and ABU
axr = #XMTbufAddr
; initializes transmit buffer start address
bkx = #XMTbufSize
; initializes transmit buffer size
arr = #RCVbufAddr
; initializes receive buffer start address
bkr = #RCVbufSize
; initializes receive buffer size
bspc = #(SPCval | GO)
; bring buffered serial port out of reset
return
;for transmit and receive because GO=0xC0
.space 16*32
;clear a chunk at the end to mark the end
;======================================================================
;
; VECTORS
;
;======================================================================
.sect “vectors”
;The vectors start here
;get BSP vectors
; ***************************************************************************
;
Vector Table for the ‘C54x DSKplus
;
BSP vectors and Debugger vectors
;
TDM vectors just return
; ***************************************************************************
*
*
*
*
*
*
DLB bit
FO bit
TXM bit
MCM bit
FSM bit
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