參數(shù)資料
型號: QSMRM
英文描述: QSMRM QSM Queued Serial Module Reference Manual
中文描述: QSMRM QSM排隊串行模塊參考手冊
文件頁數(shù): 92/112頁
文件大?。?/td> 1496K
代理商: QSMRM
MOTOROLA
A-14
USING THE QSPI FOR ANALOG DATA AQUISITION
For More Information On This Product,
Go to: www.freescale.com
QSM
REFERENCE MANUAL
* SPCR0, SPCR1
*
INQS0
INQS1
INQS01
*
*
* SPCR2, SPCR3
*
INQS2
INQS3
INQS23
*
******
*
TXRAM0
TXRAM2
TXRAMF
*
CRAM0
CRAMF
*
********************
*
********************
*
*
FUELPS1
TEMP
V0LTAGE
*
*
**********************************************
*
QSPI TRANSMIT RAM INITIALIZATION CONSTANTS *
**********************************************
*
*
EQU
EQU
EQU
0000a804
0000970B
a804970B
10*BITS+MSTR+4 master, 10 bits, CPOL,CPHA=0,0, baud=2MHz
23*DSCKL+SPE+11 start QSPI, DSCK=1.4375 uS, DTL=22 uS
INQSO*$10000+INQS1 form into long word
EQU
EQU
EQU
QSPI RAM addresses and initialization values
EQU
$FFFFFD20 transmit RAM, entry 0
EQU
$FFFFFD24 transmit RAM, entry 2
EQU
$FFFFFD3E transmit RAM, entry F E
EQU
$FFFFFD40 control RAM, entry 0
EQU
$FFFFFD4F control RAM, entry F
0000420F
00000000
420f0000
2*ENDQ+WREN+$F wrap, endq = $2, newq = $F
$0000 nothing special, same as RESET state
INQS2*$10000+INQS3 form into long word
fffffD20
fffffD24
fffffD3E
fffffD40
fffffD4F
QSPI RECEIVE RAM *
entry #
--------
EQU
EQU
EQU
fffffD00
fffffD02
fffffD04
$FFFFFD00
$FFFFFD02
$FFFFFD04
0
1
2
QSPI location of A/D pressure result
QSPI location of A/D temperature result
QSPI location of A/D voltage result
TXQ entry
--------
sensor
------
temperature
voltage
pressure
000000C0
00000100
00000180
TXR0
TXR1
TXR2
EQU
EQU
EQU
*
EQU
*
TXR01
*
*
*
*
*
*
*
*
*
3*64
4*64
6*64
6*64
EQU
multiply A/D address by 64 to put the LSB into bit 6 of the 10-bit transfer
(MSB of the 4-bit A/D address will be MSB of 10-bit transfer)
NOTE: transmit queue entry 0 requests a conversion on A/D channel 3,
the temperature sensor. This result will be returned into receive
RAM in queue entry 1. The A/D result always gets transmitted
on the A/D transfer following its request.
A/D channel 3 address0
A/D channel 4 address1
A/D channel 6 address2
00000180
TXRF
A/D channel 6 addressF
pressure
00000100
TXR0*$10000+TXR1form into a LONG WORD
Figure A-9 Use of QSPI to Control A/D Conversions - 2 MHz A/D (Sheet 2 of 4)
F
Freescale Semiconductor, Inc.
n
.
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