DIGILENT PmodACL2 3-Axis MEMS Accelerometer

PmodACL2TM Phau Ntawv Qhia

Hloov kho Lub Tsib Hlis 24, 2016
Phau ntawv no siv rau PmodACL2 rev. A 1300 Henley Court Pullman, WA 99163 509.334.6306

www.digilentinc.com

Tshajview
PmodACL2 yog 3-axis MEMS accelerometer powered los ntawm Analog Devices ADXL362. Los ntawm kev sib txuas lus nrog cov nti ntawm SPI raws tu qauv, cov neeg siv yuav tau txais txog li 12 qhov kev daws teeb meem rau txhua qhov axis ntawm acceleration. Tsis tas li ntawd, qhov module no muaj kev cuam tshuam sab nraud los ntawm kev tshawb pom ib zaug lossis ob zaug coj mus kuaj nrog rau lub zog txuag hluav taws xob los ntawm nws qhov kev saib xyuas tsis ua haujlwm.

Khoom nta

• 3-axis MEMS accelerometer
• Txog li 12 me ntsis ntawm kev daws teeb meem ib axis
• Cov neeg siv xaiv tau daws teeb meem
• Kev saib xyuas kev ua haujlwm / tsis ua haujlwm
• Tsawg siv tam sim no

Cov lus qhia siv khoom

1. Txuas PmodACL2 rau koj lub microcontroller lossis pawg thawj coj loj hlob siv SPI raws tu qauv.
2. Fais fab ntawm PmodACL2 thiab koj lub microcontroller/development board.
3. Txhawm rau nyeem cov ntaub ntawv nrawm, xa cov lus txib tsim nyog rau PmodACL2 ntawm SPI.
4. PmodACL2 muab txog 12 qhov kev daws teeb meem rau txhua qhov axis ntawm acceleration. Siv tus neeg siv xaiv qhov kev daws teeb meem los teeb tsa qhov kev daws teeb meem xav tau.
5. Txhawm rau txheeb xyuas cov kev cuam tshuam sab nraud, pab kom pom ib zaug lossis ob zaug coj mus kuaj pom ntawm PmodACL2.
6. Txhawm rau txuag hluav taws xob, siv qhov kev saib xyuas tsis ua haujlwm ntawm PmodACL2.
7. Xa mus rau PmodACL2 Reference Manual rau cov ncauj lus kom ntxaws ntawm SPI cov lus txib thiab cov kev xaiv teeb tsa.

Tshajview
PmodACL2 yog 3-axis MEMS accelerometer powered los ntawm Analog Devices ADXL362. Los ntawm kev sib txuas lus nrog cov nti ntawm SPI raws tu qauv, cov neeg siv yuav tau txais txog li 12 qhov kev daws teeb meem rau txhua qhov axis ntawm acceleration. Tsis tas li ntawd, qhov module no muaj kev cuam tshuam sab nraud los ntawm kev tshawb pom ib zaug lossis ob zaug ntxiv nrog rau kev txuag hluav taws xob txawm tias nws tsis ua haujlwm saib xyuas.

PmodACL2.

Nta muaj xws li:

• 3-axis MEMS accelerometer
• Txog li 12 me ntsis ntawm kev daws teeb meem ib axis
• Cov neeg siv xaiv tau daws teeb meem
• Kev saib xyuas kev ua haujlwm / tsis ua haujlwm
• Tsawg tam sim no noj ntawm <2 μA ntawm 100Hz
• Free-fall detection
• PCB me me rau cov qauv tsim 1.0 hauv ×
  0.8 nyob rau hauv (2.5cm × 2.0cm)
• Ua raws li Digilent Pmod Interface
  Specification Hom 2A
• Library thiab example code muaj
  nyob rau hauv lub chaw muab kev pab

Functional Description
Lub PmodACL2 siv Analog Devices ADXL362 los muab MEMS acceleration cov ntaub ntawv rau lub system board. Nrog nws qhov tob 512-sample FIFO tsis, cov neeg siv tau view ib txoj hlua ntev ntawm cov xwm txheej ua ntej ua rau muaj kev cuam tshuam los yog tsuas tuaj yeem muaj lub rooj tsav xwm nkag mus rau cov ntaub ntawv nrawm thaum tus neeg siv pom nws yooj yim tshaj plaws.

Interfacing nrog Pmod

PmodACL2 sib txuas lus nrog tus tswv tsev ntawm SPI raws tu qauv. Txhawm rau nyeem los ntawm cov ntaub ntawv sau npe,
Chip Xaiv kab yuav tsum xub rub qis thiab tom qab ntawd xa cov lus txib los nyeem los ntawm cov ntaub ntawv sau npe (0x0B).
Qhov chaw nyob xav tau byte yuav tsum raug xa mus rau tom ntej, thiab tom qab ntawd qhov xav tau byte tau txais nrog MSB ua ntej ntawm ntug kev poob. Vim hais tias qhov chaw nyob pointer pib-increments mus rau qhov chaw nyob tom ntej byte, nws muaj peev xwm nyeem ntau bytes sib law liag los ntawm kev txuas mus rau pulse Serial Clock kab. Ib example cov lus txib kom nyeem los ntawm lub npe yaxis yog muab hauv qab no:

Lus txib Nyeem									Thawj Y-axis Chaw Nyob
0	0	0	0	1	0	1	1	0		0	0	0	1	0	1	0

 

LSB Byte ntawm Y-axis Data

MSB Byte ntawm Y-axis Data

b7

b6

b5

b4

b3

b2

b1

LSB

SX

SX

SX

SX

MSB

b10 ua

b9

b8

Nco tseg: Txhua SX ntsis yog tib tus nqi raws li qhov tseem ceeb tshaj me ntsis ntawm cov ntaub ntawv y-axis.
Txhawm rau nyeem los ntawm FIFO tsis, ib lo lus txib los sau rau cov ntaub ntawv sau npe (0x0A) yuav tsum xa ua ntej kom peb tuaj yeem teeb tsa FIFO Control register (chaw nyob 0x28) los qhia tias peb xav kom FIFO tsis khaws cov ntaub ntawv. Tom qab ADXL362 tau teeb tsa los siv FIFO tsis, ib qho lus txib los nyeem los ntawm FIFO tsis (0x0D) yuav tsum tau xa ua ntej, tom qab ntawd los ntawm khub ntawm cov ntaub ntawv bytes uas muaj cov axis raug ntsuas nrog rau cov ntaub ntawv acceleration. Ib example cov lus txib kom nyeem los ntawm FIFO tsis yog muab hauv qab no:

Command Read FIFO Control Register Chaw Nyob Command FIFO Read
0 0 0 0 1 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1 0 1 XNUMX XNUMX XNUMX XNUMX XNUMX XNUMX

LSB Byte of Axis Data

MSB Byte ntawm Axis Data

b7

b6

b5

b4

b3

b2

b1

LSB

b15 ua

b14 ua

SX

SX

MSB

b10 ua

b9

b8

Nco tseg: Txhua SX ntsis yog tib tus nqi raws li qhov tseem ceeb tshaj me ntsis ntawm cov ntaub ntawv y-axis. b15 thiab b14 sawv cev rau qhov twg axis cov ntaub ntawv tuaj sawv cev.

Pinout Description Table

Pinout Table ntawm PmodACL2

Connector J1

Connector J2

Pin

Teeb liab

Kev piav qhia

Pin

Teeb liab

Kev piav qhia

Pin

Teeb liab

Kev piav qhia

1

~ CS

Chip xaiv

7

TSI 2

Interrupt Ob

1

TSI 1

Interrupt Ib

2

MOSI

Master Out qhev In

8

TSI 1

Interrupt Ib

2

G

Fais fab mov Hauv av

3

MISO

Master Nyob rau hauv qhev Tawm

9

NC

Tsis txuas

Connector J3

4

SCLK

Serial moos

10

NC

Tsis txuas

Pin

Teeb liab

Kev piav qhia

5

GND

Fais fab mov hauv av

11

GND

Fais fab mov hauv av

1

TSI 2

Interrupt Ob

6

VCC

Fais fab mov (3.3V)

12

VCC

Fais fab mov (3.3V)

2

G

Fais fab mov Hauv av

PmodACL2 kuj muaj ob lub programmable cuam tshuam tus pins muaj rau siv. Ob leeg ntawm cov pins no tuaj yeem raug teeb tsa los ua kom muaj kev cuam tshuam rau ntau qhov sib txawv nrog rau kev ua haujlwm / tsis ua haujlwm (los pab txo lub zog lub zog), thaum FIFO tsis tau ntim rau qib uas xav tau, thaum cov ntaub ntawv npaj tau rov qab, thiab lwm yam ua rau.
Txhua lub zog sab nraud siv rau PmodACL2 yuav tsum tsis pub dhau 1.6V thiab 3.5V. Yog li ntawd, nrog Digilent system boards, Pmod no yuav tsum tau khiav tawm ntawm 3.3V rail.

Lub cev Dimensions
Cov pins ntawm tus pin header yog spaced 100 m sib nrug. Lub PCB yog 0.95 nti ntev ntawm ob sab sib npaug rau cov pins ntawm tus pin header thiab 0.8 ntiv tes ntev ntawm ob sab perpendicular rau tus pin header.

Copyright Digilent, Inc. All rights reserved.
Lwm cov khoom lag luam thiab cov npe tuam txhab tau hais tuaj yeem yog cov cim lag luam ntawm lawv cov tswv.

Cov ntaub ntawv / Cov ntaub ntawv

DIGILENT PmodACL2 3-Axis MEMS Accelerometer [ua pdf] Tus tswv phau ntawv PmodACL2 3-Axis MEMS Accelerometer, PmodACL2, 3-Axis MEMS Accelerometer, MEMS Accelerometer, Accelerometer

Cov ntaub ntawv

• Cov neeg siv phau ntawv