DIGILENT PmodACL2 3-Axis MEMS Accelerometer

PmodACL2TM Reference Manual

Inasinthidwa pa Meyi 24, 2016
Bukuli likugwira ntchito ku PmodACL2 rev. A 1300 Henley Court Pullman, WA 99163 509.334.6306

www.digilentinc.com

Zathaview
PmodACL2 ndi 3-axis MEMS accelerometer yoyendetsedwa ndi Analog Devices ADXL362. Polumikizana ndi chip kudzera pa protocol ya SPI, ogwiritsa ntchito atha kulandira mpaka 12 bits of resolution pa axis iliyonse yothamangira. Kuphatikiza apo, gawoli limapereka zowunikira zakunja kudzera pakuzindikira kamodzi kapena kawiri komanso kupulumutsa mphamvu kudzera pakuwunika kwake kosagwira ntchito.

Zogulitsa Zamankhwala

• 3-axis MEMS accelerometer
• Kufikira ma bits 12 osintha pa axis iliyonse
• Kusankhika kwa ogwiritsa ntchito
• Kuyang'anira zochita/zopanda ntchito
• Kuchepa kwapakali pano

Malangizo Ogwiritsira Ntchito Zogulitsa

1. Lumikizani PmodACL2 ku microcontroller kapena bolodi lachitukuko pogwiritsa ntchito protocol ya SPI.
2. Mphamvu pa PmodACL2 ndi microcontroller/development board.
3. Kuti muwerenge deta yofulumira, tumizani malamulo oyenerera ku PmodACL2 kudzera pa SPI.
4. PmodACL2 imapereka mpaka 12 bits of resolution pa axis iliyonse yothamanga. Gwiritsani ntchito mawonekedwe osankhidwa ndi ogwiritsa ntchito kuti mukonze zomwe mukufuna.
5. Kuti muwone zoyambitsa zakunja, yambitsani mawonekedwe amodzi kapena awiri pa PmodACL2.
6. Kuti musunge mphamvu, gwiritsani ntchito mawonekedwe osagwira ntchito a PmodACL2.
7. Onani PmodACL2 Reference Manual kuti mudziwe zambiri za malamulo a SPI ndi zosankha za kasinthidwe.

Zathaview
PmodACL2 ndi 3-axis MEMS accelerometer yoyendetsedwa ndi Analog Devices ADXL362. Polumikizana ndi chip kudzera pa protocol ya SPI, ogwiritsa ntchito atha kulandira mpaka 12 bits of resolution pa axis iliyonse yothamangira. Kuphatikiza apo, gawoli limapereka zowunikira zakunja kudzera pakuzindikira kamodzi kapena kawiri komanso kupulumutsa mphamvu ngakhale kuwunika kwake sikukugwira ntchito.

PmodACL2.

Zina mwazo ndi:

• 3-axis MEMS accelerometer
• Kufikira ma bits 12 osintha pa axis iliyonse
• Kusankhika kwa ogwiritsa ntchito
• Kuyang'anira zochita/zopanda ntchito
• Kugwiritsa ntchito pakali pano pa <2 μA pa 100Hz
• Kuzindikira kopanda kugwa
• Kukula kwakung'ono kwa PCB kwa mapangidwe osinthika 1.0 mu ×
  0.8 mu (2.5 cm × 2.0 cm)
• Imatsatira Digilent Pmod Interface
  Mtundu wa 2A
• Library ndi exampkodi ilipo
  mu resource center

Kufotokozera Kwantchito
PmodACL2 imagwiritsa ntchito Analog Devices ADXL362 kuti ipereke deta yofulumira ya MEMS ku board board. Ndi kuya kwake kwa 512-sampndi FIFO buffer, ogwiritsa ntchito amatha view mndandanda wautali wa zochitika zisanachitike kusokoneza koyambitsa kapena kungokhala ndi mwayi wopeza ma data a board board pomwe wogwiritsa ntchito apeza kuti ndizosavuta.

Kulumikizana ndi Pmod

PmodACL2 imalumikizana ndi board board kudzera pa protocol ya SPI. Kuti muwerenge kuchokera pamakaundula a data omwe ali pa board,
mzere wa Chip Select uyenera kutsika pang'ono kenako utumize command byte kuti uwerenge kuchokera m'kaundula wa data (0x0B).
Adilesi yomwe mukufuna iyenera kutumizidwa kenako, kenako byte yofunidwayo imalandiridwa ndi MSB poyamba pamphepete mwa wotchi yakugwa. Chifukwa cholozera cha adilesi chimadziwonjezera pa adilesi yotsatira, ndizotheka kuwerenga ma byte angapo motsatizana popitiliza kugunda mzere wa Serial Clock. Exampleti la malamulo oti muwerenge kuchokera ku regista ya yaxis laperekedwa pansipa:

Command Read									Adilesi Yoyamba ya Y-axis
0	0	0	0	1	0	1	1	0		0	0	0	1	0	1	0

 

LSB Byte ya Y-axis Data

MSB Byte ya Y-axis Data

b7

b6

b5

b4

b3

b2

b1

LSB

SX

SX

SX

SX

MSB

b10

b9

b8

Zindikirani: Chigawo chilichonse cha SX ndi mtengo wofanana ndi wofunikira kwambiri wa data ya y-axis.
Kuti muwerenge kuchokera ku buffer ya FIFO, lamulo la byte lolembera ku regista ya data (0x0A) liyenera kutumizidwa kaye kuti tithe kukonza kaundula wa FIFO Control (adilesi 0x28) kusonyeza kuti tikufuna FIFO buffer kusunga deta. ADXL362 itakonzedwa kuti igwiritse ntchito buffer ya FIFO, lamulo loti liwerenge kuchokera ku FIFO buffer (0x0D) liyenera kutumizidwa kaye, kenako ndikutsatiridwa ndi awiriawiri a ma data omwe ali ndi ma axis omwe akuyezedwa komanso kuchuluka kwa mathamangitsidwe. Exampseti ya malamulo oti muwerenge kuchokera ku buffer ya FIFO yaperekedwa pansipa:

Command Read FIFO Control Register Adilesi Lamulo la 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.

LSB Byte of Axis Data

MSB Byte of Axis Data

b7

b6

b5

b4

b3

b2

b1

LSB

b15

b14

SX

SX

MSB

b10

b9

b8

Zindikirani: Chigawo chilichonse cha SX ndi mtengo wofanana ndi wofunikira kwambiri wa data ya y-axis. b15 ndi b14 zikuyimira mbali yomwe deta yomwe ikubwera ikuyimira.

Pinout Kufotokozera Table

Pinout Table ya PmodACL2

Cholumikizira J1

Cholumikizira J2

Pin

Chizindikiro

Kufotokozera

Pin

Chizindikiro

Kufotokozera

Pin

Chizindikiro

Kufotokozera

1

~CS

Chip kusankha

7

INT2

Dulani Awiri

1

INT1

Dulani Mmodzi

2

MOSI

Master Out Kapolo In

8

INT1

Dulani Mmodzi

2

G

Magetsi Pansi

3

MISO

Master In Kapolo Kutuluka

9

NC

Osalumikizidwa

Cholumikizira J3

4

CHIKWANGWANI

Wotchi ya seri

10

NC

Osalumikizidwa

Pin

Chizindikiro

Kufotokozera

5

GND

Magetsi pansi

11

GND

Magetsi pansi

1

INT2

Dulani Awiri

6

Chithunzi cha VCC

Magetsi (3.3V)

12

Chithunzi cha VCC

Magetsi (3.3V)

2

G

Magetsi Pansi

PmodACL2 ilinso ndi zikhomo ziwiri zosokoneza zomwe zingagwiritsidwe ntchito. Mapini onsewa amatha kukhazikitsidwa kuti ayambitse kusokoneza pazoyambitsa zingapo zosiyanasiyana kuphatikiza ntchito / kusagwira ntchito (kuthandiza kuchepetsa mphamvu zamakina), pomwe buffer ya FIFO ikadzazidwa pamlingo womwe ukufunidwa, data ikakonzeka kubwezedwa, ndi zina zoyambitsa.
Mphamvu iliyonse yakunja yogwiritsidwa ntchito ku PmodACL2 iyenera kukhala mkati mwa 1.6V ndi 3.5V. Chifukwa chake, ndi ma board a Digilent system, Pmod iyi iyenera kuthamangitsidwa ndi njanji ya 3.3V.

Miyeso Yathupi
Mapini pamutu wa pini amatalikirana ndi 100 mil. PCB ndi mainchesi 0.95 m'mbali mwake molingana ndi zikhomo pamutu wa pini ndi mainchesi 0.8 m'mbali mwake molingana ndi mutu wa pini.

Copyright Digilent, Inc. Ufulu wonse ndi wotetezedwa.
Mayina ena azinthu ndi makampani omwe atchulidwa akhoza kukhala zizindikiro za eni ake.

Zolemba / Zothandizira

DIGILENT PmodACL2 3-Axis MEMS Accelerometer [pdf] Buku la Mwini PmodACL2 3-Axis MEMS Accelerometer, PmodACL2, 3-Axis MEMS Accelerometer, MEMS Accelerometer, Accelerometer

Maumboni

• Buku Logwiritsa Ntchito