Difference between revisions of "BPI-PC101 gesture recognition module"

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= Introduction=
 
= Introduction=
  
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[[File:Webduino_gif.gif|thumb|Overview: BPI:bit]]
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[[File:Pc101Gesture_Sensor_1_.jpg|thumb|Overview:PC101 Gesture_Sensor]]
−
[[File:Webduino_bit_1.JPG|thumb|Overview: BPI:bit]]
+
[[File:Pc101_Gesture_Sensor_2.jpg|thumb|PC101 Gesture_Sensor]]
−
[[File:BPi_bit_webduino_3.jpg|thumb|Overview: BPI:bit for Webduino]]
 
  
−
The '''BPI bit''' (also referred to as '''BPI-bit''', stylised as '''bpi:bit''') is an ESP32 with 32-bit Xtensa LX6 dual-core processor based embedded system. It supports Webduino, Arduino, MicroPython as well as Scratch X programming environments.
 
  
−
BPI:bit hardware main function:
 
  
−
[[File:Webduino_web_en_1.png]]
+
The PC101 integrates an ambient light (ALS) sensor, a proximity sensor (PS) and 6-D gesture
 +
sensors with built-in IR LED. It is used in notebook PCs, smartphones, MIDs (mobile internet devices),PNDs (portable navigation devices), e-books, tablet PCs, flat-panel televisions, etc. for extending battery life and for better user experience. Ambient light sensor optimizes the screen brightness to extend battery and to increase battery life. Proximity sensor (PS) measures the IR reflection intensity which correlates to the distance of the object. Proximity sensor enables the device controller to turn off the LCD back-light and the touch-screen sensor when the device is held close to your ear, placed inside the pocket, purse, or bags. This function saves the battery power and avoids unintended touch-screen trigger. Proximity sensor can also work as a device wake-up sensor by sensing the user waving the hand in front of the device. The 6-D gesture sensor detects the waving of palm in front of the screen in 6
 +
directions left, right, up, down and z-axis. The hand gesture without the need to touch the screen adds new way of human device interaction. For example, the gesture can be used to accept a phone call in the hand-free mode while the user is driving in a car. In another example, the user wave to the screen to advance or retract in the picture viewing mode without worrying the food stains from the fingers to be left on the screen.
  
−
bpi:bit board is 5 cm x 5 cm in size, weighs 10 ~ 12 grams, it houses a 20-Pin edge connector, built-in lighting matrix with 25 programmable full-color LEDs , two photosensitive light sensors, two programmable buttons, an NTC resistor, a buzzer and a nine shaft sensor (triaxial acceleration Three-axis gyroscope and three-axis magnetic compass), the I/O space configuration is as follows:
+
== Key Features ==
 +
*Digital control and data output via I2C (100 KHz and 400 KHz) interface
 +
*ALS, PS and Gesture sensor with built-in IR LED
 +
*Slave Address  0x58
 +
*6D Gesture Recognition Distance: 20~200 mm（up、down、left、right、hold）
 +
*Programmable interrupt function for ALS and PS with upper and lower thresholds
 +
*Support interrupt notification
  
−
*Full color LED matrix: GPIO4
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==Applications==
−
*Photosensitive sensor: GPIO36 (Analog A0, upper left), GPIO39 (Analog A3, upper right)
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*smart lights
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*Button switch : GPIO35 (A), GPIO27 (B)
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*Household electrical control
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*Temperature sensor: GPIO34 (Analog A6)
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*Music control equipment
−
*Buzzer: GPIO25
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*Game equipment
−
*MPU-9250 9-axis sensor: GPIO0, GPIO21, GPIO22, GPIO33
+
*Smart bath
 +
*Distance detection
 +
*Smart toy
  
 
= Hardware =
 
= Hardware =
 +
==Interface==
 +
[[File:Pc101_interface.jpg]]
 +
 +
==Block Diagram==
 +
[[File:Pc101_block.png]]
 +
 +
==PC101 DFN Pin Assignment==
 +
 +
[[File:Pc101_1.png]]
 +
 +
==Hardware spec==
 +
 +
==PC101 PIN definitions==
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''PC101 Gesture Sensor Pin define '''
 +
|-
 +
|Pin || Name|| Description
 +
|-
 +
|1 ||5V || Power
 +
|-
 +
|2|| GND || Ground
 +
|-
 +
|3|| INT || Digital Out
 +
|-
 +
|4 || SCL || Serial Digital Input Clock
 +
|-
 +
|5|| SDA || Serial Digital I/O Data
 +
|-
 +
|6 ||TXD|| Serial port sends pins
 +
|-
 +
|7 ||RXD|| The serial port receives the pin
 +
|-
 +
|}
 +
 +
==Application Circuit==
 +
 +
[[File:Pc101_2.png]]
 +
 +
==Electrical Characteristics==
 +
 +
* Voltage characteristic
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''Voltage characteristic '''
 +
|-
 +
|No || pin || MIN|| TYP || MAX || UNIT
 +
|-
 +
|1 || 5V || 4.5 || 5.0 || 5.5 || V
 +
|-
 +
|2|| GND || -0.3 || 0 ||0.3 || V
 +
|-
 +
|3|| INT || GND ||0/3.3|| 3.7 || V
 +
|-
 +
|4|| SCL || -0.3|| 0/3.3|| 3.7 || V
 +
|-
 +
|5|| SDA || -0.3 || 0/3.3 ||3.7 || V
 +
|-
 +
|}
 +
 +
*Digital interface characteristics
 +
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''Digital interface characteristics '''
 +
|-
 +
|No || Description ||MIN|| TYP|| MAX|| UNIT
 +
|-
 +
|1 || SCL/SDA：LOW || -0.3 || - || 1.0 || V
 +
|-
 +
|2 || SCL/SDA：HIGH || 2.3 || - || 3.6 || V
 +
|-
 +
|3 || SCL || 0 || - || 400 || kHz
 +
|-
 +
|4 || Pull-up resistors || - || 2.0 || - || kΩ
 +
|-
 +
|5 || INT：LOW ||- || - || 0.4 || V
 +
|-
 +
|6 || INT：HIGH ||2.4 || - || - || V
 +
|-
 +
|}
 +
 +
==I2C interface==
 +
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| ''I2C interface '''
 +
|-
 +
|Ordering Chip Information ||Write to Slave ||Read from Slave
 +
|-
 +
|PC101 ||1011000 ||1011001
 +
|-
 +
|}
 +
 +
*Receive (Single Read) data from register
 +
 +
[[File:Pc101_3.png]]
 +
 +
*Send (Single Write) data into register
 +
 +
[[File:Pc101_4.png]]
 +
 +
=Principles of Operation=
 +
 +
Total register addresses are maintained inside the I2C block, each having a 8-bit register address. Each address accommodates an 8-bit data register that can be either written or read via I2C. The command registers program the sensor for various modes, setting and Interrupt threshold. The read-only registers contains output codes.
 +
 +
*Register Table and Definitions
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''Register Table and Definitions'''
 +
|-
 +
|NAME ||R/W ||8-bit Address || Default || Descrition
 +
|-
 +
|ChipID || R || 0x00 || 0xAA || Chip ID
 +
|-
 +
|Capability|| R || 0x01 || 0xF0 || Gesture Functional description
 +
|-
 +
|LibVersion || R || 0x02 || 0xB1 || Gesture Version
 +
|-
 +
|Gesture || R || 0x03 || 0x00 || Gesture Data
 +
|-
 +
|Proximity || R || 0x04 || 0x00 || Distance
 +
|-
 +
|}
 +
 +
*0x00： ChipID
  
−
==Description ==
+
This address holds ChipID, which is 0xAA by default and can be read to verify that I2C reading is normal.
  
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The board is 5 cm × 5 cm and has an ESP32 module with 32bit Xtensa LX6 dual-core processor, with a capacity of up to 600DMIPS, with a built-in 448KB ROM and 520 KB SRAM.accelerometer and magnetometer sensors,2.4G WiFI,Bluetooth and USB connectivity, a display consisting of 25 [[Light-emitting diode|LEDs]], two programmable buttons, and can be powered by either USB or an external battery pack.The device inputs and outputs are through five ring connectors that are part of the 23-pin edge connector.
+
*0x01： Capability
  
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BPI:bit provides a wide range of onboard resources, supports photosensitive sensor, digital triaxial sensor, digital compass, temperature sensor interface.Webduino:bit have 25 intelligent control LED light source that the control circuit and RGB chip are integrated in a package of 5050 components.Cascading port transmission signal by single line.Each pixel of the three primary color can achieve 256 brightness display, completed 16777216 color full color display, and scan frequency not less than 400Hz/s.
+
This address holds a bitmap of the gesture detection capability, 0 Disable, 1 enable.
  
−
BPI:bit use MPU9250 onboard, MPU-9250 is a multi-chip module (MCM) consisting of two dies integrated into a single QFN package. One die houses the 3-Axis gyroscope and the 3-Axis accelerometer. The other die houses the AK8963 3-Axis magnetometer from Asahi Kasei Microdevices Corporation. Hence, the MPU-9250 is a 9-axis MotionTracking device that combines a 3-axis gyroscope, 3-axis accelerometer, 3-axis magnetometer and a Digital Motion Processor™ (DMP) all in a small 3x3x1mm package available as a pin-compatible upgrade from the MPU-6515. With its dedicated I2C sensor bus, the MPU-9250directly provides complete 9-axis MotionFusion™ output. The MPU-9250 MotionTracking device, with its 9-axis integration, on-chip MotionFusion™, and runtime calibration firmware, enables manufacturers to eliminate the costly and complex selection, qualification, and system level integration of discrete devices, guaranteeing optimal motion performance for consumers. MPU-9250 is also designed to interface with multiple non-inertial digital sensors, such as pressure sensors, on its auxiliary I²C port.
+
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''Digital interface characteristics '''
 +
|-
 +
|BIT || 7 || 6 || 5 ||4 ||3 || 2 || 1 ||0
 +
|-
 +
|Read || Proximity|| Hold|| Left/Right|| Up/Down|| Reserved|| Reserved|| Reserved|| Reserved
 +
|-
 +
|Reset|| 1 || 1 ||1 || 1|| 0 ||0|| 0|| 0
 +
|-
 +
|}
 +
The default is all supported, so the register defaults is 0xF0.
  
−
==Interface==
+
*0x02： LibVersion
 +
 
 +
This address holds Gesture Version defaults is 0xB1.
 +
 
 +
*0x03： Gesture Date
 +
 
 +
The address is stored with the result of gesture detection.
 +
 
 +
{| class="wikitable"
 +
|-
 +
| style="background: PaleTurquoise; color: black" colspan="4"| '''address of gesture detection '''
 +
|-
 +
|0：|| Gesture（Hold） ||    0xA0
 +
|-
 +
|1：|| Gesture（Up）|| 0xA1
 +
|-
 +
|2：|| Gesture（Down）||    0xA2
 +
|-
 +
|3：|| Gesture（Left）||      0xA3
 +
|-
 +
|4：|| Gesture（Right）||    0xA4
 +
|-
 +
|}
 +
 
 +
*0x04： Proximity Date
 +
 
 +
This address holds the distance of the gesture from 0 to 255, the larger is near, the smaller is far.
 +
 
 +
=How to Start=
 +
==Use Uart==
 +
[[File:Pc101_5.png]]
 +
 
 +
Connect product like the Circuit diagram , Set the Baud Rate as 115200
 +
 
 +
[[File:Pc101_6.png]]
 +
 
 +
Using TTL-USB moudle, you can see the data like the picture
 +
 
 +
[[File:Pc101_7.png]]
 +
 
 +
==Use I2C==
 +
 
 +
Connect product like the Circuit diagram
 +
 
 +
[[File:Pc101_8.png]]
 +
 
 +
Set the SlaveAddress as 0x58,
 +
 
 +
Read Register 0x00, and result is 0xAA.
 +
 
 +
So, the I2C communicate success.
 +
 
 +
*Plan one : Polling
 +
 
 +
Every 100ms read once gesture data.
 +
 
 +
Read Register 0x03, and result is Gesture data.
 +
 
 +
[[File:Pc101_9.png]]
 +
 
 +
*Plan two :Interrupt
 +
 
 +
Read once gesture data when trigger edge is falling edg.
 +
 
 +
Read Register 0x03, and result is Gesture data.
  
−
[[File:BPI bit interfact.JPG]]
+
[[File:Pc101_10.png]]
  
−
==Edge interface==
+
Need connect Pin INT.
  
−
[[File:BPI bit edge pin define.png]]
+
=Documents=
  
−
==PIN definitions==
+
*Discuss on forum : http://forum.banana-pi.org/t/banana-pi-bpi-pc101-gesture-recognition-module/5507
 +
*Easy to buy sample : https://www.aliexpress.com/store/product/Banana-PI-PC101-Gesture-Recognition-Module/302756_32892011635.html?spm=2114.12010611.8148356.5.3a1c30d9Vlrr5B

Latest revision as of 02:09, 28 June 2018

Introduction

Overview:PC101 Gesture_Sensor
PC101 Gesture_Sensor


The PC101 integrates an ambient light (ALS) sensor, a proximity sensor (PS) and 6-D gesture sensors with built-in IR LED. It is used in notebook PCs, smartphones, MIDs (mobile internet devices),PNDs (portable navigation devices), e-books, tablet PCs, flat-panel televisions, etc. for extending battery life and for better user experience. Ambient light sensor optimizes the screen brightness to extend battery and to increase battery life. Proximity sensor (PS) measures the IR reflection intensity which correlates to the distance of the object. Proximity sensor enables the device controller to turn off the LCD back-light and the touch-screen sensor when the device is held close to your ear, placed inside the pocket, purse, or bags. This function saves the battery power and avoids unintended touch-screen trigger. Proximity sensor can also work as a device wake-up sensor by sensing the user waving the hand in front of the device. The 6-D gesture sensor detects the waving of palm in front of the screen in 6 directions left, right, up, down and z-axis. The hand gesture without the need to touch the screen adds new way of human device interaction. For example, the gesture can be used to accept a phone call in the hand-free mode while the user is driving in a car. In another example, the user wave to the screen to advance or retract in the picture viewing mode without worrying the food stains from the fingers to be left on the screen.

Key Features

  • Digital control and data output via I2C (100 KHz and 400 KHz) interface
  • ALS, PS and Gesture sensor with built-in IR LED
  • Slave Address 0x58
  • 6D Gesture Recognition Distance: 20~200 mm（up、down、left、right、hold）
  • Programmable interrupt function for ALS and PS with upper and lower thresholds
  • Support interrupt notification

Applications

  • smart lights
  • Household electrical control
  • Music control equipment
  • Game equipment
  • Smart bath
  • Distance detection
  • Smart toy

Hardware

Interface

Pc101 interface.jpg

Block Diagram

Pc101 block.png

PC101 DFN Pin Assignment

Pc101 1.png

Hardware spec

PC101 PIN definitions

PC101 Gesture Sensor Pin define
Pin Name Description
1 5V Power
2 GND Ground
3 INT Digital Out
4 SCL Serial Digital Input Clock
5 SDA Serial Digital I/O Data
6 TXD Serial port sends pins
7 RXD The serial port receives the pin

Application Circuit

Pc101 2.png

Electrical Characteristics

  • Voltage characteristic
Voltage characteristic
No pin MIN TYP MAX UNIT
1 5V 4.5 5.0 5.5 V
2 GND -0.3 0 0.3 V
3 INT GND 0/3.3 3.7 V
4 SCL -0.3 0/3.3 3.7 V
5 SDA -0.3 0/3.3 3.7 V
  • Digital interface characteristics
Digital interface characteristics
No Description MIN TYP MAX UNIT
1 SCL/SDA：LOW -0.3 - 1.0 V
2 SCL/SDA：HIGH 2.3 - 3.6 V
3 SCL 0 - 400 kHz
4 Pull-up resistors - 2.0 - kΩ
5 INT：LOW - - 0.4 V
6 INT：HIGH 2.4 - - V

I2C interface

I2C interface '
Ordering Chip Information Write to Slave Read from Slave
PC101 1011000 1011001
  • Receive (Single Read) data from register

Pc101 3.png

  • Send (Single Write) data into register

Pc101 4.png

Principles of Operation

Total register addresses are maintained inside the I2C block, each having a 8-bit register address. Each address accommodates an 8-bit data register that can be either written or read via I2C. The command registers program the sensor for various modes, setting and Interrupt threshold. The read-only registers contains output codes.

  • Register Table and Definitions
Register Table and Definitions
NAME R/W 8-bit Address Default Descrition
ChipID R 0x00 0xAA Chip ID
Capability R 0x01 0xF0 Gesture Functional description
LibVersion R 0x02 0xB1 Gesture Version
Gesture R 0x03 0x00 Gesture Data
Proximity R 0x04 0x00 Distance
  • 0x00： ChipID

This address holds ChipID, which is 0xAA by default and can be read to verify that I2C reading is normal.

  • 0x01： Capability

This address holds a bitmap of the gesture detection capability, 0 Disable, 1 enable.

Digital interface characteristics
BIT 7 6 5 4 3 2 1 0
Read Proximity Hold Left/Right Up/Down Reserved Reserved Reserved Reserved
Reset 1 1 1 1 0 0 0 0

The default is all supported, so the register defaults is 0xF0.

  • 0x02： LibVersion

This address holds Gesture Version defaults is 0xB1.

  • 0x03： Gesture Date

The address is stored with the result of gesture detection.

address of gesture detection
0： Gesture（Hold） 0xA0
1： Gesture（Up） 0xA1
2： Gesture（Down） 0xA2
3： Gesture（Left） 0xA3
4： Gesture（Right） 0xA4
  • 0x04： Proximity Date

This address holds the distance of the gesture from 0 to 255, the larger is near, the smaller is far.

How to Start

Use Uart

Pc101 5.png

Connect product like the Circuit diagram , Set the Baud Rate as 115200

Pc101 6.png

Using TTL-USB moudle, you can see the data like the picture

Pc101 7.png

Use I2C

Connect product like the Circuit diagram

Pc101 8.png

Set the SlaveAddress as 0x58,

Read Register 0x00, and result is 0xAA.

So, the I2C communicate success.

  • Plan one : Polling

Every 100ms read once gesture data.

Read Register 0x03, and result is Gesture data.

Pc101 9.png

  • Plan two :Interrupt

Read once gesture data when trigger edge is falling edg.

Read Register 0x03, and result is Gesture data.

Pc101 10.png

Need connect Pin INT.

Documents

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