Cameron Coward
Published © CC BY-NC-SA

A Smart Glove Computer Mouse

This is a "Smart Glove" wearable computer mouse that can be used with any PC, Mac, or Linux computer.

IntermediateFull instructions provided1 hour748
A Smart Glove Computer Mouse

Things used in this project

Hand tools and fabrication machines

3D Printer (generic)
3D Printer (generic)
Hot glue gun (generic)
Hot glue gun (generic)

Story

Read more

Custom parts and enclosures

BinhoBody1.stl

BinhoBody2.stl

FingerMount.stl

Code

Python Script

Python
The main Python script
from binhoHostAdapter import binhoHostAdapter
from binhoHostAdapter import binhoUtilities
import time
import math
import pyautogui

pyautogui.FAILSAFE = True				# This will kill the script if the cursor touches a corner

def twos_comp(val, bits):
	"""compute the 2's complement of int value val"""
	if (val & (1 << (bits - 1))) != 0: # if sign bit is set e.g., 8bit: 128-255
		val = val - (1 << bits)        # compute negative value
	return val

#change this line to your com port number
binhoTesterCommPort = 'COM3'

# Tweak these to improve performance of Click detection
refreshInterval = 0.05
clickThreshold = 12000

enable_accel = True
enable_flex = True

# No Need to edit anything below here
finger1_isDepressed = False
finger2_isDepressed = False
finger1_clickFlag = False
finger2_clickFlag = False

finger1_maxValue = 0
finger1_minValue = 25000

finger2_maxValue = 0
finger2_minValue = 25000

addr_accel = 0x3A
binhoTester = binhoHostAdapter.binhoHostAdapter(binhoTesterCommPort)

print("SmartGlove V3 Script")

loop = True

# initialize the Binho host adapter for I2C communication
binhoTester.setNumericalBase('DEC')
binhoTester.setOperationMode(0, 'I2C')
binhoTester.setPullUpStateI2C(0, 'EN')
binhoTester.setClockI2C(0, 400000)

if enable_accel:

	# put accelerometer in standby
	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x2A)
	binhoTester.endI2C(0)
	result = binhoTester.readBytesI2C(0, addr_accel, 1)
	resp = result.split(" ")
	ctrl_reg = int(resp[2]) & ~(0x01)

	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x2A)
	binhoTester.writeByteI2C(0, ctrl_reg)
	binhoTester.endI2C(0)

	# set scale
	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x0E)
	binhoTester.endI2C(0)
	result = binhoTester.readBytesI2C(0, addr_accel, 1)
	resp = result.split(" ")

	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x0E)
	binhoTester.writeByteI2C(0, 0x00)
	binhoTester.endI2C(0)

	#set datarate
	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x2A)
	binhoTester.endI2C(0)
	result = binhoTester.readBytesI2C(0, addr_accel, 1)
	resp = result.split(" ")
	ctrl_reg = int(resp[2]) & 0xC7
	ctrl_reg |= (0x01 << 3)

	binhoTester.startI2C(0, addr_accel)
	binhoTester.writeByteI2C(0, 0x2A)
	binhoTester.writeByteI2C(0, 0x01)
	binhoTester.endI2C(0)

while (loop == True):

	if enable_accel:
		# get values from accelerometer
		binhoTester.startI2C(0, addr_accel)
		binhoTester.writeByteI2C(0, 0x01)
		binhoTester.endI2C(0)
		result = binhoTester.readBytesI2C(0, addr_accel, 7)
		resp = result.split(" ")
		x_value = (int(resp[3]) << 8 | int(resp[4]))
		y_value = (int(resp[5]) << 8 | int(resp[6]))
		z_value = (int(resp[7]) << 8 | int(resp[8]))

		x_signed = ((twos_comp(x_value, 16) >> 4))
		y_signed = ((twos_comp(y_value, 16) >> 4))
		z_signed = ((twos_comp(z_value, 16) >> 4))

		x_gs = x_signed / 1024
		y_gs = y_signed / 1024
		z_gs = z_signed / 1024

		mag = math.sqrt(x_gs**2 + y_gs**2 + z_gs**2)

		#print('raw accel: [' + str(x_signed) + ', ' + str(y_signed) + ', ' + str(z_signed) +']')
		#print('Gravity Vector: [' + str(x_gs) + 'g, ' + str(y_gs) + 'g, ' + str(z_gs) +'g]')
		#print('Mag: ' + str(mag) + 'g')


		# Move the cursor, scaled exponentially to tilt angle
		if y_gs > 0.1:
			x_speed = -400 * (y_gs**2)
		elif y_gs < -0.1:
			x_speed = 400 * (y_gs**2)
		else:
			x_speed = 0

		if x_gs > 0.1:
			y_speed = -400 * (x_gs**2)
		elif x_gs < -0.1:
			y_speed = 400 * (x_gs**2)
		else:
			y_speed = 0

		pyautogui.moveRel(x_speed, y_speed, duration=0.1)

	if enable_flex:
		# read finger0 analog
		binhoTester.startI2C(0, 0x90)
		binhoTester.writeByteI2C(0, 0x01)
		binhoTester.writeByteI2C(0, 0xC0)
		binhoTester.writeByteI2C(0, 0x80)
		binhoTester.endI2C(0)

		binhoTester.startI2C(0, 0x90)
		binhoTester.writeByteI2C(0, 0x00)
		binhoTester.endI2C(0)

		result = binhoTester.readBytesI2C(0, 0x90, 2)

		resp = result.split(" ")

		finger1 = int(int(resp[2]) << 8 | int(resp[3]))

		if finger1 < finger1_minValue:
			finger1_minValue = finger1
		elif finger1 > finger1_maxValue:
			finger1_maxValue = finger1

		if finger1_isDepressed:
			if finger1 > clickThreshold:
				finger1_isDepressed = False
				finger1_clickFlag = True
		else:
			if finger1 < clickThreshold:
				finger1_isDepressed = True

		if finger1_clickFlag:
			finger1_clickFlag = False
			#print('finger1: [currVal:' + str(finger1) + ', min:' + str(finger1_minValue) + ', max:' + str(finger1_maxValue)	+'] CLICK!')
			pyautogui.click(button='right') # right click mouse
		else:
			#print('finger1: [currVal:' + str(finger1) + ', min:' + str(finger1_minValue) + ', max:' + str(finger1_maxValue)	+']')
			pass

		binhoTester.startI2C(0, 0x90)
		binhoTester.writeByteI2C(0, 0x01)
		binhoTester.writeByteI2C(0, 0xD0)
		binhoTester.writeByteI2C(0, 0x80)
		binhoTester.endI2C(0)

		binhoTester.startI2C(0, 0x90)
		binhoTester.writeByteI2C(0, 0x00)
		binhoTester.endI2C(0)

		binhoTester.startI2C(0, 0x90)
		binhoTester.writeByteI2C(0, 0x00)
		binhoTester.endI2C(0)

		result = binhoTester.readBytesI2C(0, 0x90, 2)
		resp = result.split(" ")

		finger2 = int(int(resp[2]) << 8 | int(resp[3]))

		if finger2 < finger2_minValue:
			finger2_minValue = finger2
		elif finger2 > finger2_maxValue:
			finger2_maxValue = finger2

		if finger2_isDepressed:
			if finger2 > clickThreshold:
				finger2_isDepressed = False
				finger2_clickFlag = True
		else:
			if finger2 < clickThreshold:
				finger2_isDepressed = True

		if finger2_clickFlag:
			finger2_clickFlag = False
			#print('finger2: [currVal:' + str(finger2) + ', min:' + str(finger2_minValue) + ', max:' + str(finger2_maxValue)	+'] CLICK!')
			pyautogui.click(button='left') # left click mouse
		else:
			#print('finger2: [currVal:' + str(finger2) + ', min:' + str(finger2_minValue) + ', max:' + str(finger2_maxValue)	+']')
			pass

	time.sleep(refreshInterval)

# close the connection to the Binho host adapter
binhoTester.close()

Credits

Cameron Coward

Cameron Coward

7 projects • 357 followers

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