Driver for the Adafruit 8.75" touch panel. More...

Classes
class	drivers.TouchPanel.TouchPanel
	A class for collecting information from the touch panel over I2C. More...

Variables
list	drivers.TouchPanel.INTERCEPT = [2008.5, 2120.3]
	Offsets to center of resistive touch panel. More...

list	drivers.TouchPanel.SLOPE = [20.364, -30.05]
	Slope (adc counts per mm) for each coordinate.

int	drivers.TouchPanel.LOW_THRESHOLD = 100
	Threshold for digital 'LOW' in adc counts.

	drivers.TouchPanel.panel = TouchPanel(Pin.cpu.A7, Pin.cpu.A6, Pin.cpu.A0, Pin.cpu.A1)

	drivers.TouchPanel.x_coord

	drivers.TouchPanel.y_coord

	drivers.TouchPanel.contacted

	drivers.TouchPanel.end

Detailed Description

Driver for the Adafruit 8.75" touch panel.

This driver is intended to be used with the Adafruit 8.75" Resistive Touch panel as mounted on the ME405 Lab0xFF platform. Default settings are based on calibration data taken May 25, 2021. Calibrations were taken by first laying out a grid on top of the touch panel with known real locations, then finding the average voltage (in adc counts) along each major line as shown below:

The default SLOPE and INTERCEPT arrays were calibrated using these plots:

Author: Tyler Olson

Date: June 5, 2021

Classes

Variables

Detailed Description