Touch_Panel_Driver.Touch_Panel Class Reference

Public Member Functions
def	__init__ (self, xp, xm, yp, ym, width, height, center_x, center_y)
def	Scan_x (self)
	Finds the x position of contact on touch panel. More...
def	Scan_y (self)
	Finds the x position of contact on touch panel. More...
def	Scan_z (self)
	Determines if there is contact on the touch panel. More...
def	Get_Pos (self)
	Generates tuple describing contact position on touch panel. More...

Public Attributes
	xp
	Pin object to be used for x positive.
	xm
	Pin object to be used for x negative.
	yp
	Pin object to be used for y positive.
	ym
	Pin object to be used for y negative.
	width
	Variable defining the width of the touch panel in mm.
	height
	Variable defining the height of the touch panel in mm.
	center_x
	Variable defining the measured x-axis center of the touch panel in mm.
	center_y
	Variable defining the measured y-axis center of the touch panel in mm.
	z_bound
	Variable defining the adc threshold for touch panel contact.
	x_max
	Varaible defining the max adc output along the x-axis.
	x_min
	Variable defining the min adc output along the x-axis.
	y_max
	Variable defining the max adc output along the y-axis.
	y_min
	Variable defining the min adc output along the y-axis.
	adc_ym
	ADC object reading output from y negative pin on touch panel.
	x_val
	Variable storing the x position ADC output from touch panel.
	x_mm
	Variable storing the converted and zeroed ADC output for x position.
	adc_xm
	ADC object reading output from x negative pin on touch panel.
	y_val
	Variable storing the y position ADC output from touch panel.
	y_mm
	Variable storing the converted and zeroed ADC output for y position.
	z_val
	Variable storing the z ADC output from touch panel.

Constructor & Destructor Documentation

__init__()

def Touch_Panel_Driver.Touch_Panel.__init__	(		self,
			xp,
			xm,
			yp,
			ym,
			width,
			height,
			center_x,
			center_y
	)

   @param xp   Pin to be used for positive X direction.
   @param xm   Pin to be used for negative X direction.
   @param yp   Pin to be used for positive Y direction.
   @param ym   Pin to be used for negative Y direction.
   @param width    Panel width in mm, corresponds to X axis.
   @param height   Panel height in mm, corresponds to Y axis.
   @param center_x Panel center coordinate in mm, X direction.
   @param center_y Panel center coordinate in mm, Y direction.

Member Function Documentation

Get_Pos()

def Touch_Panel_Driver.Touch_Panel.Get_Pos

(

self

)

Generates tuple describing contact position on touch panel.

   @details    This method uses the Scan_x, Scan_y, and Scan_z methods to
               generate a tuple which indicates if there is contact and
               the location of the contact.

   @return     Returns a tuple with (x_position, y_position, contact T/F).

Scan_x()

def Touch_Panel_Driver.Touch_Panel.Scan_x

(

self

)

Finds the x position of contact on touch panel.

   @details    The four touch panel pins are defined to find the x position
               of contact on the touch panel. This requires the positive x
               pin be set to input, x negative pin be set to ground, y
               positive pin be set to analog, and y negative pin be set
               to ADC. The ADC reading is then converted to mm and zeroed
               using the defined panel x center.

   @return     Method returns zeroed x contact position on touch panel.

Scan_y()

def Touch_Panel_Driver.Touch_Panel.Scan_y

(

self

)

Finds the x position of contact on touch panel.

   @details    The four touch panel pins are defined to find the y position
               of contact on the touch panel. This requires the positive y
               pin be set to input, y negative pin be set to ground, x
               positive pin be set to analog, and x negative pin be set
               to ADC. The ADC reading is then converted to mm and zeroed
               using the defined panel y center.

   @return     Method returns zeroed y contact position on touch panel.

Scan_z()

def Touch_Panel_Driver.Touch_Panel.Scan_z

(

self

)

Determines if there is contact on the touch panel.

   @details    The four touch panel pins are defined to determine if the
               touch panel is experiencing contact. This requires the positive y
               pin be set to input, x negative pin be set to ground, x
               positive pin be set to analog, and y negative pin be set
               to ADC. The ADC reading is then converted to mm and zeroed
               using the defined panel y center.

   @return     This method returns either a true or false depending on contact.

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The documentation for this class was generated from the following file:

• Touch_Panel_Driver.py