ME405_Lab0x02_PartB.py File Reference

Uses an OC/IC method to compute the average reaction time for the user to press a button after an LED turns on. More...

Functions
def	ME405_Lab0x02_PartB.OC_Compare (tim2)
	Callback func. More...
def	ME405_Lab0x02_PartB.IC_Capture (tim2)
	Callback func. More...

Variables
int	ME405_Lab0x02_PartB.successCntr = 0
	A counter that increments each time the user presses the button while the LED is on.
int	ME405_Lab0x02_PartB.failCntr = 0
	A counter that is added to whenever the user mistimes their button press.
	ME405_Lab0x02_PartB.correctPress = None
bool	ME405_Lab0x02_PartB.isBP = False
int	ME405_Lab0x02_PartB.lastCompare = 20000
	Specifies the initial count value at which a compare match will trigger.
	ME405_Lab0x02_PartB.lastCapture = None
	The variable to which the count value associated with the button press will be appended.
int	ME405_Lab0x02_PartB.ledOn = 0
int	ME405_Lab0x02_PartB.ledOff = 0
	ME405_Lab0x02_PartB.pinA5 = pyb.Pin(pyb.Pin.cpu.A5)
	ME405_Lab0x02_PartB.pinB3 = pyb.Pin(pyb.Pin.cpu.B3)
	ME405_Lab0x02_PartB.tim2 = pyb.Timer(2, period = 0xffff, prescaler = 4900)
	Establishes the timer used.
	ME405_Lab0x02_PartB.t2ch2 = tim2.channel(2, pyb.Timer.IC, pin=pinB3, polarity = Timer.FALLING, callback = IC_Capture)
	Sets timer to IC mode, then sets relavant pins, triggering periods, and callbacks.
	ME405_Lab0x02_PartB.t2ch1 = tim2.channel(1, pyb.Timer.OC_TOGGLE, pin=pinA5, callback = OC_Compare)
	Sets timer to OC mode, then sets relavant pins, triggering periods, and callbacks.
int	ME405_Lab0x02_PartB.totalGames = successCntr + failCntr
int	ME405_Lab0x02_PartB.rateOfSuccess = successCntr/totalGames
	Tabulates the number of games the user played successfully.

Detailed Description

Uses an OC/IC method to compute the average reaction time for the user to press a button after an LED turns on.

source code: https://bitbucket.org/nicho755/me-305-labs/src/master/ME405_Lab0x02_ThinkFast/ME405_Lab0x02_PartB.py

Author

Nicholas Greco, Davide Lanfranconi

Date

05/02/21

Function Documentation

IC_Capture()

def ME405_Lab0x02_PartB.IC_Capture

(

tim2

)

Callback func.

that triggers when the button is pressed

The input capture function sets the value of a lastCapture variable to the time when the button was pressed. Additionally, it sets a global variable serving as a conditional to a value of "True", which will be used in the OC_Compare callback to evaluate if the button was pressed in the appropriate amount of time.

OC_Compare()

def ME405_Lab0x02_PartB.OC_Compare

(

tim2

)

Callback func.

that sets output compare value and evaluates button push

A collection of global variables are used to evaluate whether or not the button was pushed at the appropriate time. The LED is cycled in 1 seocnd intervals. While the LED is on, if the user hits the button, their victory will be recorded.