Reversing the joystick axis

JBotAlan · #1 09-02-2005, 19:22

Sorry if I didn't search well enough, but how does one go about reversing the joystick value? I tried a negative, but I realized the pwm value is an unsigned val, what is the math I need to do on the joystick value to make it so foreward is backward and backward is foreward?

Tristan Lall · #2 09-02-2005, 19:34

Code:

#DEFINE PWM_MAX 254
...
pwm01 = PWM_MAX - p1_y //Your joystick 1 y-value is reversed

jgannon · #3 09-02-2005, 19:34

Quote:

Originally Posted by JBotAlan

Sorry if I didn't search well enough, but how does one go about reversing the joystick value? I tried a negative, but I realized the pwm value is an unsigned val, what is the math I need to do on the joystick value to make it so foreward is backward and backward is foreward?

Instead of:

Code:

pwm01=p1_x;

do:

Code:

pwm01=255-p1_x;

Good luck.

pakrat · #4 09-02-2005, 19:47

Quote:

Originally Posted by jgannon

Instead of:

Code:

pwm01=p1_x;

do:

Code:

pwm01=255-p1_x;

Good luck.

Yeah, this worked for us

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Tri-axis Analog Joystick	KVermilion	Control System	5	19-01-2005 00:24
Inverting Y axis on joystick	FormatteD_C	Programming	7	24-02-2004 16:56
Changing 1 joystick code to 2 (rookie team)	Brawler006	Programming	5	20-02-2004 17:00
robot goes haywire with the one joystick default code	Miles	Programming	7	24-01-2003 14:58
switching joystick axis?????	team222badbrad	Technical Discussion	9	16-01-2002 23:07