#Arduino pwm pin 11 varspeedservo full
#Arduino pwm pin 11 varspeedservo software
#Arduino pwm pin 11 varspeedservo code

What did the data sheet tell you about the mode of operation of the timer with those settings? When you get into low level timer control with register settings, you need a good understanding of the details. Maybe you could activate another Timer, by uncommenting out another line, and then use the pin of that timer. to analogWrite(240) is about the same pulse widths. Its possible for an Arduino to output PWM at 400Hz with 11-bit resolution.

2) Looking at the library it seems that you can not, or at least not without further modification. I know that the varspeedservo.h library exists but it uses the same principle as standard servo library. The position of the shaft is kept at 10 degrees by default and the Servo PWM input is connected to the 3rd pin of the Arduino Uno. Attached to this message is the library VarSpeedServo, a modified version of the Servo library with one additional function slowmove() which is a replacement of write with an additional speed parameter. the IRremote library, the documentation will tell you which pins it is using. Additional PWM pins Many newer boards support PWM on additional pins, but their use is subject to timer availability.

#Arduino pwm pin 11 varspeedservo code

I was tying to get you to do some research and think, and come up with the answer by yourself rather than just give it to you. 1) Your code will tell you if a pin is being used. The pinouts for many boards specifify the recommended PWM pins with a tilde ( ) symbol: You can find pinouts on Arduino Docs.

#Arduino pwm pin 11 varspeedservo full

The Timer register summarys sheets at reply #18 are a good companion to the full AT328 data sheet.ĭon't know why some of the helpers 'help' with questions not with corrections. When you use fast pwm to OCR2A you can not get variable duty cycle on pin 2A.Īn excellent tutorial on Timers is by Nick Gammon I think that you should be seeing 50% duty cycle at 125Khz. The reason you got output on pin 11 by changing the bit setting of of COM2A from 1 to 0 is that you set that output to toggle on compare match. In phase correct mode with th prescaler set to 1, this produces an output PWM frequency of 31.25kHz: PWM frequency 16MHz / (2 (255 + 1)) 31250Hz 31.25kHz. I forgot about this little trick to get the libraries going with the 1.0+ IDE I was beating my head for an hour,wondering what I am doing wrong, before I read your post.

I just changed WProgram.h to Arduino.h in one of the library files.

OCR2A set the frequency of the Timer repeat. include VarSpeedServo rot1 VarSpeedServo rot2 VarSpeedServo. I see in your code youre using timer 2, an 8-bit timer capable of counting between 0 and 255. Ive used the varspeedservo library in Arduino 1.0.

SoftPWM library does that).With bits set in WGM22 WGM21 and WGM20 you are in the Fast PWM to OCR2A mode. Example: if you want use it along with RH_ASK (radio frequency library) you have an conflict of timer usage and may be needed to change the config of one of them to move to another Timer.Ĥ) Yes (you can get all 20 pins working as PWM if you want. It works for the library itself but may be not at disposal for other libraries or for your code.

#Arduino pwm pin 11 varspeedservo software

Note that internally arduino must use Timer0 to its timing functions (such as delay(), milis(), etc).ġ) Yes, you can since the library is managing your timers it may allocate fine (as software emulation though).Ģ) Yes and No. So pin 9,10 are not available to analoWrite() anymore, resting Timer0 (pins 5,6) and Timer2 (pins 11,3). To do the software PWM the servo library takes over one of the three arduino's timers. Once you read it you may undestand, what is software and hardware PWM and which are the limitations. Inside that library, though, it still uses write () and/or writeMicroseconds () to position the servo. There is a VarSpeedServo LIBRARY with methods to make the servo move at various speeds. For those looking for more information on PWM in arduino, a must see page is this one: There is no Varspedservo function, so no.