9 replies to this topic

[swestcott]

I am using the http://www.sparkfun....roducts_id=9896 so have this code very simple using System; using System.Threading; using Microsoft.SPOT; using Microsoft.SPOT.Hardware; using SecretLabs.NETMF.Hardware; using SecretLabs.NETMF.Hardware.Netduino; namespace NetduinoApplication1 { public class Program { public static void Main() { // write your code here OutputPort Motor1 = new OutputPort(Pins.GPIO_PIN_D12, false); OutputPort Motor2 = new OutputPort(Pins.GPIO_PIN_D13, false); while (true) { Motor1.Write(true); Thread.Sleep(500); Motor1.Write(false); Motor2.Write(true); Thread.Sleep(500); Motor2.Write(false); } } } } and this turns the motors on and off moving it forward how do you make one motor reverse so it will make a turn and I played a bit with PWM to control speed but maybe I am missing something as it will load but the speed does not seem to change PWM pwm1 = new PWM.PWM(Pins.GPIO_PIN_D3, Pins.GPIO_PIN_D11); gets error Error 1 The type name 'PWM' does not exist in the type 'SecretLabs.NETMF.Hardware.PWM' and well I am lost on how to set the speed after that just a bit of weekend fun

[bill.french]

Your syntax is wrong: PWM pwm1 = new PWM(Pins.GPIO_PIN_D3); PWM pwm2 = new PWM(Pins.GPIO_PIN_D11); I think is more what you want?

[swestcott]

Your syntax is wrong:
PWM pwm1 = new PWM(Pins.GPIO_PIN_D3);
PWM pwm2 = new PWM(Pins.GPIO_PIN_D11);

I think is more what you want?

cool thanks I tried that as well I think I am not using it correctly later on not to sure where to reference the duty cycle if thats what I am supposed to do


get this error

An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in SecretLabs.NETMF.Hardware.dll
I think this means I am not defining later in the code what I want pwm1 and pwm2 values to be so I tried this well ...lets take a look

// write your code here

PWM pwm1 = new PWM(Pins.GPIO_PIN_D3);
PWM pwm2 = new PWM(Pins.GPIO_PIN_D11);

OutputPort Motor1 = new OutputPort(Pins.GPIO_PIN_D12, false);
OutputPort Motor2 = new OutputPort(Pins.GPIO_PIN_D13, false);



while (true)
{
Motor1.Write(true);
pwm1.SetDutyCycle(100);
Thread.Sleep(500);
Motor1.Write(false);
Motor2.Write(true);
pwm2.SetDutyCycle(100);
Thread.Sleep(500);
Motor2.Write(false);

}

but I don't think thats where it is supposed to go

[Chris Walker]

Which line of code gives you the exception?

[bill.french]

I didn't catch this the first time, but I think PWM is only supported on pins 5,6,9,10 -- not 3 and 11. Specs are here: http://www.netduino....duino/specs.htm digital i/o features ● all 20 digital and analog pins: GPIO ● digital pins 0-1: UART 1 RX, TX ● digital pins 2-3: UART 2 RX, TX ● digital pins 5-6: PWM, PWM ● digital pins 7-8: UART 2 RTS, CTS ● digital pins 9-10: PWM, PWM ● digital pins 11-13: SPI MOSI, MISO, SPCK ● analog pins 4-5: I2C SDA, SCL

[swestcott]

I didn't catch this the first time, but I think PWM is only supported on pins 5,6,9,10 -- not 3 and 11.

Specs are here: http://www.netduino....duino/specs.htm

digital i/o features
● all 20 digital and analog pins: GPIO
● digital pins 0-1: UART 1 RX, TX
● digital pins 2-3: UART 2 RX, TX
● digital pins 5-6: PWM, PWM
● digital pins 7-8: UART 2 RTS, CTS
● digital pins 9-10: PWM, PWM
● digital pins 11-13: SPI MOSI, MISO, SPCK
● analog pins 4-5: I2C SDA, SCL

cool that was it wrong pin thanks for the help

[bill.french]

Sorry I didn't notice originally! Just FYI, the "outofrange" exception made me think you were trying to access some capability outside of the range where it was possible.

[swestcott]

this is what I have it is hard to tell is the motors are running slower until I have it on the ground but no errors using System; using System.Threading; using Microsoft.SPOT; using Microsoft.SPOT.Hardware; using SecretLabs.NETMF.Hardware; using SecretLabs.NETMF.Hardware.Netduino; namespace NetduinoApplication1 { public class Program { public static void Main() { // write your code here PWM pwm1 = new PWM(Pins.GPIO_PIN_D6); PWM pwm2 = new PWM(Pins.GPIO_PIN_D9); OutputPort Motor1 = new OutputPort(Pins.GPIO_PIN_D12, false); OutputPort Motor2 = new OutputPort(Pins.GPIO_PIN_D13, false); while (true) { pwm2.SetDutyCycle(100); pwm1.SetDutyCycle(100); Motor1.Write(true); Motor2.Write(true); Thread.Sleep(5000); pwm2.SetDutyCycle(100); pwm1.SetDutyCycle(100); Motor1.Write(false); Motor2.Write(false); Thread.Sleep(5000); } } } } I cut and jumper-ed the pins on the motor shield to get them to line up I am using an old base from a TAB book on the basic stamp take a look

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[wood]

this is what I have it is hard to tell is the motors are running slower until I have it on the ground but no errors

using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;

namespace NetduinoApplication1
{
public class Program
{
public static void Main()
{
// write your code here

PWM pwm1 = new PWM(Pins.GPIO_PIN_D6);
PWM pwm2 = new PWM(Pins.GPIO_PIN_D9);

OutputPort Motor1 = new OutputPort(Pins.GPIO_PIN_D12, false);
OutputPort Motor2 = new OutputPort(Pins.GPIO_PIN_D13, false);



while (true)
{
pwm2.SetDutyCycle(100);
pwm1.SetDutyCycle(100);
Motor1.Write(true);
Motor2.Write(true);
Thread.Sleep(5000);

pwm2.SetDutyCycle(100);
pwm1.SetDutyCycle(100);
Motor1.Write(false);
Motor2.Write(false);
Thread.Sleep(5000);



}





}

}
}

I cut and jumper-ed the pins on the motor shield to get them to line up I am using an old base from a TAB book on the basic stamp take a look

I started a post to learn how to get my "Adafruit Motor Shield" to work but maybe you can help. How do I know what port on my shield is which. Also, do I need a different driver. I was told "4 PWM, not 6..." and I may have to make a driver.

Here's my post: http://forums.netdui...t=668&qpid=4916

[Azzmodious]

Thanks guys for clearing up the whole PWM pin mismatch. I was close to tossing out my netduino. Using the above program, I got a motor to move in one direction and then stop (repeat). How do I get the motor to actually reverse direction? Thanks in Advance!