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Index › Programming Questions & Help › Electronics, Serial Library › How to send commands to serial, please help

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How to send commands to serial, please help (Read 2184 times)

zoodo

How to send commands to serial, please help
Nov 30^th, 2009, 1:12pm

Hi there,

i would like to send commands to my SD84 servo controller and get no results Embarrassed

The card i like to use is an FTDI driven USB tool for 84 servo motors
> robot-electronics.co.uk/htm/sd84tech.htm.

1. I can´t configure the serial settings ??? what the hell ..

Is this the right way?..:

myPort = new Serial(this, Serial.list() [1], 115200, 8, N, 2.0);

Serial(parent, name, rate, parity, databits, stopbits)

Why i get the error (Cannot find anything named "N" )??

2. How i can send an Array like this to the Serial {0xAA0xA0, 0x55, 0x01, 0x01, 0x02, 0xDC, 0x05}?

Pleas let me roger that.

Greetings from Germany

stevecooley

Re: How to send commands to serial, please help
Reply #1 - Dec 3^rd, 2009, 5:11pm

hey, I'm certainly no expert, but... unless your device explicitly requires all of that configuration, you may be able to get away with out it.

Code:

myPort = new Serial(this, Serial.list()[1], 115200);

Failing that, try enclosing the the N in quotes,

Code:

myPort = new Serial(this, Serial.list()[1], 115200, 8, "N", 2.0);

I hope that's helpful. It may not be.

zoodo YaBB Newbies Offline Posts: 14	Re: How to send commands to serial, please help Reply #2 - Dec 5^th, 2009, 3:14am Oh thanks, the serial port receive the signal and a green and red LED light up. But the servo does not react How i can send the whole array at once???

zoodo

Re: How to send commands to serial, please help
Reply #3 - Dec 5^th, 2009, 10:35am

OK, thats the way by sending all bytes as a single command.

I think, it is much more faster to send every bytes of one command string as a whole thing. But i don't know how...

import processing.serial.*;

Serial myPort; // Create object from Serial class

void setup()
{
size(200, 200);
// I know that the first port in the serial list on my mac
// is always my FTDI adaptor, so I open Serial.list()[0].
// On Windows machines, this generally opens COM1.
// Open whatever port is the one you're using.
String portName = Serial.list()[0];
myPort = new Serial(this, Serial.list()[0], 115200, 'N', 8, 2.0);

}

void draw() {
background(255);
noLoop();

myPort.write(0xAA);
myPort.write(0xA0);
myPort.write(0x55);
myPort.write(0x04);
myPort.write(1);
myPort.write(1);
myPort.write(25);

myPort.write(0xAA);
myPort.write(0xA0);
myPort.write(0x55);
myPort.write(0x01);
myPort.write(0x01);
myPort.write(0x02);
myPort.write(0xDC);
myPort.write(0x05);

int feedback = myPort.lastChar();
println (feedback);
}

11010011 YaBB Newbies Offline Posts: 2	Re: How to send commands to serial, please help Reply #4 - Dec 5^th, 2009, 12:05pm is there anyway to cut the transmission speed down? myPort = new Serial(this, Serial.list()[0], 115200, 'N', 8, 2.0); /\ \|

zoodo YaBB Newbies Offline Posts: 14	Re: How to send commands to serial, please help Reply #5 - Dec 6^th, 2009, 4:20am Generally this is no problem to set the parameter to 9600 for example. But my device is a SD84 controller card to adjust up to 84 servos or less than 84 and therefor get signals from analog input channels. http://www.robot-electronics.co.uk/htm/sd84tech.htm

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