HMI Hardware and software...
HMI Hardware and software...
by fnastro
Fri Jan 19, 2007 7:21 pm
I'm looking into the HMI serial protocal to control My RN-1. Does anyone have any information on how to daisy-chain the servos? The documentation says for connection to PC but gives no further hardware connection info. From what I see there is pnly one line available ro the signal. What would the timmings for comunications be? Why has HiTech not made this information available??
by i-Bot
Wed Jan 24, 2007 8:04 pm
Sorry for the delay on this.
I have updated the my information on the HSR8489 to include what I know of HMI. Also my PC test code.
http://robosavvy.com/Builders/i-Bot/HSR ... 0Servo.pdf
I hope it helps.
Any feedback and corrections would be appreciated.
I have updated the my information on the HSR8489 to include what I know of HMI. Also my PC test code.
http://robosavvy.com/Builders/i-Bot/HSR ... 0Servo.pdf
I hope it helps.
Any feedback and corrections would be appreciated.
by fnastro
Fri Jan 26, 2007 2:13 am
Thanks for the documentation. I think I almost got it. I'm mostly a programmer with enough electronics to get my self into trouble. So lets say I want to experiment. I have an AVR 8515 dev board and want to see if I can control 1 servo. I hook up the Servo supply voltage to a 6V battery source +. I hook the grount to the Battery -. Then I connect the signal line to ..... This is where I get lost. If i just connect to the TX I can send commands but how do I receive??
by fnastro
Sat Jan 27, 2007 5:34 am
Ultimately I want to set the position, speed and read the position.
I understand HItech will be coming out with the cable and info on how to change the ID shortly. We at least that is what they said 4 months ago when I first emailed and then again about 2 months ago, and oh yes again this week. Should be any day now.....
I understand HItech will be coming out with the cable and info on how to change the ID shortly. We at least that is what they said 4 months ago when I first emailed and then again about 2 months ago, and oh yes again this week. Should be any day now.....
by Fritzoid
Thu Feb 01, 2007 2:40 pm
Serial cable? We don't need no serial cable!
I just uploaded a demonstration program in AVR assembler that uses the MR-C3024 to send commands to the HSR-8498s in serial mode.
http://robosavvy.com/Builders/Fritzoid/SerialMode.asm
Even if Hitec gets their act together and finally releases the fabled cable, all you get is the ability to move one servo around while it's connected to a PC. And you only need a unique servo ID if you're running a daisy-chained configuration. Well, Hitec isn't even talking about the hardware need to support that. Plus, 16 commands in serial takes over 64 milliseconds but only 4 milliseconds in parallel.
All we really need is complete specs for the servo control code and maybe a fix for the Motor On/Off function.
I just uploaded a demonstration program in AVR assembler that uses the MR-C3024 to send commands to the HSR-8498s in serial mode.
http://robosavvy.com/Builders/Fritzoid/SerialMode.asm
Even if Hitec gets their act together and finally releases the fabled cable, all you get is the ability to move one servo around while it's connected to a PC. And you only need a unique servo ID if you're running a daisy-chained configuration. Well, Hitec isn't even talking about the hardware need to support that. Plus, 16 commands in serial takes over 64 milliseconds but only 4 milliseconds in parallel.
All we really need is complete specs for the servo control code and maybe a fix for the Motor On/Off function.