HMI Hardware and software...

Hitec robotics including ROBONOVA humanoid, HSR-8498HB servos, MR C-3024 Controllers and RoboBasic
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HMI Hardware and software...

Post by fnastro » Fri Jan 19, 2007 7:21 pm

Post 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??
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??
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Post by i-Bot » Wed Jan 24, 2007 8:04 pm

Post 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.
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.
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Post by fnastro » Fri Jan 26, 2007 2:13 am

Post 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??
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??
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Post by i-Bot » Fri Jan 26, 2007 10:45 am

Post by i-Bot
Fri Jan 26, 2007 10:45 am

Which mode do you want to work in ? Do you just want position, or also to set speed and read current ?

Do you want to control more than one servo ? Hitec have not told us how to change the servo ID, so daisy chain is not yet possible.
Which mode do you want to work in ? Do you just want position, or also to set speed and read current ?

Do you want to control more than one servo ? Hitec have not told us how to change the servo ID, so daisy chain is not yet possible.
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Post by fnastro » Sat Jan 27, 2007 5:34 am

Post 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.....
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.....
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Post by Fritzoid » Thu Feb 01, 2007 2:40 pm

Post 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.
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.
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