October 2009
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I seem to have developed something remarkably similar to the SSC 32
I was looking for information to help me decide which servos to buy for the legs; wondering about torque and cost and whatever when I followed a link to the Lynxmotion site and came across the documentation for their SSC 32 servo … -
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Serial communications issues
I’ve just spent a while tracking down a but which ended up being in my PC based control software rather than in the serial servo controller firmware. The symptoms of the problem were that my servo controller would suddenly to process … -
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Flow control is the key?
I posted a question about my serial communications issues over on AVRFreaks and so far the answers have been pointing in the direction of including some form of formalised flow control. This makes sense. I’ve yet to decide if hardware … -
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New design please...
Having discussed my serial communication issues on AVRFreaks I’ve decided that I need a new design for the servo controller. My current design is very successful in doing what I set out to do, which was to give priority to the PWM … -
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Almost there....
Work on the latest version of the serial servo controller is going well. I’d accumulated a pile of random nice to have ideas, some of which then necessitated some other ideas, and then there was the one must have command (the one … -
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Moving multiple servos at once
The final command for my serial servo controller is the most complex. The idea behind it is that with a hexapod leg you will want to be able to move the leg to a new position where the new position requires all three of the servos that … -
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After the servo controller
The work on turning my excel spreadsheet into AVR assembler code which can move multiple servos to arrive at their target locations at the same time is proceeding well. I have the required code operating in a stand alone environment in the … -
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Integrating the multi-move command
I’m in the process of integrating the stand alone code that implements my ‘multi-servo move’ command and the rest of the controller. It’s harder than it should be, probably because I’m not experienced enough … -
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Unit testing AVR assembly language
Way back at the beginning of this journey I mentioned the fact that I’d quite like to be able to use some of the development disciplines that I use in my day job during the development of the firmware for my hexapod. Now that … -
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Repeatable Unit Testing with AVR Assembler and AVR Studio
As I mentioned yesterday the servo controller project has got to the point where being able to unit test the code would be useful to me. In my day job as a C++ server developer I’ve been using unit tests for several years and most of … -
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Testing, Testing...
The AVR assembly language unit tests that I spoke of last week are going well. I decided to explore the idea of unit testing by writing tests for the easier to test aspects of the serial protocol code and then, as this went well, I decided …
