 | | Many HandyBoard questions (and a few answers)
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I wrote this a few weeks ago, and could not post the darn thing, as lugnet wouldn't let me. Since then, I have answered a few of my questions, and will include them to help others. I now have an unassembeld HB from Acronome, and look forward to (...) (22 years ago, 8-Jan-02, to lugnet.robotics.handyboard)
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| | 2nd expansion board
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Can the handy board drive more than more expansion board (assuming that the Y board-select lines are different)? (22 years ago, 7-Jan-02, to lugnet.robotics.handyboard)
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| | Re: 0x8000 and main()
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Fred, Dan, and Chuck, Thanks to an email from Chuck McManis (thanks, Chuck), I now have a better understanding of what's going on with respect to the main() function and memory location 0x8000. Chuck asked me if the main() function is executed after (...) (22 years ago, 6-Jan-02, to lugnet.robotics.handyboard)
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| | Re: 0x8000 and main()
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Fred and Dan, For some reason, I'm apparently having trouble explaining my findings, doing something wrong -- or not understanding what Fred is telling me. Now that my HB runs " main() " functions just fine upon powerup reset, I did my experiment on (...) (22 years ago, 5-Jan-02, to lugnet.robotics.handyboard)
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| | Re: Devantech SRF04 library for HandyBoard
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Yes -- I am very sorry about this... I just updated the .zip file and it now includes the sonar.c file as well. Regards, Willem "Andrew Vlasov" <vlas@dicomp.ru> wrote in message news:01b101c194fe$98...d4@vlas... (...) (22 years ago, 5-Jan-02, to lugnet.robotics.handyboard)
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| | Re: Devantech SRF04 library for HandyBoard
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Hi, Willem! Sorry, but "sonar_library_1.0.zip" is not full: "sonar.c" not found! And how about Devantech CMPS01 Compass library? It need i2c in HB. Do you plan this? ===...=== Best regards, Andrew. ----- Original Message ----- From: "Willem van (...) (22 years ago, 4-Jan-02, to lugnet.robotics.handyboard)
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| | Re: 2 questions on Polaroid 6500
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Jan, On ribon cable the lead that has the marking is simply there to make it easier to tell what lead is what on the other end. The marked lead usually denotes pin one, but not always. Remember that the drawing is show from a bottom view. Pin 9 is + (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: 0x8000 and main()
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I don't think this is quite it -- IC sets the byte if there's a main fcn. It also sets up some code so that main fcn gets run. Fred (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: 0x8000 and main()
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John, I think it lies in the Pcode, in other words if the pcode sets the 0x8000 to 1 then any program loaded that has main() in it will auto run at startup. If the pcode does NOT set 0x8000 to 1 then no matter what you have loaded as a program it (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | 0x8000 and main()
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Dan, Perhaps I'm misinterpreting what you mean by "a startup program". To me, a "startup program" means there is a file downloaded to the HB that contains a " main() " function, i.e., a function which will automatically be executed upon startup (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | RE: 2 questions on Polaroid 6500
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Hi, Without a 0.1 µF capacitor, your sonar won't work correctly. I don't know why. Martin (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | 2 questions on Polaroid 6500
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Hi, I bought a Polaroid 6500 for x-mas and now I’ve got two questions: 1) In the Handy Board Interfacing Diagram of the Polaroid 6500 at the Handyboard page V+ is connected to the pin 9 of the Polaroid 9-pin connector. But the flat cable to the pin (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: JRM code and Reset
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John, I just did the same test, I think what Fred was saying is that IC sets the 0x8000 to accept a startup program if one is loaded. If I poke a 0 to that address then load any program it sets back to 1. I think he was wandering if your IC version (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: main() Reset -- THE SAGA ENDS !! ---
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Awsome!!! Now we are expecting great things from you :-) -Dan (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | main() Reset -- THE SAGA ENDS !! ---
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Fellow Lugnuts, Doe anyone want to purchase a 74HC244 (U5) that "kinda works" ? YES, YES, believe it or not, U5 was my problem !! The mystery is not totally solved, because even using both a logic probe and an o-scope, I cannot see any indication (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: JRM code and Reset
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Matt, The only mod I've made to my HB is to cut the motor power supply "+" trace and use a separate motor power supply. See my post/response to Dan for my explanation of that. After reading your START button question, I triple checked. I don't (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: JRM code and Reset
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Dan, Yes, I did cut the trace for external motor power. I know the HB and the motor power "+" sources are isolated because I not only checked with a VOM, but I removed the motor supply batteries and when I run my motor test program (remember, no (...) (22 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | Re: JRM code and Reset
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Since it seems like everything else has been checked, I have one other suggestion after looking at my pcode source. If the "start" button on the HB is pressed during power on, the autostart will be disabled. Has your hardware been hacked at all, (...) (22 years ago, 2-Jan-02, to lugnet.robotics.handyboard)
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| | Re: JRM code and Reset
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Wow, What a bugger! This is one of the strangest cases I've seen. Works fine while connected, but not when reset. Works fine on my board either way. Memory and 68HC11 have been traded out. Scope shows no voltage drop at Mem-power durring reset. Both (...) (22 years ago, 2-Jan-02, to lugnet.robotics.handyboard)
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| | Re: IR Routines
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(...) Hi Dave, I uploaded a modified version of those IR routines to handyboard.com as well as the Rug Warrior group ((URL) the RW group, I also have a version of pcode v3.1 with bug fixes and new capabilities. Could you convey this information to (...) (22 years ago, 2-Jan-02, to lugnet.robotics.handyboard)
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