 | | Re: pbLua PCF8574 SOLVED ?
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(...) Hi, or was it a quirk at my brain to address the i2c-read-address and hope to receive usefull data ? Currently it works for me when using allways the i2c-write address... Are the any demos or samples for NXC, using the PCF8574 ? 1. setting (...) (17 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: NXC - embedded functions failed
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(...) This is definitely a problem in NXC. The problem is that the value of arg "a" (33) to the function Max is being replaced during the second call to Max since it passes 5 into arg "a". It looks like I need to figure out a decent way to implement (...) (17 years ago, 21-May-07, to lugnet.robotics.nxt)
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| | Re: pbLua PCF8574 SOLVED
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(...) Hi, we solved the problem... Lego-Firmware has own brain and handle read/write with own mechanisms ;-( The last read/write bit is handled automatically by lowlevel routines. Reading the same address like writing solves the problem. (...) (17 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | NXC - embedded functions failed
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#include "NXCDefs.h" int Max(int a,int b){ if (a>b) return a; else return b; } task main(){ int Prob=0; Prob = Max(33, Max(5,15)); NumOut(5,LCD_LINE2,false,Prob); //returns 15 WRONG ---...--- Prob = Max(5,15); Prob = Max(33,Prob); (...) (17 years ago, 20-May-07, to lugnet.robotics.nxt)
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| | RE: NXT Programming with C Question
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(...) Ralph and Brian have provided good input that parallels my experience. Here's a little more information. If you have access to the IAR tools you can compile the NXT firmware available in the NXT SDK from LEGO "out of the box". I believe there (...) (17 years ago, 20-May-07, to lugnet.robotics.nxt.nxthacking)
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| | press button to return to pbLua-Interpreter
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Hi Ralph, times ago, you have added the function to power off the NXT by pressing the orange button... But: what about implementing a function to break every running code and return back to interpreter ? It is very useful for debugging and (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt)
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| | Re: pbLua Hardware access
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(...) All the nice IO-Ports of the ARM-CPU, which are connected to external ports :D But now I think, we did not need it any more. You are fast enough with your development and responses. Forget Peek and Poke from good old C64 times ;-) Thanks a lot (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: pbLua PCF8574
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(...) Hi Ralph, we are using this code: collectgarbage( "setpause", 110 ); function setupI2C(port) nxt.InputSetType(port,2) nxt.InputSetDir(port,1,1) nxt.InputSetState(port,1,1) nxt.I2CTimer(3) nxt.I2CInitPins(port) end function ReadPCF(port) (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: NXT Programming with C Question
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(...) Hi there, Thanks for venturing those reasons. I had been thinking that with the release of the NXT firmware that there may be options to compile code that worked directly with the firmware. Cheers (17 years ago, 19-May-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: NXT Programming with C Question
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(...) Hi Thanks for the fast response, I think I'll have a look at the pbLua firmware. What I am working towards is a method of running Haskell programs on the NXT by converting to C bytecodes first. (17 years ago, 19-May-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: NXT Programming with C Question
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(...) I suspect it could, but I'm not sure that's an approach you want to take. For one thing, there's the question of how to address and handle all the special HW that is attached to the ARM inside the NXT... and furthermore communicate with the (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: NXT Programming with C Question
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(...) There's no reason you can't compile straight ANSI C and run it on the NXT. I was doing it last year and ran an ATMEL sample program that turned the NXT into the world's most expensive 256K (not M) Flash drive :-) The hard part is using the (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt.nxthacking)
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| | NXT Programming with C Question
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Hi there: I've been trying to find a method of coding the NXT using C, however the existing languages available, such as RobotC, or NBC/NXC etc all seem to be C-like languages and not ANSI C. This seems to be the trend, but does anyone know why (...) (17 years ago, 19-May-07, to lugnet.robotics.nxt.nxthacking)
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| | Re: pbLua Hardware access
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(...) There are no hidden commands, but if it's ABSOLUTELY necessary I can add peek and poke for bytes, words and longs. This may be more dangerous than it's worth :-) What hardware do you need access to? Ralph (17 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: pbLua PCF8574
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(...) No ideas yet, Christian. I do have a Mindsensors kit here to look at over the weekend. Are you SURE you are sending the correct string to read the registers? Can you post the code you're using for the test here? Cheers, Ralph (17 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | pbLua Hardware access
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Hi, is there a way to access the NXT-hardware directly with pbLua ? Are there any hidden commands to allow this ? Any idea ? Thanks in advance Bye Christian (17 years ago, 18-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | pbLua PCF8574
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Hi, has anybody successfully tried to read ports from I2C connected PCF8574 with pbLua (Beta-8) ? Writing and setting ports is no problem, but reading ports fails. The return value is every times 0 (not NIL) Any idea ? Thanks in advance Bye (...) (17 years ago, 18-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
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| | Re: NXT pbLua Online for testing
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(...) If you like to see how it connected and wired, vistit this URL (URL) blackbox is a Linux-System (running from CF) for NXT-BT/USB communication and CAMserv Bye Christian (17 years ago, 18-May-07, to lugnet.robotics.nxt)
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| | Re: internals
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(...) If you go to (URL) click on the "NXT'reme" button, you will be able to download all sorts of official internals documentation. -- David Schilling (17 years ago, 18-May-07, to lugnet.robotics.nxt)
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| | internals
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I have difficulty in locating info on the internal of the nxt brick. Wonder if anyone may have reference. Thanks in advance! --Elizabeth (17 years ago, 18-May-07, to lugnet.robotics.nxt)
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