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 Robotics / NXT / 739 (-5)
  Re: pbLua PCF8574 SOLVED
 
(...) 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. (...) (19 years ago, 21-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
 
  NXC - embedded functions failed
 
#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); (...) (19 years ago, 20-May-07, to lugnet.robotics.nxt)
 
  press button to return to pbLua-Interpreter
 
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 (...) (19 years ago, 19-May-07, to lugnet.robotics.nxt)
 
  Re: pbLua Hardware access
 
(...) 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 (...) (19 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)
 
  Re: pbLua PCF8574
 
(...) 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) (...) (19 years ago, 19-May-07, to lugnet.robotics.nxt, lugnet.robotics.nxt.nxthacking)


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