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Problem on reading pin.

dinh vuong anh

I use a LCD 1261B and I don't know why I can both read and write to the LCD in ASM but I can only write but not read from LCD(even I set bit to make the pin ready to read).Do any of you have any idea or solution to my problem?.

Parents
  • 0 in reply to Andy Neil

    If you need to produce precise timing by counting instruction cycles, you must do it in assembler. You simply do not have that level of control in 'C' - that is the whole point of high-level languages!
    117% agreed. an addition: After I got on trouble once stealing my own code for another project I now surround all timing defines with a define of the oscillator frequency

    #ifdef CLOCK49M
#define DELAY_1_COUNT 47
#endif

    Erik

Reply
  • 0 in reply to Andy Neil

    If you need to produce precise timing by counting instruction cycles, you must do it in assembler. You simply do not have that level of control in 'C' - that is the whole point of high-level languages!
    117% agreed. an addition: After I got on trouble once stealing my own code for another project I now surround all timing defines with a define of the oscillator frequency

    #ifdef CLOCK49M
#define DELAY_1_COUNT 47
#endif

    Erik

Children
  • 0 in reply to erik malund 

    #ifdef CLOCK49M
#define DELAY_1_COUNT 47
#endif
    [Rant]
    It would be SOOooooooooooooo useful if uVision made the Crystal Frequency value from its config dialogue available to the Compiler; eg, via a predefined macro like __XTAL__

    Similarly for other options in the Project dialogues...
    [/Rant]