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Simple count display on LCD with MSP430FR4133 LaunchPad

Randy Adams80
Intellectual 345 points
Other Parts Discussed in Thread: MSP430FR4133

I Need an example code to display a count though 200 on the LCD when a button is pressed using the MSP430FR4133 Launchpad.

I have one written that when I press the S2 switch It will count to 10.  But I am using if statements.  This seems too cumbersome.  

Thanks for your help.

  • 0
    Guru 298950 points
    Show the relevant part of your code.
  • 0 in reply to Clemens Ladisch
    Intellectual 345 points

    This works, but would like to count in decimal and just convert it to the display.

     

    LCDM0 = 0x21; // L0 = COM0, L1 = COM1

    LCDM1 = 0x84; // L2 = COM2, L3 = COM3

    Ctr=0;

    pos=pos6;

    for (;;) { // Loop forever

    　

    if ((P2IN & SW1) == 0) { // Loop while button down

    //LCDMEMCTL |= LCDCLRM; // Clear LCD memory

    LCDMEM[pos] = digit[Ctr];

    Ctr+=1;

    i=50000;

    LCDCTL0 |= LCD4MUX | LCDON; // Turn on LCD, 4-mux selected

    PMMCTL0_H = PMMPW_H; // Open PMM Registers for write

    PMMCTL0_L |= PMMREGOFF_L; // and set PMMREGOFF

    if(Ctr>9)

    {

    Ctr=0;

    LCDMEM[pos] = digit[Ctr];

    LCDCTL0 |= LCD4MUX | LCDON; // Turn on LCD, 4-mux selected

    PMMCTL0_H = PMMPW_H; // Open PMM Registers for write

    PMMCTL0_L |= PMMREGOFF_L; // and set PMMREGOFF

    }

    if(Ctr==0)

    {

    pos=pos5;

    Ctr=1;

    LCDMEM[pos] = digit[Ctr];

    LCDCTL0 |= LCD4MUX | LCDON; // Turn on LCD, 4-mux selected

    PMMCTL0_H = PMMPW_H; // Open PMM Registers for write

    PMMCTL0_L |= PMMREGOFF_L; // and set PMMREGOFF

    pos=pos6;

    }

    while (i!=0)

    {

    i-=1;

    }

    }

    }

  • 0 in reply to Randy Adams80
    Guru 227245 points
    A more general solution that takes a binary value and shows it as separate decimal digits would be a bit more complex than your code. A simple way would be to 'print' the value into a string using sprintf (include the header file stdio.h).
    unsigned char buffer[6];
    sprintf(buffer,"%5u",Cnt);
    Then you go through buffer[x] and find a space or 0..9 for 5 digits, buffer[0] being the 10000's, buffer[4] being the 1's Cnt may be an unsigned int. If it is a space (32), put a blank into the position, else subtract 48 from the value in buffer[x] for a binary value of 0...9 that you can use to store into the proper position.
    If you use "%05u", then you will get trailing zeros, which spares you checking for space, but looks less nice on the display.

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