Assembler to C code

[PabloA]

Hi there, please could somebody help me with this code in Assembler? I have to translate it to C code. It works fine in CodeWarrior for 8 bits microcontrollers, but with ColdFire it don't acept this asm instructions.

The idea is to control an LCD display with just 4 bits of data. To do this I have to Swap Display 8 bits data and write the higher nible first.

char Display_Data;

char PTAD_Data;

  asm

  {

    LDA   PTAD

    AND   #0b11110000     // Mask Non Display Data

    STA   PTAD_Data

    LDA   Display_Data    // Load Display Data

    NSA                        // Set Most Significant Nible First

    AND   #0b00001111     // Clear "Shift_Comp_Data" Bits

    ORA   PTAD_Data

    STA   PTAD            // Set Display Data

  }

Thanks!

Pablo

[kef · Accepted solution]

HI

   PTAD_Data = PTAD & 0xF0;

   PTAD = ((Display_Data >> 4) & 0x0F) | PTAD_Data;

[PabloA]

Edward, Thank you for your time. I will use it!

Best regards!

Pablo