JTable :: Row Selection Method

Created By: Hussein Nosair

This code is not tested yet.

   1: int row = Integer.parseInt(JOptionPane.showInputDialog("Enter Row"));

   2: jTable1.setRowSelectionInterval(row, row);

How to Display Hex number on a LCD Screen

Created By: Hussein Nosair

Technorati Tags: Microchip,PIC,LCD,Hex,C

The following routine will aid in displaying a hex value to LCD character display.

   1: /********************************************************************

   2: *       Function Name:  HextoASCII                                  *

   3: *       Return Value:   None                                        *

   4: *       Parameters:     unsigned hex number                         *

   5: *       Description:    This routine will display a hex number on   *

   6: *                       LCD by converting the number to ASCII       *

   7: ********************************************************************/

   8: void HextoASCII(unsigned char *hex)

   9: {

  10:     unsigned char temp_L;           // dummy variable that will hold LSBs of Hex number

  11:     unsigned char temp_H;           // dummy variable that will hold MSBs of Hex number

  12:     

  13:     temp_H = *hex & 0xF0;           // Obtain the upper 4 bits (MSBs) of hex number

  14:     temp_H = temp_H >> 4;           // 

  15:     if(temp_H >9)                   // Check if the number is a letter

  16:         temp_H += 0x37;             // Convert the number to a letter in ASCII

  17:     else

  18:         temp_H += 0x30;             // Convert the number to ASCII number

  19:  

  20:     LCDWriteData(temp_H);           // Display the number

  21:             

  22:     temp_L = *hex & 0x0F;           // Obtain the lower 4 bits (LSBs) of hex number

  23:     if(temp_L >9)                   // Check if the the number is a letter

  24:         temp_L += 0x37;             // Convert the number to a letter in ASCII

  25:     else

  26:         temp_L += 0x30;             // Convert the number to ASCII number

  27:                         

  28:     LCDWriteData(temp_L);           // Display the number

  29: }   

Ex:

Hex number = 0×3F

1. If try to send 3F to the LCD directly, the LCD will display ? on screen, due to the fact that the LCD uC works with ASCII characters and thus the equivalent character for 3F is ?. CHECK THIS VALUE WITH ASCII TABLE.

2. If try to convert the hex to string/ASCII using itoa(), then the LCD will display the equivalent decimal value of 3F = 63.

3. Using the  above routine :: HextoASCII(0×3F), the LCD will display the 3F on screen.