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Character Table LookUp...

 
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NeoMatrix



Joined: 03 May 2005
Posts: 23

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Character Table LookUp...
PostPosted: Wed May 11, 2005 2:17 am     Reply with quote
Hello Everyone

Can anybedy tell me how can i find particular character in the character table

ex: if i write the function like this Display("A") how can i find that character in this character table
Code:

unsigned char const font5x7_1[] = {
0x7E, 0x11, 0x11, 0x11, 0x7E , // A
0x7F, 0x49, 0x49, 0x49, 0x36 , // B
0x3E, 0x41, 0x41, 0x41, 0x22 , // C
0x7F, 0x41, 0x41, 0x22, 0x1C , // D
0x7F, 0x49, 0x49, 0x49, 0x41 , // E
0x7F, 0x09, 0x09, 0x09, 0x01 , // F
0x3E, 0x41, 0x49, 0x49, 0x7A , // G
0x7F, 0x04, 0x08, 0x10, 0x7F , // N
0x3E, 0x41, 0x41, 0x41, 0x3E , // O
0x7F, 0x09, 0x09, 0x09, 0x06 , // P
0x3E, 0x41, 0x51, 0x21, 0x5E , // Q
0x7F, 0x09, 0x19, 0x29, 0x46 , // R
0x46, 0x49, 0x49, 0x49, 0x31 , // S
0x01, 0x01, 0x7F, 0x01, 0x01 , // T
0x3F, 0x40, 0x40, 0x40, 0x3F , // U
0x1F, 0x20, 0x40, 0x20, 0x1F , // V
0x3F, 0x40, 0x38, 0x40, 0x3F , // W
0x63, 0x14, 0x08, 0x14, 0x63 , // X
0x07, 0x08, 0x70, 0x08, 0x07 , // Y
0x61, 0x51, 0x49, 0x45, 0x43 , // Z
0x00, 0x7F, 0x41, 0x41, 0x00 , // [
0x55, 0x2A, 0x55, 0x2A, 0x55 , // 55

0x20, 0x40, 0x44, 0x3D, 0x00 } ; // j




any help is appreciated

Thank You So much

waiting for the reply...
Ttelmah
Guest
PostPosted: Wed May 11, 2005 4:07 am     Reply with quote
The numeric 'index' of the data, will be obtained like:
Code:

void Display(int val) {
   int8 index;
   int8 data;
   int8 ctr;
   index=(val-'A')*5;
   //At this point, 'index' will be pointing at the first array entry for
   //the character matrix. So:
   for (ctr=index;ctr<index+5;ctr++) {
      data=font5x7_1[ctr];
      //output the data as required here
   }
   //Will access the five bytes
}

This will work with the constant string definition, if coded to use an integer, since CCS has a code 'shortcut', tha calls the funtion repeatedly for each byte in the constant string. It will also work with:
Display("This is a test");
With the compiler automatically calling the code for each byte.

Best Wishes
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