Text onto LCD display

[lewjoubert]

Hope someone can help... if possible.
I need to read a byte from EEprom and display the equivalent ASCII characters on a LCD.
EG: Stored in EEprom, ABCDEFGHIJKLMNOP (16 chars),stored as hex values.
I read the values from EEprom addresses OK and store them in Bytes.
I then use the ByteToStr function to what I would expect to convert these values to the string representations of the byte value.
When I display these converted values on the LCD, I get the decimal values displayed!?
Example, 0x4C in EEprom gets displayed as 76.
I have 'played' with various ideas, Ord(), Chr(), altering the variables to store the data between array and string etc., but still no luck.
Hopefully I have explained accurately what I am attempting to achieve - HELP

[hadv]

What do you mean when you write "stored as hex values"? Do you use two bytes for each character?

ByteToStr will output the numerical representation of the byte.
Assuming your bytes are already in the valid ascii-range, like your example 0x4C, you can just use Lcd_Chr.

[janni]

I have 'played' with various ideas, Ord(), Chr()...

Formally, when storing chars in EEPROM and then reading and sending them to LCD one indeed should use these functions

Code: Select all

var ch:char;

EEPROM_Write(addr, ord(ch));
...
ch:=chr(EEPROM_Read(addr));
Lcd_Chr(row, column, ord(ch));

In practice, as there's no difference in mP between char and byte (character is always stored as its ordinal value), one may skip the formal type changes.

[lewjoubert]

Thanks for assistance Jani, problem solved.
Ended up with this (skeleton code):-

NOTE: 2 Line 16 character LCD

var
w1-16, z1-16 : char;
txt2:string[16];
....
z1-16 := EEPROM_Read(addresses 1- 16);
w1-16:= ord(z1-16);
txt2 := chr(w1)+chr(w2)+chr(w3)...+chr(w16)
LCD_Out(2,1,' ');
LCD_Out(2,1,txt2);