320x240 LCD Display, SED1335 (RAiO RA8835) controller interfaced with ATmega32

[jhankhana]

I am working with 320x240 LCD Display, SED1335 (RAiO RA8835) controller interfaced with ATmega32. I am able to display text data with default font but not able to display with other fonts and also I am not able to display the image on LCD.
I have used Universal C library for SED1335/RA8835/S1D13700 LCD displays (dxp.pl)

It would be great if can have guidance for the same

 

[Harald Kapp]

The datasheet for the controller states in chapter 10 that for fonts other than the standard font you will have to add an external character generator ROM. I suppose that is not possible in your case.
You can use any font by rendering it as graphic on the µC.

 

[jhankhana]

Thank you so much for the reply.

char can be displayed by the below function but the problem is..... have to give 39 times 0 data {that is for(int j=0; j<((320-h)/8); j++} GLCD_WriteData(0);} . and that second or next char can not be displayed beside the first one. The next char goes to the next line.

and if I use for loop{for(int j=0;j<48;j++)} it displayed the same char in the whole line repeatedly. and the next char goes to the next line.


void GLCD_WriteChar( char charToWrite)
{
GLCD_WriteCommand(SED1335_MWRITE);

int h=8, w=16;
charToWrite -= 31;

for(int k = 0; k <16 ; k++)
{
//for(int j=0;j<48;j++)

GLCD_WriteData(GLCD_ReadByteFromROMMemory(( char *)((int) FONT8x16 + (((((w) * charToWrite) + (k)) )))));

for(int j=0; j<((320-h)/8); j++)
GLCD_WriteData(0);
}


It would be great if I can have help regarding the same.

 

[Harald Kapp]

problem is..... have to give 39 times 0 data

Sorry, I don't understand what you mean by this?
Do you want to write a character into a new line?
Maybe a graphic example of what you want to do could help.

 

[jhankhana]

I want to write one string in a single line that is
hello

but what happens is ...
h
e
l
l
o

 

[jhankhana]

//function to write char :

void GLCD_WriteChar( char charToWrite)
{
GLCD_WriteCommand(SED1335_MWRITE);

int h=8, w=16;
charToWrite -= 31;

for(int k = 0; k <16 ; k++)
{
for(int j=0;j<48;j++)

GLCD_WriteData(GLCD_ReadByteFromROMMemory(( char *)((int) FONT8x16 + (((((w) * charToWrite) + (k)) )))));

//for(int j=0; j<((320-h)/8); j++)
//GLCD_WriteData(0);
}
//GLCD_GraphicGoTo(1,0);
}


//function to write string:
void GLCD_WriteString(char * stringToWrite)
{
while(*stringToWrite)
GLCD_WriteChar(*stringToWrite++);
}

 

[Harald Kapp]

1. Why this loop?

for(int j=0;j<48;j++)

GLCD_WriteData(GLCD_ReadByteFromROMMemory(( char *)((int) FONT8x16 + (((((w) * charToWrite) + (k)) )))));

Since the variable "j" isn't used within the loop, the compiler may as well optimize the loop by removing it completely.

2. Try void GLCD_WriteText(char * tekst) from the library

 

[jhankhana]

1. Why this loop?

for(int j=0;j<48;j++)

GLCD_WriteData(GLCD_ReadByteFromROMMemory(( char *)((int) FONT8x16 + (((((w) * charToWrite) + (k)) )))));

Since the variable "j" isn't used within the loop, the compiler may as well optimize the loop by removing it completely.

2. Try void GLCD_WriteText(char * tekst) from the library

Thank you so much for the reply.
It was solved with the help of command SED1335_CSRW.
and I also used GLCD_WriteText(char * tekst) from the library and ut works completely ok with 8x8 default font but again not able to use 8x16 default font of LCD.