CFA-633 Displaying Special Characters

[mt1124cr]

Hi,

I see in the data sheet for CFA-633 how to store special characters (command 9) to CGRAM. I could not find any reference on how to display the special characters for instance in a "send data to LCD" command. I am also presuming that to get the characters in the CGROM map, one would use the reference given in the character map ie b00010011 for the number 1.

Thanks

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[CF Tech]

The CGRAM characters appear in location 0 to 7 (and are aliased at locations 8 to 15) of the character map. So just send out 0 to show the first custom character, 1 to display the second . . .

 

[bryancan]

C example of special character

I see the documentation on where cgram is and what type etc, but I'm still too dense I guess to make it happen in my C app...

Anyone have a short snip that shows me how to define a cgram character and how to send it to the lcd (633)

 

[CF Tech]

This post:

https://forum.crystalfontz.com/showthread.php?p=22757#post22757

Has some sample C code that defines and displays the custom characters on a CFA-635. It will be identical on a CFA-633.

 

[smarx87]

Here's what I'm doing in a nutshell, and it isn't working. The last part, where it sends the character, is producing a glyph on the LCD, but the first part, where I'm trying to change the CGRAM, isn't working. This code is leveraging the cf_linux_examples.tgz that is being distributed with the CFA-634.

unsigned char CGRAM128_STRING[10] = { 25, 128, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x3F };
char str[20];
Serial_Init("/dev/ttyUSB0",baud);
//First turn off "scroll" and "wrap"
SendByte(20);
SendByte(24);

SendData(CGRAM128_STRING, 10);
sprintf(str,"%c", 128);
SendString(str);


The link provided for the utilities is leading to tools to make 5x7 rather than 6x8 glyphs, by the way.