sending commands using C

ndyguy · Post by **ndyguy** » Sat Feb 03, 2007 4:43 pm

I'm using a LK162-12 and I was wondering if anyone knew how to send commands using C. I've tried

#define command 0xFE
#define clear_screen 0x58

while(1)
{
......display some text.......
......wait a second.............
printf("%X%X", command, clear_screen);
}

but it just displays them as text. Any suggestions?

Raquel · Post by **Raquel** » Tue Feb 06, 2007 10:47 am

Hi ndyguy,

Please take a look at this post (I think it will help you out):

http://www.lcdforums.com/forums/viewtopic.php?t=1553

Best Regards,

ndyguy · Post by **ndyguy** » Fri Feb 09, 2007 4:11 pm

Thanks for the response. The link you gave me seems to be focused on opening COM ports in Windows. What I'm looking for is help on sending raw hex (like 0xFE) in C using a microcontroller. I have the micro connected to the LCD and it's displaying text, but I'm not sure of the best way to send hex commands in C. I thought using a printf statement with %X would do the trick, but it just prints the characters as text on the LCD.

Raquel · Post by **Raquel** » Fri Feb 09, 2007 4:26 pm

What uC are you using?

ndyguy · Post by **ndyguy** » Sat Feb 10, 2007 7:36 am

Atmel ATmega16. http://www.atmel.com/dyn/products/produ ... rt_id=2010

Raquel · Post by **Raquel** » Mon Feb 12, 2007 10:49 am

Hi,

On page 149 of the ATmega16 datasheet, there is a good example of transmitting data (hex data). I am not sure if there are any built-in functions in the software/compiler you are using; but the example on the datasheet is generic and works down to the register levels, so there is a small chance of getting it wrong.

Best Regards,