Go To Position command on an 821

eddywright · Post by **eddywright** » Sat May 11, 2002 5:50 pm

Hi, I have one of the 821 LCD displays and it's working great! I'm using I2C to connect it to an Atmel AVR 2313 MCU. I've built a handheld serial terminal.
My only problem is using the Go To Position command. I can't seem to get this to work... I can clear the screen, turn of the cursor, go to upper left, etc. But I just can't get it to accept the go to command.

I'm using Bascom to program the MCU. Here is the code that I'm using:

Sub Line1 'Move cursor to start of line 1
'Device is at address &H5C
I2csend &H5C , 254 'Control Code
I2csend &H5C , 71 'Go To command
I2csend &H5C , 1 'Column 1
I2csend &H5C , 1 'Row 1
Waitms 25
End Sub

Sub Line2 'Move cursor to start of line 2
I2csend &H5C , 254
I2csend &H5C , 71
I2csend &H5C , 1
I2csend &H5C , 2 'Row 2
Waitms 25
End Sub

Post by **Cheese** » Sun May 12, 2002 2:52 am

Isn't the top left 0,0 not 1,1?

Might be the problem...

r.

thrust · Post by **thrust** » Sun May 12, 2002 2:12 pm

Hi!

Top left for positioning the cursor is at 1,1. So that is probably not your problem.

I think it is a funny inconcistency that all graphic commands have it's orgin at 0,0 (On the graphic displays that is)...

/Oskar Sj

eddywright · Post by **eddywright** » Sun May 12, 2002 4:42 pm

I thought about the 1 vs 0, but it didn't make any difference... Besides, it would have at least done something when I issued the col 1, row 1 command.

Strange...

Eddy