Hello Jan,
your i2c address: "$38", is this the 7bit address? You might
need to shift it by one position to "$70".
Just an idea.
Cheers,
Erich
Jan Kromhout writes:
> Hi,
>
> This is my first step on the I2C road.
> I have a Gravitech shield for the Arduino, that work well.
> The code is very simple, and I have translate it to Forth.
> The display is not working.
> I include the Forth code. What is wrong?
> Thangs for any help.
>
> Cheers,
>
> Jan
>
> \ Gravitech display, I2C Generic
>
> marker --gravitech--
>
> $38 constant 7SEG \ I2C address for 7-Segment
>
> / Configure 7-Segment to 12mA segment output current, Dynamic mode,
> / and Digits 1, 2, 3 AND 4 are NOT blanked
>
> : init7SEG
> 7SEG i2c.begin
> 0 7SEG i2c.c!
> %01000111 7SEG i2c.c!
> i2c.end
> ;
>
> : Send7SEG ( Digit Number )
> 7SEG i2c.begin
> swap 7SEG i2c.c! \ Digit
> 7SEG i2c.c! \ Number
> i2c.end
> ;
>
>
> /* Configure 7-Segment to 12mA segment output current, Dynamic mode,
> and Digits 1, 2, 3 AND 4 are NOT blanked */
>
> Wire.beginTransmission(_7SEG);
> Wire.write(0);
> Wire.write(B01000111);
> Wire.endTransmission();
>
>
> /***************************************************************************
> Function Name: Send7SEG
>
> Purpose:
> Send I2C commands to drive 7-segment display.
> ****************************************************************************/
>
> void Send7SEG (byte Digit, byte Number)
> {
> Wire.beginTransmission(_7SEG);
> Wire.write(Digit);
> Wire.write(Number);
> Wire.endTransmission();
> }
>
>
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--
May the Forth be with you ...
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