[Flashforth-devel] Problems with I2C

[Thomas B. <bus...@gm...>]

Hallo,

I've problems to get my I2C-Master running. Here is my config:

PIC18F2620
Clock 8MHz
OSC = INTIO67
TemperaturSensor: DS1621

Here is what I do:
I connect the sensor SDA with PIC.Pin 15 and the SCL with PIC.PIN 14. I
tested different pullup-resistors on both lines (10K - 3.3K - 1.8K).
I tested different sensor-addresses: 1001 000 (all AddressPINs GND) and
1001 100 (A2 with 10K resisitor to 5V, A1-A0 GND)

I import i2c_base.txt (\flashforth\PIC18\forth) and use the example
from ff-tutorial-guide.pdf.

When I run the "init_(tempsensor)" the PIC reboot. I find out that
":i2cinit" come back with "OK", but when I run ":i2cws" (+ slaveaddr) the
PIC reboot.

I know the Sensors are ok, because I tested them in a selfmade heating
control (since 2010 - written in Ruby - sorry :-)) and I have ca. 10 of
these IC's there.

If I can send any more informations please drop a mail :-)

Thank you
Thomas