Hello Jan, > The i2c scanner is seeing $38, should i still shift to $70? Don't be afraid of just trying this. There is nothing that breaks, if you happen to use a different i2c address.
So I dont' think so, but let me check > | $ ls -l /dev/ttyUSB0 > | crw-rw---- 1 root dialout 188, 0 2018-11-10 18:33 /dev/ttyUSB0 > | $ minicom -wo -b 115200 -D /dev/ttyUSB0 > | ok > | > +i2c > | ok > | > hex i2c.scan > | 50 > | ok > | > i2c_addr_rtc . > | 50 ok > | > i2c.detect > | 0 1 2 3 4 5 6 7 8 9 A B C D E F > | 0: -- -- -- -- -- -- -- -- -- > | 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > | 70: -- -- -- -- -- -- -- -- > | ok In that case the address is good. At least as long as you use your-amforth/trunk/common/lib/hardware/i2c.frt and its includes. Dealing with unresponsive hardware is always a little challenging, because you don't /see/ anything for a long time. A few ideas: - does the hw work with another program? (then the hw is good) - can you successfully talk to another component on the i2c? - can you add an LED to SCL and SDA and see, whether both are blinking when accessing the bus? Kind of poor mans oscilloscope ... - did you check that the TWI unit is initialized correctly? - did you try a different bus speed, eg. 100 kHz instead of 400? - does your code read the ACKs on the bus correctly (yes, if you use the above mentioned libs) - none of the above ... Things like that. Don't despair! And don't panic either :-) It took me something like a month to get a 434 MHz radio link to work. Mainly because i didn't /see/ anything! In the end a 20 Eu TV USB dongle and gnuradio made me see the signal. Cheers, Erich <snip> _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
