RIP Sir Clive Sinclair 1940 - 2021
https://theqlforum.com/
The IC is blank (same on all 5), this is an image of the board with IC (taken before I changed the ID)Pr0f wrote: Mon Sep 08, 2025 1:04 pm Have you got a picture of the chip to see what the label looks like?
You did mention the possibility of them being suspect...
With a bright light the text is visiblePr0f wrote: Mon Sep 08, 2025 1:04 pm Have you got a picture of the chip to see what the label looks like?
You did mention the possibility of them being suspect...
Code: Select all
100 WHEN ERRor
110 f=0
120 CONTINUE
130 END WHEN
140 CLS: PRINT "SCAN STARTING"
150 c$=CHR$(164) & CHR$(255)
160 FOR x = 8 TO 119
170 f=1
180 r$=I2C_IO(c$,0,x,0)
190 IF f=1 THEN
200 PRINT "Device Found at " & HEX$(x,8) & " (" & HEX$(x*2,8) & ") ";
210 SELect ON x
220 = HEX('20') TO HEX('27'): PRINT "PCF8574 TI (LCD)"
230 = HEX('40'): PRINT "HTU21D"
240 = HEX('50'): PRINT "Minerva NVRAM"
250 = HEX('50') TO HEX('57'): PRINT "AT24C256 (32K)"
260 REMark = HEX('23'), HEX('5C'): PRINT "BH1750 (LUX)"
270 = REMAINDER : PRINT "UNKNOWN"
280 END SELect
290 END IF
300 NEXT x
310 PRINT "SCAN COMPLETE"
Does it have flashing lights? Controlled by I2C?XorA wrote: Mon Sep 08, 2025 12:18 pm I think we should get you a "Member of the I2C Club" badge now
My bad, wrong thread! It's at viewtopic.php?p=66959#p66959 if you still need or want it.t0nyt wrote: Mon Sep 08, 2025 7:33 amI thought you had, but damned if I can find itNormanDunbar wrote: Mon Sep 08, 2025 7:30 am Exactly. I laid out the pseudo code for a scanner near the start of this thread
Thanks Norm. I went back and looked at that thread and still didn't see it. DohNormanDunbar wrote: Mon Sep 08, 2025 5:33 pmMy bad, wrong thread! It's at viewtopic.php?p=66959#p66959 if you still need or want it.t0nyt wrote: Mon Sep 08, 2025 7:33 amI thought you had, but damned if I can find itNormanDunbar wrote: Mon Sep 08, 2025 7:30 am Exactly. I laid out the pseudo code for a scanner near the start of this thread
Cheers,
Norm.
So if my conversions are correct the valid addresses run from 8 to 119, will adjust the scanner code thanksXorA wrote: Mon Sep 08, 2025 10:46 am No idea on your problem!
But not all i2c addresses are valid so you can speed up your loop by skipping the invalid ones!
https://www.i2c-bus.org/addressing/
The K prefix seems to be used by several manufacturers - Not sure on the other codes under the part number - usually this year and month of manufacture. With some chips I've seen surface colouration changes that seem to suggest laser etching of the original part number and then printing over the top - but I'd have to say that's probably not the case here - the one that works - that's responding as your would expect, all be it to 2 addresses.
Time to learn about i2c muxes thent0nyt wrote: Tue Sep 09, 2025 1:27 pm Damn, I now have 2 different devices using the same address ID and neither has the option to change the address ID