I'm doing some tests with a PIC16F877A. I need to figure out if I have burned the outputs of SCLK and SDA because I am unable to see any results.
Trying to drive a PCF8574 to interface an LCD 16×2, but if I put the logic analyzer on both feet the signal remains high and flat.
If you give me any ideas to try, thank you for your help.
I didn't get to that point, I was luckier. Now I see the light at the end of the tunnel. The lucky star gives me a hand. Maybe because I changed the pullup resistors from 4k7 to 10k.
I am at the second stage to understand which address I should apply for. If I do the test with arducoso, gives me 0x27, if I do it with the PIC it gives me 0x47.
Eventually I should find the way to turn on the display and see the message 😛