Trying to Communicate between an STM32F411 ( i2C Master ) and a PIC12F1840 i2C Slave .
I2C has 3 working Devices when I add the PIC18F1840 Slave and try to Scan for devices
it Replies with an ACK and then it shorts the SCK to GND and nothing works after that .
In my PIC Program I only INIT I2c and Put the MCU in a loop .
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Last edited by Alan_37 on Sun Jun 23, 2024 12:33 pm, edited 2 times in total.
I know this is for pic acting as slave - but see viewtopic.php?f=6&t=2598 - where we hit the same issue with connecting two AVR MCUs.
We got around by using the twi interrupt - and the pic maybe has something similar..
I know this is for pic acting as slave - but see viewtopic.php?f=6&t=2598 - where we hit the same issue with connecting two AVR MCUs.
We got around by using the twi interrupt - and the pic maybe has something similar..
Martin
A Two wire interrupt , I think would be a custom interrupt , I am using i2c Channel 1 but I don't know how that would
work .
Following on from Martin above, I was messing with I2C slave a while back and can't remember offhand when / why, but I do recall that I used the SSP interrupt on a PIC (not every PIC has this feature). Can't really remember much more, or if I actually succeeded in doing what I wanted, but I do know that I had to use the SSP.
