home/pi/adc.c: In function ‘init_module’: home/pi/adc.c:225:9: warning: '/*' within comment home/pi/adc.c:218:29: error: assignment to ‘unsigned char *’ from incompatible pointer type ‘struct DataStruct *’ home/pi/adc.c:176:13: warning: ISO C90 forbids mixed declarations and code home/pi/adc.c:132:9: warning: useless storage class specifier in empty declaration Make: Entering directory '/usr/src/linux-headers-4.19.97+' partly included because I don't understand why they appeared on Buster but not on Jessie) make -C /lib/modules/4.19.97+/build M=/home/pi modules (I'm not concerned about the warnings/notes, know how to fix them, just the errors. When I installed Raspbian Buster Lite on my Pi, and have been getting multiple errors/warnings when compiling.

It was correctly reading data from the ADCs and storing it in the buffer. I previously was running Raspbian Jessie on my pi and I had NO issues compiling the code (no warnings, no errors).

I'm using a Raspberry Pi Zero W + ADCs to input an analog signal, digitize it, and transmit it wirelessly and the code I'm having issues with takes the data from the GPIOs and stores it in a buffer that I can read from. To summarize my problem, I have code written in C that compiles on Raspbian Jessie, but not Buster Lite. I am very new to C (had one semester class like 5 years ago).

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