Hi Neil,

Have recently gone down the same track, 18LF46K22, MCC & XC8. It took some=
=20
time/effort to figure things out, but between the .c and .h files there is =
kindof enough=20
info to figure out how they work. I agree it could be easier. After some tr=
ial & error it=20
started to fall into place somewhat and I could appreciate that MCC was act=
ually=20
being helpful. Examples:

result =3D ADC_GetConversion(6);	// Get ADC result, channel 6

#define MCP23017	0x20	// I2C address of MCP23017 16bit I/O expander
unsigned char somedata[12] =3D { 0x00,	// Starting from register address 0
0xFF,	// IODIRA	- Direction A all inputs
0x01,	// IODIRB	- Direction B one input
0x00,	// IPOLA	- Input polarity A
0x00,	// IPOLB	- Input polarity B
0xFF,	// GPINTENA	- Interrupt on change A, 8 inputs
0x01,	// GPINTENB	- Interrupt on change B, 1 input
0xFF,	// DEFVALA	- Default value compare A
0xFF,	// DEFVALB	- Default value compare B
0xFF,	// INTCONA	- Interrupt A use DEFVAL
0xFF,	// INTCONB	- Interrupt B use DEFVAL
0x40 };	// IOCON	- INT pins OR'ed
I2C1_MasterWrite(somedata, 12, MCP23017, &I2C_Wflag);	// Send 12 bytes of=20
data to I2C chip to initialize

command =3D 0x12;	// Request key status (inputs)
length =3D 1;		// from I2C port expander chip
I2C1_MasterWrite(&command, length, MCP23017, &I2C_Wflag);
__delay_us(10);
I2C1_MasterRead(I2Cdata, 2, MCP23017, &I2C_Rflag);	// Returned data is in=20
I2Cdata[0] and I2Cdata[1]


On 16 Sep 2018 at 18:36, Neil wrote:

> I need to add I2C functionality to existing code (18F25K42, XC8) and=20
> some libraries for this might be nice for a change of individually=20
> setting registers.
>=20
> However, it seems that Mchip's direction on this is to install MCC, then=
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> let MCC build the code framework their way (similar to PIC32 code=20
> w/Harmony).
> Assuming I'm willing to do that (not sure I am yet), I installed the MCC=
=20
> plugin, but can't find API docs.  Google results indicate that there is=20
> some documentation in the code, but there really isn't. For example, I=20
> have the ADC module setup, but there's nothing that tells me what to=20
> call to select and sample a channel, how to determine completion and=20
> extract the result, etc.
>=20
> Alternatively, can I just include and access the MCC libraries directly=20
> from my own code? If so, where is MCC even installed?
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> Cheers,
> -Neil.
>=20
>=20
> --=20
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> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


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View/change your membership options at
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.