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Have you tried splitting the transfer?.

putc ('d');

// Frame (F) - one empty frame of at least 48 CLKs
output_low (SlaveSelectPin);

spi_xfer (A ...

I just cut your code down to a mini test version, and ran it on your compiler
version:

#include <main64.h> //processor clock etc..

void main(void)
{
int16 g_stADCDataQ; ...

How are you seeing this?. If using an IDE, you need to be very careful of
how it thinks the data is declared. MPLAB has problems with this.
This was described here:

http://www.ccsinfo.com/forum/ ...

What version of the TCP/IP stack?.
On the current versions you have to call DNSBeginUsage before callingDNSResolve (thenDNSEndUsage after all the DNS transactions).
The older stack did not need thi ...

In Linux it is relatively easy. You don't make a composite device. You just
make it a communications class device, with two instances.
That worked straight away for me in Linux.
That is the botto ...

Done a look back at my notes, and I had to set the device up as
'Miscellaneous', not as a standard COM port. Device class 0xEF.

This is how I had to do it:

https://stackoverflow.com/questions/ ...

Have to wonder why you are using the '<>' brackets rather than the inverted commas for this file?. I'm suspecting it is finding the wrong file, So it is
loading another 'funstions.c' than the ...

So, as I said, you need to show us the first few lines of this file,

Two things.

First, your include of the lcd driver should be after the fuses.
The sequence should always be:

Processor
Fuses
Clock

Then and only then other includes.

The fuses and clock ...

Yes, _BUT_, it can't be done using the standard Windows ubser.sys CDC
driver. This is limited to one port per USB device.
This is why third party units giving multiple ports use their own drivers
f ...

CDC (so normally serial), rather than Mice. Multiple serial ports are not a
lot of work especially on a PIC24.

Do the remark then. You can put this as the first line in the file, and
can make it always exactly the same format. Makes checking it much
easier.

Have you thoroughly checked the errata for your particular PIC?.
There are odd ones on some chips that can lead to a processor hang.

The short delay, is the inter packet delay, not the inter frame delay. They
just have the inter packet delay, so you can then send another packet
straight away. A long inter frame delay tends to be ...

I have done this years ago, with the CCS library. It can be made to work.
However assuming you are using Windows, usbser.sys, is limited to
supporting a single serial device from a single USB inte ...