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Sorry, but wrong.

ROM in CCS does mean to store in ROM. The program memory is a read only memory, so is a ROM. The 'special flash code', is _programming_ code....

Sorry, but that is what I wro ...

But I want all arrays to be store in ROM.
That is why they are const type.

Const does not mean "store in ROM". For a start most processors don't have anything like ROM. Const means var ...

Thank you for the input.

Okay :-| Why do you think you need more SPIs? What restriction is stopping you using just one?

Not sure I could get away with that as I am reading an SD card on one and talking to a codec on the other.

Eh? With reasonable systems design, one SPI port should be able to meet your needs.

You ...

it seems that the 'bkbhit' can receive any character or numbers

No. bkbhit() returns just true (not zero) or false (zero). It tells you whether there are any characters in the buffer. it does not t ...

When compiling the code I get following warning: >>> Warning 225 "C:\Program Files (x86)\PICC\Drivers\modbus_phy_layer_rtu.c" Line 25(1,1): Duplicate #define TICKS_PER_SECOND has b ...

It seems that CCS cannot create a volatile pointer to volatile data as in:

volatile int8 * volatile p;

I think this is correct standard C code, but the compiler doesn't like this. I want to ...

With many SPI devices, for example memories, there is no fixed transfer length as there can be with things like ADCs and DACs. Also with multiple devices on one SPI port it's not so easy to deal with ...

Thats why most of the stuff I've seen give you both swap and comparison performance values.

An important point is that "swaps" and "comparisons" are very implementation dependa ...

If you are having to turn the watchdog on and off then you've got a big design/architecture problem. If you use the watchdog at all, and most people who are using it/having trouble using it on PICs do ...

Hmm, if I'm reading them right, all the 'scope readings show Voh of no more than 2.5V, which would barely be satisfactory at 3.3V Vcc, and totally unacceptable at 5V. If they are a indication of the t ...

Putting parts under PICs just ain't 'right' to me though.....

I'm "only" in my mid to late fifties... With DIP/DIL I totally agree. putting parts under them is often not great. WIth S ...

A does allow 'bad' energy to enter the PIC.
B allows the capacitor to absorb the 'bad' energy BEFORE it enters the PIC.

That's the old way of thinking about it. These days its generally much more ...

I know how hard and slow are floating point value for microcontrollers, but in my current project I have to communicate with PC Software that accept only float or double IEEE754 value over modbus prot ...

This equation will do the job float_val=0.01*I32val;
There is little problem with rounding, from (int32)123456 get (float) 1234.55 but for now it's OK.

You can never precisely divide or multi ...