How to separate math routines?

[E_Blue]

There's any way to have separate math routines for INTs and Main code?
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Electric Blue

[temtronic]

Not too sure what you mean, so please provide an example program that show us. The more you explain the easier and faster we can help.

Also, I'm assuming INTs means Interrupt Service Routines ?

Hmm, which 'math' routines ? If it's simple code, it'd be inline, complex then callable as it becomes more efficient in code space and time.

Jay

[PCM programmer]

See this thread and the links in it.
http://www.ccsinfo.com/forum/viewtopic.php?t=42118

[E_Blue]

@temtronic

I need to use 16bit division and multiplication inside interrupts and in the Main code.

@PCM programmer

I read an tried #org and compile, but the message

Interrupts disabled during call to prevent re-entrancy:

still appear.

I do something like

[Ttelmah]

The USB code contains one 16bit multiplication. So it'll still give the error.

They accept it, since on a PIC18, it uses the hardware multiplier and is only a handful of instruction times.

So I'd not worry about multiplication, but division really should be avoided, just on the grounds of time.

[E_Blue]

I'm not receiving warnings about math yet, I'm asking before implement it to know hot to proceed.

This are all the warning for the current version

>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (ReadByteEE)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (FillBufferEE)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (@PSTRINGC_1801)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (usb_token_reset)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (SaveTime)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (usb_cdc_flush_tx_buffer)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (usb_tbe)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (usb_cdc_get_discard)
>>> Warning 216 "GPRS_2.c" Line 11917(1,2): Interrupts disabled during call to prevent re-entrancy: (CountData)

ReadByteEE, FillBufferEE,,SaveTime and CountData are subroutines and functions maked by me, the rest are from CCS USB library.
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Electric Blue

[Ttelmah]

Yes. These routines are basically 'initialisation'. So (for instance) the routine that clears the buffer is only called in the main code, when USB first wakes. Hence there is no loss really in having interrupts disabled during it. It's used in the interrupts when a bus reset has to take place. You can simply duplicate it if required, but it gains nothing to do so.

I'd worry about anything involving 'EE' in an interrupt though. Given the milliseconds most types of electrically erasable memory take, that has alarm bells ringing....