Microchip C for dsPICs

[Diver300]

I'm using MPLABX 6.0 to program a dsPIC33CH128MP506.

Does anyone know how to insert bits of assembly language, or how to get the code to perform a software reset?

Also, is there a list of commands for Microchip C?

 

[Nigel Goodwin]

I'm using MPLABX 6.0 to program a dsPIC33CH128MP506.

Does anyone know how to insert bits of assembly language, or how to get the code to perform a software reset?

Also, is there a list of commands for Microchip

Look at the examples out there, in particular the DSP examples use embedded assembler for the speed of the dedicated DSP assembler instructions.

Presumably the XC16 compiler manual lists the compiler instructions, but basically it's just C - again, the examples are probably the most useful thing out there.

However, I've been trying to compile DSP examples with MPLABX using XC16, and I've not having any luck?, they fail like this:

build/default/production/filter_design.o(.text+0x170): In function `.LBB3':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x18e): In function `.LBB3':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x264): In function `.LBB5':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x356): In function `.LBB7':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x3c6): In function `.L21':
: undefined reference to `_Fract2Float'
build/default/production/filter_design.o(.text+0x3ca): In function `.L21':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x3e2): In function `.L19':
: undefined reference to `_Fract2Float'
build/default/production/filter_design.o(.text+0x3ec): In function `.L19':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x4fa): In function `.LBB10':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x5aa): In function `.L31':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x66c): In function `.L29':
: undefined reference to `_Float2Fract'
build/default/production/filter_design.o(.text+0x736): In function `.L30':
: undefined reference to `_Float2Fract'
build/default/production/arduino.o(.text+0x40e): In function `.L58':
: undefined reference to `_timer2_driver_init'
build/default/production/multiply_fract.o(.text+0xfe): In function `_multiply_fractcomplex_by_Q16':
: undefined reference to `__Q16mpy'
build/default/production/multiply_fract.o(.text+0x114): In function `_multiply_fractcomplex_by_Q16':
: undefined reference to `__Q16mpy'
build/default/production/multiply_fract.o(.text+0x19a): In function `_multiply_fract_by_Q16':
: undefined reference to `__Q16mpy'
build/default/production/goertzel.o(.text+0x142): In function `L2':
: undefined reference to `__Q16mpy'
build/default/production/goertzel.o(.text+0x150): In function `L2':
: undefined reference to `__Q16mpy'
build/default/production/misc.o(.text+0x1c): In function `.L2':
: undefined reference to `__Q15abs'
build/default/production/misc.o(.text+0x28): In function `.L2':
: undefined reference to `__Q15atanYByXByPI'
build/default/production/misc.o(.text+0x42): In function `.L3':
: undefined reference to `__Q15atanYByXByPI'
build/default/production/main.o(.text+0x14): In function `_main':
: undefined reference to `_FIRStructInit'
build/default/production/main.o(.text+0x18): In function `_main':
: undefined reference to `_FIRDelayInit'
build/default/production/main.o(.text+0x50): In function `.L3':
: undefined reference to `_FIR'

And I can't figure out why?.

I have though been able to do so following the examples from the various ones here:

Fun with DSP

Investigation into running DSP code on a dsPIC chip. The dsPIC33FJ128GP802 can do a surprising large amount for a chip that costs a dollar. I implement a FIR filter and an FFT. Looking into optimizing speed and efficiency. Frequency shifting and frequency inversion are done. Finally a neural...

jontio.zapto.org

By installing his specific IDE etc. which is called Jade, you can download it at the bottom of this page, and it took me hours to actually locate the link at the bottom of the page:

SD card for JPIC

SD card investigation and getting SD cards to work with the JPIC.

jontio.zapto.org

Notice this uses the same XC16 compiler, yet it works, and the Jade file also contains his examples.

 

[rjenkinsgb]

This is the compiler manual - see chapter 16 for embedding assembly instructions:

https://ww1.microchip.com/downloads/en/DeviceDoc/50002071K.pdf