Matrix user forums

Yes - the problem is in FC...

The actual value is 32 bit (on hardware) which is correct - it's just the mismatch of using Z for 16 bit values in variables and 32bit values in properties..

Martin

bits.jpg How many bits does 'test' have Z implies 16.... Another visual glitch - component groups lose their description if the window is resized using the maximize/minimize button - though they recover if resizing by dragging the window. How many is lost depends on how small the window goes... com...

Okay - a small program. This watches UART2 (here a software channel - receive on D2, Tx on D3) - looking for numbers sent as a string (using SendNumber - or in my case putty and a FTDI converter...) A number of up to 10 digits is converted to a 32 bit unsigned int (so max is 2^32-1) and the string a...

Hi Jorgen,

Send number converts the number to an ASCII string and sends that - you could receive that and convert back. Alternatively spilt into bytes and send and recombine..

I can do a simple example if it would help..

Martin

Hi Bill,
Have you installed the AVR tool chain?

See https://www.matrixtsl.com/flowcode/download/

Martin

Tested on hardware (Arduino mega) - result was 32 bit.

Martin

A minor visual bug...

Add an signed or unsigned int property to panel - this is shown as Z or Z+ - however the property is actually 32 bit. So should be shown as L or L+. I had to test whether the variable was 32 bit (which I needed) or 16bit....

Martin

Thanks for the feedback. I'll add the remap pins and try battery power. The folder structure is already supported - folders can either be names 01..nn (and I've seen this documented as either 10 folders or (more likely) 100 (so 00..99)) There is a PlayMP3Folder that plays tracks from a folder called...

Thanks to both, I'll try the 10k resistors.. the 1k in the tx doesn't make much difference.
The sound from dac_l and r is actually pretty good....

Martin

Sadly it didn't work like that - nasty 'tractor' noise in the background :| , back to dac_l and dac_r. Everything going wrong this evening - now it will only play track 1 and none of the queries return anything. Except I hadn't changed anything - just tweaked the test program to try different things...

Thanks - will give it a go....

Martin

Tried playing via the DAC - through a mono amplifier. I'm a bit confused as to wiring DAC_L/R to amp with gnd to ground just gave a nasty buzz.. Connecting L and R to + gnd on the (mono) amp worked ok with pretty good sound. However playing a stereo track only played one channel - how should this be...

Thanks Martin, I'm keen to check it works with other MCUs as well as Arduino. Also ideas on the interface - it has quite a lot of macros (the Df player is very flexible!) - very easy to write - most macros are a single line of code... The one problem I found is that a small delay is needed after a p...

Another idea - use the CAL_UART component - there are Receive Array / String macros with a timeout. Just used with dfplayer and seem to work well...

Recently been trying to get one of these working. I tried using some code on the forum but it wasn't working for me :-( So I made a small component - the interface is a bit 'busy' for FC. Suggestions welcome - I' suspect naming similar routines to keep them together (PlayTrack, PlayFolder, Play....)...

Try a slower speed - 57600 is pushing it for a software UART..
Can you get it to work at 9600 baud?

Can you post your code?

Martin

It's possible but not easy. You could busy wait watching the rx pin for a change of state and then receive - we managed this for the j1850 bus (effectively receiving data at 9600,baud) but timing was tight.. Use an Arduino mega. It has multiple tx/rx and this makes life much easier for debugging pro...

Glad it's worked...

Let us know how the project goes...

Martin

I have an idea how it might be possible to link the C code with FC... I did a simple test - I created a header file test.h and a corresponding c file test.c Test.h declared a function #ifndef __TEST__ #define __TEST__ extern int addem (int a, int b); #endif and test.c defined this (not very useful) ...

Works for header only code....' For 'simple' code - you can include the headers and then add the C from the C files to the supplementary code box.. Just tried here - and, unsurprisingly, it doesn't work (the functions called aren't found by the linker) What we need is a way to add the 'c' files (so ...

Looking at the Kiel code - it would be possible to convert to FC, but it would be a lot of work.... My advice would be - do the USB code in C... (Or pay someone to do it in C?). It should be possible to handle the USB seperately - downloading updates etc (which can still be in FC...) Plan B - use ha...

https://www.keil.com/download/docs/362.asp
Not FC - but might be worth some study?

#include "filename.h"
Or
#include <filename.h> \\ searches current paths
In a c block or supplementary code.
You can then use imports in c blocks ....
Good luck!

Structures are only available in C.. So struct {int a; char b;} x; would define a structure (x) with an int and then a char (so x.a = 1 and x.b = 'c') - depends on the situation but you could use the C code in C blocks or use an array of bytes (though this can get a bit ugly...) (so in this case use...

By convention - so there is a good chance - all caps names are used for constants.. ,(for example DEVICE_FS) - these should be defined in one of the header files. Also the structure of FS_Desc etc. If this is C they will either be initialised on a function (address passed in using & or dynamically a...