Matrix user forums

Hi Ben,

No, not yet, although that is the obvious thing to do - I will try it and see.
The thing that got me was that 3 out of 4 pins seem to work, regardless of the config file seemingly being wrong for all of them....

Cheers,
Martin.

I'm updating an old project written on FC5 and I needed to add a 2nd serial port to receive data from an RF device on UART2. I'm already using UART1 with no issues. Although I can transmit data out of TX2, I cannot receive anything on RX2 - the receive line seems to be held permanently high. So, I h...

I've had time to have another look at this, so I wrote my own bit of config code which I call after the FC CAN init macro. The speed is now correct at 500kbps using 16MHz clock (although the first time it was half speed and I had to change the CANCKS bit, so maybe this device does have that issue af...

Yep, that appears to have done the trick - thanks.

I know it's an old product now, but I'm working on updates to a project that was originally developed on FC5 and I decided to stick with it rather than move it to FC7. Anyway, using a PIC 18F66K80, I'm not able to select RA5 as an input (connecting to a switch) as it is missing from the select list....

Hi Ben, To be honest, no, I don't think it would be beneficial to me - I don't need the faster sample time or anything like that. I was just curious as to whether it should be selectable. Having looked at the help page it does say it will be the maximum the device supports, but I hadn't read that be...

When using the UART RX interrupt I see the following message during compilation: In function '_U1RXInterrupt': coff-cc1.exe: warning: _U1RXInterrupt PSV model not specified for '_U1RXInterrupt'; assuming 'auto_psv' this may affect latency Not sure if this is significant or not as the interrupt works...

One thing I've noticed is that, although the ADC supports 10 or 12 bit conversion, the bit depth is fixed at 12 in the Properties selector.

Hi J,
Yes I had seen that but, according to the errata sheet, this device doesn't have that issue.

At least two other ADC channels are also working, so that looks good - thanks Ben.

Thanks Ben, first impressions are good, it certainly works with the test code.
I'll try it out on my actual project as soon as I can.

Regards,
Martin.

I'm still struggling with the CAN bus speed. You'll have to bear with me here on what seems like a complicated test, but I have to use the hardware project I've got - I've cut out the extraneous stuff as much as possible. I have an RF transceiver chip that reads a keyfob and sends the received key i...

Hi Leigh,

Have you any thoughts on why I can't get the ADC to work directly in Flowcode?
Ultimately I need to have quite a few ADC channels working and I'd much rather not have to code it in C.

So I finally got around to looking a bit deeper into my ADC issue. I couldn't seem to get anywhere playing with timings etc within Flowcode, so I cobbled together some C code in MPLAB and I was able to flash a LED at a variable rate set by a pot - at least I know the hardware works. I've imported th...

OK Leigh, thanks.
I've tried some different timings but didn't make any difference - I'll have to look into it more closely, that will probably be in a few days.

What was the bug that the newest FCD fixed?

Thanks Leigh & Ben - yes, that seems to have fixed the port E initialisation. Can you offer any suggestions regarding my ADC read seemingly always returning 0 as per my opening post? I've tried a couple of different channels (namely, AN2,3 & 8 as I can easily attach a pot to those on the board) and ...

Hi Ben, I now get the following error: C:\Program Files (x86)\Flowcode 7\CAL\/PIC16BIT\PIC16BIT_CAL_CAN.c:43:3: error: #error "Internal CAN not supported on this device" I think you might have started with an old version as per this thread? https://www.matrixtsl.com/mmforums/viewtopic.php?f=64&t=19490

I've been doing a bit more investigation on the incorrect B8 output. It seems it's not the output to port B8 but reading from E13, this always presents a low state until I do an ADC read, then it works correctly. The attached program works fine in sim - operating the input switch E13 selects the out...

Hi QMESAR and thanks for your input. I agree oscillator config would be the first candidate and that was the reason I included a timed heartbeat. My heartbeat pulse scopes at the expected 10ms which implies to me that the clock speed is correct. Are you sure you have to manually code the oscillator ...

Having configured the CAN interface at 500kbs on the dsPIC33EP512GM710, I'm finding that the actual transmission speed is more like 400kbs and I'm not sure why. This is part of the same project as referred to in this thread https://www.matrixtsl.com/mmforums/viewtopic.php?f=69&t=19842 regarding the ...

Hi, I've been working on a project using the dsPIC33EP512GM710. All has been going reasonably well until I try to use some ADC inputs. When reading from AN2 or AN3 (the only ones I'm currently using) I always seem to get 0. I've stripped down my program to a simple test that reads AN3 and outputs th...

Ah, I didn't know that - thanks.

Hi Ben,
Those 2 issues look fine now - thanks.

Can you take a look at the config of the PWM channels please?
There should be 12, but only 8 seem to be defined, and none of the output pins match.

Regards,
Martin.

I had a look in the config file and I see:

<pin name='AN38 / RD14' port='3' bit='10' adc='38' />
<pin name='AN39 / RD15' port='3' bit='11' adc='39' />

which probably explains the mis-configuration of those pins.

However, I could not find any configuration pertaining to the ECAN.

Hi, I've just started with the dsPIC33EP512GM710 on FC7 (I'm new to both having only used 8 bit devices on FC5 previously). I think I've found a couple of device configuration issues: 1) When configuring I/O to ports RD14 & RD15 using the graphic selector, these actually map to RD10 (RD_H2) & RD11 (...