Matrix user forums

Hi I'm trying to produce a variable frequency PWM on a dsPIC development board. It works all right if the duty and period are variables in the range 0-255, but if the period is a variable in the range 0-65535 then it appears to automatically reset in the 0-255 range. If The period is set to a fixed ...

Hi Leigh My program has been running and logging to the SD card for just over 24hrs (over 200K data points) I've stopped it and looked at the data and it appears to be writing to the SD card alright. There are the occasional odd or missing figures, but I think this is to do with mis-read data on the...

Hi Leigh

I'm running Professional Version V5.5.2.1.

Regards Dave

Okay Leigh

Thanks
Dave

Hi Can you confirm what the maximum output current is on a single transistor output? On the specification sheet table it is quoted as +/-500mA each channel with a total of +/-1.75A for all channels Under 'Maximum rating' it says Transistor Outputs (A,B,C,D) +-1.75A, which I would interpret as 1.75A ...

Hi I connected inthe new MIAC today (V2) and downloaded my latest program (with the build set for a 32K system). It still told me that the FAT16 component and LED (0) were not connected when the program complied. The program appeared to log to the SD card on the serial expansion unit, but non of the...

Hi Leigh I've modified the FCD file and re-started flowcode and then changed the build to the MIAC 32K System. I've tried compiling the code and I get a messages at the start telling me that "One of the pins of the component FAT16(0) are not connected to the microcontroller" or "One o...

Hi Leigh Thanks for the reply. I think I will probably buy a new MIAC for this project then. Are all the new MIACs V2s, as the website still has the MIAC down as having the 18F4455 chip, or it the V2 a special order? The data on the website also says the MIAC has 12K of ROM when the compler report f...

Hi I don't know much about C code, but looking throughthe complied C code there looks like there are lots of macros associated with functions for the MIAC unit and the add-on modules which I'm not using. Such as void FCD_MIAC0_RelayON(char RelayID) and the code immediately below it, and FCD_MIAC(0)_...

Hi Is there any way of increasing the ROM size in the MIAC. I'm using it with an advanced module and serial module and programming it in Flowcode 5. I think that because I'm using it with the add-on modules it uses up a lot of code space and the program so far uses 23332 bytes of ROM. Can the MIAC b...

Hi Leigh I've got it to work and it works on both the Advanced and Serial Modules. I've had to increase the timeout to 500 as sometimes it misses the beginning of the string. It always puts a y (ASCII 152) in front of the string. Generally just one but sometimes two or more. If it puts in more than ...

Hi Leigh - Thanks for the reply I'm trying to understand what the example does. Basically does it check if the character of the serial data is CR or timeout inwhich case it jumps out of the loop. If not then it goes round the loop reading the next chracter each time. Does it store the character in a...

Hi Leigh I've tried putting a 500ms delay in at the start and it still does not work. I've set the timeout to 250 and it still does not work. I'm trying to figure out how to do the ReceiveSR232Char. The help and the example on the net are not very clear. Do I need to read each character individualy ...

Thanks John

Attached are the zipped up log files

Regards Dave

I don't appear to be able to attach the .CSV files

Hi I am wanting to read the serial data put out from several sensors. The data is in the form of a 34 byte message ( H xxxxx T xxxxx Z xxxxx z xxxxx\r\n). I can read the data thyrough the Serial Module but not on the Advanced Module. on the advanced Module it only reads the first 6 bytes, and it doe...

Okay Leigh

Thanks
Dave

Hi

I've been using the MIAC advanced and Serial modules with a 5V input.
I've now using a sensor with a 3.3v idle high output feeding into the serial modules but the modules don't appear to be able to read anything.
Is the voltage too low?
Do I need to raise the signal voltage to 5v?

Regards Dave

Hi

Are there any plans to implement flowcode CAN macros to support 29bit identifiers, particularly when using the PIC18F2585/2680/4585/4690 chips with in built CAN functionality?

Regards Dave

Hi Benj I have now got it working with the standard compiler. I was cycling home last night thinking about it and then realised that the byte values that were being used may be in the wrong format (decimal and not hex). I have now put 0x in front of the values and it works. To check it I've tried di...

Hi Benj I modified my flowcode so that it convets the float value to a string and then prints the hex values and the float string on the MIAC screen. This works okay except the float value is 0.000000 as you are getting. I've downloaded and installed HITECH C Complier for PIC18MCUs (pro)v9.80 window...

Hi Benj Thanks for pointing out the typo. I too can now get it to compile and get the same answer of '0' As I don't understand the C code I can't comment on what's in the link. The data sheet for the sensor I'm using just states:- Floats are coded based on IEEE754 Bytes order should be reverted to &...

Hi Thanks for your assistance Dazz I'm still having problems. I put the code in as Dazz has indicated and created a short flowcode program just to prove out the code, but it won't compile. The error message is:- Hex to Float conversion.c(300): error: unexpected identifier Hex to Float conversion.c(3...

Hi Please bear with me as I never done this before. I put the first section of code near the start of the main C code. (Build, then View C) At the start of the code there are a lot of #define MX lines. I put the first lot of code somewhere here? For the second lot of code I pull in a 'C' icon box, o...

Hi I am reading in a string of serial information from a sensor via the RS232 link (24 bytes). The information is in hex with packets of data in bytes of 4 (eg 42 47 71 05), and are in the IEEE754 format. I want to convert this to a floating point number. There is a StringToFloat function in Flowcod...