Matrix user forums

Yes - I'll provide some example C code for RS232 comms.

You will need some kind of add-on hardware to do this. For example, we produce an RS232 E-Block (connects to the COM port of a PC) and a USB232 E-Block (connects to a USB port). You will also need to write an application on the PC that communicates via RS232. These E-Blocks are compatible with the v...

Hello Pascal,

Please send the FCF, C, ASM and ERR files to our tech support address (support@.....co.uk) and we'll have a look.

We connect to it using the 4bit interface. The LCD driver chip used is the KS0066U. Looking at its datasheet (do a web search) might give you some more clues, although I think we have replicated most of the important info inour own datasheets. Here's the basic procedure to send info to the LCD: Put ...

This error may be ok to ignore - it means that the configuration word could not be set exactly to the value specified. This can happen because some chips have config bits that are always zero (for example). Another reason for this happening is when you are trying to disable LVP cabability without ha...

Nope, the XM10U basically translates the modulation sent along the power line into TTL level signals that can then be interpreted/generated by a micro. It also provides some basic error checking (e.g. waiting for the repeated second message to appear before relaying it to the micro). There is a simi...

I suggest you use a variable, STATE, to define which state the outputs should be (i.e. should RB0 be on or should RB1 be on). You could then react to changes in the input and set this state appropriately. If you want to be neater, your STATE variable could flip between 1 and 2 as these values (when ...

If I remember correctly, the XM10U communicates using TTL-level logic (5V), so you will not need a max232. Although I would suggest using some kind of protection. As for the comms itself (and indeed for the interfacing circuitry), there are a few references on the web. We have a "strategy guide" doc...

We did develop a prototype of a simple toggle-switch E-Block, but didn't actually manufacture it because we were not sure if the demand was there. If there was enough demand, we could actually produce a small quantity of toggle-switch E-Blocks. But I guess the cost to manufacture a small quantity wo...

The screw terminals on the v2 board are located at either side of the board, just above the sensor sockets - portA to the left and portB to the right. If you are using an '876 I would suggest using portC via the 40-way expansion header. This header is next to the DIL socket for 40-pin PICmicros. It'...

I presume you are asking about the 2 white "BT" sockets. I wouldn't recomment using them for anything other than the range of sensors we supply. The pin-outs are shown in the circuit diagram for the board (probably on the ELSAM CD) if you're really interested. I would suggest you used the screw term...

The adcon1 register is in bank 1, so you need to set its value when the RP0 bit of the status register is set, ie: #include <system.h> main() { set_bit(STATUS, RP0); //SELECTS BANK 1 TRISB=0x00; //MAKES PORTB OUTPUT TRISA=0xff; //MAKES PORTA INPUT adcon1=0x07; //Set all A/D i/o lines to digital clea...

We have created an X-10 E-Block (EB-028) which provides the electronic interface between a microcontroller and a TTL-level X-10 transceiver (eg, the XM10U, XM10E and TW523). In addition to this, we offer code examples and suggestions to help you write code for this E-Block (in C and ASM). We may als...

V3 is close, but decided to add a few extra bits (which have taken longer than I anticipated). I've done that now, and we are currently doing some internal BETA testing. But today is my last day of work for a week and a half (for a much needed holiday), so we will not release a public BETA for a few...

In v2 of FlowCode, you can use a "#defines" component with code similar to the following to define a lookup table: const char table[] = {10, 20, 30, 40, 50, 60, 70, 80}; Assuming you have 2 variables IDX and VAL in FlowCode, you would access this table using a 'C' icon with the following code: FCV_V...

32-bit maths is going to be tricky on an 8-bit micro and take up a fair bit of space within the program memory, so I would suggest a different route - use of a lookup table. 50 32-bit words can be stored in 50*4 = 200 8-bit bytes, which can be pre-calculated on a PC using a spreadsheet. Your values ...

It has not been 100% finalised, but I believe that all FlowCode components will be available in the professional version of FlowCode v3. So you will have access to RS232, EEPROM, LCD, A/D, SPI, I2C, CAN, LIN, PWM, TCP/IP, etc. And no, you do not need to be using E-Blocks to use these components. How...

Use the TIMER0 interrupt with a suitable crystal clock frequency and prescaler. Update the timer info in the TIMER0 macro, and repeatedly display the time within your main routine.

Also note that 18F PICmicros have a 31-level stack, which is much more generous. FlowCode v3 will work with 18F targets.

There is a limit because the 16F PICmicros have an internal stack limited to 8 addresses. This means that you can only have 8 nested macro calls (assuming interrupts are not used). This is plenty for the majority of apps. Incidentally, the new v3 of FlowCode uses a different underlying compiler whic...

Great news, Brian. Thanks for posting the workaround.

I think it won't be possible - the filename is always appended to the end of the command line given in the "compiler options" entry (it is like this because it was originally intended for use with our PPP programmer only). You may be able to find a way around it by using an intermediate batch file t...

My suggestion would be to use the timer interrupt. Maintain and update your count as you are doing in your main flowchart, but display the digits within the interrupt timer. Use quite a fast interrupt frequency (around 100Hz should be ok), and use a variable "SHOW_TENS" to track which digit you are ...