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I have got a pwm output for which I generate the duty value randomly using rand(). I currently set the rand_max value like this in my header file:

#define RAND_MAX 1023
#include <stdlib.h> ...

Hi,

I'm just about to start work using a 96*40 dot BATRON display and came across this post. Did anyone finish getting the driver software written for this? Just wondering so I don't spend too much ...

TTelmah - thanks and here's some clarification. The data array is declared:

BYTE data[36];
and the csCheck array is declared:

BYTE csCheck(4);

We've checked with the people who wrote the sof ...

Ok maybe some confusion.... the statement "exclusively OR the 1st, 4th, 8th, 12th '" should have read "exclusively OR the 0th, 4th, 8th, 12th '".

And I've looked over my code ag ...

We are receiving data via rs232 and we know the data is for the most part good. A 4byte checksum is sent after the data we use and I am trying to write a routine to check the validity of the data sent ...

Sorry I meant to show what the important values were!

byte can_mode = 0x01;
byte can_tx_buffers = 0xFC;

Ok I've got this sorted now so I'm posting the solution for anyone who may ever need it.

By default the PIC 18F4680 has only 3 TX buffers set up. It has 6 programmable buffers which can be configu ...

I have used the CCS example to write a bit of software which needs to send out data using CAN. Essentially I need to send 5 packets of 8 bytes but at the moment the receive side is only seeing the fir ...

Hi all - thank you for all the amazing help! It's taken me a while to reply because after having implemented some of your suggestions we were still seeing numbers that seemed entirely wrong. To cut a ...

Thanks for that explanation it has really helped me - I have modified my software now and will post the full code below. One problem is that startPos does not see to be the right number and I can't se ...

Thanks very much John, that certainly helps clarify things but I still have a couple of questions...... I am looking at the example you suggested and am currently running the following code.

#def ...

Sorry - where it says 'position 643' above, it should read 'position 63'.

Ok I firstly am now running my 18F452 at 39.3216 MHz by using a 9.830400 MHz oscillator and internal 4xPLL. At least I hope I have ! Here are my fuse settings:

#FUSES H4 //H ...

Wow thank you so much - that all makes great sense. I probably won't be able to post again until Tuesday unfortunately but many thanks for all the time you have put into this. I'll post questions and ...

Thanks foppie, I will give that a go. Ttelmah the wiring is absolutely fine and has been fully tested. It's definitely a speed and/or software problem.