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Hi PCM

I followed your instructions and the compiler complained about the device not being recognised, so I reinstalled the compiler as you suggested. It then compiled fine.

I also needed to run ...

Thanks for replies,

Have changed the filename and simplified code as requested:

Output:

Executing: "C:\Program Files (x86)\PICC\Ccsc.exe" +FH "ETVelocityMode.c" #__DEBUG=1 ...

I have a new PC and since trying to compile existing projects I get output errors with undefined identifiers in ref only to QEI Functions. For example:

Executing: "C:\Program Files (x86)\PICC\ ...

Update:

Thanks to GpsMikey: I changed out the xt for a 19.2MHz and the problem is solved. Tested on 3 PCB's and 3 PC's all good!!! I think I owe you a beer!

Ttelmah, I appreciate your sugestion ...

Hi Ttelmah

Yes CPU is running at 20MHZ, I appreciate your comments, however the time taken to process the ATOL is not an issue in this particular application as the PC is waiting to hear from the P ...

HI

Yes Hardware UART being used (Pins C6 and C7). I am using a MAX 3232 chip to interface.

Receive routines are based around calling GetC and GetS functions:

c=getc(); //Get C ...

Hello all

Thanks for continued support. I got pretty excited about the DTR enable parameter but unfortunately it didn't help. So I have written a couple of bits of software to try to break the prob ...

Thanks for the replies guys....

What you are saying makes sense, and having tested it on another win7 machine I found it doesn't work on that one. The VB app has hardware flow turned off, but god k ...

Appreciate the forum is not for VB.net support but someone may be able to throw some light on this issue.

I have a PIC18f4431 programmed using ccs to receive a series of parameters over rs232. It l ...

How ironic that the mistake in the schematic should lead me to the actual fault. The incorrect connection to +5V got me thinking, what if Vout was grounded?? No it couldn't be .... right??........ Wro ...

PCM you spotted it before I could update the picture, that was an error in the schematic only. Hardware was OK. I have changed the link to a correct version schematic. Showing V ref to +5V

Well spo ...

HI Asmboy, just to confirm:

CS signal and clock showing cs high to low before and low to high after clocking 2 x 8 bit cycles

http://s20.postimg.org/b1q5n5tcd/CS_Clock_SPI.jpg

Cheers Andy

Here's the picture / Circuit...

Circuit: http://s20.postimg.org/q9aql9akt/Circuit.jpg

Scope of bits 15-8 showing command bits 0x30 (0011 0000)http://s20.postimg.org/k6tx3a7d9/20130509_163939_Sma ...

Looking in more detail now and still finding nothing wrong. What is going on??

So I have hooked up a dig scope and checked signals. CS is being pulled low before and after spi write- so happy on th ...

Hi

Thanks for the reply, Yes I spotted the mistake on the if statement just after posting.

Now changed to if (INC>=4095) - So now I ensure that I dont corrupt my command instruction - but s ...