Search found 39 matches

Hi all,

Does any1 would know how to do read a 16-bits register (TMR1H:TMR1L per example) without using the built-in make16 function?

I built one using pointers and it works, but it access the re ...

Hi,

I got it to work by adding delays between each i2c commands. Seems that the slave's ISR wasn't fast enough finaly.

Thanks to all...

Since the code is a little bit complicated, I choosed to explain it in words instead... But since you ask for it Wink

Note that I use my own functions, not the CCS' functions.

Master code : ...

Hi,

If this is the problem then investigate using high priority interrupts and assembler with a RETFIE 1

I tried the fast interrupts to be sure, because it's possible that the lenghty ISR I use ...

Hi,

I'm working on a pic to pic i2c communication link.

Master : PIC18F452 (running at 40MHz)
Slave : PIC18F452 (running at 10MHz)

The master executes a comm. routine which sends many bytes ...

I think that it solved my issue...

THANKS A LOT! Very Happy

Hi,

I'm banging my head into the wall these days... Mad

First problem, I have a PIC18f452 operating in PLL mode with a 10MHz xtal. I use the delay_ms() functions to flash a led. Sometimes it op ...

Hi,

I read this section in the PIC18fxx2 datasheet (doc 39564b.pdf) and I don't really understand the logic of it :

Note: In the MSSP module, the RCEN bit must
be set after the ACK sequence or ...

If it is a static , so it won't change will it?

Actually, declaring a variable as static means that it'll keep its value from one call of the function to the next. On the other hand, if it isn't ...

Hi,

You should always use a resistor to limit the LED current. Omitting this resistor can lead the destruction of the pin and/or the LED.

Most of the time 220 ohms is a good resistor value, but ...

I found that when these problems arise, looking at the assembly code listing is of great help. You can take a look at the code generated by the compiler to configure the RS232 module to see if the bau ...

The best way I know to save RAM is to use effeciently the different data types. Meaning that you should ask yourself what is the range needed for a given variable and choose the appropriate data type ...

I must admit that this looks like a compiler bug. Anyway I'll make sure by replacing this routine by my own (which, of course, cannot be wrong... Rolling Eyes

...). I hope that, as Trampas pointed, I can a ...

Actually I use v.3.187... Hope this isn't a compiler bug Shocked

From the ASM listing and the ICD2 debugger I can see that the problem is this SSPIF that never gets set...

But does this result ...

Sorry about the ASM listing, I just posted this snippet because this is the code for the i2c_write() function. Since this is a built-in function, I cannot access the C code (not even sure there IS C c ...