Search found 14 matches

For some reason on the PIC18F458, when I set PORT B to output and output 0xFF onto LEDs they all light up except B5,B6,and B7. However all of the pins on PORT B work fine as input.

I think I just ...

Would I be able to use the comparator built into the 18f458? I've never used the comparator before so I'm not sure how it works...

Yeah, I tried implementing the frequency counter by sampling the signal with the PIC 18F458 and then counting the peaks, but the processor does not have enough RAM to do this robustly. I like the ide ...

Hi, this code is supposed to output a 16 bit number on LEDs. The problem is that when I simulate it, it works as it should. But when I program it onto the chip, it doesn't work. I think it is an er ...

What do you do with these? Do you leave them, hook up a resistor to ground, or just straight ground them?

Hi, what do you use for drawing circuit schematics? I'm using Pspice right now but it does not have any of the PIC symbols... What do you use?

Well I have already wrote the software, I just need an amplifier for the input signal....

Hi, I have a circuit using the 18f458 where I have a microphone going to an amplifer , going to the A/D of the PIC. The microphone generates a signal of amplitude 50mV (roughly). Could you recommend ...

Hi I wrote a program for the 18f458 and when I compile it, the CCS compiler says that all of the ROM is used up, but when I look at the memory map in MPLAB, it still looks like there is plenty of prog ...

Actually don't worry about it, I'm an idiot. One of the braces was the wrong way ;P. I just spent hours trying to figure that one out. What a good waste of time

I have done alot of testing and actually think it is a bug within CCS. How could I get around this?

When I take out the for loop in the get_freq routine it compiles fine. What is wrong?

Hi, I have a program to determine the frequency of an incoming analog signal. The main program builds and runs fine, but when I insert the simple subroutine "get_freq", I get all these errors popping ...

Hi, I am working on a project (with the 18F458) where I need to sample an incoming signal. I do not fully understand how the A/D implementaion works. Do I have to use the A/D ISR? I made a test pro ...