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Hi,
I have been programming a PIC 16f877a, using PICC compiler to write the code. When I compile the code I get a warning: "missing newline". When I program the chip it doesnt behave anyway like it should. Could the warning be effecting this?
The warning appears on the very last line (aftre...
Hi,
I am using PICC compiler for a PIC. I am getting a "unreachable code" warning when I try to return a value given a certain condition in a switch statement.I have included the code below. is this a serious warning? Thanks for the help.
int get_value_1(void)
{
unsigned char temp =...
Hi,
I need to drive a 12V motor that will have a heavy load which means it will suck an awful lot of current- The TC4424 is a low current mosfet h-bridge. Is there another package or alternative chip that would do the job?
Thanks
sample LCD code for PIC
Hi,
I'm using HITECH PICC V.3 compiler to program a PIC16f877a. I wish to interface with a standard 16X2 Hitachi LCD.
Anyway, I plan to use a sample program that was supplied with the software. The following code is a routine used to write a byte to the LCD in 4-bit...
Hi,
I am using a PIC for a project that Im working on at the moment. I need to program it (in C) to wait until PORTD changes, ie. when any bit in portD toggles.
Maybe an interrupt?
Thanks for the help
peak detector circuit -patent
Hi,
(sorry to repost, forgot the attachment)
An important part of a current project of mine is a peak detector circuit which takes a base audio signal from say a microphone (~50mV), amplifies it and squares it. I have attached the schematic of this circuit.
(The...
Hi,
I wrote some code for the 16f877a and simulated the program with pic simulator ide which seemed to yield successful results. However when I programmed the chip with a datman 48uxp universal programmer and tested it I got no response at all. the chip was completely dead! I tried again with a...
Hey,
I need to find an appropriate H-bridge IC to control two 12V DC motors from the o/p pins on a microcontroller. I have not dealt with h-bridges before so I am not sure which device I should choose. preferably a dual device.
Any help would be great!
Re: Can a 16f877a do this?
Hi,
I tried the code with the chip and hooked it up. This time however unlike the simulator, I got no output at all. If anyone can see any problem with the code I would be delighted to hear it.
Who was it who said "if the experiment works, then something went wrong"?!
Re: Can a 16f877a do this?
originally I was getting the simulation output of RB2 to be high no matter what the input frequency. Now I am getting RB0 to be high no matter what. BTW should the 64us not be 1us for the timer period? (timer freq = 1MHZ).
anyway I am using PIC simulator IDE and...
Re: Can a 16f877a do this?
Jon,
You are spot on with your assumptions. I really see no reason why the program shouldn't simulate properly and its being frustrating me for too long. the program is to sample the frequency of a guitar string and to set one pin if its too high and another if its...
Re: Can a 16f877a do this?
well, I used 0xFF because when this is multiplied by the overflow accumulator the result will be the actual amount of times the timer cycled. 0xFF being the maximum value the 8-bit timer can increment to before overflowing.
I would be more than happy to post/email the...
Re: Can a 16f877a do this?
Hey,
I checked out the CCP module which supports what I want to do but theres something which doesnt let me use it:
there will be 6 different input signals in portB that I need to sample one after another but there are only two compare/capture pins on the PIC (CCP1...
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