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Yeah, I switched it to 2400 baud rate and turned off the handshake. Maybe the visual basic code is wrong or the code on the PIC should be "if OK = 4" instead of 4 being in quotation marks. Or am I...

OK, thanks for the response.

I tried it without the RTS / CTS lines but it still didn't work.

Sorry about the HSER defines, I used them before and I forgot to get rid of them. Even without...

Hello,

I am trying to hook up my PIC18F4550 to my serial port and send data using Visual Basic. The code for the PIC is below. I have a 22K resistor on the RX line of the PIC. The RTS and CTS...

It takes five seconds for the LED to come on.

I tried to turn it on without using the RTS and it works fine.

Just now, I tried putting a diode on the pin and it actually seems to be working...

Alright, I got it working by changing adding "DEFINE OSC 4." So it works fine now. However, when I tried the original program there is still a pause. When I turn the pin off there is no pause,...

OK, this is really weird. I made a LED blink program but it takes like 5 seconds to turn on and then it doesn't blink, it just stays on. How do I turn off the 37khz oscillator? Thanks.

-Mike

Thanks for the response.

The resistor is in series with the pin. And I'll try to test the LED program right now.

-Mike

Hello,
I am using an 18F4550 and I am trying to get it to read a digital input and turn on a LED when it is on. For some reason there is a five second pause when I trigger the pin. When I reset...

OK, thanks.

-Mike

"Which serial modes are you using"
I am using the HSERIN and HSEROUT commands. I haven't actually tested it yet because I've been working on RTS and CTS. Do I need to use SERIN and SEROUT with the...

Wow, thanks Skimask, it appears to be working. I put the 22K resistor in and it is recognizing the voltage from the serial port.

The one thing I didn't understand is

"it'll be inverted from...

"you're not using a MAX232 or at least a series resistor like the green manual says..."
Uhhh...oops. I am using a 22K resistor on the transmitter line of the serial port but not on the RTS. What...

Thanks,

I put that in but I am still having problems. I think it has something to do with the serial port. I have connected the RTS line to porta.0. When I measure the voltage with a voltmeter...

Hello,

This should be a really simple problem but I spent tons of time reading the datasheet and couldn't find a solution. I am trying to get a digital input on porta.0 and trigger a led to...

I appreciate the responses. I may have to abandon this project because of the aforementioned difficulties. However, for future projects, how would I strengthen the sensitivity of the ADCIN reading...

Uh oh, I smell a difficult project ahead if I were to try that. If I stuck with what I am doing (IR emitter and receivers) , what difficulties would I run into as far as measuring distance using...

dhouston, you said that I should send a ultrasound pulse to find distance. But how would I track the position of a specific object (one with a IR emitter, for example) without using anything too...

Thanks guys. I'll try it out and post my results.

-Mike

Hello everyone,

I am using a PIC18F4550 and I am trying to measure the strength of an IR beam (translating to distance). I am using this...

Thank you very much, Henrik! This problem has been plaguing me forever.

-Mike

Hello everyone,

Can someone tell me how to configure adcon(1)? I need to use all the analog channels on my PIC18F4550 for the adcin command. Can anyone tell me how to read the datasheet?

I...

Does anyone have a link or know of an article about this where I could go to?

-Mike

I might use the USB feature... I don't know if I need the feature right now though.

I think I will use this code...but are the adc_bits and adc_sampleus numbers arbitrary?

DEFINE OSC 4
DEFINE...

I would like to read all channels. And I am using a 20mHz crystal, although I know I need a DEFINE OSC 20 for that. What I don't understand is how to read the tables in the datasheet and how to set...

Hello everyone,

I have a simple question: I am trying to use the adcin command to get input from a pot source on a 18F4550. I am hacing problems with the defines and setting it up. I assume I...