SEROUT Just Garbage!

[mister_e]

No problem.

[flotulopex]

geckogrotto,

I'm actually trying to understand a little bit more about serial communication and making some tests on my side too.

I had to use a level converter (MAX232) to make the communication work.

Looking at some posts, I have understand you connected your PIC directly to the PC's serial port (= without converter)?

I must be wrong, no?

[geckogrotto]

geckogrotto,

I'm actually trying to understand a little bit more about serial communication and making some tests on my side too.

I had to use a level converter (MAX232) to make the communication work.

Looking at some posts, I have understand you connected your PIC directly to the PC's serial port (= without converter)?

I must be wrong, no?

Nope not wrong. I have pic output GPIO.0 connected to a 1K resistor then to serial pin 2 and GPIO.1 directly to serial pin 3. Serial pin 5 to ground.
Also have a 0.1uF from pin 1 to 8 of the PIC + and ground. Thats it using the last bit of code Mister_e posted and its working fine.

I should already be in bed now, I'm crashing now but if I can help I will tomorrow.

[flotulopex]

Ah!? (which means I'm very surprised!!!)

I thought it was mandatory to use a level converter to transmit data from a PIC to a PC and vice-versa.

I will try to connect my 12F675 as you did.

In fact, my first try was with a 16F88 having an AUSART module and it didn't worked whithout the level converter (but I didn't use a resistor neither - I'll have to try this too). Data where transferred but it was unreadable - fuzzy characters and RX counter on PC never stopped. Is this (module) making a difference?

Get "regenerated" first...

Thanks

[geckogrotto]

Ah!? (which means I'm very surprised!!!)

I thought it was mandatory to use a level converter to transmit data from a PIC to a PC and vice-versa.

I will try to connect my 12F675 as you did.

In fact, my first try was with a 16F88 having an AUSART module and it didn't worked whithout the level converter (but I didn't use a resistor neither - I'll have to try this too). Data where transferred but it was unreadable - fuzzy characters and RX counter on PC never stopped. Is this (module) making a difference?

Get "regenerated" first...

Thanks

Let me know how it goes. I was getting weird chars at first but turned out my OSCAL was messed up. I believe you have to have
DEFINE OSCCAL_1K 1
ANSEL = 0 'disable ADCs
CMCON = 7 'disable comparator
in there for sure too.

[flotulopex]

OSCCAL is not valid for 16F88.

Even with ANSEL and CMCON set, I still get strange characters on the terminal's screen.

When I connect to my level converter, no problem.

I'm goint to try with my 12F675...

[Charles Linquis]

Since the level converter provides inversion, and it works with the level converter, it follows that if you are not using a level converter, you need to send the data inverted.