Serial Baudrate 115200

[kblim]

I know the hserout instruction is for the hardware USART, but how about the SerIn2 and Serout2 command.

Do you guys use Serin2 and Serout2 command instead of hserout?

What is the main difference between Serin2/Serout2 and hserout?

How to set the 115200 baud rate for serin2/serout2 bcoz previously i was using these command to connect to a gsm module with 19200 baud rate?

Thanks

[picnaut]

Hi kblim,

As far as I know, you can't use baud rates higher than 38400 baud (I think) with the ser-type commands.
I'm sure you can't do 115200.
This is because the ser-type commands use a "bit-banging" approach as opposed to the hser-type commands which use the built-in usart and generate less code.

This was the first time that I heard that you can communicate at 115200 using debug though.
What are the pros and cons of that anyhow, Bruce?

Regards.

[Bruce]

The serin, serout type commands were originally designed to offer BASIC Stamp users similar commands. They all produce huge code when used because the command libraries have to cover so many various options to maintain Stamp compatibility.

Debug/Debugin produce much smaller code, and offer the higher data-rates because the library routines are much smaller.

Serin, serout commands can be used on any I/O-pins that support digital I/O. Data-rates & pins used can be changed on the fly. Debug/Debugin pins & data-rates are fixed with the DEFINE used to set them up, but offer much higher data-rates since the library routines are much smaller.

If you need higher baud rates with slower osc speeds, then use Debug and Debugin if you can live with fixed rates & pins you can use.

Of course you can use them all if needed, but I'll normally opt for the hardware USART or Debug/Debugin.

[kblim]

Hi all,
Just wonder how to define the debug to communicate with the open mode when receiving serial data from other device. Using the open mode because need to share the data line with few PICs.
It is possible to do Open mode for DebugIn, Non Open Mode for Debug?

Kindly share your expectise.

Thanks alot.

Regards

[Melanie]

There is one other possible unconventional solution... Set SERIN2/SEROUT2 to run at 11500 baud at 4MHz and then switch to 40MHz Oscillator (approipriate 18F PIC Series) WITHOUT telling PICBasic you've done so... everything works at x10 speed... so PAUSE 1000 will only give you 100mS instead of a Second. In theory it should work (I'd use 67 rather than 66 as the calculated Speed figure)...

[kblim]

Hi all,
I was previously using the SerOut2 to send data, but the data line was sharing by few PICs and I have used Open Mode.
Recently porting my code by replacing SerOut2 with the Debug command to save same space. But later found out that there are no way to setup the Debug in the open mode.
Please help! Is there neccessary to use Open mode to share the data? or the Debug doesn't need the Open mode even sharing the data line.

Regards

[dhouston]

I have an application where a PIC12F683 has to communicate with an external peripheral. I need SerIn/SerOut because the external device may be 4800 or 9600 bps.

The PIC12F683 also needs to communicate with a PIC16F876A.

Is there any advantage to using Debug/DebugIn for the PIC2PIC comms given that the PIC12F683 already uses SerIn/SerOut?