16F88 7 data bits

[skimask]

>>Define SER_BITS 7

I think you mean DEFINE SER2_BITS 7 and this is for software Serial Out (not Hardware) so the data sheet will not help in this case. The hardware UART (on all PICs?) does not support 7N1.

Something to try: two adjacent pins connected together ... set one for output using SEROUT 8N1. Set the adjacent pin for output using SEROUT2 7N1. Make the pin not in use an input - switch back and forth as needed. You also could use the USART for the 8N1 rather than SEROUT. You might need weak pullups (or pulldowns if inverted mode) to ensure the serial line is not corrupted when you switch between pins.

Good Luck

I thought the DEFINE for SERIN/SEROUT stuck constant for the whole program...like you can't re-DEFINE it.

[paul borgmeier]

I thought the DEFINE for SERIN/SEROUT stuck constant for the whole program...like you can't re-DEFINE it.

They do - that is why I suggested using SEROUT for one and SEROUT2 for the other. They are not related by the defines

[skimask]

They do - that is why I suggested using SEROUT for one and SEROUT2 for the other. They are not related by the defines

AHA! Missed that!

[rwskinner]

In the software serial routines, MELabs must be looking at the settings in order to determine how to send the data bits and set the parity right? Problem is it's a define and not a variable or it most likely could be changed on the fly.

I sure hate to bit bang this but I may have to.

Richard

[paul borgmeier]

>>I sure hate to bit bang this but I may have to.

you do not have to, PBP has done the work for you.

>>two adjacent pins connected together

another thought - no need for adjacent pins - use SEROUT for 8N1 and SEROUT2 for 7N1 ... using the same output port pin.

If PORTA.1 = 1 then ; check jumper
SEROUT PORTB.0, .... ; need 8N1
else
SEROUT2 PORTB.0, ... ; need 7N1
ENDIF

will that work?

Also, I do not see why you keep mentioning CCS??? We are taking PBP here

[rwskinner]

I'll give it a shot this morning. It "should" work.

Why do I keep mentioning CCS? I only mentioned it once in an effort to show it is possible to do it But upon closer examination, it also only handles it in software only.

>>>>two adjacent pins connected together
another thought - no need for adjacent pins - use SEROUT for 8N1 and SEROUT2 for 7N1 ... using the same output port pin.

Also, I do not see why you keep mentioning CCS??? We are taking PBP here

[paul borgmeier]

Hi Richard,

I hope this approach works for you.

Best of the Day,