XC8 RS232 Eusart Configuration

[intel]

7 Bits Odd 2 Stop Bits on 18F45K22 with XC8 I need to communicate with RS232. MCC does not support it. I couldn't find a sample code in my searches. Do you have a library or code? Thanks.

[TucoRamirez]

something like this?

https://github.com/etiq/OpenLab-PIC18F4550-EUSART-examples

[intel]

Thanks for your interest TucoRamirez. But these codes are only supported with Hardware.

Your code:

Code:

unsigned char config_1 = USART_TX_INT_OFF & USART_RX_INT_OFF & USART_ASYNCH_MODE & USART_EIGHT_BIT & USART_CONT_RX & USART_BRGH_LOW;

I can't do anything with hardware support. As an example (requirement for me):

1 Start Bit
7 Data Bit
Odd Parity
2 Stop Bit

This CCS C is also very easy. But so far, I've prepared the code with XC8. The different configuration was a surprise for me.

For CCS C:
#users232(baud = 9600, parity = O, xmit = PIN_C6, rcv = PIN_C7, bits = 7, stream = PORT1)

I couldn't do that with the XC8. I'm hoping it could be with an XC8 Uart library.

[TucoRamirez]

i wonder if the CCS implementation is a software one...  

so do you need a soft lib?

you can do 7N2 using 8N1 by shifting and putting manually a stop bit on your send char function

[Wilksey]

set the UART to 8 bits and set the most significant bit when sending, this becomes the stop bit and the real stop bit acts as a second one, giving seven data bits and two stop bits