[HELP] Remapping Serial0 to Serial1 on ATXMEGA192

In that place i have not help. Someone said that it is not the right place.

Existing some configuration file (.H) where i can setting the serial port, first i build the project?

Thanks for reply.

I should study all files of the project. This is beyond my skill.

The Hardware is simple. I not use the SPI, therefore no conflict.

I already soldered two wires on two pin of the chip atxmega. Pin are number 22 and 23 (serial1). I must only remap the serialport on the Firmware, and compile it.

My simple verify of the PortC pin

#include <avr/io.h>
#include <util/delay.h>

#define BLINK_DELAY_MS 1000

int main( void )
{
  PORTC.DIRSET = 0b11111111 ; // Set pin0  to 7 to be output.
  
  while(1){ // loop forever
    PORTC.OUTSET = 0b11111111 ; // set  all output high.
    _delay_ms( BLINK_DELAY_MS ) ; // wait.
    PORTC.OUTCLR = 0b11111111 ; // set  all output low.
    _delay_ms( BLINK_DELAY_MS ) ; // wait.
  }
}

In this code, output portC 0,1,3,4,5,6,7 blinking well, but portC 2 not blink (the RX input). No output, either HIGH or LOW. This is broken!

Yes, but i don't use debugger.

All port in chip are ok. I make some test in all pin (PortA, B, C, D, E, F) and all ok (except portC2).

I Have check this file: xio.usart.h

Inside this file there is pre-processor #define block:

-------------------------------------
//**** USB device configuration ****
//NOTE: XIO_BLOCK / XIO_NOBLOCK affects reads only. Writes always block. (see xio.h)

#define USB_BAUD XIO_BAUD_115200
#define USB_FLAGS (XIO_BLOCK | XIO_ECHO | XIO_XOFF | XIO_LINEMODE )

#define USB_USART USARTC0 // USB usart
#define USB_RX_ISR_vect USARTC0_RXC_vect // (RX) reception complete IRQ
#define USB_TX_ISR_vect USARTC0_DRE_vect // (TX) data register empty IRQ

#define USB_PORT PORTC // port where the USART is located
#define USB_CTS_bp (1) // CTS - bit position (pin is wired on board)
#define USB_CTS_bm (1<<USB_CTS_bp) // CTS - bit mask
#define USB_CTS_PINCTRL PIN1CTRL // CTS - PINxCTRL assignment
#define USB_CTS_ISR_vect PORTC_INT0_vect // CTS - Interrupt Vector (PORTC_INT0_vect or PORTC_INT1_vect)
#define USB_CTS_INTMSK INT0MASK // CTS - Interrupt Mask Register (INT0MASK or INT1MASK)
#define USB_CTS_INTLVL (PORT_INT0LVL_LO_gc)

#define USB_RTS_bp (0) // RTS - bit position (pin is wired on board)
#define USB_RTS_bm (1<<USB_RTS_bp) // RTS - bit mask

#define USB_RX_bm (1<<2) // RX pin bit mask
#define USB_TX_bm (1<<3) // TX pin bit mask

#define USB_INBITS_bm (USB_CTS_bm | USB_RX_bm) // input bits
#define USB_OUTBITS_bm (USB_RTS_bm | USB_TX_bm) // output bits
#define USB_OUTCLR_bm (USB_RTS_bm) // outputs init'd to 0
#define USB_OUTSET_bm (USB_TX_bm) // outputs init'd to 1
-------------------------

I think that this is the critical point. Can anyone confirm?

YEAAAAHHHH! It's works!

For anyone with my problem:

Open the file xio_usart.h. Go down at this section: //**** USB device configuration ****

In this section code you must change these lines:

#define USB_USART USARTC0 // USB usart
#define USB_RX_ISR_vect USARTC0_RXC_vect // (RX) reception complete IRQ
#define USB_TX_ISR_vect USARTC0_DRE_vect // (TX) data register empty IRQ

with these lines:

#define USB_USART USARTC1 // USB usart
#define USB_RX_ISR_vect USARTC1_RXC_vect // (RX) reception complete IRQ
#define USB_TX_ISR_vect USARTC1_DRE_vect // (TX) data register empty IRQ
(only change the C0 with C1 serial port)

These lines:
#define USB_CTS_bp (1) // CTS - bit position (pin is wired on board)
#define USB_CTS_PINCTRL PIN1CTRL // CTS - PINxCTRL assignment

with these lines:
#define USB_CTS_bp (5) // CTS - bit position (pin is wired on board)
#define USB_CTS_PINCTRL PIN5CTRL // CTS - PINxCTRL assignment
(move the old pin1 to new pin5 for CTS signal)

This line:
#define USB_RTS_bp (0) // RTS - bit position (pin is wired on board)

with line:
#define USB_RTS_bp (4) // RTS - bit position (pin is wired on board)
(move the old pin 0 to new pin 4 for RTS signal)

These lines:
#define USB_RX_bm (1<<2) // RX pin bit mask
#define USB_TX_bm (1<<3) // TX pin bit mask

with these lines:
#define USB_RX_bm (1<<6) // RX pin bit mask
#define USB_TX_bm (1<<7) // TX pin bit mask
(move the old 2,3 RX-TX pins to new pins 6 and 7)

In this section: //**** RS485 device configuration (no echo or CRLF) ****
you must change the RS485-Serial pins and the Interrupts vector.

replaced these lines:

#define RS485_USART USARTC1 // RS485 usart
#define RS485_RX_ISR_vect USARTC1_RXC_vect // (RX) reception complete IRQ
#define RS485_TX_ISR_vect USARTC1_DRE_vect // (TX) data register empty IRQ
#define RS485_TXC_ISR_vect USARTC1_TXC_vect // (TX) transmission complete IRQ

#define RS485_PORT PORTC // port where USART is located
#define RS485_RE_bm (1<<4) // RE (Receive Enable) pin - active lo
#define RS485_DE_bm (1<<5) // DE (Data Enable)(TX) - active hi
#define RS485_RX_bm (1<<6) // RX pin
#define RS485_TX_bm (1<<7) // TX pin

with these lines:

#define RS485_USART USARTC0 // RS485 usart
#define RS485_RX_ISR_vect USARTC0_RXC_vect // (RX) reception complete IRQ
#define RS485_TX_ISR_vect USARTC0_DRE_vect // (TX) data register empty IRQ
#define RS485_TXC_ISR_vect USARTC0_TXC_vect // (TX) transmission complete IRQ

#define RS485_PORT PORTC // port where USART is located
#define RS485_RE_bm (1<<0) // RE (Receive Enable) pin - active lo
#define RS485_DE_bm (1<<1) // DE (Data Enable)(TX) - active hi
#define RS485_RX_bm (1<<2) // RX pin
#define RS485_TX_bm (1<<3) // TX pin
------------------------

Basically we reversed the USB-serial with RS485-serial (not used)

Good work...

Guido