xmega USART transmition problem

[Sharagim]

Hi,
I have an Atxmega128A3U , and a CO2 sensor (COZIR) which is UART.
Sensor is connected to PORTF. On PORTC I made an RS232 connection.
In my code I made a bridge between these two which pass through between PORTC to PORTF.
When I send command from PC to micro it is working ok I mean I send to micro and micro send to sensor I see correct reply from sensor.
But When micro directly sending from its own I see wrong reply and Sesor saying "command is unrecognized".
I checked from micro output with PC and I see in terminal it is ok and the character is what I want.
I tested on both 2 and 32 MHZ.

	PORTF.DIRSET = PIN3_bm;
	PORTF.DIRCLR = PIN2_bm;
	USART_InterruptDriver_Initialize(&USART_data1, &USART1, USART_DREINTLVL_LO_gc);
	USART_Format_Set(USART_data1.usart, USART_CHSIZE_8BIT_gc,USART_PMODE_DISABLED_gc, false);
	USART_RxdInterruptLevel_Set(USART_data1.usart, USART_RXCINTLVL_LO_gc);
	USART_Baudrate_Set(&USART1, 207 , 0);
	USART_Rx_Enable(USART_data1.usart);
	USART_Tx_Enable(USART_data1.usart);
	PMIC.CTRL |= PMIC_LOLVLEX_bm;
	sei();
	while (!(USART_IsTXDataRegisterEmpty(USART_data1.usart))){}
	USART_PutChar(&USART1, (int)'Y');
	while (!(USART_IsTXDataRegisterEmpty(USART_data1.usart))){}
	USART_PutChar(&USART1, 13);
	while (!(USART_IsTXDataRegisterEmpty(USART_data1.usart))){}
	USART_PutChar(&USART1, 10);
	while (!(USART_IsTXDataRegisterEmpty(USART_data1.usart))){}
	****** I am getting wrong reply ******

 

[kalbun]

Are you sure you need to send 13 + 10, and not only 10 ? This could be worth of a try.
At the moment I have no further suggestions

 

[Sharagim]

Thanks for your reply.
I tried many hours on this system and I found out on system start-up one or some characters went into COZIR. I don't know yet if it is from COZIR or xmega!
So after first submit by \r\n it will see some unknown command, After that the other command work well.

 

[jayanth.devarayanadurga]

Post your circuit. Try to put a pullup or pulldown on UART lines of the uC.

 

[Sharagim]

Thanks for reply.
I pullup the tx and problem solved.