How to change UART baudrate on run time.

[#1]

Hi, I am working on XMC4100 UART. I wanna change UART baudrate at run time.I wanna do these baudrate update in same function. This is my use case ..

Switch(Baudrate)
{

case 9600:
UART_Baudrate(9600);
Send("Baudrate at 9600 \n");
break;
case 115200:
UART_Baudrate(115200);
Send("Baudrate at 115200 \n");
break;
case 256000:
UART_Baudrate(256000);
Send("Baudrate at 256000 \n");
break
}


The baudrate which was set first (9600) is working fine. But when I am trying to update new baudrate, there is a mismatch. please help

[Travis]

You have to ensure that the UART had complete transmission and receive, before you can change the baud rate.

[#3]

Hi Travis, Thanks for the response. Got solution for this problem. I just had to check TX and RX idle status bits before updating the new baudrate.

[#4]

Salman11053 wrote:
Hi Travis, Thanks for the response. Got solution for this problem. I just had to check TX and RX idle status bits before updating the new baudrate.

could you please spell out which registers are you referring to? Do you mean PSR.RXIDLE and PSR.TXIDLE ?

[chismo]

Hello,

Yes, these must refer to the bits PSR.RXIDLE and PSR.TXIDLE.

Regards,
Min Wei