Forum Post: RE: UART with auto flow for omapl138evm

Hi,

[quote]

PINMUX0 = 0x44000000;  //Selects Function UART2_RTS and UART2_CTS
PINMUX4 = 0x00220000; //Selects Function UART2_TXD and  UART2_RXD

I am not changing PUPD_SEL,PUPD_ENA are using default values.

[/quote]

As per the code, You are writing '0' value to the PINMUX registers.

Try to change like this,

PINMUX0 &= 0x00FFFFFF;  //Selects Function UART2_RTS and UART2_CTS

PINMUX0 |=  0x44000000;

PINMUX4 &= 0xFF00FFFF; //Selects Function UART2_TXD and  UART2_RXD

PINMUX4 |= 0x00220000;