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See: http://e2e.ti.com/support/microcontrollers/stellaris_arm_cortex-m3_microcontroller/f/474/t/113624.aspx

thanks for the response, Andy. 

i thought i was the only one who couldn't find the user manual. haha.. 

i was wondering about how to 'UART_BUFFERED' feature in 'uartstdio.h' code. 

because my LM3s608 microcontroller has to handle 20*8bit incoming UART data, while the RX FIFO is only 16*8bit. 

have you ever dealt with the same problem?

thanks. 

dear Andy, 

i've tried to follow your advice. 

i found 'UART Standard IO Module' manual in DK-LM3S828 Firmware Development Package User's Guide

then, i made my own code as follows:

--------------------------------------------------------------------------

int main(void)

{

    SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |

                   SYSCTL_XTAL_8MHZ);

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    UARTStdioInit(0);

    UARTIntEnable(UART0_BASE, UART_INT_RT );

    UARTIntRegister(UART0_BASE, UARTStdioIntHandler);

    while (1)

    {

    }

}

void UARTStdioIntHandler (void)

{

char i;

i=UARTgetc();

UARTwrite(&i,1);

}

--------------------------------------------------------------------------

then, i tried to send 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' to my microcontroller. 

but, what i got is only 'ABCDEFGHIJKLMNOP' which means i only got 16*8bit of data. 

i still have no idea to use 'UART_BUFFERED' feature since i couldn't find an example about it. 

please, if you have any example code about it, may i get one?

thanks a lot, Andy

IIRC, the Serial-to-Ethernet code uses the "Buffered" (interrupt-driven) mode...

Your interrupt handler is wrong.

Look again at the User Manual, and use the provided interrupt handler.