problems with UART interrupt

hi all,

The problem is when I start the uart_interrupt to get user input from keyboard, I found that the web server will be slow down and even stop echoing our request. If I disable the uart_interrupt, the web server works well again. It is strange that I didn't do anything special in our UART ISR.

Hopes you can help me

void uart_interrupt (void) small interrupt 4 using 0
/* ------------------------------------------------------------------------ --
* Purpose : Interrupt function. Save received char in buffer.
* Remarks : interrupt "4": seriel port interrupt, using cpu internal mem. bank "2"

************************************************************************ */
{
unsigned char ch;
int i;
// GPIO_LED = 0;//Light on LED
P3RxD = 1; //Force pull high //<<<<<<
ES = 0;
EA = 0;
if (RI) {/**************** Second problem ******************/
RI = 0;
/* save any framing error */
if (SM0) {
// uart_framing_error = TRUE;
SM0 = 0;
}
ch = SBUF;
rx_buf[rx_head] = ch;//save into ring buffer
rx_head = (rx_head + 1) & (RX_BUF_SIZE - 1);
}
P3TxD = 1; //Force pull high //<<<<<<
EA = 1;
ES = 1;
}

reply me as early as possible.

regards
john

void uart_interrupt (void) small interrupt 4 using 0

/****** You define USING 0 -> it is BANK 0 *******/
/* ------------------------------------------------------------------------ --
* Purpose : Interrupt function. Save received char in buffer.
* Remarks : interrupt "4": seriel port interrupt, using cpu internal mem. bank "2"

************************************************************************ */
{
unsigned char ch;
int i;
// GPIO_LED = 0;//Light on LED
P3RxD = 1; //Force pull high //<<<<<< //******* do not need
ES = 0; //******* do not need
EA = 0; //******* do not need
if (RI) {/**************** Second problem ******************/
RI = 0;
/* save any framing error */
if (SM0) { // uart_framing_error = TRUE; SM0 = 0;
return ; //******* char into SBUF is INVALID !!!}
ch = SBUF;
rx_buf[rx_head] = ch;//save into ring buffer
rx_head = (rx_head + 1) & (RX_BUF_SIZE - 1);
//*********** RX_BUF_SIZE is power of 2?
}
P3TxD = 1; //Force pull high //<<<<<< //******* do not need
EA = 1; //******* do not need
ES = 1; //******* do not need
}

//******* do not need -> better to delete

Where is trasmitting part ?
Must be error hiding into ?

hi kukaz

i did a mistake,i didnt add TI part,must have TI=0,you are right.

thanks
john