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/**
* @file
* @ingroup sparc_leon2
* @brief TTY driver for the serial ports on the LEON
*/
/*
* This file contains the TTY driver for the serial ports on the LEON.
*
* This driver uses the termios pseudo driver.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <assert.h>
/*
* console_outbyte_polled
*
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
int port,
unsigned char ch
)
{
if ( port == 0 ) {
while ( (LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_THE) == 0 );
LEON_REG.UART_Channel_1 = (unsigned int) ch;
return;
}
while ( (LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_THE) == 0 );
LEON_REG.UART_Channel_2 = (unsigned int) ch;
}
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking( int port )
{
switch (port) {
case 0:
if (LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_ERR) {
LEON_REG.UART_Status_1 = ~LEON_REG_UART_STATUS_ERR;
}
if ((LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_DR) == 0)
return -1;
return (int) LEON_REG.UART_Channel_1;
return 1;
case 1:
if (LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_ERR) {
LEON_REG.UART_Status_2 = ~LEON_REG_UART_STATUS_ERR;
}
if ((LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_DR) == 0)
return -1;
return (int) LEON_REG.UART_Channel_2;
default:
assert( 0 );
}
return -1;
}
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