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/*
* This file contains the TTY driver for the serial ports on the erc32.
*
* 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.com/license/LICENSE.
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <stdlib.h>
/*
* console_outbyte_polled
*
* This routine transmits a character using polling.
*/
void console_outbyte_polled(
int port,
unsigned char ch
)
{
if ( port == 0 ) {
while ( (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA) == 0 );
ERC32_MEC.UART_Channel_A = (unsigned int) ch;
return;
}
while ( (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB) == 0 );
ERC32_MEC.UART_Channel_B = (unsigned int) ch;
}
/*
* console_inbyte_nonblocking
*
* This routine polls for a character.
*/
int console_inbyte_nonblocking( int port )
{
int UStat;
UStat = ERC32_MEC.UART_Status;
switch (port) {
case 0:
if (UStat & ERC32_MEC_UART_STATUS_ERRA) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
ERC32_MEC.Control = ERC32_MEC.Control;
}
if ((UStat & ERC32_MEC_UART_STATUS_DRA) == 0)
return -1;
return (int) ERC32_MEC.UART_Channel_A;
case 1:
if (UStat & ERC32_MEC_UART_STATUS_ERRB) {
ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
ERC32_MEC.Control = ERC32_MEC.Control;
}
if ((UStat & ERC32_MEC_UART_STATUS_DRB) == 0)
return -1;
return (int) ERC32_MEC.UART_Channel_B;
default:
rtems_fatal_error_occurred( 'D' << 8 | (port & 0xffffff) );
}
return -1;
}
/*
* To support printk
*/
#include <rtems/bspIo.h>
void BSP_output_char_f(char c) { console_outbyte_polled( 0, c ); }
BSP_output_char_function_type BSP_output_char = BSP_output_char_f;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
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