forked from Imagelibrary/rtems
b21b0ab3e7
* .cvsignore, ChangeLog, Makefile.am, README, bsp_specs, configure.in, times, clock/.cvsignore, clock/Makefile.am, clock/ckinit.c, console/.cvsignore, console/Makefile.am, console/console.c, console/consolereserveresources.c, console/debugputs.c, gnatsupp/.cvsignore, gnatsupp/Makefile.am, gnatsupp/gnatsupp.c, include/.cvsignore, include/Makefile.am, include/bsp.h, include/coverhd.h, include/leon.h, start/.cvsignore, start/Makefile.am, startup/.cvsignore, startup/Makefile.am, startup/boardinit.S, startup/linkcmds, startup/setvec.c, startup/spurious.c, timer/.cvsignore, timer/Makefile.am, timer/timer.c, tools/.cvsignore, tools/Makefile.am, tools/configure.in, tools/runtest.in, wrapup/.cvsignore, wrapup/Makefile.am: New file.
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
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* This file contains the TTY driver for the serial ports on the LEON.
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*
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* This driver uses the termios pseudo driver.
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <bsp.h>
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#include <rtems/libio.h>
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#include <stdlib.h>
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#include <assert.h>
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/*
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* console_outbyte_polled
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*
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* This routine transmits a character using polling.
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*/
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void console_outbyte_polled(
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int port,
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char ch
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)
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{
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if ( port == 0 ) {
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while ( (LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_THE) == 0 );
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LEON_REG.UART_Channel_1 = (int) ch;
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return;
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}
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while ( (LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_THE) == 0 );
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LEON_REG.UART_Channel_2 = (int) ch;
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}
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/*
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* console_inbyte_nonblocking
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*
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* This routine polls for a character.
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*/
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int console_inbyte_nonblocking( int port )
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{
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switch (port) {
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case 0:
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if (LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_ERR) {
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LEON_REG.UART_Status_1 = ~LEON_REG_UART_STATUS_ERR;
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}
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if ((LEON_REG.UART_Status_1 & LEON_REG_UART_STATUS_DR) == 0)
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return -1;
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return (int) LEON_REG.UART_Channel_1;
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return 1;
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case 1:
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if (LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_ERR) {
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LEON_REG.UART_Status_2 = ~LEON_REG_UART_STATUS_ERR;
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}
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if ((LEON_REG.UART_Status_2 & LEON_REG_UART_STATUS_DR) == 0)
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return -1;
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return (int) LEON_REG.UART_Channel_2;
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default:
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assert( 0 );
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}
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return -1;
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}
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/*
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* DEBUG_puts
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*
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* This should be safe in the event of an error. It attempts to insure
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* that no TX empty interrupts occur while it is doing polled IO. Then
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* it restores the state of that external interrupt.
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*
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* Input parameters:
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* string - pointer to debug output string
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*
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* Output parameters: NONE
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*
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* Return values: NONE
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*/
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void DEBUG_puts(
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char *string
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)
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{
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char *s;
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unsigned32 old_level;
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LEON_Disable_interrupt( LEON_INTERRUPT_UART_1_RX_TX, old_level );
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LEON_REG.UART_Control_1 = LEON_REG_UART_CTRL_TE;
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for ( s = string ; *s ; s++ )
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console_outbyte_polled( 0, *s );
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console_outbyte_polled( 0, '\r' );
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console_outbyte_polled( 0, '\n' );
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LEON_Restore_interrupt( LEON_INTERRUPT_UART_1_RX_TX, old_level );
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}
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