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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [idp/] [console/] [console.c] - Rev 593
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/* * This file contains the Motorola IDP console IO package. * * Written by Doug McBride, Colorado Space Grant College * Based off of the board support packages of RTEMS * * Updated to RTEMS 3.2.0 by Joel Sherrill. * * $Id: console.c,v 1.2 2001-09-27 12:00:09 chris Exp $ */ #define MIDP_INIT #include <bsp.h> #include <rtems/libio.h> #include <ringbuf.h> Ring_buffer_t Console_Buffer[ 2 ]; rtems_isr C_Receive_ISR(rtems_vector_number vector); /* console_initialize * * This routine initializes the console IO driver. * * Input parameters: NONE * * Output parameters: NONE * * Return values: */ rtems_device_driver console_initialize( rtems_device_major_number major, rtems_device_minor_number minor, void *arg ) { rtems_status_code status; Ring_buffer_Initialize( &Console_Buffer[ 0 ] ); Ring_buffer_Initialize( &Console_Buffer[ 1 ] ); init_pit(); status = rtems_io_register_name( "/dev/console", major, (rtems_device_minor_number) 0 ); if (status != RTEMS_SUCCESSFUL) rtems_fatal_error_occurred(status); status = rtems_io_register_name( "/dev/tty00", major, (rtems_device_minor_number) 0 ); if (status != RTEMS_SUCCESSFUL) rtems_fatal_error_occurred(status); status = rtems_io_register_name( "/dev/tty01", major, (rtems_device_minor_number) 1 ); if (status != RTEMS_SUCCESSFUL) rtems_fatal_error_occurred(status); return RTEMS_SUCCESSFUL; } /* is_character_ready * * This routine returns TRUE if a character is available. * * Input parameters: NONE * * Output parameters: NONE * * Return values: */ rtems_boolean is_character_ready( char *ch, int port ) { if ( Ring_buffer_Is_empty( &Console_Buffer[ port ] ) ) return FALSE; Ring_buffer_Remove_character( &Console_Buffer[ port ], *ch ); return TRUE; } /* quick_char_check * * This routine returns TRUE if a character is available. * It is different from above because it does not disturb the ring buffer * * Input parameters: NONE * * Output parameters: NONE * * Return values: */ rtems_boolean quick_char_check( int port ) { if ( Ring_buffer_Is_empty( &Console_Buffer[ port ] ) ) return FALSE; return TRUE; } /* inbyte * * This routine reads a character from the UART through a buffer. * * Input parameters: NONE * * Output parameters: NONE * * Return values: * character read from UART */ char inbyte( int port ) { unsigned char tmp_char; /* If you come into this routine without checking is_character_ready() first and you want nonblocking code, then it's your own fault */ while ( !is_character_ready( &tmp_char, port ) ); return tmp_char; } /* outbyte * * This routine transmits a character out the M68681. It supports * XON/XOFF flow control. * * Input parameters: * ch - character to be transmitted * * Output parameters: NONE */ void outbyte( char ch, int port ) { switch ( port ) { case 0: transmit_char( ch ); break; case 1: transmit_char_portb( ch ); break; } } /* * Open entry point */ rtems_device_driver console_open( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { return RTEMS_SUCCESSFUL; } /* * Close entry point */ rtems_device_driver console_close( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { return RTEMS_SUCCESSFUL; } /* * read bytes from the serial port. We only have stdin. */ rtems_device_driver console_read( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { rtems_libio_rw_args_t *rw_args; char *buffer; int maximum; int count = 0; rw_args = (rtems_libio_rw_args_t *) arg; buffer = rw_args->buffer; maximum = rw_args->count; if ( minor > 1 ) return RTEMS_INVALID_NUMBER; for (count = 0; count < maximum; count++) { buffer[ count ] = inbyte( minor ); if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { buffer[ count++ ] = '\n'; break; } } rw_args->bytes_moved = count; return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; } /* * write bytes to the serial port. Stdout and stderr are the same. */ rtems_device_driver console_write( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { int count; int maximum; rtems_libio_rw_args_t *rw_args; char *buffer; rw_args = (rtems_libio_rw_args_t *) arg; buffer = rw_args->buffer; maximum = rw_args->count; if ( minor > 1 ) return RTEMS_INVALID_NUMBER; for (count = 0; count < maximum; count++) { if ( buffer[ count ] == '\n') { outbyte('\r', minor ); } outbyte( buffer[ count ], minor ); } rw_args->bytes_moved = maximum; return 0; } /* * IO Control entry point */ rtems_device_driver console_control( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { return RTEMS_SUCCESSFUL; }
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