diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/idp/console/console.c')
| -rw-r--r-- | c/src/lib/libbsp/m68k/idp/console/console.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/idp/console/console.c b/c/src/lib/libbsp/m68k/idp/console/console.c new file mode 100644 index 0000000000..cd64e27e84 --- /dev/null +++ b/c/src/lib/libbsp/m68k/idp/console/console.c @@ -0,0 +1,284 @@ +/* + * 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. + * + * $Id$ + */ + +#define MIDP_INIT + +#include <bsp.h> +#include <rtems/libio.h> + +#include <ringbuf.h> + +Ring_buffer_t 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( &Buffer[ 0 ] ); + Ring_buffer_Initialize( &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( &Buffer[ port ] ) ) + return FALSE; + + Ring_buffer_Remove_character( &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( &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'; + buffer[ count ] = 0; + 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; +} |