Mercurial > ecos
annotate examples/serial.c @ 2300:654c837cc618
* include/disk.h (DISK_CHANNEL): No need for extra _part_dev
slot intended for entire disk's own devtab.
* src/disk.c (disk_lookup): Just access pdevs_dev directly
with no adjusted offset.
(disk_init): No longer set entry 0 from device devtab.
It's unnecessary.
* include/disk.h: Merge eCosCentric CVS with public eCos CVS.
This merges (and therefore changes) the API. ChangeLog
entries have been incorporated in the correct places below.
* include/diskio.h: Also merged.
* cdl/io_disk.cdl: Also merged.
* src/disk.c: Also merged.
* src/disk.c (read_partition): Switched to favour LBA partition
information in partition tables. This also means we don't now rely
on the driver reporting a correct CHS size for the disk.
(disk_bread, disk_bwrite): API changed to take length in sectors
rather than bytes. Also call hardware driver to transfer in
(up to) max_transfer sized chunks, rather than a sector at a
time. Call in to driver now made with DSR lock claimed, to avoid a
race condition between the DSR and the calling thread.
(disk_get_config): Added phys_block_size to channel info.
* include/diskio.h (struct cyg_disk_identify_t): Added
phys_block_size and max_transfer fields. These must be filled in
by the driver.
* include/disk.h (DISK_CHANNEL_INIT): New macro. Allows a
DISK_CHANNEL to be defined dynamically.
* src/disk.c (disk_bread, disk_bwrite): Made calls to
cyg_thread_yield() dependent on presence ok kernel.
* src/disk.c (disk_bwrite): Uncomment the cyg_thread_yield() at
the end to prevent thread starvation between threads at the same
priority.
(disk_bread): Ditto.
* src/disk.c (read_partition): Changed to account for very large
disks which report bogus CHS geometry. We can only use the LBA
partition parameters in such disks.
(disk_set_config): Added some extra debug output.
* src/disk.c:
Various changes to support disconnect/reconnect of changeable
media.
* include/diskio.h: Added mount counter to disk_info structure.
* include/disk.h: Changed disk_disconnected() function to take a
pointer to a struct disk_channel rather than a struct
cyg_devtab_entry. Added mount count to disk_channel structure.
Moved include of diskio.h to end to fix declaration problems.
* src/disk.c: Fixed bug in write routine where controller result
field was not being initialized. Added signals on controller queue
condition variable after setting controller busy flag to false.
* include/disk.h: Made controller result and busy fields
volatile. Just in case.
* include/disk.h:
* src/disk.c:
Many changes. Added additional disk_controller data structure to
better reflect hardware structure. Added support for serialization
of multithreaded accesses to a single controller. Added support
for asynchronous, interrupt driven, IO operations. Various
tidies.
| author | jlarmour |
|---|---|
| date | Thu, 21 Sep 2006 16:38:38 +0000 |
| parents | ead06911cbae |
| children |
| rev | line source |
|---|---|
| 168 | 1 /* |
| 2 * Written 1999-03-19 by Jonathan Larmour, Cygnus Solutions | |
| 3 * This file is in the public domain and may be used for any purpose | |
| 4 */ | |
| 5 | |
| 6 /* CONFIGURATION CHECKS */ | |
| 7 | |
| 8 #include <pkgconf/system.h> /* which packages are enabled/disabled */ | |
| 9 #ifdef CYGPKG_KERNEL | |
| 10 # include <pkgconf/kernel.h> | |
| 11 #endif | |
| 12 #ifdef CYGPKG_LIBC | |
| 13 # include <pkgconf/libc.h> | |
| 14 #endif | |
| 15 #ifdef CYGPKG_IO_SERIAL | |
| 16 # include <pkgconf/io_serial.h> | |
| 17 #endif | |
| 18 | |
| 19 #ifndef CYGFUN_KERNEL_API_C | |
| 20 # error Kernel API must be enabled to build this example | |
| 21 #endif | |
| 22 | |
| 23 #ifndef CYGPKG_LIBC_STDIO | |
| 24 # error C library standard I/O must be enabled to build this example | |
| 25 #endif | |
| 26 | |
| 27 #ifndef CYGPKG_IO_SERIAL_HALDIAG | |
| 28 # error I/O HALDIAG pseudo-device driver must be enabled to build this example | |
| 29 #endif | |
| 30 | |
| 31 /* INCLUDES */ | |
| 32 | |
| 33 #include <stdio.h> /* printf */ | |
| 34 #include <string.h> /* strlen */ | |
| 35 #include <cyg/kernel/kapi.h> /* All the kernel specific stuff */ | |
| 36 #include <cyg/io/io.h> /* I/O functions */ | |
| 37 #include <cyg/hal/hal_arch.h> /* CYGNUM_HAL_STACK_SIZE_TYPICAL */ | |
| 38 | |
| 39 | |
| 40 | |
| 41 /* DEFINES */ | |
| 42 | |
| 43 #define NTHREADS 1 | |
| 44 #define STACKSIZE ( CYGNUM_HAL_STACK_SIZE_TYPICAL + 4096 ) | |
| 45 | |
| 46 /* STATICS */ | |
| 47 | |
| 48 static cyg_handle_t thread[NTHREADS]; | |
| 49 static cyg_thread thread_obj[NTHREADS]; | |
| 50 static char stack[NTHREADS][STACKSIZE]; | |
| 51 | |
| 52 /* FUNCTIONS */ | |
| 53 | |
| 54 static void simple_prog(CYG_ADDRESS data) | |
| 55 { | |
| 56 cyg_io_handle_t handle; | |
| 57 Cyg_ErrNo err; | |
| 58 const char test_string[] = "serial example is working correctly!\n"; | |
| 59 cyg_uint32 len = strlen(test_string); | |
| 60 | |
| 61 printf("Starting serial example\n"); | |
| 62 | |
| 63 err = cyg_io_lookup( "/dev/haldiag", &handle ); | |
| 64 | |
| 65 if (ENOERR == err) { | |
| 66 printf("Found /dev/haldiag. Writing string....\n"); | |
| 67 err = cyg_io_write( handle, test_string, &len ); | |
| 68 } | |
| 69 | |
| 70 if (ENOERR == err) { | |
| 71 printf("I think I wrote the string. Did you see it?\n"); | |
| 72 } | |
| 73 | |
| 74 printf("Serial example finished\n"); | |
| 75 | |
| 76 } | |
| 77 | |
| 78 void cyg_user_start(void) | |
| 79 { | |
| 80 cyg_thread_create(4, simple_prog, (cyg_addrword_t) 0, "serial", | |
| 81 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); | |
| 82 cyg_thread_resume(thread[0]); | |
| 83 } |