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168
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1 /* |
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2 * Written 1999-03-19 by Jonathan Larmour, Cygnus Solutions |
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3 * This file is in the public domain and may be used for any purpose |
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4 */ |
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5 |
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6 /* CONFIGURATION CHECKS */ |
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7 |
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8 #include <pkgconf/system.h> /* which packages are enabled/disabled */ |
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9 #ifdef CYGPKG_KERNEL |
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10 # include <pkgconf/kernel.h> |
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11 #endif |
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12 #ifdef CYGPKG_LIBC |
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13 # include <pkgconf/libc.h> |
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14 #endif |
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15 #ifdef CYGPKG_IO_SERIAL |
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16 # include <pkgconf/io_serial.h> |
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17 #endif |
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18 |
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19 #ifndef CYGFUN_KERNEL_API_C |
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20 # error Kernel API must be enabled to build this example |
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21 #endif |
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22 |
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23 #ifndef CYGPKG_LIBC_STDIO |
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24 # error C library standard I/O must be enabled to build this example |
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25 #endif |
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26 |
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27 #ifndef CYGPKG_IO_SERIAL_HALDIAG |
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28 # error I/O HALDIAG pseudo-device driver must be enabled to build this example |
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29 #endif |
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30 |
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31 /* INCLUDES */ |
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32 |
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33 #include <stdio.h> /* printf */ |
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34 #include <string.h> /* strlen */ |
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35 #include <cyg/kernel/kapi.h> /* All the kernel specific stuff */ |
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36 #include <cyg/io/io.h> /* I/O functions */ |
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37 #include <cyg/hal/hal_arch.h> /* CYGNUM_HAL_STACK_SIZE_TYPICAL */ |
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38 |
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39 |
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40 |
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41 /* DEFINES */ |
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42 |
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43 #define NTHREADS 1 |
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44 #define STACKSIZE ( CYGNUM_HAL_STACK_SIZE_TYPICAL + 4096 ) |
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45 |
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46 /* STATICS */ |
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47 |
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48 static cyg_handle_t thread[NTHREADS]; |
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49 static cyg_thread thread_obj[NTHREADS]; |
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50 static char stack[NTHREADS][STACKSIZE]; |
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51 |
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52 /* FUNCTIONS */ |
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53 |
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54 static void simple_prog(CYG_ADDRESS data) |
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55 { |
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56 cyg_io_handle_t handle; |
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57 Cyg_ErrNo err; |
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58 const char test_string[] = "serial example is working correctly!\n"; |
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59 cyg_uint32 len = strlen(test_string); |
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60 |
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61 printf("Starting serial example\n"); |
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62 |
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63 err = cyg_io_lookup( "/dev/haldiag", &handle ); |
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64 |
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65 if (ENOERR == err) { |
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66 printf("Found /dev/haldiag. Writing string....\n"); |
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67 err = cyg_io_write( handle, test_string, &len ); |
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68 } |
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69 |
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70 if (ENOERR == err) { |
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71 printf("I think I wrote the string. Did you see it?\n"); |
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72 } |
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73 |
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74 printf("Serial example finished\n"); |
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75 |
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76 } |
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77 |
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78 void cyg_user_start(void) |
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79 { |
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80 cyg_thread_create(4, simple_prog, (cyg_addrword_t) 0, "serial", |
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81 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); |
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82 cyg_thread_resume(thread[0]); |
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83 } |
