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annotate packages/devs/wallclock/mips/ref4955/current/src/wallclock_ref4955.cxx @ 134:d2f49caf9e38 ecos-sw-2000-11-03

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Merge from eCos master repository on 2000-11-03-09:00:49-GMT
author jlarmour
date Fri, 03 Nov 2000 21:17:40 +0000
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children 11b54a94cf58
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1 //==========================================================================
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2 //
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3 // devs/wallclock/mips/ref4955/ref4955.cxx
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4 //
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5 // Wallclock implementation
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jskov
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35 // Contributors: jskov
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36 // Date: 2000-05-25
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37 // Purpose: Wallclock driver for REF4955
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38 //
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39 //####DESCRIPTIONEND####
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40 //
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41 //==========================================================================
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42
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43 #include <pkgconf/kernel.h> // Kernel config
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44 #include <pkgconf/wallclock.h> // Wallclock device config
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45
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46 #include <cyg/hal/hal_io.h> // IO macros
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47 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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48
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49 #include <cyg/io/wallclock.hxx> // The WallClock API
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50 #include <cyg/io/wallclock/wallclock.inl> // Helpers
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51
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52 #include <cyg/infra/diag.h> // For debugging
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53
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54 // REF4955 has a Dallas 1742W part.
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55 #define DS_BASE 0xb5000000
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56 #include <cyg/io/wallclock/ds1742.inl>
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57
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58 //-----------------------------------------------------------------------------
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59 // Functions required for the hardware-driver API.
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60
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61 // Returns the number of seconds elapsed since 1970-01-01 00:00:00.
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62 cyg_uint32
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63 Cyg_WallClock::get_hw_seconds(void)
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64 {
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65 cyg_uint32 year, month, mday, hour, minute, second;
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66
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67 get_ds_hwclock(&year, &month, &mday, &hour, &minute, &second);
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68
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69 #if 0
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70 // This will cause the test to eventually fail due to these printouts
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71 // causing timer interrupts to be lost...
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72 diag_printf("year %02d\n", year);
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73 diag_printf("month %02d\n", month);
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74 diag_printf("mday %02d\n", mday);
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75 diag_printf("hour %02d\n", hour);
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76 diag_printf("minute %02d\n", minute);
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77 diag_printf("second %02d\n", second);
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78 #endif
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79
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80 cyg_uint32 now = _simple_mktime(year, month, mday, hour, minute, second);
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81 return now;
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82 }
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83
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84 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
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85
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86 // Sets the clock. Argument is seconds elapsed since 1970-01-01 00:00:00.
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87 void
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88 Cyg_WallClock::set_hw_seconds( cyg_uint32 secs )
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89 {
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90 cyg_uint32 year, month, mday, hour, minute, second;
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91
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92 _simple_mkdate(secs, &year, &month, &mday, &hour, &minute, &second);
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93
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94 set_ds_hwclock(year, month, mday, hour, minute, second);
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95 }
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96
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97 #endif
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98
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99 void
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100 Cyg_WallClock::init_hw_seconds(void)
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101 {
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102 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
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103 init_ds_hwclock();
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104 #else
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105 // This is our base: 1970-01-01 00:00:00
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106 // Set the HW clock - if for nothing else, just to be sure it's in a
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107 // legal range. Any arbitrary base could be used.
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108 // After this the hardware clock is only read.
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109 set_ds_hwclock(1970,1,1,0,0,0);
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110 #endif
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111 }
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112
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113 //-----------------------------------------------------------------------------
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114 // End of devs/wallclock/mips/ref4955/wallclock_ref4955.cxx