1 | /* |
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2 | * Real Time Clock (MK48T08) for RTEMS on MVME162 |
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3 | * |
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4 | * Author: |
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5 | * COPYRIGHT (C) 1997 |
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6 | * by Katsutoshi Shibuya - BU Denken Co.,Ltd. - Sapporo - JAPAN |
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7 | * ALL RIGHTS RESERVED |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * This material is a part of the MVME162 Board Support Package |
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14 | * for the RTEMS executive. Its licensing policies are those of the |
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15 | * RTEMS above. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #include <rtems.h> |
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21 | #include <tod.h> |
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22 | |
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23 | #define tod ((volatile unsigned char *)0xfffc1ff8) |
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24 | |
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25 | static int getTod(int n, unsigned char mask) |
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26 | { |
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27 | unsigned char x; |
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28 | |
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29 | x = tod[n]&mask; |
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30 | return (x>>4)*10+(x&0x0f); |
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31 | } |
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32 | |
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33 | static void setTod(int n, unsigned char d) |
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34 | { |
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35 | tod[n] = ((d/10)<<4)+(d%10); |
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36 | } |
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37 | |
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38 | void setRealTimeToRTEMS() |
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39 | { |
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40 | rtems_time_of_day t; |
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41 | |
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42 | tod[0] |= 0x40; /* Stop read register */ |
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43 | t.year = 1900+getTod(7,0xff); |
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44 | t.month = getTod(6,0x1f); |
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45 | t.day = getTod(5,0x3f); |
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46 | t.hour = getTod(3,0x3f); |
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47 | t.minute = getTod(2,0x7f); |
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48 | t.second = getTod(1,0x7f); |
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49 | t.ticks = 0; |
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50 | tod[0] &= 0x3f; /* Release read register */ |
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51 | |
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52 | rtems_clock_set(&t); |
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53 | } |
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54 | |
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55 | void setRealTimeFromRTEMS() |
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56 | { |
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57 | rtems_time_of_day t; |
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58 | |
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59 | rtems_clock_get(RTEMS_CLOCK_GET_TOD,&t); |
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60 | t.year -= 1900; |
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61 | |
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62 | tod[0] |= 0x80; /* Stop write register */ |
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63 | setTod(7,t.year); |
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64 | setTod(6,t.month); |
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65 | setTod(5,t.day); |
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66 | setTod(4,1); /* I don't know which day of week is */ |
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67 | setTod(3,t.hour); |
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68 | setTod(2,t.minute); |
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69 | setTod(1,t.second); |
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70 | tod[0] &= 0x3f; /* Write these parameters */ |
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71 | } |
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72 | |
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73 | int checkRealTime() |
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74 | { |
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75 | rtems_time_of_day t; |
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76 | int d; |
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77 | |
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78 | tod[0] |= 0x40; /* Stop read register */ |
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79 | rtems_clock_get(RTEMS_CLOCK_GET_TOD,&t); |
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80 | if((t.year != 1900+getTod(7,0xff)) |
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81 | || (t.month != getTod(6,0x1f)) |
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82 | || (t.day != getTod(5,0x3f))) |
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83 | d = 9999; |
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84 | else |
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85 | d = (t.hour-getTod(3,0x3f))*3600 |
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86 | + (t.minute-getTod(3,0x7f))*60 |
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87 | + (t.second - getTod(1,0x7f)); |
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88 | tod[1] &= 0x3f; |
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89 | return d; |
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90 | } |
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