1 | /* mbed Microcontroller Library
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2 | * Copyright (c) 2006-2013 ARM Limited
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 |
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17 | #include <time.h>
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18 |
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19 | #ifdef __cplusplus
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20 | extern "C" {
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21 | #endif
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22 |
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23 | /** Implementation of the C time.h functions
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24 | *
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25 | * Provides mechanisms to set and read the current time, based
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26 | * on the microcontroller Real-Time Clock (RTC), plus some
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27 | * standard C manipulation and formating functions.
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28 | *
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29 | * Example:
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30 | * @code
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31 | * #include "mbed.h"
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32 | *
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33 | * int main() {
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34 | * set_time(1256729737); // Set RTC time to Wed, 28 Oct 2009 11:35:37
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35 | *
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36 | * while(1) {
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37 | * time_t seconds = time(NULL);
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38 | *
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39 | * printf("Time as seconds since January 1, 1970 = %d\n", seconds);
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40 | *
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41 | * printf("Time as a basic string = %s", ctime(&seconds));
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42 | *
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43 | * char buffer[32];
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44 | * strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
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45 | * printf("Time as a custom formatted string = %s", buffer);
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46 | *
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47 | * wait(1);
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48 | * }
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49 | * }
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50 | * @endcode
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51 | */
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52 |
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53 | /** Set the current time
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54 | *
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55 | * Initialises and sets the time of the microcontroller Real-Time Clock (RTC)
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56 | * to the time represented by the number of seconds since January 1, 1970
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57 | * (the UNIX timestamp).
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58 | *
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59 | * @param t Number of seconds since January 1, 1970 (the UNIX timestamp)
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60 | *
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61 | * Example:
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62 | * @code
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63 | * #include "mbed.h"
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64 | *
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65 | * int main() {
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66 | * set_time(1256729737); // Set time to Wed, 28 Oct 2009 11:35:37
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67 | * }
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68 | * @endcode
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69 | */
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70 | void set_time(time_t t);
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71 |
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72 | /** Attach an external RTC to be used for the C time functions
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73 | *
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74 | * Do not call this function from an interrupt while an RTC read/write operation may be occurring
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75 | *
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76 | * @param read_rtc pointer to function which returns current UNIX timestamp
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77 | * @param write_rtc pointer to function which sets current UNIX timestamp, can be NULL
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78 | * @param init_rtc pointer to funtion which initializes RTC, can be NULL
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79 | * @param isenabled_rtc pointer to function wich returns if the rtc is enabled, can be NULL
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80 | */
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81 | void attach_rtc(time_t (*read_rtc)(void), void (*write_rtc)(time_t), void (*init_rtc)(void), int (*isenabled_rtc)(void));
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82 |
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83 | #ifdef __cplusplus
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84 | }
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85 | #endif
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