Kenji Arai / SetRTC

This is a RTC additional function. This is only for Nucleo F401RE & F411RE mbed(Added L152RE, F334R8, L476RG & F746xx). If you connected battery backup circuit for internal RTC, you can make a power-off and reset condition. RTC still has proper time and date.

Dependents:   Nucleo_rtos_sample PB_Emma_Ethernet

Please refer following NOTE information.
/users/kenjiArai/notebook/nucleo-series-rtc-control-under-power-onoff-and-re/

SetRTC.h@0:e4c20fd769f1, 2015-02-07 (annotated)

Committer:
kenjiArai
Date:
Sat Feb 07 02:19:57 2015 +0000
Revision:
0:e4c20fd769f1
Child:
1:3129de8d50ea
Child:
2:765470eab2a6
This is a RTC additional function. This is only for Nucleo F401RE & F411RE mbed. If you connected battery backup circuit for internal RTC, you can make a power-off and reset condition. RTC still has proper time and date.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 0:e4c20fd769f1 1 /*
kenjiArai 0:e4c20fd769f1 2 * mbed Library program
kenjiArai 0:e4c20fd769f1 3 * Check & set RTC function and set proper clock if we can set
kenjiArai 0:e4c20fd769f1 4 * ONLY FOR "Nucleo Board"
kenjiArai 0:e4c20fd769f1 5 *
kenjiArai 0:e4c20fd769f1 6 * Copyright (c) 2014-2015 Kenji Arai / JH1PJL
kenjiArai 0:e4c20fd769f1 7 * http://www.page.sannet.ne.jp/kenjia/index.html
kenjiArai 0:e4c20fd769f1 8 * http://mbed.org/users/kenjiArai/
kenjiArai 0:e4c20fd769f1 9 * Created: October 24th, 2014
kenjiArai 0:e4c20fd769f1 10 * Revised: Feburary 7th, 2015
kenjiArai 0:e4c20fd769f1 11 *
kenjiArai 0:e4c20fd769f1 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
kenjiArai 0:e4c20fd769f1 13 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
kenjiArai 0:e4c20fd769f1 14 * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
kenjiArai 0:e4c20fd769f1 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kenjiArai 0:e4c20fd769f1 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
kenjiArai 0:e4c20fd769f1 17 */
kenjiArai 0:e4c20fd769f1 18
kenjiArai 0:e4c20fd769f1 19 #ifndef SET_RTC_H
kenjiArai 0:e4c20fd769f1 20 #define SET_RTC_H
kenjiArai 0:e4c20fd769f1 21
kenjiArai 0:e4c20fd769f1 22 #include "mbed.h"
kenjiArai 0:e4c20fd769f1 23
kenjiArai 0:e4c20fd769f1 24 #define TIMEOUT ((uint32_t)5000)
kenjiArai 0:e4c20fd769f1 25 #define RTC_DAT0 0x55aa55aa
kenjiArai 0:e4c20fd769f1 26 #define RTC_DAT1 0xaa55aa55
kenjiArai 0:e4c20fd769f1 27
kenjiArai 0:e4c20fd769f1 28 enum {
kenjiArai 0:e4c20fd769f1 29 UNKNOWN = -1,
kenjiArai 0:e4c20fd769f1 30 OK = 0,
kenjiArai 0:e4c20fd769f1 31 NG
kenjiArai 0:e4c20fd769f1 32 };
kenjiArai 0:e4c20fd769f1 33
kenjiArai 0:e4c20fd769f1 34 /** Check and set RTC module inside Nucleo STM32X CPU.
kenjiArai 0:e4c20fd769f1 35 * Latest Nucleo board has external LSE Crystal X2 but no proper setting both HW ans SW.
kenjiArai 0:e4c20fd769f1 36 * In addition, every power on and/or reset make initial condition even HW Backup condition.
kenjiArai 0:e4c20fd769f1 37 * This is cased by mbed initial subroutine problem.
kenjiArai 0:e4c20fd769f1 38 * This program intends to use RTC with X2 and works well with battery back-up hardware setting.
kenjiArai 0:e4c20fd769f1 39 *
kenjiArai 0:e4c20fd769f1 40 * @code
kenjiArai 0:e4c20fd769f1 41 * #include "mbed.h"
kenjiArai 0:e4c20fd769f1 42 * #include "SetRTC.h"
kenjiArai 0:e4c20fd769f1 43 *
kenjiArai 0:e4c20fd769f1 44 * int main() {
kenjiArai 0:e4c20fd769f1 45 * time_t seconds;
kenjiArai 0:e4c20fd769f1 46 *
kenjiArai 0:e4c20fd769f1 47 * CheckRTC();
kenjiArai 0:e4c20fd769f1 48 * printf("Time: %s", ctime(&seconds));
kenjiArai 0:e4c20fd769f1 49 * }
kenjiArai 0:e4c20fd769f1 50 * @endcode
kenjiArai 0:e4c20fd769f1 51 */
kenjiArai 0:e4c20fd769f1 52
kenjiArai 0:e4c20fd769f1 53 /** Check and Set RTC
kenjiArai 0:e4c20fd769f1 54 * @param none
kenjiArai 0:e4c20fd769f1 55 * @return if proper setting = OK, if not = NG and UNKNOWN-> no support this program
kenjiArai 0:e4c20fd769f1 56 */
kenjiArai 0:e4c20fd769f1 57 int32_t SetRTC(void);
kenjiArai 0:e4c20fd769f1 58
kenjiArai 0:e4c20fd769f1 59 void show_RTC_reg( void );
kenjiArai 0:e4c20fd769f1 60
kenjiArai 0:e4c20fd769f1 61 void time_enter_mode(void);
kenjiArai 0:e4c20fd769f1 62
kenjiArai 0:e4c20fd769f1 63 #endif // SET_RTC_H