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view Small_CPU/Inc/rtc.h @ 328:4fe5400567e7 I2C_Improvment

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Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery The errata describes a possible problem in operation between 88kHz and 100kHz => Set speed as recommended as work around. Based on reference implementation only one filter should be use. Choice was digital because only drawback is lag of wakeup functionality which is not used I2C communication may be randomly interrupted e.g. by a RTE reset or firmware update => reworked recovery function to get I2C devices in idle state again (Clk and SDA HIGH)
author ideenmodellierer
date Wed, 17 Jul 2019 22:42:15 +0200
parents 5f11787b4f42
children
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/**
  ******************************************************************************
  * @file    rtc.h
  * @author  heinrichs weikamp gmbh
  * @version V0.0.1
  * @date    10-Oct-2014
  * @brief   header file for rtc control
  *           
  @verbatim                 
  ============================================================================== 
                        ##### How to use #####
  ============================================================================== 
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */ 

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef RTC_H
#define RTC_H

#ifdef __cplusplus
 extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/

#define RTC_ASYNCH_PREDIV  0x7F   /* LSE as RTC clock */
#define RTC_SYNCH_PREDIV   0x00FF /* LSE as RTC clock */

#include "stm32f4xx_hal.h"
	 
void MX_RTC_init(void);
void RTC_StopMode_2seconds(void);
void RTC_Stop_11ms(void);
void RTC_SetTime(RTC_TimeTypeDef stimestructure);
void RTC_SetDate(RTC_DateTypeDef sdatestructure);

#ifdef __cplusplus
}
#endif

#endif /* RTC_H */

/************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/