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view Discovery/Inc/externCPU2bootloader.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 f64cf099a7f5
children
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///////////////////////////////////////////////////////////////////////////////
/// -*- coding: UTF-8 -*-
///
/// \file   Discovery/Inc/externCPU2bootloader.h
/// \brief  Header File to communicate with the second CPU in bootloader mode
/// \author heinrichs weikamp gmbh
/// \date   23-Oct-2014
///
/// $Id$
///////////////////////////////////////////////////////////////////////////////
/// \par Copyright (c) 2014-2018 Heinrichs Weikamp gmbh
///
///     This program is free software: you can redistribute it and/or modify
///     it under the terms of the GNU General Public License as published by
///     the Free Software Foundation, either version 3 of the License, or
///     (at your option) any later version.
///
///     This program is distributed in the hope that it will be useful,
///     but WITHOUT ANY WARRANTY; without even the implied warranty of
///     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
///     GNU General Public License for more details.
///
///     You should have received a copy of the GNU General Public License
///     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//////////////////////////////////////////////////////////////////////////////

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef EXTERN_CPU2_BOOTLOADER_H
#define EXTERN_CPU2_BOOTLOADER_H

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

#include "stm32f4xx_hal.h"

/* Exported functions --------------------------------------------------------*/

uint8_t extCPU2bootloader_start(uint8_t *version, uint16_t *chipID);
void extCPU2bootloader_continue(void);
uint8_t extCPU2bootloader( uint8_t* buffer, uint32_t length, char* display_text);

#endif /* EXTERN_CPU2_BOOTLOADER_H */