mirror of
https://github.com/Rockbox/rockbox.git
synced 2026-07-10 13:29:52 -04:00
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2026 Aidan MacDonald
|
|
*
|
|
* 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 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#ifndef __I2C_STM32H743_H__
|
|
#define __I2C_STM32H743_H__
|
|
|
|
#include "mutex.h"
|
|
#include "semaphore.h"
|
|
#include "clock-stm32h7.h"
|
|
|
|
struct stm32_i2c_config
|
|
{
|
|
/* I2C instance address */
|
|
uint32_t instance;
|
|
|
|
/* I2C kernel clock */
|
|
const struct stm32_clock *ker_clock;
|
|
|
|
int bus_freq_hz; /* Desired I2C bus frequency */
|
|
int scl_low_min_ns; /* Minimum SCL low time */
|
|
int scl_high_min_ns; /* Minimum SCL high time */
|
|
int t_vd_dat_max_ns; /* Maximum SDA valid time */
|
|
int t_su_dat_max_ns; /* Minimum SDA setup time */
|
|
int rise_time_max_ns; /* Worst-case rise time for SCL & SDA */
|
|
int fall_time_max_ns; /* Worst-case fall time for SCL & SDA */
|
|
};
|
|
|
|
struct stm32_i2c_controller
|
|
{
|
|
uint32_t regs;
|
|
const struct stm32_clock *ker_clock;
|
|
|
|
struct mutex bus_lock;
|
|
struct semaphore bus_sem;
|
|
|
|
int error;
|
|
|
|
uint8_t *xfer_buf;
|
|
size_t xfer_count;
|
|
|
|
uint8_t reg_addr;
|
|
uint8_t flags;
|
|
};
|
|
|
|
void stm32_i2c_init(struct stm32_i2c_controller *ctl,
|
|
const struct stm32_i2c_config *cfg);
|
|
|
|
int stm32_i2c_read_mem(struct stm32_i2c_controller *ctl,
|
|
uint8_t dev_addr,
|
|
uint8_t reg_addr,
|
|
void *data, size_t nbytes);
|
|
int stm32_i2c_write_mem(struct stm32_i2c_controller *ctl,
|
|
uint8_t dev_addr,
|
|
uint8_t reg_addr,
|
|
const void *data, size_t nbytes);
|
|
|
|
void stm32_i2c_irq_handler(struct stm32_i2c_controller *ctl);
|
|
|
|
#endif /* __I2C_STM32H743_H__ */
|