mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-26 02:16:03 +00:00
ab06ec63f9
Add mutex to lock STM32 I2C bus in order to guarantee that data transfers are atomic and have exclusive access to the bus. Issue has been found fetching data from multiple sensors on I2C bus in a mixed context of thread and triggered interrupt. Signed-off-by: Armando Visconti <armando.visconti@st.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2016 BayLibre, SAS
|
|
* Copyright (c) 2017 Linaro Ltd
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
*/
|
|
|
|
#ifndef ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_
|
|
#define ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_
|
|
|
|
typedef void (*irq_config_func_t)(struct device *port);
|
|
|
|
struct i2c_stm32_config {
|
|
#ifdef CONFIG_I2C_STM32_INTERRUPT
|
|
irq_config_func_t irq_config_func;
|
|
#endif
|
|
struct stm32_pclken pclken;
|
|
I2C_TypeDef *i2c;
|
|
u32_t bitrate;
|
|
};
|
|
|
|
struct i2c_stm32_data {
|
|
#ifdef CONFIG_I2C_STM32_INTERRUPT
|
|
struct k_sem device_sync_sem;
|
|
#endif
|
|
struct k_sem bus_mutex;
|
|
u32_t dev_config;
|
|
#ifdef CONFIG_I2C_STM32_V1
|
|
u16_t slave_address;
|
|
#endif
|
|
struct {
|
|
#ifdef CONFIG_I2C_STM32_V1
|
|
unsigned int is_restart;
|
|
unsigned int flags;
|
|
#endif
|
|
unsigned int is_write;
|
|
unsigned int is_arlo;
|
|
unsigned int is_nack;
|
|
unsigned int is_err;
|
|
struct i2c_msg *msg;
|
|
unsigned int len;
|
|
u8_t *buf;
|
|
} current;
|
|
#ifdef CONFIG_I2C_SLAVE
|
|
bool master_active;
|
|
struct i2c_slave_config *slave_cfg;
|
|
bool slave_attached;
|
|
#endif
|
|
};
|
|
|
|
s32_t stm32_i2c_msg_write(struct device *dev, struct i2c_msg *msg, u8_t *flg,
|
|
u16_t sadr);
|
|
s32_t stm32_i2c_msg_read(struct device *dev, struct i2c_msg *msg, u8_t *flg,
|
|
u16_t sadr);
|
|
s32_t stm32_i2c_configure_timing(struct device *dev, u32_t clk);
|
|
int i2c_stm32_runtime_configure(struct device *dev, u32_t config);
|
|
|
|
void stm32_i2c_event_isr(void *arg);
|
|
void stm32_i2c_error_isr(void *arg);
|
|
#ifdef CONFIG_I2C_STM32_COMBINED_INTERRUPT
|
|
void stm32_i2c_combined_isr(void *arg);
|
|
#endif
|
|
|
|
#ifdef CONFIG_I2C_SLAVE
|
|
int i2c_stm32_slave_register(struct device *dev,
|
|
struct i2c_slave_config *config);
|
|
int i2c_stm32_slave_unregister(struct device *dev,
|
|
struct i2c_slave_config *config);
|
|
#endif
|
|
|
|
#define DEV_DATA(dev) ((struct i2c_stm32_data * const)(dev)->driver_data)
|
|
#define DEV_CFG(dev) \
|
|
((const struct i2c_stm32_config * const)(dev)->config->config_info)
|
|
|
|
#endif /* ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ */
|