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feat[i2c]: add bus configuration and max-hz control

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wdfk-prog
2026-03-12 15:15:02 +08:00
committed by Rbb666
parent 4617729c4c
commit b0af22a96f
2 changed files with 55 additions and 9 deletions
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components/drivers/i2c/dev_i2c_core.c
+36 -9
View File
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@@ -7,6 +7,7 @@
* Date Author Notes
* 2012-04-25 weety first version
* 2021-04-20 RiceChen added support for bus control api
* 2024-06-23 wdfk-prog Add max_hz setting
*/
#include <rtdevice.h>
@@ -101,16 +102,42 @@ rt_err_t rt_i2c_control(struct rt_i2c_bus_device *bus,
{
rt_err_t ret;
if(bus->ops->i2c_bus_control)
switch (cmd)
{
ret = bus->ops->i2c_bus_control(bus, cmd, args);
return ret;
}
else
{
LOG_E("I2C bus operation not supported");
return -RT_EINVAL;
case RT_I2C_CTRL_SET_MAX_HZ:
{
if (args == RT_NULL)
{
return -RT_ERROR;
}
rt_uint32_t max_hz = *(rt_uint32_t *)args;
if(max_hz > 0)
{
bus->config.max_hz = max_hz;
}
else
{
return -RT_ERROR;
}
break;
}
default:
{
if(bus->ops->i2c_bus_control)
{
ret = bus->ops->i2c_bus_control(bus, cmd, args);
return ret;
}
else
{
LOG_E("I2C bus operation not supported");
return -RT_EINVAL;
}
break;
}
}
return RT_EOK;
}
rt_ssize_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
components/drivers/include/drivers/dev_i2c.h
+19
View File
@@ -7,6 +7,7 @@
* Date Author Notes
* 2012-04-25 weety first version
* 2021-04-20 RiceChen added support for bus control api
* 2024-06-23 wdfk-prog Add the config struct
*/
#ifndef __DEV_I2C_H__
@@ -185,6 +186,8 @@ extern "C" {
#define RT_I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */
#define RT_I2C_NO_STOP (1u << 7) /*!< do not generate STOP condition */
#define RT_I2C_CTRL_SET_MAX_HZ 0x20
#define RT_I2C_DEV_CTRL_10BIT (RT_DEVICE_CTRL_BASE(I2CBUS) + 0x01)
#define RT_I2C_DEV_CTRL_ADDR (RT_DEVICE_CTRL_BASE(I2CBUS) + 0x02)
#define RT_I2C_DEV_CTRL_TIMEOUT (RT_DEVICE_CTRL_BASE(I2CBUS) + 0x03)
@@ -233,6 +236,21 @@ struct rt_i2c_bus_device_ops
void *args);
};
/**
* I2C configuration structure.
* mode : master: 0x00; slave: 0x01;
* max_hz: Maximum limit baud rate.
* usage_freq: Actual usage baud rate.
*/
struct rt_i2c_configuration
{
rt_uint8_t mode;
rt_uint8_t reserved[3];
rt_uint32_t max_hz;
rt_uint32_t usage_freq;
};
/**
* @brief I2C Bus Device
*/
@@ -244,6 +262,7 @@ struct rt_i2c_bus_device
struct rt_mutex lock;
rt_uint32_t timeout;
rt_uint32_t retries;
struct rt_i2c_configuration config;
void *priv;
};