cw2015电量计驱动代码
时间: 2023-12-26 18:46:27 浏览: 538
由于不清楚您使用的是哪种类型的cw2015电量计,我只能提供一般性的驱动代码,您需要根据实际情况进行修改。
以下是基于Linux内核的设备驱动代码示例:
```c
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#define CW2015_REG_VOLTAGE 0x00
#define CW2015_REG_CURRENT 0x01
#define CW2015_REG_CAPACITY 0x02
#define CW2015_REG_TEMP 0x03
struct cw2015_data {
struct i2c_client *client;
};
static int cw2015_read_reg(struct cw2015_data *data, u8 reg, u8 *value)
{
int ret;
struct i2c_msg msgs[2];
u8 buf[1];
buf[0] = reg;
msgs[0].addr = data->client->addr;
msgs[0].flags = 0;
msgs[0].len = 1;
msgs[0].buf = buf;
msgs[1].addr = data->client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = 1;
msgs[1].buf = value;
ret = i2c_transfer(data->client->adapter, msgs, 2);
if (ret != 2) {
dev_err(&data->client->dev, "read reg 0x%02x failed\n", reg);
return -EIO;
}
return 0;
}
static int cw2015_get_voltage(struct cw2015_data *data)
{
int ret;
u8 value;
ret = cw2015_read_reg(data, CW2015_REG_VOLTAGE, &value);
if (ret)
return ret;
return value * 10; // 返回电压值,单位是毫伏
}
static int cw2015_get_current(struct cw2015_data *data)
{
int ret;
u8 value;
ret = cw2015_read_reg(data, CW2015_REG_CURRENT, &value);
if (ret)
return ret;
return (char)value * 10; // 返回电流值,单位是毫安
}
static int cw2015_get_capacity(struct cw2015_data *data)
{
int ret;
u8 value;
ret = cw2015_read_reg(data, CW2015_REG_CAPACITY, &value);
if (ret)
return ret;
return value; // 返回电量百分比值,范围是0~100
}
static int cw2015_get_temp(struct cw2015_data *data)
{
int ret;
u8 value;
ret = cw2015_read_reg(data, CW2015_REG_TEMP, &value);
if (ret)
return ret;
return value - 40; // 返回温度值,单位是摄氏度
}
static int cw2015_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct cw2015_data *data;
int ret;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
i2c_set_clientdata(client, data);
// 以下是自定义的初始化操作,根据实际情况进行修改
ret = cw2015_write_reg(data, CW2015_REG_VOLTAGE, 0x00);
if (ret)
return ret;
ret = cw2015_write_reg(data, CW2015_REG_CURRENT, 0x00);
if (ret)
return ret;
ret = cw2015_write_reg(data, CW2015_REG_CAPACITY, 0x00);
if (ret)
return ret;
ret = cw2015_write_reg(data, CW2015_REG_TEMP, 0x00);
if (ret)
return ret;
dev_info(&client->dev, "cw2015 driver probed\n");
return 0;
}
static int cw2015_remove(struct i2c_client *client)
{
dev_info(&client->dev, "cw2015 driver removed\n");
return 0;
}
static const struct i2c_device_id cw2015_id_table[] = {
{ "cw2015", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cw2015_id_table);
static const struct of_device_id cw2015_of_match[] = {
{ .compatible = "cw,cw2015" },
{ }
};
MODULE_DEVICE_TABLE(of, cw2015_of_match);
static struct i2c_driver cw2015_driver = {
.probe = cw2015_probe,
.remove = cw2015_remove,
.id_table = cw2015_id_table,
.driver = {
.name = "cw2015",
.of_match_table = cw2015_of_match,
},
};
module_i2c_driver(cw2015_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("cw2015 driver");
```
该驱动代码通过I2C总线与cw2015电量计进行通信,读取电压、电流、电量百分比和温度值,并提供相应的访问函数。另外,该驱动代码也提供了初始化和卸载函数,您可以根据需要进行修改。
需要注意的是,以上代码仅供参考,具体实现需根据实际情况进行修改。另外,如果您的平台不是基于Linux内核的,那么您需要根据平台的具体情况进行修改,或者重新编写驱动代码。
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