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/**************************************************************************//**
*
* @copyright (C) 2019 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-9-1 Wayne First version
*
******************************************************************************/
#include <rtthread.h>
#include <sys/time.h>
#include "sensor_nct7717u.h"
#define DBG_ENABLE
#define DBG_LEVEL DBG_LOG
#define DBG_SECTION_NAME "sensor.nct7717u"
#define DBG_COLOR
#include <rtdbg.h>
#define NCT7717U_I2C_SLAVE_ADDR 0x48
#define REG_NCT7717U_LDT 0x0
#define REG_NCT7717U_ALERT_STATUS 0x2
#define REG_NCT7717U_CONFIGURATION_R 0x3
#define REG_NCT7717U_CONVERSION_RATE_R 0x4
#define REG_NCT7717U_LH_HAT_R 0x5
#define REG_NCT7717U_CONFIGURATION_W 0x9
#define REG_NCT7717U_CONVERSION_RATE_W 0xA
#define REG_NCT7717U_LH_HAT_W 0xB
#define REG_NCT7717U_ONESHOT_CONVERSION 0xF
#define REG_NCT7717U_CUSTOMER_LOG_1 0x2D
#define REG_NCT7717U_CUSTOMER_LOG_2 0x2E
#define REG_NCT7717U_CUSTOMER_LOG_3 0x2F
#define REG_NCT7717U_ALERT_MODE 0xBF
#define REG_NCT7717U_CID 0xFD
#define REG_NCT7717U_VID 0xFE
#define REG_NCT7717U_DID 0xFF
static rt_err_t nct7717u_i2c_read_reg(struct rt_i2c_bus_device *i2c_bus_dev, const char *reg, int reg_length, char *data, int length)
{
struct rt_i2c_msg msgs[2];
msgs[0].addr = NCT7717U_I2C_SLAVE_ADDR; /* Slave address */
msgs[0].flags = RT_I2C_WR; /* Write flag */
msgs[0].buf = (rt_uint8_t *)reg; /* Slave register address */
msgs[0].len = reg_length; /* Number of bytes sent */
msgs[1].addr = NCT7717U_I2C_SLAVE_ADDR; /* Slave address */
msgs[1].flags = RT_I2C_RD; /* Read flag without READ_ACK */
msgs[1].buf = (rt_uint8_t *)data; /* Read data pointer */
msgs[1].len = length; /* Number of bytes read */
if (rt_i2c_transfer(i2c_bus_dev, &msgs[0], 2) != 2)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t nct7717u_read_cid(struct rt_i2c_bus_device *i2c_bus_dev, uint8_t *u8Temp)
{
uint8_t u8Reg = REG_NCT7717U_CID;
return nct7717u_i2c_read_reg(i2c_bus_dev, (const char *)&u8Reg, sizeof(u8Reg), (char *)u8Temp, sizeof(uint8_t));
}
static rt_err_t nct7717u_read_vid(struct rt_i2c_bus_device *i2c_bus_dev, uint8_t *u8Temp)
{
uint8_t u8Reg = REG_NCT7717U_VID;
return nct7717u_i2c_read_reg(i2c_bus_dev, (const char *)&u8Reg, sizeof(u8Reg), (char *)u8Temp, sizeof(uint8_t));
}
static rt_err_t nct7717u_read_did(struct rt_i2c_bus_device *i2c_bus_dev, uint8_t *u8Temp)
{
uint8_t u8Reg = REG_NCT7717U_DID;
return nct7717u_i2c_read_reg(i2c_bus_dev, (const char *)&u8Reg, sizeof(u8Reg), (char *)u8Temp, sizeof(uint8_t));
}
static rt_err_t nct7717u_probe(struct rt_i2c_bus_device *i2c_bus_dev)
{
uint8_t u8Cid, u8Vid, u8Did;
if (nct7717u_read_cid(i2c_bus_dev, &u8Cid) != RT_EOK)
goto exit_nct7717u_probe;
if (nct7717u_read_vid(i2c_bus_dev, &u8Vid) != RT_EOK)
goto exit_nct7717u_probe;
if (nct7717u_read_did(i2c_bus_dev, &u8Did) != RT_EOK)
goto exit_nct7717u_probe;
LOG_I("CID=%02x VID=%02x DID=%02x", u8Cid, u8Vid, u8Did);
if ((u8Cid != 0x50) || (u8Vid != 0x50) || ((u8Did & 0x90) != 0x90))
{
LOG_E("Failed to detect NCT7717U");
goto exit_nct7717u_probe;
}
return RT_EOK;
exit_nct7717u_probe:
return -RT_ERROR;
}
static rt_err_t nct7717u_ldt_readout(struct rt_i2c_bus_device *i2c_bus_dev, uint8_t *u8Temp)
{
uint8_t u8Reg = REG_NCT7717U_LDT;
return nct7717u_i2c_read_reg(i2c_bus_dev, (const char *)&u8Reg, sizeof(u8Reg), (char *)u8Temp, sizeof(uint8_t));
}
static rt_ssize_t nct7717u_fetch_data(rt_sensor_t sensor, rt_sensor_data_t data, rt_size_t len)
{
RT_ASSERT(data);
if (sensor->info.type == RT_SENSOR_TYPE_TEMP)
{
rt_int8_t i8Temp;
struct rt_i2c_bus_device *i2c_bus_dev = sensor->config.intf.arg;
if (nct7717u_ldt_readout(i2c_bus_dev, (uint8_t *)&i8Temp) == RT_EOK)
{
rt_int32_t i32TempValue = i8Temp;
data->type = RT_SENSOR_TYPE_TEMP;
data->data.temp = i32TempValue * 10;
data->timestamp = rt_sensor_get_ts();
return 1;
}
}
return 0;
}
static rt_err_t nct7717u_control(struct rt_sensor_device *sensor, int cmd, void *args)
{
switch (cmd)
{
case RT_SENSOR_CTRL_GET_ID:
{
struct rt_i2c_bus_device *i2c_bus_dev = sensor->config.intf.arg;
uint8_t u8Did;
RT_ASSERT(args);
nct7717u_read_did(i2c_bus_dev, &u8Did);
*((uint8_t *)args) = u8Did;
}
break;
default:
return -RT_ERROR;
}
return RT_EOK;
}
static struct rt_sensor_ops sensor_ops =
{
nct7717u_fetch_data,
nct7717u_control
};
int rt_hw_nct7717u_temp_init(const char *name, struct rt_sensor_config *cfg)
{
rt_int8_t result;
rt_sensor_t sensor = RT_NULL;
sensor = rt_calloc(1, sizeof(struct rt_sensor_device));
if (sensor == RT_NULL)
return -(RT_ENOMEM);
sensor->info.type = RT_SENSOR_TYPE_TEMP;
sensor->info.vendor = RT_SENSOR_VENDOR_UNKNOWN;
sensor->info.name = "nct7717u_temp";
sensor->info.unit = RT_SENSOR_UNIT_CELSIUS;
sensor->info.intf_type = RT_SENSOR_INTF_I2C;
sensor->info.scale.range_max = 127;
sensor->info.scale.range_min = -128;
sensor->info.acquire_min = 100; //100ms
rt_memcpy(&sensor->config, cfg, sizeof(struct rt_sensor_config));
sensor->ops = &sensor_ops;
result = rt_hw_sensor_register(sensor, name, RT_DEVICE_FLAG_RDWR, RT_NULL);
if (result != RT_EOK)
{
LOG_E("device register: %d", result);
rt_free(sensor);
return -RT_ERROR;
}
return RT_EOK;
}
int rt_hw_nct7717u_init(const char *name, struct rt_sensor_config *cfg)
{
struct rt_sensor_intf *intf;
struct rt_i2c_bus_device *i2c_bus_dev;
RT_ASSERT(name != NULL);
RT_ASSERT(cfg != NULL);
intf = &cfg->intf;
/* Find I2C bus */
i2c_bus_dev = (struct rt_i2c_bus_device *)rt_device_find(intf->dev_name);
if (i2c_bus_dev == RT_NULL)
{
goto exit_rt_hw_nct7717u_init;
}
intf->arg = i2c_bus_dev;
if (nct7717u_probe(i2c_bus_dev) != RT_EOK)
goto exit_rt_hw_nct7717u_init;
return rt_hw_nct7717u_temp_init(name, cfg);
exit_rt_hw_nct7717u_init:
return -(RT_ERROR);
}
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