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