/**************************************************************************//** * * @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 #include #include "sensor_nct7717u.h" #define DBG_ENABLE #define DBG_LEVEL DBG_LOG #define DBG_SECTION_NAME "sensor.nct7717u" #define DBG_COLOR #include #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); }