sensor: add driver for HDC1008 temperature and humidity sensor
Add driver for the HDC1008 temperature and relative humidity sensor. Datasheet: http://www.ti.com/lit/ds/symlink/hdc1008.pdf Origin: Original Change-Id: I63cb4cdd94120b80d0d6f3205da073f0817c4f17 Signed-off-by: Bogdan Davidoaia <bogdan.m.davidoaia@intel.com>
This commit is contained in:
Bogdan Davidoaia
Anas Nashif
parent
653874c73f
commit
ef65f155c2
5 changed files with 291 additions and 0 deletions
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@ -46,6 +46,8 @@ config SENSOR_DEBUG
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source "drivers/sensor/Kconfig.bma280"
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source "drivers/sensor/Kconfig.hdc1008"
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source "drivers/sensor/Kconfig.isl29035"
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source "drivers/sensor/Kconfig.mcp9808"
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101
drivers/sensor/Kconfig.hdc1008
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101
drivers/sensor/Kconfig.hdc1008
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@ -0,0 +1,101 @@
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# Kconfig.hdc1008 - HDC1008 temperature and humidity sensor configuration options
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#
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# Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menuconfig HDC1008
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bool
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prompt "HDC1008 Temperature and Humidity Sensor"
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depends on SENSOR && I2C && GPIO
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default n
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help
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Enable driver for HDC1008 temperature and humidity sensors.
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config HDC1008_NAME
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string
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prompt "Driver name"
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default "HDC1008"
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depends on HDC1008
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help
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Device name with which the HDC1008 sensor is identified.
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config HDC1008_INIT_PRIORITY
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int
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prompt "Init priority"
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depends on HDC1008
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default 70
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help
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Device driver initialization priority.
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choice
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prompt "I2C address"
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depends on HDC1008
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default HDC1008_I2C_ADDR_0
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help
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I2C address of the HDC1008 sensor.
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config HDC1008_I2C_ADDR_0
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bool
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prompt "0x40"
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help
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A0 connected GND and A1 connected to GND.
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config HDC1008_I2C_ADDR_1
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bool
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prompt "0x41"
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help
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A0 connected VDD and A1 connected to GND.
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config HDC1008_I2C_ADDR_2
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bool
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prompt "0x42"
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help
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A0 connected GND and A1 connected to VDD.
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config HDC1008_I2C_ADDR_3
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bool
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prompt "0x43"
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help
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A0 connected VDD and A1 connected to VDD.
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endchoice
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config HDC1008_I2C_MASTER_DEV_NAME
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string
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prompt "I2C master where HDC1008 is connected"
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depends on HDC1008
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default "I2C0"
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help
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Specify the device name of the I2C master device to which the
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HDC1008 chip is connected.
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config HDC1008_GPIO_DEV_NAME
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string
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prompt "GPIO device"
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default "GPIO_0"
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depends on HDC1008
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help
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The device name of the GPIO device to which the HDC1008 data-ready
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pin is connected.
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config HDC1008_GPIO_PIN_NUM
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int
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prompt "Interrupt GPIO pin number"
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default 0
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depends on HDC1008
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help
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The number of the GPIO on which the data-ready signal from the HDC1008
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chip will be received.
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@ -4,6 +4,7 @@ obj-$(CONFIG_SENSOR_DELAYED_WORK) += sensor.o
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obj-$(CONFIG_BMA280) += sensor_bma280.o
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obj-$(CONFIG_BMA280_TRIGGER) += sensor_bma280_trigger.o
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obj-$(CONFIG_HDC1008) += sensor_hdc1008.o
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obj-$(CONFIG_ISL29035) += sensor_isl29035.o
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obj-$(CONFIG_ISL29035_TRIGGER) += sensor_isl29035_trigger.o
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obj-$(CONFIG_MCP9808) += sensor_mcp9808.o
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144
drivers/sensor/sensor_hdc1008.c
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144
drivers/sensor/sensor_hdc1008.c
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@ -0,0 +1,144 @@
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <device.h>
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#include <i2c.h>
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#include <gpio.h>
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#include <nanokernel.h>
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#include <sensor.h>
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#include "sensor_hdc1008.h"
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#ifndef CONFIG_SENSOR_DEBUG
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#define DBG(...) { ; }
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#else
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#include <misc/printk.h>
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#define DBG printk
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#endif /* CONFIG_SENSOR_DEBUG */
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static struct hdc1008_data hdc1008_driver;
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static void hdc1008_gpio_callback(struct device *dev, uint32_t pin)
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{
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gpio_pin_disable_callback(dev, pin);
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nano_sem_give(&hdc1008_driver.data_sem);
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}
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static int hdc1008_sample_fetch(struct device *dev)
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{
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struct hdc1008_data *drv_data = dev->driver_data;
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uint8_t buf[4];
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int rc;
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gpio_pin_enable_callback(drv_data->gpio, CONFIG_HDC1008_GPIO_PIN_NUM);
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buf[0] = HDC1008_REG_TEMP;
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rc = i2c_write(drv_data->i2c, buf, 1, HDC1008_I2C_ADDRESS);
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if (rc != DEV_OK) {
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DBG("Failed to write address pointer\n");
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return DEV_FAIL;
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}
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nano_sem_take(&drv_data->data_sem, TICKS_UNLIMITED);
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rc = i2c_read(drv_data->i2c, buf, 4, HDC1008_I2C_ADDRESS);
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if (rc != DEV_OK) {
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DBG("Failed to read sample data\n");
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return DEV_FAIL;
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}
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drv_data->t_sample = (buf[0] << 8) + buf[1];
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drv_data->rh_sample = (buf[2] << 8) + buf[3];
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return DEV_OK;
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}
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static int hdc1008_channel_get(struct device *dev,
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enum sensor_channel chan,
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struct sensor_value *val)
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{
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struct hdc1008_data *drv_data = dev->driver_data;
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uint64_t tmp;
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/*
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* See datasheet "Temperature Register" and "Humidity
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* Register" sections for more details on processing
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* sample data.
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*/
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if (chan == SENSOR_CHAN_TEMP) {
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/* val = -40 + 165 * sample / 2^16 */
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tmp = 165 * (uint64_t)drv_data->t_sample;
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val->type = SENSOR_TYPE_INT_PLUS_MICRO;
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val->val1 = (int32_t)(tmp >> 16) - 40;
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val->val2 = (1000000 * (tmp & 0xFFFF)) >> 16;
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} else if (chan == SENSOR_CHAN_HUMIDITY) {
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/* val = 100000 * sample / 2^16 */
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tmp = 100000 * (uint64_t)drv_data->rh_sample;
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val->type = SENSOR_TYPE_INT_PLUS_MICRO;
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val->val1 = tmp >> 16;
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val->val2 = (1000000 * (tmp & 0xFFFF)) >> 16;
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} else {
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return DEV_INVALID_OP;
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}
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return DEV_OK;
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}
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static struct sensor_driver_api hdc1008_driver_api = {
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.sample_fetch = hdc1008_sample_fetch,
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.channel_get = hdc1008_channel_get,
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};
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int hdc1008_init(struct device *dev)
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{
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struct hdc1008_data *drv_data = dev->driver_data;
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int rc;
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dev->driver_api = &hdc1008_driver_api;
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drv_data->i2c = device_get_binding(CONFIG_HDC1008_I2C_MASTER_DEV_NAME);
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if (drv_data->i2c == NULL) {
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DBG("Failed to get pointer to %s device!\n",
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CONFIG_HDC1008_I2C_MASTER_DEV_NAME);
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return DEV_INVALID_CONF;
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}
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nano_sem_init(&drv_data->data_sem);
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/* setup data ready gpio interrupt */
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drv_data->gpio = device_get_binding(CONFIG_HDC1008_GPIO_DEV_NAME);
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if (drv_data->gpio == NULL) {
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DBG("Failed to get pointer to %s device\n",
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CONFIG_HDC1008_GPIO_DEV_NAME);
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return DEV_INVALID_CONF;
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}
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gpio_pin_configure(drv_data->gpio, CONFIG_HDC1008_GPIO_PIN_NUM,
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GPIO_DIR_IN | GPIO_INT | GPIO_INT_EDGE |
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GPIO_INT_ACTIVE_LOW | GPIO_INT_DEBOUNCE);
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rc = gpio_set_callback(drv_data->gpio, hdc1008_gpio_callback);
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if (rc != DEV_OK) {
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DBG("Failed to set GPIO callback\n");
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return DEV_FAIL;
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}
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return DEV_OK;
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}
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DEVICE_INIT(hdc1008, CONFIG_HDC1008_NAME, hdc1008_init, &hdc1008_driver,
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NULL, SECONDARY, CONFIG_HDC1008_INIT_PRIORITY);
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43
drivers/sensor/sensor_hdc1008.h
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43
drivers/sensor/sensor_hdc1008.h
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@ -0,0 +1,43 @@
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _SENSOR_HDC1008
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#define _SENSOR_HDC1008
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#include <nanokernel.h>
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#if CONFIG_HDC1008_I2C_ADDR_0
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#define HDC1008_I2C_ADDRESS 0x40
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#elif CONFIG_HDC1008_I2C_ADDR_1
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#define HDC1008_I2C_ADDRESS 0x41
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#elif CONFIG_HDC1008_I2C_ADDR_2
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#define HDC1008_I2C_ADDRESS 0x42
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#elif CONFIG_HDC1008_I2C_ADDR_3
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#define HDC1008_I2C_ADDRESS 0x43
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#endif
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#define HDC1008_REG_TEMP 0x0
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#define HDC1008_REG_HUMIDITY 0x1
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struct hdc1008_data {
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struct device *i2c;
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struct device *gpio;
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uint16_t t_sample;
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uint16_t rh_sample;
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struct nano_sem data_sem;
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};
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#endif
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