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49d96d95ab
The MCP9808 supports threshold triggering. Add support for this feature in the driver and the sample application. If triggering is activated, the driver can create its own fiber or use the system-wide sensor fiber. Origin: Original Change-Id: Ie825a22245cb48cbdffba3049011e4d305975d53 Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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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_MCP9808_H__
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#define __SENSOR_MCP9808_H__
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#include <stdint.h>
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#include <device.h>
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#include <sensor.h>
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#include <misc/util.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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#define MCP9808_REG_CONFIG 0x01
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#define MCP9808_REG_UPPER_LIMIT 0x02
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#define MCP9808_REG_LOWER_LIMIT 0x03
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#define MCP9808_REG_CRITICAL 0x04
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#define MCP9808_REG_TEMP_AMB 0x05
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#define MCP9808_ALERT_INT BIT(0)
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#define MCP9808_ALERT_CNT BIT(3)
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#define MCP9808_INT_CLEAR BIT(5)
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#define MCP9808_SIGN_BIT BIT(12)
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#define MCP9808_TEMP_INT_MASK 0x0ff0
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#define MCP9808_TEMP_INT_SHIFT 4
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#define MCP9808_TEMP_FRAC_MASK 0x000f
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#define MCP9808_TEMP_MAX 0xffc
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struct mcp9808_data {
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struct device *i2c_master;
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uint16_t i2c_slave_addr;
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uint16_t reg_val;
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#ifdef CONFIG_MCP9808_TRIGGER_OWN_FIBER
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struct nano_sem sem;
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#endif
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#ifdef CONFIG_MCP9808_TRIGGER_GLOBAL_FIBER
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struct sensor_work work;
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#endif
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#ifdef CONFIG_MCP9808_TRIGGER
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struct sensor_trigger trig;
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sensor_trigger_handler_t trigger_handler;
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#endif
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};
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int mcp9808_reg_read(struct mcp9808_data *data, uint8_t reg, uint16_t *val);
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#ifdef CONFIG_MCP9808_TRIGGER
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int mcp9808_attr_set(struct device *dev, enum sensor_channel chan,
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enum sensor_attribute attr,
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const struct sensor_value *val);
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int mcp9808_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler);
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void mcp9808_setup_interrupt(struct device *dev);
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#else
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static inline int mcp9808_attr_set(struct device *dev,
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enum sensor_channel chan,
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enum sensor_attribute attr,
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const struct sensor_value *val)
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{
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return DEV_INVALID_OP;
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}
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static inline int mcp9808_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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return DEV_INVALID_OP;
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}
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static void mcp9808_setup_interrupt(struct device *dev)
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{
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}
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#endif /* CONFIG_MCP9808_TRIGGER */
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#endif /* __SENSOR_MCP9808_H__ */
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