4111cfd73c
Add sample code which demostrates the use of the offset register offered in the TMP117. Also add information about tmp117 in README. Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Copyright (c) 2019 Centaur Analytics, Inc
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <device.h>
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#include <drivers/sensor.h>
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#include <sys/printk.h>
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#include <sys/__assert.h>
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void main(void)
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{
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const struct device *dev;
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struct sensor_value temp_value;
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/* offset to be added to the temperature
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* only supported by TMP117
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*/
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struct sensor_value offset_value;
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int ret;
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dev = device_get_binding(DT_LABEL(DT_INST(0, ti_tmp116)));
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__ASSERT(dev != NULL, "Failed to get TMP116 device binding");
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printk("Device %s - %p is ready\n", dev->name, dev);
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/*
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* if an offset of 2.5 oC is to be added,
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* set val1 = 2 and val2 = 500000.
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* See struct sensor_value documentation for more details.
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*/
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offset_value.val1 = 0;
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offset_value.val2 = 0;
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ret = sensor_attr_set(dev, SENSOR_CHAN_AMBIENT_TEMP,
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SENSOR_ATTR_OFFSET, &offset_value);
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if (ret) {
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printk("sensor_attr_set failed ret = %d\n", ret);
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printk("SENSOR_ATTR_OFFSET is only supported by TMP117\n");
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}
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while (1) {
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ret = sensor_sample_fetch(dev);
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if (ret) {
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printk("Failed to fetch measurements (%d)\n", ret);
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return;
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}
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ret = sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP,
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&temp_value);
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if (ret) {
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printk("Failed to get measurements (%d)\n", ret);
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return;
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}
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printk("temp is %d.%d oC\n", temp_value.val1, temp_value.val2);
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k_sleep(K_MSEC(1000));
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}
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}
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