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drivers: sensor: tmp116: Check that a new value is available

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Add a check to ensure that the conversion is complete before reading

Signed-off-by: Guillaume Lager <g.lager@innoseis.com>
This commit is contained in:
Guillaume Lager 2021-05-26 16:40:28 +02:00 • committed by Kumar Gala
commit 42835a780a
2 changed files with 16 additions and 0 deletions
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14
drivers/sensor/tmp116/tmp116.c
View file

@ -77,6 +77,7 @@ static int tmp116_sample_fetch(const struct device *dev,
{
struct tmp116_data *drv_data = dev->data;
uint16_t value;
uint16_t cfg_reg = 0;
int rc;
__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL ||
@ -85,6 +86,19 @@ static int tmp116_sample_fetch(const struct device *dev,
/* clear sensor values */
drv_data->sample = 0U;
/* Make sure that a data is available */
rc = tmp116_reg_read(dev, TMP116_REG_CFGR, &cfg_reg);
if (rc < 0) {
LOG_ERR("%s, Failed to read from CFGR register",
dev->name);
return rc;
}
if ((cfg_reg & TMP116_CFGR_DATA_READY) == 0) {
LOG_DBG("%s: no data ready", dev->name);
return -EBUSY;
}
/* Get the most recent temperature measurement */
rc = tmp116_reg_read(dev, TMP116_REG_TEMP, &value);
if (rc < 0) {

2
drivers/sensor/tmp116/tmp116.h
View file

@ -25,6 +25,8 @@
#define TMP116_DEVICE_ID 0x1116
#define TMP117_DEVICE_ID 0x0117
#define TMP116_CFGR_DATA_READY BIT(13)
struct tmp116_data {
const struct device *i2c;
uint16_t sample;