bartoszek/zephyr
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Drivers: max17055: retrieve the current value

Browse Source 
The MAX17055 peripheral allows measuring the current
value (which corresponds to the instantaneous value). Respond to
the `SENSOR_CHAN_CURRENT` command, and retrieve the data
from the `0x0a` device register.

Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
This commit is contained in:
Samuel Tardieu 2025-07-11 18:00:16 +02:00 committed by Anas Nashif
parent 8140680e6b
commit 226011b8e1
2 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/sensor/maxim/max17055/max17055.c
View File

@ -166,6 +166,13 @@ static int max17055_channel_get(const struct device *dev,
valp->val1 = tmp / 1000000;
valp->val2 = tmp % 1000000;
break;
case SENSOR_CHAN_CURRENT: {
int current_ma;
current_ma = current_to_ma(config->rsense_mohms, priv->current);
set_millis(valp, current_ma);
break;
}
case SENSOR_CHAN_GAUGE_AVG_CURRENT: {
int current_ma;
@ -255,6 +262,13 @@ static int max17055_sample_fetch(const struct device *dev,
}
}
if (chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_CURRENT) {
ret = max17055_reg_read(dev, CURRENT, &priv->current);
if (ret < 0) {
return ret;
}
}
if (chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_GAUGE_AVG_CURRENT) {
ret = max17055_reg_read(dev, AVG_CURRENT, &priv->avg_current);
if (ret < 0) {

3
drivers/sensor/maxim/max17055/max17055.h
View File

@ -16,6 +16,7 @@ enum {
REP_SOC = 0x6,
INT_TEMP = 0x8,
VCELL = 0x9,
CURRENT = 0xa,
AVG_CURRENT = 0xb,
FULL_CAP_REP = 0x10,
TTE = 0x11,
@ -49,6 +50,8 @@ struct max17055_data {
uint16_t voltage;
/* Current cell open circuit voltage in units of 1.25/16mV */
uint16_t ocv;
/* Current in units of 1.5625uV / Rsense */
int16_t current;
/* Average current in units of 1.5625uV / Rsense */
int16_t avg_current;
/* Remaining capacity as a %age */