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[Backport v3.5-branch] drivers: sensor: ams_as5600: Fix calculation of fractional part #70144

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merged 1 commit into from
Mar 18, 2024
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[Backport v3.5-branch] drivers: sensor: ams_as5600: Fix calculation of fractional part #70144

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5 changes: 3 additions & 2 deletions drivers/sensor/ams_as5600/ams_as5600.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ LOG_MODULE_REGISTER(ams_as5600, CONFIG_SENSOR_LOG_LEVEL);
#define AS5600_ANGLE_REGISTER_H 0x0E
#define AS5600_FULL_ANGLE 360
#define AS5600_PULSES_PER_REV 4096
#define AS5600_MILLION_UNIT 1000000

struct as5600_dev_cfg {
struct i2c_dt_spec i2c_port;
Expand Down Expand Up @@ -60,8 +61,8 @@ static int as5600_get(const struct device *dev, enum sensor_channel chan,
val->val1 = ((int32_t)dev_data->position * AS5600_FULL_ANGLE) /
AS5600_PULSES_PER_REV;

val->val2 = ((int32_t)dev_data->position * AS5600_FULL_ANGLE) -
(val->val1 * AS5600_PULSES_PER_REV);
val->val2 = (((int32_t)dev_data->position * AS5600_FULL_ANGLE) %
AS5600_PULSES_PER_REV) * (AS5600_MILLION_UNIT / AS5600_PULSES_PER_REV);
} else {
return -ENOTSUP;
}
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