diff options
Diffstat (limited to 'libsensors_iio/src/HWSensorBase.cpp')
| -rw-r--r-- | libsensors_iio/src/HWSensorBase.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libsensors_iio/src/HWSensorBase.cpp b/libsensors_iio/src/HWSensorBase.cpp index 24ed9f2..d029114 100644 --- a/libsensors_iio/src/HWSensorBase.cpp +++ b/libsensors_iio/src/HWSensorBase.cpp @@ -443,7 +443,15 @@ void HWSensorBaseWithPollrate::WriteDataToPipe() if (!GetStatusOfHandle(sensor_t_data.handle)) return; - if (sensor_event.timestamp > (last_data_timestamp + GetDelay())) { + /** Actually, the actual ODR would be slightly bigger than the requested, + * Eg: for lsm6ds3, real ODR is 26, 52, 104..., so the actual ODR is 104Hz + * when 100Hz is requested. + * As a result, the reporting time interval between two adjacent events + * would be smaller than that from GetDelay(). + * To guarantee the requested ODR in all cases, the reporting time interval + * should be greater than GetDelay()/2. + */ + if (sensor_event.timestamp > (last_data_timestamp + GetDelay() / 2)) { err = write(android_pipe_fd, &sensor_event, sizeof(sensor_event)); if (err < 0) { ALOGE("%s: Failed to write sensor data to pipe.", android_name); |