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Added scale ioctl to LSM303D driver

This commit is contained in:
Julian Oes 2013-07-18 14:42:08 +02:00
parent ad8fc7e61e
commit f5f7b3f6dd
1 changed files with 17 additions and 0 deletions
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17
src/drivers/lsm303d/lsm303d.cpp
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@ -705,6 +705,23 @@ LSM303D::ioctl(struct file *filp, int cmd, unsigned long arg)
else
return -EINVAL;
case ACCELIOCSSCALE:
{
/* copy scale, but only if off by a few percent */
struct accel_scale *s = (struct accel_scale *) arg;
float sum = s->x_scale + s->y_scale + s->z_scale;
if (sum > 2.0f && sum < 4.0f) {
memcpy(&_accel_scale, s, sizeof(_accel_scale));
return OK;
} else {
return -EINVAL;
}
}
case ACCELIOCGSCALE:
/* copy scale out */
memcpy((struct accel_scale *) arg, &_accel_scale, sizeof(_accel_scale));
return OK;
default:
/* give it to the superclass */