Messages in this thread | | | Date | Tue, 10 Feb 2009 22:28:58 +0100 | Subject | Re: [PATCH] lis3lv02d: add axes knowledge of HP Pavilion dv5 models | From | Giuseppe Bilotta <> |
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On Tue, Feb 10, 2009 at 1:42 PM, Éric Piel <E.A.B.Piel@tudelft.nl> wrote: > Can you try something like this in lis3lv02d_poweron(): > adev.read(handle, CTRL_REG2, &val); > val |= CTRL2_BDU | CTRL2_IEN; > + val &= ~CTRL2_BLE; > adev.write(handle, CTRL_REG2, val);
Ok, this is getting crazier and crazier. Apparently, setting the CTRL2_BLE bit this way makes no difference, and so does setting it with val |= (i.e. enabling it): in both cases, if I debug lis3lv02d_read_16 I always get 0 in the lower byte and something in the upper byte.
By forcefully swapping lo and hi I actually get very little fluctuations in the Y and Z axes (so small that jstest doesn't detect them), but I still get huge (4k) fluctuations in the X axis: apparently, this axis has very small SIGNED fluctuations around the 0, which translate to fluctuations between 255 and 1
Now, the lo/hi thing might be solved some other way (e.g. by checking the BLE bit and relying on its setting instead of trying to force it, and then swapping hi and lo as needed). But how do we solve the SIGNEDNESS of lo ?
-- Giuseppe "Oblomov" Bilotta -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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