On 2013-03-25 12:52, Dan Carpenter wrote:
On Fri, Mar 22, 2013 at 03:55:51PM -0700, H Hartley Sweeten wrote:
+ /*
+ * Init ptr to DMA buffer that holds new ADC data. We skip the
+ * first uint16_t in the buffer because it contains junk data
+ * from the final ADC of the previous poll list scan.
+ */
+ int32_t *readaddr = (int32_t *)devpriv->ANABuf.LogicalBase + 1;
This was there since the code was merged, but why does it say we're
going to skip the first uint16_t when we actually skip int32_t?
Does anyone know?
I think the 16-bit samples are padded out to 32-bits by the DMA
transfer. The loop following the above line of code converts the 32-bit
DMA'ed samples back to 16-bit samples.
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=-
-=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-
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