21 Jun
2007
21 Jun
'07
5:10 p.m.
Some further looking has uncovered some strange behavior on the record side. When I use
arecord -d5 -fS8 -r8000 -traw test.raw
and then look at the data and clock lines, I see that the pcm is not functioning as designed. aplay works as advertised.
The frame sync line is at ground before the record, during the record it cycles between 3.3 and 2.8 V with a rough square pattern at the bitclock rate of 256k. Not sure if this is hw or sw...will continue to invesigate.
Paul
*************************************** Paul David Kavan Project Engineer GRH Electronics, Inc. 402-734-4900 pkavan@gmail.com ***************************************