On Fri, Feb 13, 2009 at 08:47:06AM +0100, Joerg Reisenweber wrote: > Am Fr 13. Februar 2009 schrieb John Lee: > > fso now use AT%N0187 by default. that means Long Echo Cancellation > > (max) plus Noise Reduction (max) > > > > qtopia in 2008.12 uses > > AT%N028B // Long Echo Cancellation: active, -6db > > AT%N0125 // Noise reduction: active, -6db > > > > - John > > err, wouldn't the second command override the settings of the first, thus > effectively disabling any echo cancellation?
028B = 1010001011 0125 = 0100100101 It seems 028B does not trigger SPENH reset, and 0125 does not trigger AEC reset. Of course it will be great if someone can verify it with proper equipment. (copied from framework/subsystems/ogsmd/modems/ti_calypso/channel.py) #=========================================================================# # MMI_AEC_REQ : 0283 = Long AEC, 105 = SPENH, 187 = AEC+SPENH, 1 = STOP # aec_control register bits | 0 0 Sa t2|t1 g3 g2 g1|g0 e2 e1 ak| # bit 0 : ACK bit : set to 1 in order to warn DSP that a new command # is present. # bit 1 : enable AEC # bit 2 : enable SPENH (= Speech Enhancement = noise reduction) # bit 3 : additionnal AEC gain attenuation (lsb) # bit 4 : additionnal AEC gain attenuation (msb) # bit 5 : additionnal SPENH gain attenuation (lsb) # bit 6 : additionnal SPENH gain attenuation (msb) # bit 7 : reset trigger for AEC # bit 8 : reset trigger for SPENH # bit 9 : AEC selector 0 : short AEC, 1 : long AEC # # for Short AEC 0083 # for long AEC 0283 # for long AEC -6 dB 028B # for long AEC -12 dB 0293 # for long AEC -18 dB 029B # for SPENH 0105 # for SPENH -6 dB 0125 # for SPENH -12 dB 0145 # for SPENH -18 dB 0165 # for BOTH 0187 # for STOP ALL 0001 (all bits reset + ACK to 1 to warn the DSP) > Also please be aware this command has to be issued *per call* as it's not > persistent. Yes, it is sent per call, both in 2008.12 and fso milestone 5. - John
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