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Pegasus Byron- > Thank you for your reply. I checked the archives > yestoday, and indeed, I found the asm file that you > posted. But the source code for the second > communication is the style of hardware, not software. > Do you have the experiences that use software method > to send control data to codec device? For software method to send "secondary communication values to TI codecs, the C54xx asm code below might be of some help. This is for initializing the AC01 codec device on the old-style DSK C54x board. Note that you will need to convert the TDXR, TCR, TCSR, TSPC, etc. registers to their McBSP equivalent locations and values. But the format and sequence of secondary/primary words for the codec will be similar. Jeff Brower DSP sw/hw engineer Signalogic xf = 0 ; reset ac01 tcr = #10h ; stop timer tspc = #0008h ; stop TDM serial port ifr = #080h ; clear flag from IFR tdxr = #0h ; send 0 as first xmit word tcsr = #1 tspc = #00c8h ; reset and start TDM serial port xf = 1 ; release ac01 from reset ; AIC CONFIGURATION TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY A = @FS_MODE A = A << -8 ; A value in upper half of FS_MODE A = A | #0100h TDXR = A ; secondary 1 - Reg A CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY A = @FS_MODE ; get sampling rate setting from host (or other source) A = A & #0FFh ; B value in low half of FS_MODE A = A | #0200h TDXR = A ; secondary 1 - Reg A CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY TDXR = #0300h ; secondary 3 - default CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY TDXR = #0409h ; secondary 4 - Amplifier Gain Select ; TDXR = #040dh ; secondary 4 - Amplifier Gain Select ; Monitor = squelch ; Input = 6 dB ; Output = 0 dB CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY ; TDXR = #0505h ; secondary 5 - Analog Config TDXR = #0501h ; secondary 5 - Analog Config (default) ; HighPass disabled ; IN CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY TDXR = #0600h ; secondary 6 - default CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY TDXR = #0700h ; secondary 7 - default CALL WaitXRDY TDXR = #0003h ; primary - secondary comm coming CALL WaitXRDY TDXR = #0801h ; secondary 8 - default CALL WaitXRDY TDXR = #0 ; return to neutral (operating) state CALL WaitXRDY A = TRCV ; clear out receive buffer TDXR = #0 CALL WaitXRDY A = TRCV RETURN ; wait for xmit buffer to be emptied (output) WaitXRDY: A = TSPC A = A & #0800H IF (AEQ) GOTO WaitXRDY RETURN > --- Jeff Brower <> wrote: > > Pegasus Byron- > > > > Please check the c54x group archives. Some time ago > > I posted asm source to the group > > that shows how to intialize the codec device on the > > DSK C5402 board directly, without > > calling CCS functions. That should give you some > > guidance in working with the AIC10 > > part. > > > > Jeff Brower > > DSP sw/hw engineer > > Signalogic > > > > -------- Original Message -------- > > Subject: about McBSP > > Date: Fri, 14 Jun 2002 00:20:07 -0700 (PDT) > > From: byrpb werwqer <> > > To: > > > > Hi, I know you are an expert about TI'54x and their > > McBSP from the messages you posted. So, I want to > > get > > some help from you. > > I'm doing work with TI'C5402. And the system I'm > > > > developing contains a device named tlv320aic10, > > which > > you must be familar with it. You know, the > > communicaiton between 5402 and the codec is via > > McBSP. > > I've pull down the level of FC pin to ground when I > > designed the board, and I wanted to uses software > > method to finish the second communication between > > DSP > > and the Codec. But I found the control data can't be > > written into the Codec. Does there exist some > > hinders > > or pitfalls? > > Expecting your help. > > Thanks a lot! |
Re: [Fwd: about McBSP] + secondary comm. for TI codecs
Started by ●June 15, 2002
