Hi:
Everyone , I have some trouble for SRC4392 code, pls help me
Now I can config the src4392 , the reading data is the same as the writting ,but the src4392 no audio output. at all. i input the audio form RX4, output form porta, i look for the manual on Ti net ,but no details manual for firmware to be found, How can get start for src4392 firmware?
Hi :
What i said above maybe not very clearly. my purpose as below:
1. the spdif audio is input from RX4 of SRC4392.
2. the Right-justIfied format audio output form port A. output sampling frequencies is 192kHZ
3. All internal clock are use the system clock MCLK(frequency=24.576MHZ)
4. use SPI interface
But the Port A not clock output , that is LRCKA BCKA SDOUTA these pin no signal output, their level are low. the pin RXCKO is still low level , no clock output. What i can do next step?
my configuration as below for you reference
1. for PortA: 24bit right-justfied ,Master mode , SRC output source
for porta ctrl1:
24bit right-justfied ,Master mode , SRC output source
config_data = BIT(AFMT0) | BIT(AFMT1) | BIT(AFMT2) | BIT(AMS) | BIT(AOUTS0) | BIT(AOUTS1)
BIT(AFMT0) denote that set the AFMT0 bit to 1. the other is the same.
2. For porta ctrl2 : use default setting as below
Set LRCKI to 192k
set PORTA master clock source to MCLK
config_data = 0;
3.For portB: 24bit I2S MODE ,Slave mode , input mode, output mute
config_data = BIT(BFMT0) | BIT(BMUTE);
4 RX4 is the default channel, MCLK clock, RXTBD enabled
config_data = BIT(RXMUX1) | BIT(RXMUX0) |BIT(RXCLK);
5 For RXCTL2
RXCKOE enabled
RXCKO CLOCK passthrough,disable divider
receiver auto mute disable
PLL2 out clock free run
config_data = BIT(RXCKOE) | BIT(LOL);
6 For RXPLLCFG1
Set P=2 J=8 D=0;
config_data = BIT(P1) | BIT(J3);
7 For SRCCTL1
SET SRC input source to DIR
Set SRC reference clock source to MCLK
SRC MUTE disabled
SRC out attenuation tracking disabled
config_data = BIT(SRCIS1) ;
8 Finally,config power regster(adress 0x01) to enable desired units.
config_data = BIT(PDSRC) | BIT(PDRX) | BIT(PDPB) | BIT(PDPA);
I have look for the detailed information for firmware on TI .com ,but no important found except the 4392 datasheet. i want to know the steps for making the audio output form PortA. it's better have a document for src4392 firmware.
Pls help
David Chen
