Hello Community,
I am not very familiar with SYS/BIOS for C674x DSP's so my question might be obvious for experienced users. Anyway a good answer might help others lost in space, as well.
My questions apply to audioSample which is present in examples from BIOSPSP 03.00.01.00 dedicated for EVM6748. The package was fetched from TI as a part of executable package dedicated for LCDK6748 board which I purchased quite recently.
As far as I understand there is no specific port of this example for LCDK6748. So I tailored audioSample for LCDK6748. I run modified example for dedicated on-board codec aic3106 without excessive problems (only mcasp serializers needed to be remapped). It seems to work almost flawlessly except for popcorn noise introduced by XDS510 and continuous communication between DSP target and JTAG interface. I created CCS project with audioSample and ported sources of BIOSPSP to have possibility to recompile library on demand. I created new platform lcdk6748 with full configuration similar to this present for evm6748. Simply I followed C6748 BIOSPSP User Guide 03.00.01.00. to configure environment.
Next step of my exercise was to connect an external audio codec from TLV320AIC34EVM board. It has AIC34 codec which consists in fact two aic33 codecs in single chip - configurable by i2c and two consecutive addresses (0x18/0x19 or 0x1A/0x1B). So I assumed I can use aic31 driver and all related IOM software to drive aic34.
I am able to configure single codec from aic34 chip - it runs as it is expected - without surprise. But I need to drive both codecs in TDM mode, so I modified source and below I present only modified parts of source files that seem to me relevant to the context:
I modified of Aic31Local.h:
#if defined(CHIP_C6748) || defined (CHIP_OMAPL138) #define AIC31_NUM_INSTANCES 2 /**< Num of instances */ #define AIC31_INST0_ADDRESS 0x1A /**< Address of first instance */ #endif
and Aic31.c
Void Aic31_init(Void)
{
Int i;
for (i = 0; i < AIC31_NUM_INSTANCES; i++)
{
/* have to initialize statically */
Aic31_module.inUse[i] = FALSE;
memset((Void *)&Aic31_Instances[i], 0x0, sizeof(Aic31_Object));
Aic31_deviceInstInfo[i].deviceAddress = (Uint32)AIC31_INST0_ADDRESS + i;
}
}
Then I modified audioSample_main.c
void audioUserAic33Init_0()
{
Aic31_init();
audioAic33Params_0 = Aic31_PARAMS;
audioAic33Params_0.acType = ICodec_CodecType_AIC33;
audioAic33Params_0.acCtrlBusName = "/i2c0";
}
void audioUserAic33Init_1()
{
Aic31_init();
audioAic33Params_1 = Aic31_PARAMS;
audioAic33Params_1.acType = ICodec_CodecType_AIC33;
audioAic33Params_1.acCtrlBusName = "/i2c0";
audioAic33Params_1.acOpMode = ICodec_OpMode_SLAVE;
}
/*
* Mcasp init function called when creating the driver.
*/
void audioUserMcaspInit() {
Mcasp_init();
audioMcaspParams = Mcasp_PARAMS;
audioMcaspParams.hwiNumber = 8;
}
/*
* Audio init function called when creating the driver.
*/
void audioUserAudioInit() {
Audio_init();
audioParams = Audio_PARAMS;
audioParams.adDevType = Audio_DeviceType_McASP;
audioParams.adDevName = "/mcasp0";
audioParams.acNumCodecs = 2;
audioParams.acDevName[0] = "/aic34_0";
audioParams.acDevName[1] = "/aic34_1";
}and audioSample_io.c
/* McBsp channel parameters */
Mcasp_ChanParams mcasp_chanparam[Audio_NUM_CHANS]=
{
{
0x0001, /* number of serialisers */
#ifdef TLV320AIC34EVM
{Mcasp_SerializerNum_15, }, /* serialiser index */
//{Mcasp_SerializerNum_7, }, /* serialiser index */
#else
{Mcasp_SerializerNum_14, }, /* serialiser index */
#endif
&mcaspRcvSetup,
TRUE,
Mcasp_OpMode_TDM, /* Mode (TDM/DIT) */
Mcasp_WordLength_32,
NULL,
0,
NULL,
NULL,
2, /* number of TDM channels */
Mcasp_BufferFormat_1SER_MULTISLOT_INTERLEAVED,
TRUE,
TRUE
},
{
0x0001, /* number of serialisers */
#ifdef TLV320AIC34EVM
{Mcasp_SerializerNum_7,},
//{Mcasp_SerializerNum_15,},
#else
{Mcasp_SerializerNum_13,},
#endif
&mcaspXmtSetup,
TRUE,
Mcasp_OpMode_TDM,
Mcasp_WordLength_32, /* word width */
NULL,
0,
NULL,
NULL,
2, /* number of TDM channels */
Mcasp_BufferFormat_1SER_MULTISLOT_INTERLEAVED,
TRUE,
TRUE
}
};
Audio_ChannelConfig audioChanParamsIN =
{
/* channel 0 (RX) */
(Ptr)&mcasp_chanparam[0],
{ /* codec [0] */
{
32000,//44100, /* sampling rate for codec */
50, /* gain (%) for codec */
0x00,
0x00
}
}
};
Audio_ChannelConfig audioChanParamsOUT =
{
/* channel 1 (TX) */
(Ptr)&mcasp_chanparam[1],
{
/* codec [1] */
{
32000, //44100, /* sampling rate */
100, /* gain (%) for codec */
0x00,
0x00
}
}
};In configuration audiosample.cfg I added section for next codec so there is 5 entries calling statically GIO.addDeviceMeta() function (however as I understand this function is deprecated).
var iomFxns = "I2c_IOMFXNS";
var initFxn = "audioUserI2cInit";
var deviceParams = "audioI2cParams";
var deviceId = 0;
GIO.addDeviceMeta("/i2c0", iomFxns, initFxn, deviceId, deviceParams);
var iomFxns = "Aic31_IOMFXNS";
var initFxn = "audioUserAic33Init_0";
var deviceParams = "audioAic33Params_0";
var deviceId = 0;
GIO.addDeviceMeta("/aic34_0", iomFxns, initFxn, deviceId, deviceParams);
var iomFxns = "Aic31_IOMFXNS";
var initFxn = "audioUserAic33Init_1";
var deviceParams = "audioAic33Params_1";
var deviceId = 1;
GIO.addDeviceMeta("/aic34_1", iomFxns, initFxn, deviceId, deviceParams);
var iomFxns = "Mcasp_IOMFXNS";
var initFxn = "audioUserMcaspInit";
var deviceParams = "audioMcaspParams";
var deviceId = 0;
GIO.addDeviceMeta("/mcasp0", iomFxns, initFxn, deviceId, deviceParams);
var iomFxns = "Audio_IOMFXNS";
var initFxn = "audioUserAudioInit";
var deviceParams = "audioParams";
var deviceId = 0;
GIO.addDeviceMeta("/audio0", iomFxns, initFxn, deviceId, deviceParams);
When I run this code I get exception in audioSample_io.c in createStreams()
in line where GIO_create() is called:
inStream = GIO_create("/audio0", GIO_INPUT, &ioParams, &eb);
here is dump:
EDMA driver initialization PASS. A0=0x1 A1=0x0 A2=0x1 A3=0x0 A4=0x0 A5=0x0 A6=0xc00753bc A7=0x0 A8=0xc003e87c A9=0xc002c0cc A10=0xc002c098 A11=0x1 A12=0xc002c098 A13=0x3 A14=0xc003ca2c A15=0x0 A16=0x0 A17=0x0 A18=0xc002c0d8 A19=0x0 A20=0x0 A21=0x0 A22=0x20ff1d2c A23=0x0 A24=0x11633049 A25=0x73f51086 A26=0x6bfd6f9 A27=0xc003e67c A28=0xc0035188 A29=0x0 A30=0xc003e8cc A31=0x0 B0=0x1 B1=0x1 B2=0x7 B3=0xc0050908 B4=0xc003e854 B5=0x0 B6=0xc003ed00 B7=0x0 B8=0xc0066c80 B9=0x0 B10=0xc003c9c4 B11=0xc0075e20 B12=0x0 B13=0xc0067308 B14=0xc007a2c8 B15=0xc003c918 B16=0x0 B17=0xc0075a78 B18=0xa B19=0x78 B20=0x8 B21=0x69 B22=0xffffffff B23=0x0 B24=0x0 B25=0x0 B26=0x554e1bbd B27=0x0 B28=0x2e4 B29=0x14c B30=0xc00787b4 B31=0x0 NTSR=0x1000f ITSR=0xf IRP=0xc0060692 SSR=0x0 AMR=0x0 RILC=0x0 ILC=0x0 Exception at 0x0 EFR=0x2 NRP=0x0 Internal exception: IERR=0x1 Instruction fetch exception ti.sysbios.family.c64p.Exception: line 255: E_exceptionMin: pc = 0x00000000, sp = 0xc003c918. To see more exception detail, use ROV or set 'ti.sysbios.family.c64p.Exception.enablePrint = true;' xdc.runtime.Error.raise: terminating execution
Questions:
1. What is missing in configuration?
2. What else should I modify or add to run and configure both codecs existing at two addresses 0x1A (master) and 0x1B (slave)?
3. How should I configure inStream/outStream to have safe start?
Any help is valuable as I am climbing along "learning curve" and trying to understand the ideas behind IOM drivers.
Regards,
Tomasz Wojtaszek