I have purchased a TMS320C6748 DSP Development Kit (LCDK) and an emulator that working well. LCDKC6748 loopbacks audio from line in to line out well when running mcasp example of C6748_Startware_1_20_03_03.
But LCDKC6748 can't loopback the audio from line in to line out when running audio example of biospsp_03_00_01_00.
I have changed code as follows:
In audio_evmInit.c file, modify the void configureAudio(void) function:
void configureAudio(void)
{
CSL_SyscfgRegsOvly syscfgRegs = (CSL_SyscfgRegsOvly)CSL_SYSCFG_0_REGS;
Uint32 savePinmux0 = 0;
Uint32 savePinmux1 = 0;
Uint32 savePinmux4 = 0;
#ifdef KICK_REG_ENABLE
/*Enable write access to PINMUX and CFG registers in KICK0R and KICK1R */
KICK0_REGISTER = KICK0_ENABLE_KEY;
KICK1_REGISTER = KICK1_ENABLE_KEY;
#endif
savePinmux0 = (syscfgRegs->PINMUX0 &
~(CSL_SYSCFG_PINMUX0_PINMUX0_3_0_MASK |
CSL_SYSCFG_PINMUX0_PINMUX0_7_4_MASK |
CSL_SYSCFG_PINMUX0_PINMUX0_11_8_MASK |
CSL_SYSCFG_PINMUX0_PINMUX0_15_12_MASK|
CSL_SYSCFG_PINMUX0_PINMUX0_19_16_MASK|
CSL_SYSCFG_PINMUX0_PINMUX0_23_20_MASK|
CSL_SYSCFG_PINMUX0_PINMUX0_27_24_MASK|
CSL_SYSCFG_PINMUX0_PINMUX0_31_28_MASK));
//2013.6.3 wuln
#if 0
savePinmux1 = (syscfgRegs->PINMUX1 &
~(CSL_SYSCFG_PINMUX1_PINMUX1_15_12_MASK|
CSL_SYSCFG_PINMUX1_PINMUX1_19_16_MASK));
#else
savePinmux1 = (syscfgRegs->PINMUX1 &
~(CSL_SYSCFG_PINMUX1_PINMUX1_7_4_MASK|
CSL_SYSCFG_PINMUX1_PINMUX1_11_8_MASK));
#endif
//end wuln
savePinmux4 = (syscfgRegs->PINMUX4 &
~(CSL_SYSCFG_PINMUX4_PINMUX4_11_8_MASK |
CSL_SYSCFG_PINMUX4_PINMUX4_15_12_MASK));
/* write to the pinmux registers to enable the mcasp0 and i2c0 */
syscfgRegs->PINMUX0 = (savePinmux0 | 0x01111111);
syscfgRegs->PINMUX1 = (savePinmux1 | 0x00011000);
syscfgRegs->PINMUX4 = (savePinmux4 | 0x00002200);
}
In audioSample_main.c file, modify the void audioUserAic31Init() function:
void audioUserAic31Init()
{
Aic31_init();
audioAic31Params = Aic31_PARAMS;
audioAic31Params.acCtrlBusName = "/i2c0";
//2013.6.3 wuln
audioAic31Params.acSerialDataType = ICodec_DataType_I2S;
//end wuln
}
In audioSample_io.c file, configure rx and tx:
Mcasp_HwSetupData mcaspRcvSetup = {
/* .rmask = */ 0x0000FFFF, /* All the data bits are to be used */
/* .rfmt = */ 0x00018074, /*
* 1 bit delay from framsync
* MSB first
* No extra bit padding
* Padding bit (ignore)
* slot Size is 16
* Reads from DMA port
* Rotate right by 16 bit positions
*/
/* .afsrctl = */ 0x00000110, /* I2S mode,
* Frame sync is one word
* Rising edge is start of frame
* externally generated frame sync
*/
/* .rtdm = */ 0x00000003, /* slot 1 and slot 2 is active (I2S) */
/* .rintctl = */ 0x0000000F, /* sync error, overrun error, clock error and dma error */
/* .rstat = */ 0x000001FF, /* reset any existing status bits */
/* .revtctl = */ 0x00000000, /* DMA request is enabled or disabled */
{
/* .aclkrctl = */0x00000000,
/* .ahclkrctl = */0x00000000,
/* .rclkchk = */0x00000000
}
} ;
Mcasp_HwSetupData mcaspXmtSetup = {
/* .xmask = */ 0x0000FFFF, /* All the data bits are to be used */
/* .xfmt = */ 0x00018074, /*
* 1 bit delay from framsync
* MSB first
* No extra bit padding
* Padding bit (ignore)
* slot Size is 16
* Reads from DMA port
* Rotate right by 16 bit positions
*/
/* .afsxctl = */ 0x00000110, /* I2S mode,
* Frame sync is one word
* Rising edge is start of frame
* externally generated frame sync
*/
/* .xtdm = */ 0x00000003, /* slot 1 and slot 2 is active (DSP) */
/* .xintctl = */ 0x0000000F, /* sync error,overrun error,clK error and dma error*/
/* .xstat = */ 0x000001FF, /* reset any existing status bits */
/* .xevtctl = */ 0x00000000, /* DMA request is enabled or disabled */
{
/* .aclkxctl = */0x00000000,
/* .ahclkxctl = */0x00000000,
/* .xclkchk = */0x00000000
},
};
Mcasp_ChanParams mcasp_chanparam[Audio_NUM_CHANS]=
{
{
0x0001, /* number of serialisers */
{Mcasp_SerializerNum_14, }, /* serialiser index */
&mcaspRcvSetup,
TRUE,
Mcasp_OpMode_TDM, /* Mode (TDM/DIT) */
Mcasp_WordLength_16,
NULL,
0,
NULL,
NULL,
2, /* number of TDM channels */
Mcasp_BufferFormat_1SER_MULTISLOT_NON_INTERLEAVED,
TRUE,
TRUE
},
{
0x0001, /* number of serialisers */
{Mcasp_SerializerNum_13,},
&mcaspXmtSetup,
TRUE,
Mcasp_OpMode_TDM,
Mcasp_WordLength_16, /* word width */
NULL,
0,
NULL,
NULL,
2, /* number of TDM channels */
Mcasp_BufferFormat_1SER_MULTISLOT_NON_INTERLEAVED,
TRUE,
TRUE
}
};
The red above are what I have modified.
After all that modified, LCDKC6748 still can’t loopback line in to line out.
It has puzzled me several days. Please help! Any suggestion is grateful!
