Hi everybody.
On the OMAP-L137 EVM, I want to use McASP0 in receive mode. All clocks are generated externally. External signals look okay. I'm using PSP drivers v1.20. When I run the program, I get the message: "SIO: create input stream FAILED". Why does this fail? On what does successful creation depend? How can I solve this problem?
I use SPI1 in Master/transmit mode in the same program (works successfully). But could it be that McASP0 doesn't work because:
spiParams.hwiNumber = 8;
and
mcasp0_params.hwiNumber = 8;
??
If yes, what should I put instead?
Could somebody help me please? Thank you very much.
Andreas
Here is what I've done:
#define NUM_BUFS (8)
#define BUFALIGN (128) /* optimal alignment of buffer for L2 cache */
#define BUFLEN (256)
#define BUFSIZE (BUFLEN * sizeof(Ptr))
#define RX_NUM_SERIALIZER (16u)
/* input buffer pointers */
Ptr rxBuffers[NUM_BUFS];
/* inStream is created in main */
static SIO_Handle inStream;
/*
* Mcasp device params. To be filled in userMcaspInit function which
* is called before driver creation
*/
Mcasp_Params mcasp0_params;
/* The McASP configuration required for the wanted burst mode */
Mcasp_HwSetupData mcasp0RcvSetup = {
/* .rmask = */ 0xFFFFFFFF, /* All the data bits are to be used */
/* .rfmt = */ 0x000000F0, /*
/* .afsrctl = */ 0x00000000, /* burst mode,
* Frame sync is one bit
* Rising edge is start of frame
* externally generated frame sync
*/
/* .rtdm = */ 0x00000001, /* slot 1 is active (DSP) */
/* .rintctl = */ 0x00000007, /* sync error,overrun error,clK error */
/* .rstat = */ 0x000001FF, /* reset any existing status bits */
/* .revtctl = */ 0x00000000, /* DMA request is enabled or disabled */
{
/* .aclkrctl = */ 0x00000000, /* ext.clock,falling edge,no div */
/* .ahclkrctl = */ 0x00000000, /* ext.high clock,no div */
/* .rclkchk = */ 0x00000000
},
};
Mcasp_ChanParams mcasp0_chanparam =
{
0x0016, /* number of serializers requested */
{Mcasp_SerializerNum_0,
Mcasp_SerializerNum_1,
Mcasp_SerializerNum_2,
Mcasp_SerializerNum_3,
Mcasp_SerializerNum_4,
Mcasp_SerializerNum_5,
Mcasp_SerializerNum_6,
Mcasp_SerializerNum_7,
Mcasp_SerializerNum_8,
Mcasp_SerializerNum_9,
Mcasp_SerializerNum_10,
Mcasp_SerializerNum_11,
Mcasp_SerializerNum_12,
Mcasp_SerializerNum_13,
Mcasp_SerializerNum_14,
Mcasp_SerializerNum_15,
},
&mcasp0RcvSetup, /* HW setup */
TRUE, /* DMA */
Mcasp_OpMode_TDM, /* channel mode */
Mcasp_WordLength_16, /* output buf size */
NULL, /* pointer to output buffer */
0,
NULL,
NULL,
1, /* number of channels */
Mcasp_BufferFormat_MULTISER_1SLOT_SER_NON_INTERLEAVED,
TRUE,
TRUE
};
/* mcasp2 module LPSC number */
#define PSC_MCASP0_LPSC 7
void userMcaspInit()
{
/* power on the Mcasp 1 instance in the PSC */
Psc_ModuleClkCtrl(Psc_DevId_1, PSC_MCASP0_LPSC, TRUE);
Mcasp_init();
mcasp0_params = Mcasp_PARAMS;
mcasp0_params.hwiNumber = 8;
mcasp0_params.isDataBufferPayloadStructure = FALSE;
// additional settings for external clock?!?
mcasp0_params.mcaspHwSetup.glb.pfunc = 0x0;
mcasp0_params.mcaspHwSetup.glb.pdir = 0x0;
}
Void createStreams()
{
SIO_Attrs sioAttrs;
sioAttrs = SIO_ATTRS;
sioAttrs.nbufs = NUM_BUFS;
sioAttrs.align = BUFALIGN;
sioAttrs.model = SIO_ISSUERECLAIM;
mcasp0_chanparam.edmaHandle = hEdma;
inStream = SIO_create("/dioMcaspIN", SIO_INPUT, BUFSIZE, &sioAttrs);
if (inStream == NULL)
{
LOG_printf(&trace,"\r\nSIO: create input stream FAILED.\n");
return;
}
}
Related DSP/BIOS configuration:
dioMcaspIN: device name = Mcasp0
dioMcaspIN: channel parameters = _mcasp0_chanparam
Mcasp0: init function = _userMcaspInit
Mcasp0: device id = 0x00000000
Mcasp0: device params _mcasp0_params
