AN61345 loopback problem

	fate posted on 24 Sep 2012 3:37 AM PST Member 5 Forum Posts

The problem is that when transfer 512bytes data(05) using the AN61345 loopback verilog procedure,it will return the 512 bytes data(05) with some 00 in the begining .It shows as the following:

Bulk OUT Transfer
Bulk OUT success.
Buffer Contents
0000 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0010 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0020 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0030 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0040 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0050 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0060 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0070 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0080 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0090 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00A0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00B0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00C0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00D0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00E0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00F0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0100 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0110 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0120 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0130 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0140 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0150 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0160 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0170 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0180 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0190 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01A0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01B0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01C0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01D0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01E0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01F0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 00 00 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0010 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0020 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0030 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0040 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0050 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0060 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0070 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0080 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0090 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00A0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00B0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00C0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00D0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00E0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
00F0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0100 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0110 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0120 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0130 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0140 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0150 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0160 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0170 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0180 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
0190 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01A0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01B0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01C0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01D0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01E0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05
01F0 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05 05

When I want transfer 2bytes data using my own verilog procedure ,the same problem come ,the fist two bytes are also including some 00,but the next 2bytes are correct .I don't know why?

Bulk OUT Transfer
Bulk OUT success.
Buffer Contents
0000 12 10
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 00 00 00 00 00 00 00 00 12 10
Bulk OUT Transfer
Bulk OUT success.
Buffer Contents
0000 15 14
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 15 14
Bulk OUT Transfer
Bulk OUT success.
Buffer Contents
0000 16 17
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 16 17

Re: AN61345 loopback problem

	PRJI posted on 24 Sep 2012 08:17 AM PST Cypress Employee 333 Forum Posts

Hi,

I would like to know the details of your interface. Are you using FX2LP DVK or custom board?

Please let me know the details of your interface.

Thanks

Prajith

Re: AN61345 loopback problem

	fate posted on 24 Sep 2012 09:30 AM PST Member 5 Forum Posts

Hi,I'm using the CyConsloe to test the loopback between FPGA and the cy68013a。I just send data to the EP2 endpoint and loopback to the EP6 endpoint The following is my firmware ,is there something wrong with my firmware

void TD_Init(void)             // Called once at startup
{
   // set the CPU clock to 24MHz
     CPUCS =0x08;
SYNCDELAY;
   // set the slave FIFO interface to 48MHz,SYNC,IFCLK output
     IFCONFIG = 0xE3;
SYNCDELAY;
     REVCTL = 0x03;
SYNCDELAY; // Registers which require a synchronization delay, see section 15.14
// FIFORESET        FIFOPINPOLAR
// INPKTEND         OUTPKTEND
// EPxBCH:L         REVCTL
// GPIFTCB3         GPIFTCB2
// GPIFTCB1         GPIFTCB0
// EPxFIFOPFH:L     EPxAUTOINLENH:L
// EPxFIFOCFG       EPxGPIFFLGSEL
// PINFLAGSxx       EPxFIFOIRQ
// EPxFIFOIE        GPIFIRQ
// GPIFIE           GPIFADRH:L
// UDMACRCH:L       EPxGPIFTRIG
// GPIFTRIG

// Note: The pre-REVE EPxGPIFTCH/L register are affected, as well...
//      ...these have been replaced by GPIFTC[B3:B0] registers

// default: all endpoints have their VALID bit set
// default: TYPE1 = 1 and TYPE0 = 0 --> BULK
// default: EP2 and EP4 DIR bits are 0 (OUT direction)
// default: EP6 and EP8 DIR bits are 1 (IN direction)
// default: EP2, EP4, EP6, and EP8 are double buffered

// we are just using the default values, yes this is not necessary...

   EP1OUTCFG &= 0x7F;   //set invalid
   EP1INCFG &= 0x7F;
   SYNCDELAY;                   // see TRM section 15.14
   EP2CFG = 0xA2;    //set EP2 valid, out, bulk, 512, double buffer.
   SYNCDELAY;
   EP4CFG &= 0x7F;    //set invalid.
   SYNCDELAY;
   EP6CFG = 0xE2;    //set EP6 valid, in, bulk, 512, double buffer.
   SYNCDELAY;
   EP8CFG &= 0x7F;          //set invalid.
   SYNCDELAY;

   FIFORESET = 0x80;             // reset all FIFOs
   SYNCDELAY;
    FIFORESET = 0x02;
    SYNCDELAY;
FIFORESET = 0x04;
    SYNCDELAY;
FIFORESET = 0x06;
    SYNCDELAY;
    FIFORESET = 0x08;
    SYNCDELAY;
    FIFORESET = 0x00;
    SYNCDELAY;
OUTPKTEND=0x82;   //arm EP2 two times
SYNCDELAY;
OUTPKTEND=0x82;
SYNCDELAY;
  EP2FIFOCFG = 0x11; //EP2 autoout=1 wordwide=1;
SYNCDELAY;
EP6FIFOCFG = 0x0D; //EP6 autoin=1 zerolength=1 wordwide=1;
SYNCDELAY;
    PINFLAGSAB = 0xE0; // FLAGB as EP6 full flag,
    SYNCDELAY;
    PINFLAGSCD = 0x08; // FLAGC as EP2 empty flag
    SYNCDELAY;
    PORTACFG = 0x00; // won't generally need FLAGD
    SYNCDELAY;
FIFOPINPOLAR = 0x00; // set all slave FIFO interface pins as active low
    SYNCDELAY;
    EP6AUTOINLENH = 0x02;
    SYNCDELAY;
    EP6AUTOINLENL = 0x00;
    SYNCDELAY;
}

Re: AN61345 loopback problem

	PRJI posted on 26 Sep 2012 02:15 AM PST Cypress Employee 333 Forum Posts

Hi,

Are you getting the same error with slave project which comes with AN61345?

Regards

Prajith

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