USB Forum Discussions

Hello,

     How to get  flag of "CYU3P_GPIF_OP_THR0_READY" in code?

Regards,

lian

Hello,

    When I am using Cypress USB Control Center , sometimes a message box populated saying "Please correct the fireware descriptor table". This messagebox appears before the main window appears. What's the matter?

    Best, Regards.

Hi all,

does anybody know a way how can I change the contents of USB-descriptors after compilation in the .img-binary?

Can I determine the location of the descriptors in the .img-file by some linker-commands or something like that?

Thanks!

Just got the Benicia DVK yesterday and have a big question about PMMC, the reason to use Benicia is because it has build-in eMMC 4.41 host controller, that means I can issue COMMAND to access eMMC instead of read/write only, but from datasheet, PMMC is activate when connecting to a application processor with eMMC host. But if I already had eMMC host on the host AP, why I still need an additional Benicia to access eMMC?? Is it possible: MMC_D0 - MMC_D7/ MMC_CLK / MMC_CMD connect to eMMC device and then use PMMC interface to access eMMC device?

Thank you!

Hi,

I would like to use the FX3 for my upcoming FPGA boards (www.ztex.de).

Unfortunately the informations I found on the Cypress homepage are totally insufficient.

Please, can you provide me with the following information:
* The Technical Reference Manual (at least a preliminary version)
* The SDK package

Regards Stefan

 Hi!

I use streamer to read data from USB bord(3014). if I select 256 packets per xfer the speed can arrive at 320MBps. however after I detect the data I found that I lost some data. but if I select 8 packets or smaller the speed can arrive at 260MBps. but I can receive all the data. 

So I want to ask that why I lost data with the larger number of packets per xfer.

many thanks!

dekui 

 Hello,

I'm trying to use the GPIF for a simple application : interfacing a NAND flash. I designed some state machines :

- writting a command 

- writting an address

- writting data

- receiving data

I created 2 DMA channels (one for transmitting data, the other to receive) agtnd attached them (through socket 0 and 1) to my state machines.

To produce a NAND command, i switch between stat machine to send command, address and write or read data.

When i need to send data, i get a buffer (DMA channel get buffer), fill it and commit it and when i have to read data, i get a buffer and discard it after processing it.

I'm working with DMA buffer up to 8192 bytes (a nand page). All seems work except :

- during the read phases, sometime the FSM is stuck in the start state, waiting for a DMA_RDY_1 condition, like the previous discard didn't work. The getbuffer call returns me a buffer with a count to 0. My current workaround is to discard these '0 count' buffer and trying to get another one.

- the other MAJOR issue is the commit time : in transmission, getting a buffer (8192) + memcpy it + committing it takes 2,5 milli second !!!!! I have the same thing when i'm reading data. During command and address phase, comminting a 1 or 5 bytes buffer takes 60 micro second !

How to fix that ?

 Hello everybody

i am trying to use cyfxbulkstream for debugging. I followed FX3 programmers manual Chapter 12 on setting up the j-link debugger. Now when i try to build the project i get this errors

**** Build of configuration Debug for project USBBulkStreams ****

cs-make all 

'Building target: USBBulkStreams.elf'

'Invoking: ARM Sourcery Windows GCC C Linker'

arm-none-eabi-gcc  ./cyfx_gcc_startup.o ./cyfxbulkdscr.o ./cyfxbulkstreams.o ./cyfxtx.o    -T"C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\firmware\common\fx3.ld" -nostartfiles -Wl,-Map,USBBulkStreams.map -Wl,-d -Wl,--no-wchar-size-warning -Wl,--entry,CyU3PFirmwareEntry "C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\\firmware\u3p_firmware\lib\fx3_debug\cyfxapi.a" "C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\\firmware\u3p_firmware\lib\fx3_debug\cyu3threadx.a"  "C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a" "C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\lib\gcc\arm-none-eabi\4.5.2\libgcc.a" -mcpu=arm926ej-s -mthumb-interwork -g -gdwarf-2 -o"USBBulkStreams.elf"

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-sbrkr.o): In function `_sbrk_r':

sbrkr.c:(.text+0x18): undefined reference to `_sbrk'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-writer.o): In function `_write_r':

writer.c:(.text+0x20): undefined reference to `_write'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-closer.o): In function `_close_r':

closer.c:(.text+0x18): undefined reference to `_close'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-fstatr.o): In function `_fstat_r':

fstatr.c:(.text+0x1c): undefined reference to `_fstat'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-isattyr.o): In function `_isatty_r':

isattyr.c:(.text+0x18): undefined reference to `_isatty'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-lseekr.o): In function `_lseek_r':

lseekr.c:(.text+0x20): undefined reference to `_lseek'

C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.0\arm-none-eabi\lib\libc.a(lib_a-readr.o): In function `_read_r':

readr.c:(.text+0x20): undefined reference to `_read'

collect2: ld returned 1 exit status

cs-make: *** [USBBulkStreams.elf] Error 1

Do you have any idea what is wrong. I am missing something?

Regards