Hi, I'd like to ask if anyone knows how to transfer more than 64 kBytes between the Device Controller (in chip ISP1362 placed on my DE2_Board) and the Host controller (my computer). I'm not able to write more then 64 kbytes into the buffer of the OUT endpoint. I access the register of the endpoints in PIO mode. Maybe I have to change the configurations of the 2 endpoints I use, for example to ISOCHRONOUS one (that i don't really know what it is)? I hope I have been clear enough, if anyone would give me even a little suggestion it would be a great help for me! thank you, Paola

You surely didn't mean 64 kB. Actually the maximum packet size for bulk transfer is 64 byte by USB specification. This isn't a speed limitation, cause multiple packets may be transferred during an USB basic time interval of 1 ms, up to the maximum full speed USB capacity. I'm not particular familiar with ISP1362, but as far as I understand the manual and embedded programming guide, you can place multiple packets into a buffer in advance, as usual with other USB controllers. Bulk transfer is the recommended and most effective method for regular data transfer and e. g. used with mass storage device class (MSC). Isochrone transfer is, as the name suggests, for data that must be delivered continously in time, e. g. audio streams.

Hi, thank you for your answer! yes you're right, it's 64 bytes not 64 kBytes and the better mode of transfer is the Bulk transfer. I found that the Device Controller of the ISP1362 is a core based on Philips ISP1181 Device Controller and the ISP1181 has 2-bit address bus. So I realized when I try to write to the endpoint an array with 4 elements (1 element=2 bytes) it's all ok, instead when I try to write to the endpoint an array with more than 4 elements I can read from the USB host (my PC) only the first 4 elements, the left ones are all zero... so that my solution is to implement a FOR loop that write to the endpoint 4 elements per time, but I think there will be a better solution, even if I haven't still any idea about it. Paola

Hi, I'm using the code from DE2_NIOS_DEVICE_LED demonstration and I'm not able to send more than 8 bytes... Here is what I changed In void config_endpoint(void) of MAINLOOP.C: /*port2 is IN*/ Hal4D13_SetEndpointConfig( D13REG_EPCNFG_FIFO_EN| //D13REG_EPCNFG_DBLBUF_EN| D13REG_EPCNFG_IN_EN| D13REG_EPCNFG_NONISOSZ_16, <------- All I want is 16 bytes EPINDEX4EP02 ); Now in my main loop: static unsigned char bbuf[16]; ... Hal4D13_WriteEndpoint(EPINDEX4EP02,&bbuf, 16); And in my program in C#: [DllImport("EasyD12.dll")] private static extern byte ReadPort2(byte[] pData, int iLen); ReadPort2(buff, 16); My fisrt 8 bytes are correct but the 8 others are like copy of the 8 first.. Please help!

Hi! I have the same problem... I believe the problem is the address bus: it is only 2 bit large, so I cannot write more then 8 byte per time... when i try to write more then 8 bytes, the left bytes are all zeros! bye paola

Humm.. I don't know why you tell that... 8 bytes = 64 bits --- Quote Start --- it is only 2 bit large, so I cannot write more then 8 byte per time... --- Quote End --- it's 64 bits not 2 ...

USB Device Controller ISP1362 | Altera Community

21 Replies

Altera_Forum
Honored Contributor
13 years ago
--- Quote Start ---
Hello,

I'm using the wsiausb of Tonyslagle. You search wisiausb.zip in the web and use the code in your DE2 o DE2-70 board.

I am now working in a project which needs to make the DE2-70 board as a USB device and the host is the PC.

When I try to probe the system, I found these problems:

1) If I connect both the blaster cable and the device cable to the pc or only the blaster, the host
shows initially the blaster, then I download the firmware to the FPGA and the system do the Enumeration and initialization
process and the ISP1362 is recognize by the host PC. But, if I disconnect the blaster cable, the system
is not respond, then I reset the driver by the firmware and the device is doesn't show by the host.
I am using the VISA USB Raw of National Instrument and its driver in the host.

2) If I work with both the blaster cable and the device cable connected, the system can transmit data
from PC to device successful, but when I try to send data from device to host PC, it show me a timeout error.
I check the firmware step by step and it apparently work correctly.

Please, if you can probe and solve these problem, you say me..

Thanks...
--- Quote End ---

Hello,

wsiausb project has a lot of shortcumings in its design - mainly the fact that if you compile it, the reported Fmax is lower than required for the desing to operate correctly. The fact that it works even sometimes can be just luck. Also, the state machine, designed part of wsiausb does not meet certain reset timing requirements (according to the Datasheet).

I have used the code in wsiausb as a reference to develop my own project attempts to improve the things mentioned above. You can find it here:

http://mzakharo.github.com/usb-de2-fpga/

Forum Discussion

USB Device Controller ISP1362

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