Difference between revisions of "Lcsoft Mini Board/Info"

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(Created page with "== lsusb before firmware upload == This is the lsusb ouput on Linux, '''before''' any FX2 firmware is uploaded: <small> $ '''lsusb -vvv''' Bus 001 Device 011: ID '''0925:3...")
 
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(4 intermediate revisions by 3 users not shown)
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== lsusb before firmware upload ==
== lsusb before firmware upload (without jumper) ==


This is the lsusb ouput on Linux, '''before''' any FX2 firmware is uploaded:
This is the lsusb ouput on Linux, '''before''' any FX2 firmware is uploaded:


<small>
<small>
  $ '''lsusb -vvv'''
  $ '''lsusb -v'''
Bus 001 Device 013: ID '''04b4:8613 Cypress Semiconductor Corp. CY7C68013 EZ-USB FX2 USB 2.0 Development Kit'''
Device Descriptor:
  bLength                18
  bDescriptorType        1
  bcdUSB              2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass      255 Vendor Specific Subclass
  bDeviceProtocol      255 Vendor Specific Protocol
  bMaxPacketSize0        64
  idVendor          0x04b4 '''Cypress Semiconductor Corp.'''
  idProduct          0x8613 '''CY7C68013 EZ-USB FX2 USB 2.0 Development Kit'''
  bcdDevice            0.04
  iManufacturer          0
  iProduct                0
  iSerial                0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                9
    bDescriptorType        2
    wTotalLength          171
    bNumInterfaces          1
    bConfigurationValue    1
    iConfiguration          0
    bmAttributes        0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      0
      bNumEndpoints          0
      bInterfaceClass      255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      1
      bNumEndpoints          6
      bInterfaceClass      255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      2
      bNumEndpoints          6
      bInterfaceClass      255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0040  1x 64 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0040  1x 64 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x86  EP 6 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
    Interface Descriptor:
      bLength                9
      bDescriptorType        4
      bInterfaceNumber        0
      bAlternateSetting      3
      bNumEndpoints          6
      bInterfaceClass      255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0040  1x 64 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0040  1x 64 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x02  EP 2 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x86  EP 6 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              1
      Endpoint Descriptor:
        bLength                7
        bDescriptorType        5
        bEndpointAddress    0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type              None
          Usage Type              Data
        wMaxPacketSize    0x0200  1x 512 bytes
        bInterval              0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType        6
  bcdUSB              2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass      255 Vendor Specific Subclass
  bDeviceProtocol      255 Vendor Specific Protocol
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:    0x0000
  (Bus Powered)
</small>
 
== lsusb before firmware upload (with jumper) ==
 
This is the lsusb ouput on Linux, '''before''' any FX2 firmware is uploaded:
 
<small>
$ '''lsusb -v'''
  Bus 001 Device 011: ID '''0925:3881 Lakeview Research'''
  Bus 001 Device 011: ID '''0925:3881 Lakeview Research'''
  Device Descriptor:
  Device Descriptor:
Line 263: Line 528:
   (Bus Powered)
   (Bus Powered)
</small>
</small>
== Flashing fx2lafw to the EEPROM ==
It is possible to flash fx2lafw directly to the EEPROM on the board. Flashing a firmware to RAM and renumerating takes about two seconds. If fx2lafw boots from the EEPROM, this step is no longer necessary.
=== Prerequisites ===
* Linux environment
* [http://sourceforge.net/projects/linux-hotplug/files/fxload/2008_10_13/ fxload]: your distribution may already package this. These instructions assume that you have fxload running.
* [http://www.triplespark.net/elec/periph/USB-FX2/eeprom/fxload-full-2008_10_13-ww3.tar.gz Second stage bootloader, Vend_Ax.hex]
* sigrok-firmware-fx2lafw sources.
=== Building the firmware ===
To flash the firmware, you will need a hex file containing the firmware, fx2lafw-cypress-fx2.ihx. Since the hex file is a byproduct of the build, you will need to build the firmware from sigrok-firmware-fx2lafw sources.
1) Build and install fx2lafw. See [[fx2lafw#Build_fx2lafw]] for details.
=== Testing the firmware ===
2) Ensure you can access the USB device. One method is to run the following commands as root. A more elegant method is to use udev. See [[fx2lafw#Install_the_udev_rules_file]] for details.
3) Disconnect the EEPROM jumper. The chip will boot from its default bootloader.
4) Connect the board to the computer, and run a simple sigrok-cli test.
$ '''sigrok-cli --driver fx2lafw --output-format bits --loglevel 5 --samples 8'''
* If you see a "fx2lafw: Device came back after [some] ms." the firmware works, and you can proceed.
* If however, you get a "fx2lafw: Device failed to renumerate." error, STOP. The firmware will not work.
=== Flashing the firmware ===
5) Disconnect the board from the PC, and connect the EEPROM jumper. The board needs to boot from the EEPROM, otherwise fxload will not be able to write to the EEPROM.
6) Look at '''lsusb''' for the bus and device address.
$ lsusb
[...]
Bus 009 Device 078: ID 0925:3881 Lakeview Research
[...]
In this case, the bus is '''009''' and device is '''078'''. You will need this information later.
7) Copy the hex file to your working directory. You will find it in '''sigrok-firmware-fx2lafw/hw/cypress-fx2/fx2lafw-cypress-fx2.ihx'''.
8) Copy the second stage bootloader downloaded earlier, in the working directory. The file is named '''Vend_Ax.hex'''.
9) Invoke fxload:
fxload must be passed the USB device path via the -D parameter. This is usually:
/dev/bus/usb/'''[bus]'''/'''[device]'''
or
/proc/bus/usb/'''[bus]'''/'''[device]'''
* The '''-I''' parameter specifies the hex file to be flashed, in our case fx2lafw-cypress-fx2.ihx.
* '''-s''' specifies the second stage bootloader. This is the program that gets loaded into FX2's RAM and handles the EEPROM flashing process.
* '''-t''' specifies the chip type. It will either be fx2 or fx2lp. In this case, I was using the fx2 (not fx2lp).
Invoke fxload. In my case, I needed to invoke as such:
$ '''fxload -D /dev/bus/usb/009/078 -I fx2lafw-cypress-fx2.ihx -c 0x01 -s Vend_Ax.hex -t fx2'''
10) Done. Now you can disconnect the board from the computer. Leave the EEPROM jumper connected. The next time you connect the board, it will boot fx2lafw directly, and sigrok will not need to upload the firmware every time it runs.
__FORCETOC__

Latest revision as of 23:23, 7 December 2014

lsusb before firmware upload (without jumper)

This is the lsusb ouput on Linux, before any FX2 firmware is uploaded: 

$ lsusb -v
Bus 001 Device 013: ID 04b4:8613 Cypress Semiconductor Corp. CY7C68013 EZ-USB FX2 USB 2.0 Development Kit
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  idVendor           0x04b4 Cypress Semiconductor Corp.
  idProduct          0x8613 CY7C68013 EZ-USB FX2 USB 2.0 Development Kit
  bcdDevice            0.04
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          171
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       2
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       3
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

lsusb before firmware upload (with jumper)

This is the lsusb ouput on Linux, before any FX2 firmware is uploaded: 

$ lsusb -v
Bus 001 Device 011: ID 0925:3881 Lakeview Research
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  idVendor           0x0925 Lakeview Research
  idProduct          0x3881 
  bcdDevice            0.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          171
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       2
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       3
      bNumEndpoints           6
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

Flashing fx2lafw to the EEPROM

It is possible to flash fx2lafw directly to the EEPROM on the board. Flashing a firmware to RAM and renumerating takes about two seconds. If fx2lafw boots from the EEPROM, this step is no longer necessary.

Prerequisites

Building the firmware

To flash the firmware, you will need a hex file containing the firmware, fx2lafw-cypress-fx2.ihx. Since the hex file is a byproduct of the build, you will need to build the firmware from sigrok-firmware-fx2lafw sources.

1) Build and install fx2lafw. See fx2lafw#Build_fx2lafw for details.

Testing the firmware

2) Ensure you can access the USB device. One method is to run the following commands as root. A more elegant method is to use udev. See fx2lafw#Install_the_udev_rules_file for details.

3) Disconnect the EEPROM jumper. The chip will boot from its default bootloader.

4) Connect the board to the computer, and run a simple sigrok-cli test. 

$ sigrok-cli --driver fx2lafw --output-format bits --loglevel 5 --samples 8
  • If you see a "fx2lafw: Device came back after [some] ms." the firmware works, and you can proceed.
  • If however, you get a "fx2lafw: Device failed to renumerate." error, STOP. The firmware will not work.

Flashing the firmware

5) Disconnect the board from the PC, and connect the EEPROM jumper. The board needs to boot from the EEPROM, otherwise fxload will not be able to write to the EEPROM.

6) Look at lsusb for the bus and device address. 

$ lsusb
[...]
Bus 009 Device 078: ID 0925:3881 Lakeview Research
[...]

In this case, the bus is 009 and device is 078. You will need this information later.

7) Copy the hex file to your working directory. You will find it in sigrok-firmware-fx2lafw/hw/cypress-fx2/fx2lafw-cypress-fx2.ihx.

8) Copy the second stage bootloader downloaded earlier, in the working directory. The file is named Vend_Ax.hex.

9) Invoke fxload:

fxload must be passed the USB device path via the -D parameter. This is usually: 

/dev/bus/usb/[bus]/[device]

or 

/proc/bus/usb/[bus]/[device]
  • The -I parameter specifies the hex file to be flashed, in our case fx2lafw-cypress-fx2.ihx.
  • -s specifies the second stage bootloader. This is the program that gets loaded into FX2's RAM and handles the EEPROM flashing process.
  • -t specifies the chip type. It will either be fx2 or fx2lp. In this case, I was using the fx2 (not fx2lp).

Invoke fxload. In my case, I needed to invoke as such: 

$ fxload -D /dev/bus/usb/009/078 -I fx2lafw-cypress-fx2.ihx -c 0x01 -s Vend_Ax.hex -t fx2

10) Done. Now you can disconnect the board from the computer. Leave the EEPROM jumper connected. The next time you connect the board, it will boot fx2lafw directly, and sigrok will not need to upload the firmware every time it runs.


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