FX2 microcontroller firmware can work in several modes. To switch between modes used combination of COM port baudrate and parity parameters.
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Mode | Enter | Description | Exit |
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COM | Power cycle or exit from CLI mode | Default mode. Provide Virtual COM port interface to FPGA. | Change Baudrate/Parity (CLI / EEPROM Write / Flash Write) | CLI | Baudrate = 123456 | Command Line Interface. Provide set of module management commands. | Power cycle (COM).
Change Baudrate/Parity (EEPROM Write / Flash Write).
'quit' command (COM) | EEPROM Write | Baudrate = 222222 Parity = Odd | Received data written by I2C interface to EEPROM. | Power cycle (COM).
Change Baudrate/Parity works, but not recommended. | Flash Write | Baudrate = 333333 Parity = Even | Received data written to SPI Flash. | Power cycle (COM).
Change Baudrate/Parity works, but not recommended. |
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Command Line Interface modeCLI mode provide wide set of commands to manipulate module.
To enter CLI mode, switch COM port "Baudrate" to "123456".
In this mode firmware read user input and process commands. Commands is case sensitive and should be lower-case. "Backspace" can be used for command line correction. "Enter" with empty command line cause re-execution of previous command.
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| title | CLI mode command set |
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Command | Description |
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ver | Print firmware version | power off | Disable FPGA power supply | power on | Enable FPGA power supply | flash status | Print SPI Flash Status registers | flash id | Print SPI Flash IDCODE | flash erase | SPI Flash "Bulk erase" | flash unlock | Clear SPI Flash "Status register" | flash read | Read data from SPI Flash | fpga status | Print status of FPGA pins | fpga reset | Reset FPGA | quit | Quit from CLI mode to COM mode |
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Table 3: CLI mode command set
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"ver" command...
The "flash id" command read and print first 3 bytes from result of SPI Flash "READ IDENTIFICATION" command.
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| title | "READ IDENTIFICATION" result layout |
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Byte | Description |
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1 | Manufacturer ID | 2 | Memory Type | 3 | Memory Capacity |
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Table 4: "READ IDENTIFICATION" result layout
For Trenz Electronic modules possible values is.
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Flash | Manufacturer ID | Memory Type | Capacity |
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M25P32 | 20h - Micron | 20h | 16h | W25Q64FV | EFh - Winbond | 40h | 17h |
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Table 5: Flash IDCODEs
Note: To get full control on SPI bus firmware disable FPGA power supply before this operation. After each flash command, use "power on" command and "fpga reset" command to run FPGA.
Example:
> flash id
IDCODE EF4017
W25Q64FV
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The "fpga status" command print FPGA pins information. Information printed in 6 chars sequence {d|D}{i|I}{s|S}{p|P}{|0}{|1}.
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| title | "fpga status" FPGA pins information printed in 6 chars sequence |
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Char | Value | Description |
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1 | d | "Done" pin is 0 | | D | "Done" pin is 1 | 2 | i | "Init" pin is 0 | | I | "Init" pin is 1 | 3 | s | FPGA Power supply disabled | | S | FPGA Power supply enabled | 4 | p | "PROG_B" pin is 0 | | P | "PROG_B" pin is 1 | 5 | - | "Int0" pin is 0 | | 0 | "Int1" pin is 1 | 6 | - | "Int1" pin is 0 | | 1 | "Int1" pin is 1 |
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Example:
> fpga status
DISP--
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For Windows OS this sequence can be done using "bat" file.
mode.com COM1: PARITY=E BAUD=333333
copy /b new_project.bin COM1:
This example write "new_project.bin" file content to Flash using COM1 port. Refer your OS information for right COM port numberWindows can work incorrectly with high port numbers. Change COM port number to COM1-COM4 if you face this problem..
Firmware automatically provide sector erase before write data. 
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To generate bitsream file in binary format use "-g Binary:yes" bitgen option. In Xilinx ISE it can be done by checking "Generate Programming File" → "Process properties" → "Create Binary Configuration File". In Xilinx XPS this option should be added to etc/bitgen.ut file.