STREAM Linux Installation
- Serial cable (Any 3.3V USB-to-serial cable should work)
- Altera USB Blaster (or compatible)
- FPGA image (stream.sof)
- Linux image (vmlinux)
2 Programming the FPGA
Connect the USB Blaster to the FPGA JTAG port. Use the Quartus programmer to load the FPGA image stream.sof to the board or convert the sof file to an rbf file and load it with the LMS7 GUI.
3 Attach serial console
The following pins are used for UART communication.
- FPGA_GPIO 1 : TX (from computer to Stream board)
- FPGA_GPIO 3 : RX (from Stream board to computer)
- FPGA_GPIO 10 : GND
The following UART settings are used for the Linux system
- Baud rate : 115200
Open a terminal window and connect to the serial console (e.g. screen /dev/ttyUSB0 115200)
4 Loading Linux
Go to the directory containing the Linux image (vmlinux). Launch openocd with openocd -f interface/altera-usb-blaster.cfg -f board/or1k_generic.cfg If everything works as expected, you should see the following in your terminal:
Open On-Chip Debugger 0.9.0-dev-00211-g1e23496 (2015-01-20-13:27) Licensed under GNU GPL v2 For bug reports, read http://openocd.sourceforge.net/doc/doxygen/bugs.html Warn : Adapter driver 'usb_blaster' did not declare which transports it allows; assuming legacy JTAG-only Info : only one transport option; autoselect 'jtag' Info : vjtag tap selected Info : adv debug unit selected Info : Option 7 is passed to adv debug unit Info : set servers polling period to 1ms adapter speed: 3000 kHz Info : No lowlevel driver configured, will try them all Info : usb blaster interface using libftdi Info : This adapter doesn't support configurable speed Info : JTAG tap: or1200.cpu tap/device found: 0x020f40dd (mfg: 0x06e, part: 0x20f4, ver: 0x0) Warn : JTAG tap: or1200.cpu UNEXPECTED: 0x020f40dd (mfg: 0x06e, part: 0x20f4, ver: 0x0) Error: JTAG tap: or1200.cpu expected 1 of 1: 0x020b30dd (mfg: 0x06e, part: 0x20b3, ver: 0x0) Error: Trying to use configured scan chain anyway... Warn : Bypassing JTAG setup events due to errors Info : adv debug unit is configured with option ADBG_USE_HISPEED Info : adv debug unit is configured with option ENABLE_JSP_MULTI Info : adv debug unit is configured with option ENABLE_JSP_SERVER Halting processor target state: halted Chip is or1200.cpu, Endian: big, type: or1k Target ready...
Open a new terminal window and connect to the OpenOCD proxy with telnet localhost 4444. This should result in something like the following:
OpenOCD telnet output
Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Open On-Chip Debugger >
Run the following command to load the Linux image halt; load_image vmlinux; reg npc 0x100; reset The Linux boot process should now start in the terminal connected to the serial console. After the boot is complete you should be greeted by a message saying Please press Enter to activate this console.