As a continuation of series of experiments with Basys2 board and FT232H-based JTAG adapter, I provide an easy way to generate SVF files for their further use in OpenOCD to program the board. No GUI interaction is needed, so it is saves a lot of time.
Programming the FPGA Chip
Suppose that you have generated a *.bit file for the xc3s100e chip. Converting it to SVF can be done in iMPACT's batch mode with the following script:
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# Content of the Impact_FPGA.cmd file setMode -bs setCable -port svf -file "Project_FPGA.svf" addDevice -p 1 -file "Project.bit" addDevice -p 2 -part xcf02s Program -p 1 exit |
Actual generation of the SVF file is done in BASH with two lines:
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[johndoe@ArchLinux]% source /opt/Xilinx/14.7/ISE_DS/settings64.sh [johndoe@ArchLinux]% impact -batch Impact_FPGA.cmd |
Generated Project_FPGA.svf file can be used in OpenOCD to program the FPGA chip.
Programming the PROM
For the xcf02s flash PROM, firstly we need to generate a PROM image:
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promgen -w -s 128 -p mcs -o Project.mcs -u 0 Project.bit |
The size of the *.bit file for the xc3s100e 72.8 kB, so the smallest size which is power of two should be 128 kB. The iMPACT script for generation of SVF, capable of programming xcf02s PROM chip:
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# Content of the Impact_PROM.cmd file setMode -bs setCable -port svf -file "Project_PROM.svf" addDevice -p 1 -part xc3s100e addDevice -p 2 -part xcf02s assignFile -p 2 -file "Project_LED.mcs" Program -p 2 -e exit |
Actual generation of the SVF file is done in BASH with two lines:
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[johndoe@ArchLinux]% source /opt/Xilinx/14.7/ISE_DS/settings64.sh [johndoe@ArchLinux]% impact -batch Impact_PROM.cmd |
Now let's program both of the chips. Start OpenOCD server:
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[johndoe@ArchLinux]% openocd -f OpenOCD/FT232H.cfg -f OpenOCD/Basys2.cfg Open On-Chip Debugger 0.10.0 Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html adapter speed: 6000 kHz xc3s_get_dna Info : clock speed 6000 kHz Info : JTAG tap: prom.tap tap/device found: 0xf5045093 (mfg: 0x049 (Xilinx), part: 0x5045, ver: 0xf) Info : JTAG tap: spartan3e.tap tap/device found: 0x11c10093 (mfg: 0x049 (Xilinx), part: 0x1c10, ver: 0x1) Warn : gdb services need one or more targets defined |
Login as a client and run SVF files:
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[johndoe@ArchLinux]% telnet localhost 4444 Trying ::1... Connection failed: Connection refused Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Open On-Chip Debugger > scan_chain TapName Enabled IdCode Expected IrLen IrCap IrMask -- ------------------- -------- ---------- ---------- ----- ----- ------ 0 prom.tap Y 0xf5045093 0xf5045093 8 0x01 0x03 1 spartan3e.tap Y 0x11c10093 0x11c10093 6 0x01 0x03 > svf Project_FPGA.svf Time used: 0m0s655ms svf file programmed successfully for 58 commands with 0 errors > svf Project_PROM.svf Time used: 0m18s718ms svf file programmed successfully for 1936 commands with 0 errors |
Looks good but dealing with two iMPACT scripts clutters the directory with unnecessary files. Let's automate the building process and the iMPACT file generation. Here is a Makefile which does all of the work:
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# Makefile # This make file was written for Basys2 development board Project = Sliding_LED SVF_FPGA = $(Project)_FPGA.svf SVF_PROM = $(Project)_PROM.svf FlashSize = 128 # Size in kilobytes, power of two ISE_DIR ?= /opt/Xilinx/14.7/ISE_DS XIL_ENV ?= . $(ISE_DIR)/settings64.sh all: Impact_FPGA.cmd Impact_PROM.cmd $(XIL_ENV); \ for i in $^; do impact -batch $$i; done Impact_FPGA.cmd: $(Project).bit rm -f $@ echo "setMode -bs" > $@ echo "setCable -port svf -file \"$(SVF_FPGA)\"" >> $@ echo "addDevice -p 1 -file \"$(Project).bit\"" >> $@ echo "addDevice -p 2 -part xcf02s" >> $@ echo "Program -p 1" >> $@ echo "exit" >> $@ Impact_PROM.cmd: $(Project).mcs $(Project).cfi rm -f $@ echo "setMode -bs" > $@ echo "setCable -port svf -file \"$(SVF_PROM)\"" >> $@ echo "addDevice -p 1 -part xc3s100e" >> $@ echo "addDevice -p 2 -part xcf02s" >> $@ echo "assignFile -p 2 -file \"$(Project).mcs\"" >> $@ echo "Program -p 2 -e" >> $@ echo "exit" >> $@ $(Project).mcs: $(Project).bit $(XIL_ENV); \ promgen -w -s $(FlashSize) -p mcs -o $@ -u 0 $< clean: rm -f $(Project).mcs $(Project).cfi $(SVF_FPGA) $(SVF_PROM) |
Building SVFs is a one-line command now:
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[johndoe@ArchLinux]% make |