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The Xilinx SPI flashing proxies come from here:
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https://github.com/quartiq/bscan_spi_bitstreams/blob/single-tap/bscan_spi_xc7a35t.bit?raw=true
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https://github.com/quartiq/bscan_spi_bitstreams/blob/single-tap/bscan_spi_xc7a100t.bit?raw=true
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These are the "old" single tap versions that are supported by the openocd
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release packaged in distros (0.10). If you use the wrong versions you see this:
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$ ./openocd/flash-arty microwatt_0.bit
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Open On-Chip Debugger 0.10.0
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Licensed under GNU GPL v2
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For bug reports, read
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http://openocd.org/doc/doxygen/bugs.html
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none separate
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Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
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adapter speed: 25000 kHz
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fpga_program
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Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
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Info : clock speed 25000 kHz
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Info : JTAG tap: xc7.tap tap/device found: 0x0362d093 (mfg: 0x049 (Xilinx), part: 0x362d, ver: 0x0)
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loaded file openocd/bscan_spi_xc7a35t.bit to pld device 0 in 0s 152803us
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Info : JTAG tap: xc7.tap tap/device found: 0x0362d093 (mfg: 0x049 (Xilinx), part: 0x362d, ver: 0x0)
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Error: Unknown flash device (ID 0x00ffffff)
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If you find yourself with a later openocd version that contians 867bdb2e9248
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("jtagspi: new protocol that includes transfer length"), such as v0.11 as
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packaged by Debian Bullseye, you should use the bitstream from the master
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branch:
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https://github.com/quartiq/bscan_spi_bitstreams/blob/master/bscan_spi_xc7a35t.bit?raw=true
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https://github.com/quartiq/bscan_spi_bitstreams/blob/master/bscan_spi_xc7a100t.bit?raw=true
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These are in the microwatt repository as bscan_spi_xc7a*t_openocd_v0.11.bit.
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