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#!/usr/bin/python3
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import argparse
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import os
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import subprocess
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import sys
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BASE = os.path.dirname(os.path.abspath(__file__))
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CONFIG = os.path.join(BASE, "xilinx-xc7.cfg")
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def flash(config, flash_proxy, address, data, set_qe=False):
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script = "; ".join([
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"init",
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"jtagspi_init 0 {{{}}}".format(flash_proxy),
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"jtagspi set_qe 0 1" if set_qe else "",
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"jtagspi_program {{{}}} 0x{:x}".format(data, address),
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"fpga_program",
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"exit"
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])
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subprocess.call(["openocd", "-f", config, "-c", script])
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parser = argparse.ArgumentParser()
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parser.add_argument("file", help="file to write to flash")
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parser.add_argument("-a", "--address", help="offset in flash", type=lambda x: int(x,0), default=0)
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parser.add_argument("-f", "--fpga", help="a35 or a100", default="a35")
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args = parser.parse_args()
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if args.fpga.lower() == "a35":
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proxy = "bscan_spi_xc7a35t.bit"
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elif args.fpga.lower() == "a100":
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proxy = "bscan_spi_xc7a100t.bit"
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else:
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print("error: specify a35 or a100 when flashing")
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sys.exit()
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proxy = os.path.join(BASE, proxy)
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flash(CONFIG, proxy, args.address, args.file)
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