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145 lines
4.2 KiB
145 lines
4.2 KiB
#!/usr/bin/env python3
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import sys
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import textwrap
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import datetime
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# Very basic bitstream to SVF converter, tested with the ULX3S WiFi interface
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def bitreverse(x):
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y = 0
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for i in range(8):
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if (x >> (7 - i)) & 1 == 1:
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y |= (1 << i)
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return y
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def convertBitToFlashFile(bitFile, FlashFile, flash_page_size = 256, address = 0, erase_block_size = 64*1024):
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with open(bitFile, 'rb') as bitf:
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bs = bitf.read()
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# Autodetect IDCODE from bitstream
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idcode_cmd = bytes([0xE2, 0x00, 0x00, 0x00])
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idcode = None
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for i in range(len(bs) - 4):
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if bs[i:i+4] == idcode_cmd:
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idcode = bs[i+4] << 24
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idcode |= bs[i+5] << 16
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idcode |= bs[i+6] << 8
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idcode |= bs[i+7]
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break
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if idcode is None:
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print("Failed to find IDCODE in bitstream, check bitstream is valid")
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sys.exit(1)
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print("IDCODE in bitstream is 0x%08x" % idcode)
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bitf.seek(0)
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last_page = -1
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with open(FlashFile, 'w') as svf:
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now = datetime.datetime.now()
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print(f"""// generated {now:%Y-%m-%d %H:%M}
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STATE RESET;
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HDR 0;
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HIR 0;
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TDR 0;
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TIR 0;
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ENDDR DRPAUSE;
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ENDIR IRPAUSE;
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STATE IDLE;
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""", file=svf)
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print("""
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SIR 8 TDI (E0);
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SDR 32 TDI (00000000)
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TDO ({:08X})
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MASK (FFFFFFFF);
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""".format(idcode), file=svf)
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print("""
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SIR 8 TDI (1C);
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SDR 510 TDI (3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
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FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
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// Enter Programming mode
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SIR 8 TDI (C6);
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SDR 8 TDI (00);
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RUNTEST IDLE 2 TCK 1.00E-02 SEC;
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// Erase
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SIR 8 TDI (0E);
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SDR 8 TDI (01);
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RUNTEST IDLE 2 TCK 2.0E-1 SEC;
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// Read STATUS
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SIR 8 TDI (3C);
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SDR 32 TDI (00000000)
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TDO (00000000)
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MASK (0000B000);
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// Exit Programming mode
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SIR 8 TDI (26);
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RUNTEST IDLE 2 TCK 1.00E-02 SEC;
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// BYPASS
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SIR 8 TDI (FF);
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STATE IDLE;
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RUNTEST 32 TCK;
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RUNTEST 2.00E-2 SEC;
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// Enter SPI mode
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SIR 8 TDI (3A);
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SDR 16 TDI (68FE);
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STATE IDLE;
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RUNTEST 32 TCK;
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RUNTEST 2.00E-2 SEC;
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// SPI IO (CMD 0xAB release Power Down???)
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SDR 8 TDI (D5);
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RUNTEST 2.00E-0 SEC;
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// CONFIRM FLASH ID (CMD 0x9f JEDEC Flash Id -> Size must be 0x16)
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SDR 32 TDI (000000F9)
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TDO (68FFFFFF)
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MASK (FF000000);
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// CMD 0x06 Write Enable + 0x01 Write 0x00 to Status Register
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SDR 8 TDI(60);
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SDR 16 TDI(0080);
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RUNTEST 1.00E-0 SEC;
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""", file=svf)
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while True:
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if((address // 0x10000) != last_page):
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last_page = (address // 0x10000)
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print(f"// CMD 0x06 Write Enable + 0xd8 Erase 64K at 0x{address:x}", file=svf)
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print("SDR 8 TDI (60);", file=svf)
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address_flipped = [bitreverse(x) for x in [0xd8,int(address // 0x10000),0x00,0x00]]
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hex_address= ["{:02X}".format(x) for x in reversed(address_flipped)]
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print("\n".join(textwrap.wrap("SDR {} TDI ({});".format(8*len(hex_address), "".join(hex_address)), 100)), file=svf)
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print("RUNTEST 3.00 SEC;\n", file=svf)
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chunk = bitf.read(flash_page_size)
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if not chunk:
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break
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# Convert chunk to bit-reversed hex
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print(f"// CMD 0x06 Write Enable + 0x02 Write Chunk to 0x{address:x}", file=svf)
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br_chunk = [bitreverse(x) for x in bytes([0x02, int(address / 0x10000 % 0x100),int(address / 0x100 % 0x100),int(address % 0x100)]) + chunk]
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address += len(chunk)
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hex_chunk = ["{:02X}".format(x) for x in reversed(br_chunk)]
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print("SDR 8 TDI (60);", file=svf)
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print("\n".join(textwrap.wrap("SDR {} TDI ({});".format(8*len(br_chunk), "".join(hex_chunk)), 100)), file=svf)
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print("RUNTEST 2.50E-2 SEC;\n", file=svf)
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print("""
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// BYPASS
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SIR 8 TDI (FF);
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//REFRESH
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SIR 8 TDI(79);
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SDR 24 TDI(000000);
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STATE IDLE;
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RUNTEST 32 TCK;
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RUNTEST 2.00E-2 SEC;
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STATE RESET;
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""", file=svf)
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if __name__ == "__main__":
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convertBitToFlashFile(sys.argv[1], sys.argv[2])
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