PC Application: partial firmware update dialog

AssembleFirmware.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+
+import os
+import binascii
+
+FPGA_BITSTREAM = "FPGA/VNA/top.bin"
+MCU_FW = "Software/VNA_embedded/Debug/VNA_embedded.bin"
+
+HEADER_SIZE = 24
+
+f = open("test.vnafw", "wb")
+f.write(bytes("VNA!", 'utf-8'))
+
+bitstream = open(FPGA_BITSTREAM, "rb")
+firmware = open(MCU_FW, "rb")
+
+size_FPGA = os.path.getsize(FPGA_BITSTREAM)
+size_MCU = os.path.getsize(MCU_FW)
+print("Got FPGA bitstream of size "+str(size_FPGA))
+print("Got MCU firmware of size "+str(size_MCU))
+
+#Create header
+# Start address of FPGA bitstream
+f.write((HEADER_SIZE).to_bytes(4, byteorder='little'))
+# Size of FPGA bitstream
+f.write(size_FPGA.to_bytes(4, byteorder='little'))
+# Start address of MCU firmware
+f.write((HEADER_SIZE + size_FPGA).to_bytes(4, byteorder='little'))
+# Size of MCU firmware
+f.write(size_MCU.to_bytes(4, byteorder='little'))
+
+# Calculate CRC
+def CRC32_from_file(filename, initial_CRC):
+	buf = open(filename,'rb').read()
+	buf = (binascii.crc32(buf, initial_CRC) & 0xFFFFFFFF)
+	return buf
+
+print("Calculating CRC...", end="")
+CRC = CRC32_from_file(FPGA_BITSTREAM, 0xFFFFFFFF)
+CRC = CRC32_from_file(MCU_FW, CRC)
+print(":"+hex(CRC))
+f.write(CRC.to_bytes(4, byteorder='little'))
+
+# Check that we used the correct header size
+if f.tell() != HEADER_SIZE:
+    print("Incorrect header size (defined as "+str(HEADER_SIZE)+" but actual header is of size "+str(f.tell())+")")
+    exit(-1)
+
+f.write(bitstream.read())
+f.write(firmware.read())
+
+if f.tell() % 256 != 0:
+    padding = 256 - f.tell() % 256
+    f.write(bytearray(padding))
+
+print("Created combined firmware file of size "+str(f.tell()))
+