diff --git a/src/Makefile b/src/Makefile
index 50e4a519..4e521c0a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -345,7 +345,7 @@ FORCE:
 
 %.dfu: %.hex $(LDSCRIPT)
 	$(OUT_LOG) echo Creating $@
-	$(OUT_CMD) $(PYTHON) build-scripts/dfu-convert.py -r $(FW_REVISION) -i $< $@
+	$(OUT_CMD) build-scripts/dfu-convert -r $(FW_REVISION) -i $< $@
 
 # This rule hook is defined in the ChibiOS build system
 PRE_MAKE_ALL_RULE_HOOK: ./common/hydrafw_version.hdr
diff --git a/src/build-scripts/Makefile b/src/build-scripts/Makefile
new file mode 100644
index 00000000..3bcc94af
--- /dev/null
+++ b/src/build-scripts/Makefile
@@ -0,0 +1,24 @@
+# Compiler
+CC = gcc
+# Compiler flags
+CFLAGS = -Wall -Wextra -std=c99
+
+# Source files
+SRCS = dfu-convert.c
+
+# Output executable
+TARGET = dfu-convert
+
+# Default target
+all: $(TARGET)
+
+# Build the target
+$(TARGET): $(SRCS)
+	$(CC) $(CFLAGS) -o $(TARGET) $(SRCS)
+
+# Clean up
+clean:
+	rm -f $(TARGET)
+
+# Phony targets
+.PHONY: all clean
\ No newline at end of file
diff --git a/src/build-scripts/dfu-convert.c b/src/build-scripts/dfu-convert.c
new file mode 100644
index 00000000..ce2b49e3
--- /dev/null
+++ b/src/build-scripts/dfu-convert.c
@@ -0,0 +1,263 @@
+/* gcc -Wall -O3 -o dfu-convert dfu-convert.c see also Makefile
+ * Python3 version Written by Antonio Galea - 2010/11/18 Distributed under Gnu LGPL 3.0
+ *
+ * Copyright (C) 2024 Benjamin VERNOUX (C version)
+ * Distributed under Gnu LGPL 3.0
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#define DEFAULT_DEVICE "0x0483:0xdf11"
+#define DEFAULT_REVISION "0.0"
+#define MAX_DATA_SIZE 1048576 // 1 MB buffer for static allocation
+#define MAX_LINE_LENGTH 256
+#define MAX_FILES 10
+
+static uint8_t data[MAX_DATA_SIZE];
+
+typedef struct {
+    char signature[5];
+    uint8_t version;
+    uint32_t size;
+    uint8_t targets;
+} Prefix;
+
+typedef struct {
+    uint32_t address;
+    uint32_t size;
+} ElementPrefix;
+
+typedef struct {
+    uint16_t device;
+    uint16_t product;
+    uint16_t vendor;
+    uint16_t dfu;
+    char ufd[3];
+    uint8_t len;
+    uint32_t crc;
+} Suffix;
+
+static uint32_t crc_table[256] = {
+    0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL, 0x076DC419L, 0x706AF48FL,
+    0xE963A535L, 0x9E6495A3L, 0x0EDB8832L, 0x79DCB8A4L, 0xE0D5E91EL, 0x97D2D988L,
+    0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L, 0x90BF1D91L, 0x1DB71064L, 0x6AB020F2L,
+    0xF3B97148L, 0x84BE41DEL, 0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L,
+    0x136C9856L, 0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL, 0x14015C4FL, 0x63066CD9L,
+    0xFA0F3D63L, 0x8D080DF5L, 0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L, 0xA2677172L,
+    0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL, 0x35B5A8FAL, 0x42B2986CL,
+    0xDBBBC9D6L, 0xACBCF940L, 0x32D86CE3L, 0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L,
+    0x26D930ACL, 0x51DE003AL, 0xC8D75180L, 0xBFD06116L, 0x21B4F4B5L, 0x56B3C423L,
+    0xCFBA9599L, 0xB8BDA50FL, 0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L,
+    0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL, 0x76DC4190L, 0x01DB7106L,
+    0x98D220BCL, 0xEFD5102AL, 0x71B18589L, 0x06B6B51FL, 0x9FBFE4A5L, 0xE8B8D433L,
+    0x7807C9A2L, 0x0F00F934L, 0x9609A88EL, 0xE10E9818L, 0x7F6A0DBBL, 0x086D3D2DL,
+    0x91646C97L, 0xE6635C01L, 0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL,
+    0x6C0695EDL, 0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L, 0x65B0D9C6L, 0x12B7E950L,
+    0x8BBEB8EAL, 0xFCB9887CL, 0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L, 0xFBD44C65L,
+    0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L, 0x4ADFA541L, 0x3DD895D7L,
+    0xA4D1C46DL, 0xD3D6F4FBL, 0x4369E96AL, 0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L,
+    0x44042D73L, 0x33031DE5L, 0xAA0A4C5FL, 0xDD0D7CC9L, 0x5005713CL, 0x270241AAL,
+    0xBE0B1010L, 0xC90C2086L, 0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL,
+    0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L, 0x59B33D17L, 0x2EB40D81L,
+    0xB7BD5C3BL, 0xC0BA6CADL, 0xEDB88320L, 0x9ABFB3B6L, 0x03B6E20CL, 0x74B1D29AL,
+    0xEAD54739L, 0x9DD277AFL, 0x04DB2615L, 0x73DC1683L, 0xE3630B12L, 0x94643B84L,
+    0x0D6D6A3EL, 0x7A6A5AA8L, 0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L,
+    0xF00F9344L, 0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL, 0xF762575DL, 0x806567CBL,
+    0x196C3671L, 0x6E6B06E7L, 0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL, 0x67DD4ACCL,
+    0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L, 0xD6D6A3E8L, 0xA1D1937EL,
+    0x38D8C2C4L, 0x4FDFF252L, 0xD1BB67F1L, 0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL,
+    0xD80D2BDAL, 0xAF0A1B4CL, 0x36034AF6L, 0x41047A60L, 0xDF60EFC3L, 0xA867DF55L,
+    0x316E8EEFL, 0x4669BE79L, 0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L,
+    0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL, 0xC5BA3BBEL, 0xB2BD0B28L,
+    0x2BB45A92L, 0x5CB36A04L, 0xC2D7FFA7L, 0xB5D0CF31L, 0x2CD99E8BL, 0x5BDEAE1DL,
+    0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL, 0x026D930AL, 0x9C0906A9L, 0xEB0E363FL,
+    0x72076785L, 0x05005713L, 0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L,
+    0x92D28E9BL, 0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L, 0x86D3D2D4L, 0xF1D4E242L,
+    0x68DDB3F8L, 0x1FDA836EL, 0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L, 0x18B74777L,
+    0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL, 0x8F659EFFL, 0xF862AE69L,
+    0x616BFFD3L, 0x166CCF45L, 0xA00AE278L, 0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L,
+    0xA7672661L, 0xD06016F7L, 0x4969474DL, 0x3E6E77DBL, 0xAED16A4AL, 0xD9D65ADCL,
+    0x40DF0B66L, 0x37D83BF0L, 0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L,
+    0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L, 0xBAD03605L, 0xCDD70693L,
+    0x54DE5729L, 0x23D967BFL, 0xB3667A2EL, 0xC4614AB8L, 0x5D681B02L, 0x2A6F2B94L,
+    0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL, 0x2D02EF8DL
+};
+
+uint32_t compute_crc(const uint8_t *buf_data, size_t length) {
+    uint32_t crc = 0xFFFFFFFF;
+
+    for (size_t i = 0; i < length; i++) {
+        uint8_t byte = buf_data[i];
+        uint32_t lookup_index = (crc ^ byte) & 0xFF;
+        crc = (crc >> 8) ^ crc_table[lookup_index];
+    }
+
+    return ~crc;
+}
+
+int parse_device(const char *device, uint16_t *vendor_id, uint16_t *product_id) {
+    if (sscanf(device, "0x%4hx:0x%4hx", vendor_id, product_id) != 2) {
+        return -1;
+    }
+    return 0;
+}
+
+void print_help(const char *progname) {
+    printf("Usage: %s {-i|--ihex} file.hex [-i file.hex ...] [{-D|--device} vendor:device] outfile.dfu\n", progname);
+    printf("\n");
+    printf("Options:\n");
+    printf("  -i, --ihex      Build a DFU file from given HEXFILES\n");
+    printf("  -D, --device    Build for DEVICE, defaults to %s\n", DEFAULT_DEVICE);
+    printf("  -r, --revision  Revision number, defaults to %s\n", DEFAULT_REVISION);
+}
+
+// Simple function to convert hex character to integer
+uint8_t hex_char_to_int(char c) {
+    if (c >= '0' && c <= '9') return c - '0';
+    if (c >= 'A' && c <= 'F') return c - 'A' + 10;
+    if (c >= 'a' && c <= 'f') return c - 'a' + 10;
+    return 0;
+}
+
+// Function to parse a line from Intel HEX file
+int parse_hex_line(const char *line, uint32_t *address, uint8_t *buf_data, size_t *data_len) {
+    if (line[0] != ':') return -1;
+    int len = (hex_char_to_int(line[1]) << 4) | hex_char_to_int(line[2]);
+    *address = (hex_char_to_int(line[3]) << 12) | (hex_char_to_int(line[4]) << 8) | (hex_char_to_int(line[5]) << 4) | hex_char_to_int(line[6]);
+    int type = (hex_char_to_int(line[7]) << 4) | hex_char_to_int(line[8]);
+
+    if (type != 0) return -1; // Only support data records
+
+    for (int i = 0; i < len; i++) {
+        buf_data[i] = (hex_char_to_int(line[9 + i * 2]) << 4) | hex_char_to_int(line[10 + i * 2]);
+    }
+    *data_len = len;
+    return 0;
+}
+
+void build_from_hex(const char *file, char **hexfiles, int hexfile_count, const char *device, const char *revision) {
+    size_t data_size = 0;
+
+    for (int i = 0; i < hexfile_count; ++i) {
+        const char *hexfile = hexfiles[i];
+        FILE *f = fopen(hexfile, "r");
+        if (!f) {
+            fprintf(stderr, "Error opening file: %s\n", strerror(errno));
+            exit(EXIT_FAILURE);
+        }
+
+        char line[MAX_LINE_LENGTH];
+        while (fgets(line, sizeof(line), f)) {
+            uint32_t address;
+            uint8_t line_data[MAX_LINE_LENGTH];
+            size_t line_data_len;
+
+            if (parse_hex_line(line, &address, line_data, &line_data_len) == 0) {
+                if (data_size + sizeof(ElementPrefix) + line_data_len > MAX_DATA_SIZE) {
+                    fprintf(stderr, "Data buffer overflow\n");
+                    fclose(f);
+                    exit(EXIT_FAILURE);
+                }
+                ElementPrefix eprefix = {address, line_data_len};
+                memcpy(data + data_size, &eprefix, sizeof(ElementPrefix));
+                memcpy(data + data_size + sizeof(ElementPrefix), line_data, line_data_len);
+                data_size += sizeof(ElementPrefix) + line_data_len;
+            }
+        }
+        fclose(f);
+    }
+
+    uint16_t device_id, product_id;
+    if (parse_device(device, &device_id, &product_id) != 0) {
+        fprintf(stderr, "Invalid device format: %s\n", device);
+        exit(EXIT_FAILURE);
+    }
+
+    uint16_t revision_number;
+    if (sscanf(revision, "%hx.%hx", &revision_number, &revision_number) != 2) {
+        fprintf(stderr, "Invalid revision format: %s\n", revision);
+        exit(EXIT_FAILURE);
+    }
+
+    Suffix suffix = {device_id, product_id, 0x0483, 0x011a, {'U', 'F', 'D'}, 16, 0};
+    if (data_size + sizeof(Suffix) > MAX_DATA_SIZE) {
+        fprintf(stderr, "Data buffer overflow\n");
+        exit(EXIT_FAILURE);
+    }
+
+    memcpy(data + data_size, &suffix, sizeof(Suffix));
+    data_size += sizeof(Suffix);
+
+    suffix.crc = compute_crc(data, data_size);
+    memcpy(data + data_size - sizeof(uint32_t), &suffix.crc, sizeof(uint32_t));
+
+    FILE *outfile = fopen(file, "wb");
+    if (!outfile) {
+        fprintf(stderr, "Error opening output file: %s\n", strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+
+    fwrite(data, 1, data_size, outfile);
+    fclose(outfile);
+}
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) {
+        print_help(argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    const char *infile = NULL;
+    int ihex_mode = 0;
+    const char *device = DEFAULT_DEVICE;
+    const char *revision = DEFAULT_REVISION;
+    char *hexfiles[MAX_FILES];
+    int hexfile_count = 0;
+    const char *outfile = NULL;
+
+    for (int i = 1; i < argc; ++i) {
+        if (strcmp(argv[i], "-i") == 0 || strcmp(argv[i], "--ihex") == 0) {
+            ihex_mode = 1;
+            if (i + 1 < argc && hexfile_count < MAX_FILES) {
+                hexfiles[hexfile_count++] = argv[++i];
+            } else {
+                fprintf(stderr, "Option -i requires an argument or exceeds maximum number of files\n");
+                return EXIT_FAILURE;
+            }
+        } else if (strcmp(argv[i], "-D") == 0 || strcmp(argv[i], "--device") == 0) {
+            if (i + 1 < argc) {
+                device = argv[++i];
+            } else {
+                fprintf(stderr, "Option -D requires an argument\n");
+                return EXIT_FAILURE;
+            }
+        } else if (strcmp(argv[i], "-r") == 0 || strcmp(argv[i], "--revision") == 0) {
+            if (i + 1 < argc) {
+                revision = argv[++i];
+            } else {
+                fprintf(stderr, "Option -r requires an argument\n");
+                return EXIT_FAILURE;
+            }
+        } else {
+            infile = argv[i];
+        }
+    }
+
+    if (infile) {
+        if (ihex_mode) {
+            build_from_hex(outfile, hexfiles, hexfile_count, device, revision);
+        } else {
+			print_help(argv[0]);
+			return EXIT_FAILURE;
+        }
+    } else {
+        print_help(argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}
diff --git a/src/build-scripts/dfu-convert.exe b/src/build-scripts/dfu-convert.exe
new file mode 100644
index 00000000..37639b6b
Binary files /dev/null and b/src/build-scripts/dfu-convert.exe differ
diff --git a/src/build-scripts/dfu-convert.py b/src/build-scripts/dfu-convert.py
deleted file mode 100644
index f23482fa..00000000
--- a/src/build-scripts/dfu-convert.py
+++ /dev/null
@@ -1,158 +0,0 @@
-#!/usr/bin/env python3
-
-# Written by Antonio Galea - 2010/11/18
-# Distributed under Gnu LGPL 3.0
-# see http://www.gnu.org/licenses/lgpl-3.0.txt
-
-import sys,struct,zlib,os
-from optparse import OptionParser
-from intelhex import IntelHex
-
-DEFAULT_DEVICE="0x0483:0xdf11"
-DEFAULT_REVISION="0.0"
-
-def named(tuple,names):
-  return dict(list(zip(names.split(),tuple)))
-def consume(fmt,data,names):
-  n = struct.calcsize(fmt)
-  return named(struct.unpack(fmt,data[:n]),names),data[n:]
-def cstring(string):
-  return string.split(b'\0',1)[0]
-def compute_crc(data):
-  return 0xFFFFFFFF & -zlib.crc32(data) -1
-def rev2byte(revision):
-    ma,mi = revision.split('.')
-    return (int(ma,16)<<8 | int(mi,16))
-
-def parse(file,dump_images=False):
-  print('File: "%s"' % file)
-  data = open(file,'rb').read()
-  crc = compute_crc(data[:-4])
-  prefix, data = consume('<5sBIB',data,'signature version size targets')
-  print('%(signature)s v%(version)d, image size: %(size)d, targets: %(targets)d' % prefix)
-  for t in range(prefix['targets']):
-    tprefix, data  = consume('<6sBI255s2I',data,'signature altsetting named name size elements')
-    tprefix['num'] = t
-    if tprefix['named']:
-      tprefix['name'] = cstring(tprefix['name'])
-    else:
-      tprefix['name'] = ''
-    print('%(signature)s %(num)d, alt setting: %(altsetting)s, name: "%(name)s", size: %(size)d, elements: %(elements)d' % tprefix)
-    tsize = tprefix['size']
-    target, data = data[:tsize], data[tsize:]
-    for e in range(tprefix['elements']):
-      eprefix, target = consume('<2I',target,'address size')
-      eprefix['num'] = e
-      print('  %(num)d, address: 0x%(address)08x, size: %(size)d' % eprefix)
-      esize = eprefix['size']
-      image, target = target[:esize], target[esize:]
-      if dump_images:
-        out = '%s.target%d.image%d.bin' % (file,t,e)
-        open(out,'wb').write(image)
-        print('    DUMPED IMAGE TO "%s"' % out)
-    if len(target):
-      print("target %d: PARSE ERROR" % t)
-  suffix = named(struct.unpack('<4H3sBI',data[:16]),'device product vendor dfu ufd len crc')
-  print('usb: %(vendor)04x:%(product)04x, device: 0x%(device)04x, dfu: 0x%(dfu)04x, %(ufd)s, %(len)d, 0x%(crc)08x' % suffix)
-  if crc != suffix['crc']:
-    print("CRC ERROR: computed crc32 is 0x%08x" % crc)
-  data = data[16:]
-  if data:
-    print("PARSE ERROR")
-
-def build(file,targets,device=DEFAULT_DEVICE, revision="0.0"):
-  data = b''
-  for t,target in enumerate(targets):
-    tdata = b''
-    for image in target:
-      tdata += struct.pack('<2I',image['address'],len(image['data']))+image['data']
-    tdata = struct.pack('<6sBI255s2I',b'Target',0,1,b'ST...',len(tdata),len(target)) + tdata
-    data += tdata
-  data  = struct.pack('<5sBIB',b'DfuSe',1,len(data)+11,len(targets)) + data
-  v,d=[int(x,0) & 0xFFFF for x in device.split(':',1)]
-  rev = rev2byte(revision)
-  data += struct.pack('<4H3sB',rev,d,v,0x011a,b'UFD',16)
-  crc   = compute_crc(data)
-  data += struct.pack('<I',crc)
-  open(file,'wb').write(data)
-
-if __name__=="__main__":
-  usage = """
-%prog [-d|--dump] infile.dfu
-%prog {-b|--build} address:file.bin [-b address:file.bin ...] [{-D|--device}=vendor:device] outfile.dfu
-%prog {-i|--ihex} file.hex [-i file.hex ...] [{-D|--device}=vendor:device] outfile.dfu"""
-
-  parser = OptionParser(usage=usage)
-  parser.add_option("-b", "--build", action="append", dest="binfiles",
-    help="build a DFU file from given BINFILES", metavar="BINFILES")
-  parser.add_option("-i", "--ihex", action="append", dest="hexfiles",
-    help="build a DFU file from given HEXFILES", metavar="HEXFILES")
-  parser.add_option("-D", "--device", action="store", dest="device",
-    help="build for DEVICE, defaults to %s" % DEFAULT_DEVICE, metavar="DEVICE")
-  parser.add_option("-r", "--revision", action="store", dest="revision",
-    help="Revision number, defaults to %s" % DEFAULT_REVISION, metavar="REVISION")
-  parser.add_option("-d", "--dump", action="store_true", dest="dump_images",
-    default=False, help="dump contained images to current directory")
-  (options, args) = parser.parse_args()
-
-  if (options.binfiles or options.hexfiles) and len(args)==1:
-    target = []
-    
-    if options.binfiles:
-      for arg in options.binfiles:
-        try:
-          address,binfile = arg.split(':',1)
-        except ValueError:
-          print("Address:file couple '%s' invalid." % arg)
-          sys.exit(1)
-        try:
-          address = int(address,0) & 0xFFFFFFFF
-        except ValueError:
-          print("Address %s invalid." % address)
-          sys.exit(1)
-        if not os.path.isfile(binfile):
-          print("Unreadable file '%s'." % binfile)
-          sys.exit(1)
-        target.append({ 'address': address, 'data': open(binfile,'rb').read() })
-    
-    if options.hexfiles:
-      for hex in options.hexfiles:
-        ih = IntelHex(hex)
-        address = ih.minaddr()
-        data = ih.tobinstr()
-        try:
-          address = address & 0xFFFFFFFF
-        except ValueError:
-          print("Address %s invalid." % address)
-          sys.exit(1)
-        target.append({ 'address': address, 'data': data })
-
-    revision = DEFAULT_REVISION
-    if options.revision:
-        try:
-            rev2byte(options.revision)
-            revision  = options.revision
-        except ValueError:
-            print("Invalid revision value.")
-            sys.exit(1)
-    
-    outfile = args[0]
-    device = DEFAULT_DEVICE
-    if options.device:
-      device=options.device
-    try:
-      v,d=[int(x,0) & 0xFFFF for x in device.split(':',1)]
-    except:
-      print("Invalid device '%s'." % device)
-      sys.exit(1)
-    build(outfile,[target],device, revision)
-  elif len(args)==1:
-    infile = args[0]
-    if not os.path.isfile(infile):
-      print("Unreadable file '%s'." % infile)
-      sys.exit(1)
-    parse(infile, dump_images=options.dump_images)
-  else:
-    parser.print_help()
-    sys.exit(1)
-