Merge pull request #35 from doegox/phil_tools_dfu

Add helper scripts to enter DFU from USB or from BLE

resource/tools/enter_dfu.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+import serial
+import serial.tools.list_ports as list_ports
+
+DFUCMD=b'\x11\xef\x03\xf2\x00\x00\x00\x00\x0b\x00'
+
+port = None
+for comport in list_ports.comports():
+    if comport.vid == 0x1915 and comport.pid == 0x521f:
+        print("Chameleon already in DFU mode")
+        exit(0)
+    if comport.vid == 0x6868 and comport.pid == 0x8686:
+      port = comport.device
+      break
+
+if port is None:
+    print("Chameleon not found")
+    exit(1)
+
+try:
+    serial_instance = serial.Serial(port=port, baudrate=115200)
+    serial_instance.dtr = 1  # must make dtr enable
+    serial_instance.timeout = 0  # noblock
+    serial_instance.write(DFUCMD)
+except Exception as e:
+    print(f"Serial Error {e}.")
+    exit(1)
+finally:
+    serial_instance.close()

resource/tools/enter_dfu_over_ble.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+import asyncio
+from bleak import BleakClient
+from bleak import BleakScanner
+
+UUID_NORDIC_TX = "6e400002-b5a3-f393-e0a9-e50e24dcca9e"
+UUID_NORDIC_RX = "6e400003-b5a3-f393-e0a9-e50e24dcca9e"
+DFUCMD=b'\x11\xef\x03\xf2\x00\x00\x00\x00\x0b\x00'
+
+async def main():
+    print("Searching ChameleonUltra...")
+    device = await BleakScanner.find_device_by_name("ChameleonUltra")
+    if device is None:
+        print("Could not find ChameleonUltra")
+        return
+    print("Found!")
+    print("Sending DFU command")
+    async with BleakClient(device) as client:
+        c=DFUCMD
+        await client.write_gatt_char(UUID_NORDIC_TX, bytearray(DFUCMD), False)
+        print("Done!")
+
+asyncio.run(main())