Why not use dfu-util to upload the firmware?

[ferazambuja]

I've tried the new code, the HAT as expected goes into DFU mode. However, it will not go to the /dev/ttyS0.

Using the USB port on the HAT shows
tail -f /var/log/kern.log
Apr 17 20:48:47 raspberrypi kernel: [ 218.765139] usb 1-1.2: new full-speed USB device number 5 using dwc_otg
Apr 17 20:48:47 raspberrypi kernel: [ 218.897807] usb 1-1.2: New USB device found, idVendor=0483, idProduct=df11
Apr 17 20:48:47 raspberrypi kernel: [ 218.897822] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 17 20:48:47 raspberrypi kernel: [ 218.897831] usb 1-1.2: Product: STM32 BOOTLOADER
Apr 17 20:48:47 raspberrypi kernel: [ 218.897839] usb 1-1.2: Manufacturer: STMicroelectronics
Apr 17 20:48:47 raspberrypi kernel: [ 218.897847] usb 1-1.2: SerialNumber: FFFFFFFEFFFF

pi@raspberrypi:~/Sensly_Install $ dfu-util -l
dfu-util 0.9

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Found DFU: [0483:df11] ver=2200, devnum=5, cfg=1, intf=0, path="1-1.2", alt=1, name="@option Bytes /0x1FFFF800/01016 e", serial="FFFFFFFEFFFF"
Found DFU: [0483:df11] ver=2200, devnum=5, cfg=1, intf=0, path="1-1.2", alt=0, name="@internal Flash /0x08000000/0640002Kg", serial="FFFFFFFEFFFF"