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This page has deprecated and moved to the new documentation framework of the main Bitcraze website. Please go to [[https://www.bitcraze.io/documentation/system/]]
</WRAP>


====== Bootloader the Crazyflie 1.0/2.0 ======
The Crazyflie can be bootloaded from the commandline using the //cfloader// script.

**Note:** To enter the bootloader for the Crazyflie 1.0 just restart the platform. To enter the bootloader for the Crazyflie 2.0 power off the platform and start it again by pressing the power button for at least 1.5 seconds, but not more than 5.

====== Programming Crazyflie from firmware projects ======

When developping with the Crazyflie firmware projects, either [[https://github.com/bitcraze/crazyflie-firmware|crazyflie-firmware]] or [[https://github.com/bitcraze/crazyflie2-nrf-firmware|crazyflie2-nrf-firmware]] you can flash your current build with:
<code>
make cload
</code>

If you want the Crazyflie to restart automatically in bootloader mode you can enable the warmboot mode. To do so, edit the file 'tool/make/config.mk' and add the address of your Crazyflie:
<code>
CLOAD_CMDS = -w radio://0/80/250K/E7E7E7E7E7
</code>

After this, 'make cload' will restart the Crazyflie in bootlader mode, flash it and restart it with the new firmware.


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In warmboot mode the bootloader is launched using a random address. This means that multiple Crazyflie can be programmed at the same time without collision.
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//**Warning**//
If the flashing operation fails or if the firmware has a bug, it may be impossible to warmboot. In that case start the bootloader manually and disable warmboot temporarly by programming with:
<code>
make cload CLOAD_CMDS=
</code>
</WRAP>


====== cfloader ======
The script is located in the //bin// directory in the //crazyflie-clients-python// repository and client. Here's how to use the script:
<code>
crazyflie-clients-python$ bin/cfclient

==============================
 CrazyLoader Flash Utility
==============================

 Usage: bin/cfloader [CRTP options] <action> [parameters]

The CRTP options are described above

Crazyload option:
   info                    : Print the info of the bootloader and quit.
                             Will let the target in bootloader mode
   reset                   : Reset the device in firmware mode
   flash <file> [targets]  : flash the <img> binary file from the first
                             possible  page in flash and reset to firmware
                             mode.
</code>

===== Crazyflie 1.0 examples =====
<code>
crazyflie-clients-python$ bin/cfloader flash cflie.bin stm32-fw
Restart the Crazyflie you want to bootload in the next  10 seconds ...  done!
Connected to bootloader on Crazyflie Nano Quadcopter (1.0) (version=0x1)
Target info: stm32 (0xFF)
Flash pages: 128 | Page size: 1024 | Buffer pages: 10 | Start page: 10
118 KBytes of flash avaliable for firmware image.

Flashing 1 of 1 to stm32 (fw): 56043 bytes (55 pages) ..........10..........10..........10..........10..........10.....5
Reset in firmware mode ...
</code>

===== Crazyflie 2.0 examples =====
Flashing new firmware for the nRF51 MCU:
<code>
crazyflie-clients-python$ bin/cfloader flash cf2_nrf.bin nrf51-fw
Restart the Crazyflie you want to bootload in the next  10 seconds ...  done!
Connected to bootloader on Crazyflie 2.0 (version=0x10)
Target info: nrf51 (0xFE)
Flash pages: 232 | Page size: 1024 | Buffer pages: 1 | Start page: 88
144 KBytes of flash avaliable for firmware image.
Target info: stm32 (0xFF)
Flash pages: 1024 | Page size: 1024 | Buffer pages: 10 | Start page: 16
1008 KBytes of flash avaliable for firmware image.

Flashing 1 of 1 to nrf51 (fw): 25151 bytes (25 pages) .1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1
Reset in firmware mode ...
</code>

Flashing new firmware for the STM32 MCU:
<code>
crazyflie-clients-python$ bin/cfloader flash cflie.bin stm32-fw
Restart the Crazyflie you want to bootload in the next  10 seconds ...  done!
Connected to bootloader on Crazyflie 2.0 (version=0x10)
Target info: nrf51 (0xFE)
Flash pages: 232 | Page size: 1024 | Buffer pages: 1 | Start page: 88
144 KBytes of flash avaliable for firmware image.
Target info: stm32 (0xFF)
Flash pages: 1024 | Page size: 1024 | Buffer pages: 10 | Start page: 16
1008 KBytes of flash avaliable for firmware image.

Flashing 1 of 1 to stm32 (fw): 76435 bytes (75 pages) ..........10..........10..........10..........10..........10..........10..........10.....5
Reset in firmware mode ...
</code>

Flash a new firmware package (containing both nRF51 and STM32 firmware):
<code>
crazyflie-clients-python$ bin/cfloader flash cf2_dev_update.zip
Restart the Crazyflie you want to bootload in the next  10 seconds ...  done!
Connected to bootloader on Crazyflie 2.0 (version=0x10)
Target info: nrf51 (0xFE)
Flash pages: 232 | Page size: 1024 | Buffer pages: 1 | Start page: 88
144 KBytes of flash avaliable for firmware image.
Target info: stm32 (0xFF)
Flash pages: 1024 | Page size: 1024 | Buffer pages: 10 | Start page: 16
1008 KBytes of flash avaliable for firmware image.

Flashing 1 of 2 to stm32 (fw): 76435 bytes (75 pages) ..........10..........10..........10..........10..........10..........10..........10.....5
Flashing 2 of 2 to nrf51 (fw): 25151 bytes (25 pages) .1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1
Reset in firmware mode ...
</code>