====== Flash STM32 Primer over UART1 ======


Get  [[http://www.stm32circle.com/resources/stm32primer.php|STM32 primer]].

{{  :tutorial:small_description.png  |STM32 Primer}}

FIXME Need write about device.

===== Rework =====

{{  :tutorial:primer-full.jpg?600  |Primer}}

==== Step 1 ====

You need TTL3.3v serial port. Example USB to UART Prolific PL-2303 chip.

  * Connect ''TX'' line of serial port to ''RxD'' (sic!) point on primer's board.
  * Connect ''RX'' line of serial port to ''TxD'' (sic!) point on primer's board.
  * Connect port and primer grounds ''GND''.

{{  :tutorial:stage3.jpg?400  |Step 1}}

==== Step 2 ====

Resolder ''R48'' that would pull-down ''Boot1'' processor pin.

{{  :tutorial:stage1.jpg?400  |Step 2}}

==== Step 3 ====

''R42'' change with 10К resistor.

Connect ''Boot0'' point to ''nRTS'' line of serial port or use jumper instead ''R49'' to enter program mode after reset

{{  :tutorial:stage2.jpg?400  |Step 3}}

==== Step 4 ====

Connect ''nDTR'' of serial port to ''Reset'' point via semi-key and/or connect button to ''Reset'' and ''GND'' points on primer board.

{{  :tutorial:semi-key.png|Semi-key}}

{{:tutorial:stage4.jpg?400  |Step 4}}

==== Final ====

{{  :tutorial:stm32primer-mod.jpg?400  |Final}}

===== STM32 Loader =====

Install python and pyserial library. On Debian type command

  apt-get install python python-serial

Download flash loader {{:tutorial:stm32loader.py.gz}}

Get help:

  ./stm32loader.py --help

Erase, write and verify compiled binary:

  ./stm32loader.py -e -w -v example/main.bin

:!: Loader have bug: you must disconnect serial port after flashing and reset MCU.


{{tag>arm cortex stm32 howto uart devboard}}