After the setting, click Start Trace which is a red dot.

At the ITM Stimulus Ports tick the Port 0, as the image. The write() function that needs to get configured is generated here by the IDE. In the project waiting to be configured, open up the syscalls.c file. Selected window will be appeared, then Configure Trace button. Atollic TrueSTUDIO, just like other GNU GCC compilers use the write() function, which gets called by the printf() function, to redirect the output to the desired channel (LCD, UART, CAN etc.). I expect to have the final C bootloader sources and a working project to compile it in Atollic Truestudio. Then at the start of the debug session, Window->Show View->SWV->SWV ITM Data Console must be chosen. I need a small bootloader who have to receive a firmware file (HEX encoded and encrypted) from a PC connected via USB port (already present on my project), decrypt it, flash it in the internal flash, and launch the main application (the downloaded firmware). Atollic TrueSTUDIO: Atollic TrueSTUDIO for STM32 is a flexible and extensible development and debugging IDE for STM32 MCU developers who want extremely powerful tools to aid in development of high-quality embedded software.

It miss only one USB Bootloader to upgrade the flash with the latest developed firmware. These are the software we have used for this project: 1. It is a small electronic project with an ARM cpu STM32L051 and an already developed firmware. The native GCC version of TrueSTUDIO is 6.3.1 20170215. However there is a way to extend its life: update the toolchain. For those who use TrueSTUDIO it is a pain to have to part with it. You're expected to have decent C (not C++ alike as in arduino) programming knowledge / experience, know about debugging techniques (same thing again, to get 'printf debugging', it's up to you to decide which way to go to achieve this and to figure out how to to) and so on.My project is an almost 'ready-for-production' project. TrueSTUDIO is declared obsolete by STM, which replaced it by STM32CubeIDE. using library functions, C macros or bare metal), but gives you little hints about the names of the functions / macros to use, and how to use them. Cube and Atollic provides you with all the necessary stuff to achieve this in more than one way (e.g. Now you're free to do all this on your own, you'll even have a hard time to figure out how to set the GPIO pins from your code and how make an appropriate delay to be able to see your LED blink. and provided you with a rather simple IDE and a lot of libraries that do all the basic stuff for you, just take an example and modify. With arduino someone else has done all the low level stuff, read the MCUs user manual and datasheet, made some fundamental design decisions etc.

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