STM8S Value line - 8-bit microcontrollers Here is an opportunity to get to learn the basics of our STM8S value line Watch the video (9:07) Recommended for you. STM8 MCUs are one of the most unexplored yet efficient microcontrollers and this project aims to provide a platform. They are robust, has a lot of features and are highly economical when it comes to price. STM8 microcontrollers are 8-bit general purpose microcontrollers from STMicroelectronics (STM). This project aims to build a development board for STM8S003F3P6 (20 pin SMD) microcontroller.While the boards themselves are very cheap, an stlink is not included. For many other cheap boards these are not included. This board is actually already one of the better ones, since it has pin headers already mounted. It turned out to have an STM8S103F3P6 ♜ though. I bought one "STM8S003F3 Dev Board 5V/3.3V Power Input Onboard 3V3 Regulator" at 1.39€ including shipping. On There are lots of very cheap STM8 development boards available from China.Based on the STM8 proprietary core, the STM8S series benefits from STs 130 nm technology and advanced core The STM8s boards should now be available under the list of boards as shown in the image below. It includes an embedded debugger ST-Link, and a touch sensing button.This short tutorial presents a simple "Hello World" program for this setup, with an extra WaveShare RS232 board.The STM8S series of mainstream 8-bit microcontrollers cover a large variety of applications in the industrial, consumer, computer and mass market fields. Even though the STM8S-DISCOVERY is built around an STM8S105C6T6, it allows evaluation of the main features of all the STM8S Access line MCUs.
We used a USB-to-serial converter and gtkterm.Depending on your operating system there might be an easy way to install SDCC 3.5.0 or newer using a package system or similar (e.g. The board does have an USB connector, which can be used to power it, but it should only be used when there is no ST-Link attached.We connect the RS232 board to power pins and for data to the I/O pins (TxIN to PC3, RxOUT to PC2) the serial cable is then attached to the RS232 board.On the other end the serial cable is attached to an RS232 port on a computer running a terminal program configured for 9600 baud, no parity, 8 bits, 1 stop bit and no flow control. stm8flash, to write programs onto devices.To write our program to the board, we attach a an ST-Link/V2. The SDCC compiler, version 3.5.0 or later to compile C programs for the stm8. Element14 offers.I used a Debian GNU/Linux system, but the tutorial should work for other Linux distributions, *BSD or other Unices. Set your board type (by going to tools -> boards) to one of the STM8s boards, and go to examples (File -> examples).Buy STM8S003F3P6 - Stmicroelectronics - 8 Bit MCU, Value Line, STM8 Family STM8S Series Microcontrollers, 16 MHz, 8 KB, 1 KB, 20 Pins. Stm8S Download Link ForUsing unzip stm8flash-master.zip) change into the directory stm8flash-master and type make. To compile it, a C compiler, such as gcc, pkg-config and libusb need to be installed. In particular, SDCC 3.4.0 has an issue with the library search path this can be worked around by explicitly specifying the path to the standard library when linking.SDCC binaries or a source tarball can be downloaded from its website.The stm8flash source can be found at its GitHub location, where there is also a download link for a zip archive of the sources. While SDCC 3.4.0 should be sufficient for this tutorial, you might want to try a newer version in case you encounter any bugs. You can see the "Hello world" by attaching a serial cable to the DB9 connector on the RS232 board, and using a terminal program configured for 9600 baud, no parity, 8 bits, 1 stop bit and no flow control.Stm8flash was written by Valentin Dudouyt. /stm8flash -c stlinkv -p stm8s103f3 -w serial.ihx will write the demo onto the board. Ihx file with a name corresponding to the source file will be generated.Assuming stm8flash and serial.ihx are in the same directory, the board is attached through an stlinkv2 device. The option -mstm8 selects the target port (stm8). The stm8 backend was mostly written by Philipp Klaus Krause for his research into bytewise register allocation and spilling (see Philipp Klaus Krause, "Bytewise Register Allocation", 2015).SDCC is a C compiler that aims to be compliant with the C standards.Important compiler options for STM8 developers include: It has been extended by various contributors and more recently, incorporated some cutting-edge technologies, in particular in register allocation (see Philipp Klaus Krause, "Optimal Register Allocation in Polynomial Time", 2013). Hex as Intel hex, and other filenames as binaries.SDCC was initially written by Sandeep Dutta for the MCS-51, and has a relatively conservative architecture (see Sandeep Dutta, "Anatomy of a Compiler", 2000). Stm8flash will treat filenames ending in. The target device is selected using the -p option (to get a list of target devices, use the -p option with an option argument that is not an stm8 device, e.g. The programmer can be selected using -c stlink or -c stlinkv2. Keyboard serial port-opt-code-size for optimization for code size Variable-length arrays are not yet supported in sdcc though) -std-c99 for compilation in C99 mode (some C99 features, e.g. Higher values result in more optimized code, longer compiler runtime, and higher memory usage during compilation. The default value is 3000.
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