STM32F030F4P6 - Waterproof DS18B20 Temperature Sensor скачать в хорошем качестве

STM32F030F4P6 - Waterproof DS18B20 Temperature Sensor

The STM32F030F4P6 is a cheap and compact 32-bit ARM Cortex-M0 microcontroller from STMicroelectronics. It is pretty limited in terms of resources, offering only 4 KB of SRAM and 16 KB of Flash. Its peripheral set is fairly minimal too. Because of that, it is best suited for small, focused projects where tight constraints are not a deal-breaker. At first glance, this project might look like a simple DS18B20-based thermometer. However, there is a lot more going on under the code. Three key challenges show up right away. First, printing floating-point values with sprintf quickly leads to stack overflow due to the device’s tight memory constraints. Second, the HAL library does not provide a built-in microsecond delay function, which is essential for the one-wire protocol used by the DS18B20 as well as software I2C protocol. And third, the one-wire line needs fast pin toggling, so the GPIO has to be controlled through direct register access rather than standard HAL calls. On top of that, the I²C LCD library adds another layer of complexity since it can operate over either hardware or software I²C. Software I²C, of course, also requires precise microsecond timing. To handle microsecond delay timing cleanly, a dedicated hardware timer is used to generate accurate such tiny delays. Finally, instead of relying on stdio or string libraries, floating-point values are displayed through a lightweight LCD-printing routine that converts numbers to character arrays efficiently and fits comfortably within the device’s limited memory. If you are into microcontroller projects, learning-by-building, and practical electronics, this one’s for you. 👍Don’t forget to like, subscribe, and drop your questions or ideas in the comments. I’d love to hear what you think! https://github.com/sshahryiar/STM32-P...   / microarena     / microarena   #C #STM32F030F4P6 #STM32F0Series #STMIcroelectronics #32bitMicrocontroller #DallasSemiconductor #Temperature #DS18B20 #OneWireProtocol #I2C #TWI #PCF8574 #EmbeddedSystems #STM32 #HAL #ARM #ARMMicrocontroller #Timer #Float #STDIO #LCD