STM32_CPP_Inheritance | Example firmware to run an SSD1306 display

STM32_CPP_Inheritance is a C library typically used in Internet of Things (IoT), Arduino applications. STM32_CPP_Inheritance has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This is an example object-oriented C++ application for boards using some common STM32 microcontrollers. It uses the I2C peripheral to drive an SSD1306 monochrome OLED display. This example is intended to demonstrate how to use C++ classes and inheritence in an embedded application; each peripheral and device has its own class, and communication peripherals are derived from a common 'pIO' input/output class. One difference from C that is particularly worth noting: when you use static objects in C++, you are expected to call those objects' constructors and destructors manually, using the function pointers which the compiler places in special [pre]init_array and fini_array memory sections. The linker scripts and main method reflect this, although the destructors are never called in this example because the application is never expected to exit while the device is powered on. Currently only 128x64-pixel screens with an address of 0x78 are supported with a single timing value, but I'm hoping to change that sooner or later. The I2C peripherals are a bit different between the older F103 and the newer F303 (and F0, F4, L4, etc.) chips; I think that I've worked out how to get them running consistently on both, but the timing values are based off a mixture of guesswork and examples listed in ST's reference manuals. Fortunately, the SSD1306 is very forgiving when it comes to timings.