Monthly Archives: June 2020

ARM:0017 – go to sleep clock

This is a “gamers” clock. It sits near the monitor and shows the real time and time computer is on. This is achieved using USB as power supply. Also, the same USB port is used to set the clock. Battery … Continue reading

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ARM:0016 STM32CubeMX – problems with RTC

This is a very short message about proper initialization of RTC (real time clock). There is one trick designed in HAL and in several internet resources it is wrongly described. Proper RTC init: Find “MX_RTC_Init(void)“, scroll to “USER CODE BEGIN … Continue reading

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ARM:0015 STM32CubeMX screen libraries, part 2

Continued from Part 1. There are lots of different LCD or OLED screens in the market. Typically, it is possible to define 3 types of screens according to interface type: I2C, SPI and parallel data bus. There are also analog … Continue reading

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ARM:0014 STM32CubeMX libraries for sensors and screens

In fact, any new program written for MCU is only copy-paste from older projects. Not real copy paste, but using the same libraries and subroutines. For some upcoming bigger project, I decided to use STM32 microcontroller, this means, I need … Continue reading

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ARM:0013 STM32CubeMX – USB HID keyboard

Now we will build a USB keyboard. This project is based on STM32CubeMX canned example, HID mouse (see previous article). But we will change mouse to keyboard. Both devices are from the same HID class. First we need to change … Continue reading

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ARM:0012 STM32CubeMX – USB HID mouse

Next canned project for STM32F103 MCU using the cube- USB HID mouse. HID (human interface device) means it is the standard device compatible with all computers with USB ports. STM32CubeMX has all device descriptors and init procedures already built in. … Continue reading

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ARM:0011 STM32CubeMX – Pin interrupts

Next tutorial- interrupts, keyboard (PS2 input) and USB COM port. I have a small keyboard in my stash. It was from some flop device made by Amstrad. This keyboard has a 4 pin connector and I had hoped that it … Continue reading

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ARM:0009a – bug in CubeMX makefile

First you generate code, then you regenerate code, do make and… > “make.exe” all make.exe all -C .. make.exe[1]: Entering directory ‘F:/MyDoks/elektronika/ARM/daiktas-cube/SINGLE_UART’ Makefile:118: *** missing separator. Stop. make.exe[1]: Leaving directory ‘F:/MyDoks/elektronika/ARM/daiktas-cube/SINGLE_UART’ make.exe: *** [makefile:3: all] Error 2 > Process Exit … Continue reading

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