In the previous post I started a mini-series dedicated to the built-in RTC in STM32 chips. I began with probably the most popular microcontroller SMT32F103 found among others in the cheap BluePill board. I got to the point where after resetting the microcontroller the time was still correct, but the date started from zero.
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STM32 microcontrollers undoubtedly have many killer features. Of course, compared to the ancient AVRs that are still used in the most popular Arduino Uno. One of those things is that STMs have a built-in real-time clock, RTC for short. Let me show you in detail what working with such a clock looks like using the HAL library generated by CubeMX.
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In the last article I described the adventures related to the original API provided for the laser distance sensor VL53L0X. I got to the point where I managed to run a single measurement. However, I’d like to relieve the microcontroller a bit so it doesn’t have to wait so long for the measurement to finish. The sensor has an interrupt output pin, so why not use it?
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Anyone who has spent even a moment dealing with robotics knows that distance measurement plays an incredibly important role in this field. Practically everywhere we deal with devices that move, some kind of obstacle detection is advisable. This is often implemented by measuring distance.
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Not long ago I wrote an article about how to implement UART reception via DMA. I successfully wrote such a “hands-free” implementation for STM32F411. Many of my readers also use cheap boards with F103 and porting the library caused huge problems. I adapted my code and I will show you what the differences were and the potential difficulties.
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It’s been a while since I put together the list of eight best IDEs for STM32. At the time of writing that article, no one publicly knew what was about to happen. ST acquired Atollic, taking over their STM32 IDE, TrueStudio. As a result of these events we finally have something “made” by ST, namely STM32CubeIDE. So let’s see what they have to offer.
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Lately, lots of people have been asking me to port my code to STM32F103C8T6. I’m reluctant to take on this task because HAL is fairly easy to port. Besides, I’d like to teach programming, not copying code 🙂 There are also a few other issues I have an internal problem with when it comes to this popular board from China.
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Recently in my mailing group I asked a question about which STM32 topic interests you the most right now. I received lots of different answers, but one topic came up several times. It was receiving messages of arbitrary length from UART via DMA. If the reader wants it – I’m writing it!
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Microcontroller projects often need to measure analog signals. Unfortunately, they themselves only understand digital sequences that can take only two states. Most often, these are the ground and supply levels. To measure an analog value, you need to use an analog-to-digital converter — ADC for short. Practically every modern microcontroller is equipped with such a converter. STM32, of course, too.
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