Category: STM32F429 Discovery
A new library is here. 38th are external interrupts. This library allows you to very easly use external interrupts for your needs with just one function and function handler. I have written everything you need to start. For more informations on how external interrupts works on STM32F4 with pins and lines and so on, you should look at my external interrupts tutorial. I tried explain there everything as best as I can. I think it’s quite understandable. I will just...
If you work at high speed, as STM32F4 devices do (84MHz or more) then this tutorial is not right for you. But, you are able to descrease system speed to any frequency basicly you want. If you want to use delay with systick down timer, look at my library here. You can use great solution, Systick timer to make an interrups for you. But you can also decrease speed to let’s say 42Mhz, and that systick every 42ticks checks for...
BMP180 is a digital pressure sensor, with builtin temperature sensor. Its range is between 300 and 1100 hPa (0.3 to 1.1Bar). In relating to the sea level, this is +9000 to -500 meters. Sensor works with I2C communication at 100kHz. If you want sensor from ebay, here is one link. Sensor is quite bad created, because if you want to read pressure, you first need to read current temperature for pressure calculation. To read temperature you have to wait at least...
For FFT project purpose, I needed simple, really simple signal generator. I don’t have separate device at home, so I made one with STM32F4. DAC Signal library uses timer for output generation and DMA for transferring data from memory to DAC peripheral. So this library does not use processor for controlling. Everything is behind the scenes. You can use 4 different signal waves: Square Sawtooth Triangle Sinus They are simple, predefined signals. You can adjust signal frequency for specific wave. I...
With USB HID Device library, you can turn STM32F4 to be a keyboard, mouse or gamepad device. It also supports all three settings at the same time. Device is shown to computer as “Keyboard; Mouse; Game controller“. This library allows you to use 2 gamepads at the same time, one keyboard and one mouse. For mouse you can use left, middle and right buttons, X and Y cursor axes and wheel vertical rotation. For gamepads, you can implement 16 buttons...
I had enough of each time configuring PWM for some reason, so I decided to make a library for it. This library allows you to use PWM signal on all possible timers on all possible pins for timer. I made it for controling servos, but it can be used for anything else. PWM works in FAST PWM mode. You just set your PWM frequency, timer you will use, channel on timer and you are ready to go. If you need...
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