random things I made and things I learnt making them
Designing the sequencer Previous Post So whats next? Well we need some way to set the steps on the sequencer. I want 16 steps per bar, each step can be illumintated by the user, with an ability to set the note (and the duration). The sequencer runs through the individual steps at a given tempo,…
Recap Previous post Previously I made the plan to design a sequencer for the original Novation BassStation. This would work by switching the connections on the ribbon cable that connected the keyboard to the motherboard. I mapped out the signal on the ribbon cable, now I needed to decide how to multiplex these signals electronically.…
Intro I just scored this original Novation BassStation synth on Ebay. It's a hybrid synth that uses digital timing control courtesy of an MCU (Panasonic MN1883217) to control two analog oscilators. Legend tells that it has a richer sound than the rack mounted version. Well, i'm not qualified to verify such claims, but it is…
So you have the discovery kit and you have run the example image on the SD card. But how do you build an OpenSTLinux image from scratch with Yocto, using a device tree file file generated by STM32CubeIDE? We will go through the build chain setup, the device tree configuration and the build process. There…
This is a completed version of the What I wish I’d known about Yocto Project page in the Yocto documentation. 1. Deal with corporate proxies Use environment variables or ChameleonSocks. https://wiki.yoctoproject.org/wiki/Working_Behind_a_Network_Proxy 2. Add a package to an image To add a package to your image using the local configuration file, use the IMAGE_INSTALL variable with…
1. Incorrect use of getVar in xserver-xf86-config_0.1.bbappend…
Using Dynamic Debug (debugfs) Check dynamic debug option is enabled in the kernel build…
Designing the hardware This project repurposes the power supply units (PSU) found in datacentre servers. The PSU are very powerful (12V @ 600W), efficient and compact. They are useful for charging LIPO batteries (with some modification) and running brushless motors or any circuit that draws large amounts of current. These PSU are replaced in industry…
Case 1 The original C code:…
Hardware Design Brief The purpose of this project is to design, build a programmable guitar FX pedal using a Cortex-M4F micro and I2S. This will provide a platform for development and experimentation of DSP algorithms and techniques. This is also an experiment to use C++ in embedded development. Evaluating the 24bit ADC and DAC Digilent…