https://www.xiao93.com/2015/09/Recent content in 09 on David XiaoHugo -- gohugo.ioen-gbWed, 23 Sep 2015 20:19:48 +0100https://www.xiao93.com/2015/09/dsp-filtering/Wed, 23 Sep 2015 20:19:48 +0100https://www.xiao93.com/2015/09/dsp-filtering/The Nucleo STM32F334 As part of my Internship in 2015, I was asked to create a small prototype that could take in two stereo audio signals and output a single stereo audio signal. The prototype was based upon a Nucleo STM32F334 as that was what we had at hand. The prototype Very quickly I was able to create a prototype that was able to mix the two input stereo signals in a linear way.https://www.xiao93.com/2015/09/cities-unlocked-pcb/Tue, 22 Sep 2015 20:53:31 +0100https://www.xiao93.com/2015/09/cities-unlocked-pcb/After creating the DSP mixing filter during my internship in 2015, I was then tasked with helping the development of a firmware of a PCB from a project called Cities Unlocked. The prototype PCB to program I was given a version of the firmware that was “hacked together” according to my team’s leader Alistair Wharton. The PCB had a small ARM processor, a Bluetooth module and an IMU package that contained a compass, gyroscope and accelerometer sensors as well as built in fusion modes where more accurate readings from the IMU were generated.https://www.xiao93.com/2015/09/cities-unlocked-test-application/Mon, 21 Sep 2015 21:43:51 +0100https://www.xiao93.com/2015/09/cities-unlocked-test-application/During my internship in 2015, I also worked on a Windows Phone application that was created to test all of the capabilities of the PCB firmware that I was also working on. More details about the actual PCB can be found here here. The prototype PCB to communicate with Screenshot of application The PCB and the application communicated over the Bluetooth serial connection.