IO development is the most basic and essential skill for beginners. Although most people think that IO operations are simple, they are not so easy for many beginners. This article summarizes some “IO port driver code writing” (including bus addresses, physical_virtual addresses, BCM2835 chip manual knowledge, etc.), hoping to be helpful to everyone. Microcomputer Bus … Read more
ESP-ADF is the official audio development framework launched by Espressif Systems for its ESP32 series chips, providing comprehensive support for audio application development. Whether it’s a simple music player or a complex voice recognition system, ESP-ADF can help you achieve it easily. 1. Introduction to ESP-ADF ESP-ADF supports various chips from Espressif Systems, including ESP32, … Read more
1. Linux Audio Architecture Diagram The quality of audio and video directly affects product experience. 2. Explanation of Audio Architecture Layers openWRT adopts the ALSA layer architecture as follows: Application: The upper layer application mainly calls the interfaces in alsa-lib to implement business logic. Use aplay, arecord, amixer, speaker-test in alsa-util for related testing. HAL … Read more