Reminder: This article briefly reviews the relevant knowledge points of EXTI and NVIC, analyzing the external interrupt callback mechanism of the STM32F1 series microcontroller. Before we start, let’s review some knowledge related to EXTI and NVIC: External Interrupt/Event Controller (EXTI) For interconnect products (series 105, 107), the external interrupt/event controller consists of 20 edge detectors … Read more
For STM32, from previous learning, we can know that STM32 refers to the 32-bit microcontroller developed by STMicroelectronics. Today we will learn about the EXTI of STM32. 1. Introduction to EXTI EXTI (External interrupt/event controller) manages the 20 interrupt or event lines of the controller. Each interrupt or event line corresponds to an edge detector, … Read more
1.Overview of Poly Dimethyl Diallyl Ammonium Chloride (PDDAC） Poly Dimethyl Diallyl Ammonium Chloride (PDDAC) is an important cationic monomer known for its high purity, polymer grade, and high charge density. It has a wide range of applications across various fields, including water treatment, textiles, papermaking, and oilfield additives. 2.Basic Properties and Application Areas of PDDAC … Read more
Abstract In order to simulate the moisture absorption performance of clothing fiber in textiles, an experimental platform that can manipulate and observe mesoscopic liquid was designed. This experimental platform can compile an executable program and upload it to Arduino development board to control the pulse signal of stepper motor, and then make the stepper motor … Read more