Hi developer, Sorry to interrupt. I’m a beginner using Keil software and learn a few about STM32F103. I have a task or project that assignment to use STM32F103 and ultrasonic (HC-SR04). Can someone share and teach me how to use Keil and this code? Because it very hard to understand based on assembly code. Hope that is some solution or step that might help me to learn and program STM32F103. Thank you.