In embedded system development, the Linux kernel is the core of the entire system. Understanding the kernel boot mechanism not only helps developers build a complete system understanding but also plays an important role in troubleshooting boot anomalies, performance optimization, and kernel trimming. This article will systematically analyze the embedded Linux kernel boot process from … Read more
List to check for any initialization issues; set breakpoints directly if there are problems. z_prep_c dev_state_zero arch_data_copy cache_init mpu_init c_start z_sys_init_run_level arch_kernel_init z_dummy_thread_init do_device_init int_init 16650_init uart_console device_is_ready clock_driver_init switch_to_main_thread prepare_multithreading z_sched_init init_ready_q/sys_dlist_init z_setup_new_thread(Initialize main thread) z_mark_thread_as_not_sleeping z_ready_thread(main) Check thread attributes, reset timer, cache, add timeout, add to list z_init_cpu(0) init_idle_thread setup_new_thread(idle) mark_not_sleeping switch_to_main_thread z_swap_unlocked: … Read more
Kernel Boot Stage 1. bootsect stage 2. setup stage 3. head.S stage 4. main.c stage Init Stage 1. Determine User Login Mode In “/etc/inittab”, the following login modes are listed: single-user maintenance mode, multi-user without network mode, text interface multi-user mode, and X-Windows multi-user mode. The single-user maintenance mode (runlevel 1) is similar to “Safe … Read more
Click on “ Technical Training ” above and select “Pin to Top” Over 130,000 industrial control professionals follow this WeChat platform: technical sharing, learning exchanges, industrial control videos We all know that HMI touch screens may experience touch offset due to various factors such as installation or on-site environment, meaning the touch point does not … Read more