Although the current EDA tools are very powerful, as the PCB size requirements are getting smaller and smaller and the device density is getting higher and higher, the difficulty of PCB design is not ...
I wrote a small test program. init.s completes the hardware initialization, and main.c prints a statement using printf. When linking with arm-linux-ld, I use "-lc" to specify the link to libc.a, but a...
Hello everyone, I am a junior student and I have just started in this industry. I have learned programming, hardware knowledge, and data structures, but no teacher has ever told me what happens when I...
[i=s]This post was last edited by Electronic_Elf on 2019-5-17 16:51[/i] [p=null, 2, left] This article mainly introduces the key points of knowledge about TTL level, CMOS level, and RS232 level, and I...