Use stm32f105 as a USB host to read and write USB disks. The USB interface circuit is as shown below, but I don't know if this is feasible? If it is feasible, how should GPIO be initialized? (When I t
I use RS232 as the download cable, but I don't know what's wrong. It keeps saying that it can't connect. What signals are related to the ISP download program? Is it related to PSEN or the clock signal
[size=4]Capacitors have a charging and discharging time problem. When the positive half cycle of the alternating current charges the capacitor, current flows through the circuit, which is equivalent t