In the past, when organizing the code, all peripherals, such as ports, timers, serial ports, etc., were initialized when the system clock was initialized.
Today I had a sudden idea to put the initialization of each peripheral into the module of each peripheral, so that unused peripherals do not need to be given clocks, thus reducing energy consumption.
Just like that, the problem arises: there is no waveform output during PWM output.
I repeatedly checked and compared the timer's function module configuration, output IO settings, RCC configuration, etc., but I still couldn't find the cause.
When I was about to give up, I scanned the code intermittently, and suddenly I saw that the clock for the output IO was not configured before setting the output IO code, but was configured afterwards.
Is this the problem? I tried it immediately and it turned out to be the case.
This is a wake-up call!! :)
Therefore, you must configure the IO clock before configuring the output IO, remember this!
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