Daily Archive: January 22, 2015

How to properly set clock speed for STM32F4xx devices 67

How to properly set clock speed for STM32F4xx devices

I see that you have problems with your devices when you don’t know even (and you don’t even ask) on which speed your device is actually running. Speed of your device depends on PLL settings or clock source you have selected for system core clock. In most cases system core clock’s source is┬áPLL output. To get proper value, you check ALWAYS first these settings when something is not working. Because I’m tired of questions that something is not working but...