I have recently bought the CJMCU-407, but I'm not able to let any LED blink... does anyone can help me out there?
Hey,thank you for your answere. But, if I define everything for let that LED blink, nothing happens. Are there more than one connected? The LED next to the OTG-power supply is always enlighted, even if the chip is blank.
Where did you got that information from? Is there any datasheet for that board? I haven't found one, neither the factory.
Btw. maybe I'm wrong but this shall do the blinking start? *attached*
Look at the picture you gave, it's connected to pin 97.
Try to exercise it in the debugger - after having enabled GPIOE clock in RCC, set GPIOE_MODER bit 0, then toggle GPIOE_ODR bit 0. Measure output voltage directly on the pin.
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