On which pins of CJMCU-407 is a LED connected?

[Christopher Schael]

Posted on May 18, 2017 at 17:34

Hey,

I have recently bought the CJMCU-407, but I'm not able to let any LED blink... does anyone can help me out there? 

#stm32f4 #cjmcu #pin-map

[Tesla DeLorean]

Posted on May 18, 2017 at 18:56

PE0

[Christopher Schael]

Posted on May 19, 2017 at 09:57

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*

________________ Attachments : blink.txt.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006Hyf4&d=%2Fa%2F0X0000000bAg%2FLrwnZnk643wfAEaWJoKCThuy._vlEKmKQFtHUzTEndc&asPdf=false

[waclawek.jan]

Posted on May 19, 2017 at 10:05

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.

JW