Posted on October 01, 2015 at 13:33
Thanks for the help in advanced! #stm32f4 #stm32f4 #swoproblems #swoproblems #vcap #vcap
Hello there!
I've desingned a board for a project with a newSTM32F429VGT6 controller. My main problem is that I cannot program t
he controller, ST-Link says it ''can not connect to target''. Of course, I've already checked, the controller gets 3.3V, and the SWO pinout is also good.
I went through the datasheet again, and I I've found out, that on the Vcap1,2 pins I should measure around 1.2V. But I'm only getting some mV. I'm using 2.2uF capicators, with low ESR value. I have no idea what causes the problem, and at this point I'm pretty much stucked... :(I've attached my board pinout, maybe it helps.Thanks for the help in advanced! #stm32f4 #stm32f4 #swoproblems #swoproblems #vcap #vcap
Posted on October 06, 2015 at 10:50
As you see, the VDDA pin is not quite connected to 3.3V, and this way PDR/POR circuit could not start the controller.Now that I've found what caused the problem, I can finally program the board! :)Hopefully, this post helps somebody in the feature if he/she struggles with the some problem.
Hello guys!
First of all, thanks for all the help! I very much appreciate your time in helping me.I went through the hardware design again, checked the schematics, and I've found a quite embarrassing error, which caused all the Vcap problems and the programming errors:As you see, the VDDA pin is not quite connected to 3.3V, and this way PDR/POR circuit could not start the controller.Now that I've found what caused the problem, I can finally program the board! :)Hopefully, this post helps somebody in the feature if he/she struggles with the some problem.
