title: Reading PWM signals in STM32F407
body: <p>I am doing a quadcopter using a STM32F407 discovery. I was finally able to stabilize it. Now i am trying to use the RC receiver so i can control my quadcopter movements. Is there a way to read the signal of PWM of my RC receiver channels ?? 
  Also my RC receiver supports PPM and according to what i understand it receives a packet of duty cycles strong textbut still don't know how to receive this.</p>