Circuit Scribe: Draw Circuits Instantly
https://www.kickstarter.com/projects/electroninks/circuit-scribe-draw-circuits-instantly
I am quite excited when I see this support package for STM32F4Discovery Board. I want to try it on my board asap. However, I just want to share a couple of links here:
http://www.mathworks.co.uk/products/connections/product_detail/product_75144.html
http://www.st.com/web/catalog/tools/FM147/CL1794/SC961/SS1533/PF258513
Have a look at this slide especially under Timer configuration -Structures page 34/35/36.
Key things to calculate the timer frequency are :
fpwm = TIM_counter_clk/(Period+1)
TIM_counter_clk=APB1_clk/(prescaler+1)
