# LED Face Mask

Yep, it's gonna be awesome!



# Configuration

* Hardware:
  * STM32F429I-DISC1 Board
    * Contains STM32F429ZIT MCU
  * 8 x 8 WS2812B LED Array

* Software:
  * The WS2812B Datasheet says it uses "NZR" communication for data, which, I have no idea what that is and DuckDuckGo can't find anything on it
  * Using SPI in order to send the data fast enough
    * SPI Setup:
      * Mode: Transmit Only Master
      * Data size of 8 bits
      * Most Significant Bit (MSB) first, as that would be the most straightforward
      * Rate of 2.5 Mbit/sec, as that would allow for 400 nanosecond pulse widths
      * Clock Polarity: Don't Care
      * Clock Phase: Don't Care
      * Will NOT be using the SPI Clock signal, as the WS2812B LEDs do not need it
      * Global Interrupt: Enabled
  * For switching LED designs:
    * Using TIM6 as a "cooldown" to not have it switch the design hundreds of times on a single button-press
      * While in "cooldown" state, LEDs will be off, to signify that the button press has been received and the LED design will be changed
      * TIM6 is using APB1, which the timer clocks are set at 80 MHz
      * "Cooldown" time of 0.5 seconds is desired:
        * 80000000 Hz * 0.5 seconds = 40000000 clock cycles
      * TIM6 Configuration:
        * One Pulse Mode: Enabled
        * Prescaler: 4000
        * Counter Mode: Up
        * Counter Period: 10000
        * Auto-Reload Preload: Enabled
        * Trigger Event Selection: Reset (UG bit from TIMx_EGR)
        * Global Interrupt: Enabled



# Resources/Credits