Page Comparison

Data Storage:

• Onboard W25Q64 nonvolatile flash memory chip (https://www.winbond.com/resource-files/w25q64jv%20revj%2003272018%20plus.pdf)
• 32768 256 byte pages to work with
• Need software to manage how flight data is stored
  • multiple flights, record keeping, way of pulling data off of SPICA afterwards
• low level access implemented here → https://github.com/nimaltd/w25qxx (make sure to leave the license in)

Flight Logic:

• When do we arm the board after starting up?
  • do we wait for a button?
    • might need to enable GPIO interrupts https://stackoverflow.com/questions/40057581/stm32f3-discovery-implement-gpio-interrupt
      • this can also be done in STM32Cube
  • do we wait until the rocket is tipped up?
• Do we always record data as fast as possible?
  • low power mode for on the pad and landed?
• When do we calibrate sensors? (e.g. the IMU)
• What do we do when we land?
• Testing modes
  • deployment testing
  • full simulation
  • heartbeat check

Data Interpretation:

• Calculate heading, acceleration vector relative to heading, altitude, latitude, longitude
  • kalman filter w/ altimeter and accelerometer
  • try and determine accurate lat. long.
    • dead reckoning w/ IMU
    • filter with GPS data?
• What do we send to the ground?
  • Everything?
  • Just raw sensor data?
  • Interpreted data too?
• Look for flight events
  
  • boost phase
  • coast phase
  • apogee
    • kalman filter z-velocity = 0
    • nose over
  • landing
  • unsafe events
    • tip over at high velocity
    • any way to correct?
      • blow all chutes?