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Goal

Be able to receive UART data from SCuM even when clock calibration isn’t perfect.

Steps

• groundwork

  • create a repository for your source code at https://github.com/orgs/PisterLab/teams

  • Take 2x nRF52840-DK boards, connect GND and 2 pins for UART TX/RX

  • program the board so one sends bytes to the second

  • play with the BAUDRATE register, make sure you can change the baudrate

  • use a scope to make sure the timing makes sense

• feasibility

  • change the the BAUDRATE register to values not listed in the “approved” list in the Product Specification

  • check whether timing makes sense with a scope

  • check UART still work

  • the goal is that you can change the baudrate for the UART to any baurate you can

  • if this doesn’t work, project stops here

• learning baudrate

  • set pins as GPIOs

  • use a clock to sample transition times

  • calculate baudrate

  • set pins as UART

  • receive bytes!