not working
sd card starting to work again
1st motor working
Motors working, prepared for SPI refactoring
5kHz too fast for L293, using 500Hz
new SPI working (almost)
OLED working, LED's still having some problems
LED's working
Added font for OLED display.
Prepared for SPI sharing
Everything working
HC-SR04 working in one pin mode with IRQ
hc sr-04 working reliable
dual oled working
SysTick timers working.