GitLab

Fixed WDT timeout to actually be 1s (instead of 2s)

See merge request !18

remember if we're showing some ux (the battery status, splash screen, or system status) and clear it after 15 seconds

we don't need 15 columns, as patrick georgi pointed out -- only 14. that shaves off another clock tick.

adjust loc, pressed_bit, and pressed_byte on each iteration instead of recalculating -- this saves a fair amount of inner-loop time

use the PWM timer to drive a 32KHz tick counter and interrupt, so we can go idle between 1ms keyboard scans. also separate the keyboard scan (slow) from the collecting/reporting (fast, done often).