[−][src]Trait vga_framebuffer::Hardware
Implement this on your microcontroller's timer object.
Required methods
fn configure(&mut self, mode_info: &ModeInfo)
Called at start-up to configure timer.
The timer must be periodic, with period width
, which is measured
clock ticks (or VGA pixels), assuming the given clock rate. If you
have a clock that runs at half the given rate, then double the given
values.
You will receive calls to write_pixels
as pixels are generated. Do
not emit any pixels until the line_start
timer elapses (store them
in a FIFO).
The H-Sync pin must rise at the start of the loop and fall after
sync_end
clock ticks. We don't control it here because that would
add too much latency - you must change the H-Sync GPIO pin early in
the ISR yourself.
V-Sync is controlled by the current line number; you should implement
vsync_on
and vsync_off
which this code will call at the
appropriate time.
fn vsync_on(&mut self)
Called when V-Sync needs to be high.
fn vsync_off(&mut self)
Called when V-Sync needs to be low.
fn write_pixels(&mut self, xrgb: XRGBColour)
Called word by word as pixels are calculated