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epd-waveshare
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Improved Documentation of 2nd example

embedded-hal-1.0
Christoph Groß 7 years ago
parent
4c704a3af5
commit
a40cda8756
1 changed files with 36 additions and 31 deletions
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  1. 67
      examples/embedded_linux_epd1in54/src/main.rs

67
examples/embedded_linux_epd1in54/src/main.rs
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@ -27,10 +27,12 @@ use lin_hal::Delay;
extern crate embedded_hal;
use embedded_hal::digital::{InputPin};
//TODO: Remove when linux_embedded_hal implements InputPin
struct HackInputPin<'a> {
pin: &'a Pin
}
//TODO: Remove when linux_embedded_hal implements InputPin
impl<'a> HackInputPin<'a> {
fn new(p : &'a Pin) -> HackInputPin {
HackInputPin {
@ -39,15 +41,16 @@ impl<'a> HackInputPin<'a> {
}
}
//TODO: make it safer?? or handle the errors better?
// now it defaults to is_low if an error appears
//TODO: Remove when linux_embedded_hal implements InputPin
// for now it defaults to is_low if an error appears
// could be handled better!
impl<'a> InputPin for HackInputPin<'a> {
fn is_low(&self) -> bool {
self.pin.get_value().unwrap_or(0) == 0
}
fn is_high(&self) -> bool {
self.pin.get_value().unwrap_or(0) == 1
!self.is_low()
}
}
@ -71,12 +74,13 @@ fn main() {
spi.configure(&options).expect("spi configuration");
// Configure Digital I/O Pin to be used as Chip Select for SPI
let cs = Pin::new(26);//BCM7 CE0
cs.export().expect("cs export");
while !cs.is_exported() {}
cs.set_direction(Direction::Out).expect("CS Direction");
cs.set_value(1).expect("CS Value set to 1");
let cs_pin = Pin::new(26);//BCM7 CE0
cs_pin.export().expect("cs_pin export");
while !cs_pin.is_exported() {}
cs_pin.set_direction(Direction::Out).expect("cs_pin Direction");
cs_pin.set_value(1).expect("cs_pin Value set to 1");
// Configure Busy Input Pin
let busy = Pin::new(5);//pin 29
busy.export().expect("busy export");
while !busy.is_exported() {}
@ -84,35 +88,36 @@ fn main() {
//busy.set_value(1).expect("busy Value set to 1");
let busy_in = HackInputPin::new(&busy);
// Configure Data/Command OutputPin
let dc = Pin::new(6); //pin 31 //bcm6
dc.export().expect("dc export");
while !dc.is_exported() {}
dc.set_direction(Direction::Out).expect("dc Direction");
dc.set_value(1).expect("dc Value set to 1");
// Configure Reset OutputPin
let rst = Pin::new(16); //pin 36 //bcm16
rst.export().expect("rst export");
while !rst.is_exported() {}
rst.set_direction(Direction::Out).expect("rst Direction");
rst.set_value(1).expect("rst Value set to 1");
// Configure Delay
let delay = Delay {};
// Setup of the needed pins is finished here
// Now the "real" usage of the eink-waveshare-rs crate begins
//TODO: wait for Digital::InputPin
//fixed currently with the HackInputPin, see further above
let mut epd = EPD1in54::new(spi, cs, busy_in, dc, rst, delay).expect("eink inialize error");
let mut epd = EPD1in54::new(spi, cs_pin, busy_in, dc, rst, delay).expect("eink inialize error");
let mut buffer = [0u8, epd4in2.get_width() / 8 * epd4in2.get_height()];
let mut buffer = [0u8, epd.get_width() as u8 / 8 * epd.get_height() as u8];
//let mut buffer = [0u8; 15000];
// draw something
let mut graphics = Graphics::new(400, 300, &mut buffer);
let mut graphics = Graphics::new(200, 200, &mut buffer);
graphics.clear(&Color::White);
graphics.draw_line(0,0,400,300, &Color::Black);
graphics.draw_line(0,0,200,200, &Color::Black);
graphics.draw_filled_rectangle(200,200, 230, 230, &Color::Black);
graphics.draw_line(202,202,218,228, &Color::White);
@ -125,30 +130,30 @@ fn main() {
graphics.draw_vertical_line(200, 50, 200, &Color::Black);
epd4in2.update_and_display_frame(graphics.get_buffer()).expect("display and transfer error");
epd.update_and_display_frame(graphics.get_buffer()).expect("display and transfer error");
epd4in2.delay_ms(3000);
epd.delay_ms(3000);
epd4in2.clear_frame().expect("clear frame error");
epd.clear_frame().expect("clear frame error");
//Test fast updating a bit more
let mut small_buffer = [0x00; 128];
let mut circle_graphics = Graphics::new(32,32, &mut small_buffer);
circle_graphics.draw_circle(16,16, 10, &Color::Black);
epd4in2.update_partial_frame(circle_graphics.get_buffer(), 16,16, 32, 32).expect("Partial Window Error");
epd4in2.display_frame().expect("Display Frame Error");
epd.update_partial_frame(circle_graphics.get_buffer(), 16,16, 32, 32).expect("Partial Window Error");
epd.display_frame().expect("Display Frame Error");
epd4in2.update_partial_frame(circle_graphics.get_buffer(), 128,64, 32, 32).expect("Partial Window Error");
epd4in2.display_frame().expect("Display Frame Error");
epd.update_partial_frame(circle_graphics.get_buffer(), 128,64, 32, 32).expect("Partial Window Error");
epd.display_frame().expect("Display Frame Error");
epd4in2.update_partial_frame(circle_graphics.get_buffer(), 320,24, 32, 32).expect("Partial Window Error");
epd4in2.display_frame().expect("Display Frame Error");
epd.update_partial_frame(circle_graphics.get_buffer(), 320,24, 32, 32).expect("Partial Window Error");
epd.display_frame().expect("Display Frame Error");
epd4in2.update_partial_frame(circle_graphics.get_buffer(), 160,240, 32, 32).expect("Partial Window Error");
epd4in2.display_frame().expect("Display Frame Error");
epd.update_partial_frame(circle_graphics.get_buffer(), 160,240, 32, 32).expect("Partial Window Error");
epd.display_frame().expect("Display Frame Error");
epd4in2.delay_ms(3000);
epd.delay_ms(3000);
@ -157,9 +162,9 @@ fn main() {
graphics.draw_string_8x8(16, 16, "hello", &Color::Black);
graphics.draw_char_8x8(250, 250, '#', &Color::Black);
graphics.draw_char_8x8(300, 16, '7', &Color::Black);
epd4in2.update_and_display_frame(graphics.get_buffer()).expect("display and transfer error");
epd.update_and_display_frame(graphics.get_buffer()).expect("display and transfer error");
epd4in2.delay_ms(3000);
epd.delay_ms(3000);
epd4in2.sleep().expect("sleeping error");
epd.sleep().expect("sleeping error");
}

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