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fw-rust: Create Lcd struct to handle the screen
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To improve screen handling create the `Lcd` struct and implement some
first helper functions.
This commit is contained in:
finga 2022-03-12 18:11:58 +01:00
parent 518f113cc0
commit de8f789e63
1 changed files with 111 additions and 63 deletions
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134
firmware/rust/src/main.rs
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@ -5,7 +5,7 @@ use atmega_hal::{
clock::MHz8,
delay::Delay,
pins,
port::{mode::Output, Pin, PB0},
port::{mode::Output, Pin, PB0, PB1},
spi::{DataOrder, SerialClockRate, Settings, Spi},
Peripherals,
};
@ -68,78 +68,134 @@ const ONDERS_ORG: [[u8; 48]; 2] = [
],
];
fn clear_screen(spi: &mut Spi, cd: &mut Pin<Output, PB0>) {
pub struct Lcd {
spi: Spi,
cd: Pin<Output, PB0>,
rst: Pin<Output, PB1>,
}
impl Lcd {
fn init(&mut self, contrast: u8) {
let mut delay = Delay::<MHz8>::new();
// TODO: Test if delay is really needed
delay.delay_ms(1_u8);
self.rst.set_high();
// TODO: Try to reduce delay to a minimum
delay.delay_ms(1_u8);
block!(self.spi.send(0x40)).unwrap(); // (6) Set Scroll Line: Display start line 0
block!(self.spi.send(0xA1)).unwrap(); // (13) Set SEG direction: SEG reverse
block!(self.spi.send(0xC0)).unwrap(); // (14) Set COM direction: Normal COM0 - COM63
// block!(spi.send(0xA4)).unwrap(); // (10) Set All Pixel On: Disable -> Set All Pixel to ON */
block!(self.spi.send(0xA6)).unwrap(); // (11) Set Inverse Display: Display inverse off
block!(self.spi.send(0xA2)).unwrap(); // (17) Set LCD Bias Ratio: Set Bias 1/9 (Duty 1/65)
block!(self.spi.send(0x2F)).unwrap(); // (5) Set Power Control: Booster, Regulator and Follower on
block!(self.spi.send(0x27)).unwrap(); // (8) Set VLCD Resistor Ratio: Set Contrast
// block!(spi.send(0xEE)).unwrap(); // (18) Reset Cursor Update Mode
block!(self.spi.send(0x81)).unwrap(); // (9) Set Electronic Volume: Set Contrast
block!(self.spi.send(contrast)).unwrap(); // (9) Set Electronic Volume: Set Contrast
// block!(spi.send(0xFA)).unwrap(); // (25) Set Adv. Program Control 0: Set Temperature compensation curve to -0.11%/°C
// block!(spi.send(0x90)).unwrap(); // (25) Set Adv. Program Control 0: Set Temperature compensation curve to -0.11%/°C
block!(self.spi.send(0xAF)).unwrap(); // (12) Set Display Enable: Display on
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
}
fn move_cursor(&mut self, segment: u8, page: u8) {
assert!(segment < 102);
assert!(page < 8);
block!(self.spi.send(0x0F & segment)).unwrap();
block!(self.spi.send(0x10 + (segment >> 4))).unwrap();
block!(self.spi.send(0xB0 + page)).unwrap();
}
fn clear(&mut self) {
let mut delay = Delay::<MHz8>::new();
for page in 0..8 {
block!(spi.send(0x00)).unwrap();
block!(spi.send(0x10)).unwrap();
block!(spi.send(0xB0 + page)).unwrap();
self.move_cursor(0, page as u8);
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_high();
self.cd.set_high();
for _ in 0..102 {
block!(spi.send(0x00)).unwrap();
block!(self.spi.send(0x00)).unwrap();
}
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_low();
self.cd.set_low();
}
}
fn draw_splash(spi: &mut Spi, cd: &mut Pin<Output, PB0>) {
clear_screen(spi, cd);
fn screen(&mut self, screen: &Screens) {
self.clear();
match screen {
Screens::Splash(splash) => splash.draw(self),
}
}
}
pub trait Draw {
fn draw(&self, lcd: &mut Lcd);
}
struct SplashScreen;
impl Draw for SplashScreen {
fn draw(&self, lcd: &mut Lcd) {
let mut delay = Delay::<MHz8>::new();
for (i, page) in SACRED_CHAO.iter().enumerate() {
block!(spi.send(0x0F)).unwrap();
block!(spi.send(0x11)).unwrap();
block!(spi.send(0xB1 + i as u8)).unwrap();
lcd.move_cursor(31, 1 + i as u8);
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_high();
lcd.cd.set_high();
for segment in page {
block!(spi.send(*segment)).unwrap();
block!(lcd.spi.send(*segment)).unwrap();
}
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_low();
lcd.cd.set_low();
}
for (i, page) in ONDERS_ORG.iter().enumerate() {
block!(spi.send(0x0A)).unwrap();
block!(spi.send(0x11)).unwrap();
block!(spi.send(0xB6 + i as u8)).unwrap();
lcd.move_cursor(27, 6 + i as u8);
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_high();
lcd.cd.set_high();
for segment in page {
block!(spi.send(*segment)).unwrap();
block!(lcd.spi.send(*segment)).unwrap();
}
// TODO: This delay fixes issues, try find a better solution
delay.delay_ms(1_u8);
cd.set_low();
lcd.cd.set_low();
}
}
}
enum Screens {
Splash(SplashScreen),
}
#[atmega_hal::entry]
fn main() -> ! {
interrupt::free(|_cs| {
// Get peripherals, pins, eeprom and delay
// Get peripherals, pins and eeprom
let dp = Peripherals::take().unwrap();
let pins = pins!(dp);
let eeprom = Eeprom::new(dp.EEPROM);
let mut delay = Delay::<MHz8>::new();
// Get contrast and backlight from EEPROM
let contrast = eeprom.read_value(&CONTRAST);
@ -162,7 +218,7 @@ fn main() -> ! {
pins.pd5.into_output();
// Init SPI
let (mut spi, _) = Spi::new(
let (spi, _) = Spi::new(
dp.SPI,
pins.pb5.into_output(),
pins.pb3.into_output(),
@ -179,27 +235,19 @@ fn main() -> ! {
);
// Init LCD
let mut lcd_cd = pins.pb0.into_output();
let mut lcd_rst = pins.pb1.into_output();
// TODO: Test if delay is really needed
delay.delay_ms(1_u8);
lcd_rst.set_high();
// TODO: Try to reduce delay to a minimum
delay.delay_ms(5_u8);
let mut lcd = Lcd {
spi,
cd: pins.pb0.into_output(),
rst: pins.pb1.into_output(),
};
lcd.init(contrast);
block!(spi.send(0x40)).unwrap(); // (6) Set Scroll Line: Display start line 0
block!(spi.send(0xA1)).unwrap(); // (13) Set SEG direction: SEG reverse
block!(spi.send(0xC0)).unwrap(); // (14) Set COM direction: Normal COM0 - COM63
block!(spi.send(0xA6)).unwrap(); // (11) Set Inverse Display: Display inverse off
block!(spi.send(0xA2)).unwrap(); // (17) Set LCD Bias Ratio: Set Bias 1/9 (Duty 1/65)
block!(spi.send(0x2F)).unwrap(); // (5) Set Power Control: Booster, Regulator and Follower on
block!(spi.send(0x27)).unwrap(); // (8) Set VLCD Resistor Ratio: Set Contrast
block!(spi.send(0x81)).unwrap(); // (9) Set Electronic Volume: Set Contrast
block!(spi.send(contrast)).unwrap(); // (9) Set Electronic Volume: Set Contrast
block!(spi.send(0xAF)).unwrap(); // (12) Set Display Enable: Display on
// Create screen
// TODO: This should use volatile and probably be somehow globally accessible
let screen = Screens::Splash(SplashScreen);
// Draw splash screen
draw_splash(&mut spi, &mut lcd_cd);
lcd.screen(&screen);
});
#[allow(clippy::empty_loop)]