From a688d4c5eda6fcbd0008febe0370f8674254af61 Mon Sep 17 00:00:00 2001
From: finga <finga@onders.org>
Date: Sat, 5 Mar 2022 21:55:07 +0100
Subject: [PATCH] fw-rust: Show splash screen

Put assets for the splash screen into the data segment and print it.
---
 firmware/rust/src/main.rs | 83 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/firmware/rust/src/main.rs b/firmware/rust/src/main.rs
index f7e5bda..a5abd86 100644
--- a/firmware/rust/src/main.rs
+++ b/firmware/rust/src/main.rs
@@ -16,6 +16,51 @@ use embedded_hal::{
 use nb::block;
 use panic_halt as _;
 
+// TODO: Use https://github.com/rust-lang/rust/issues/85077 when stabilized
+static SACRED_CHAO: [[u8; 40]; 5] = [
+    [
+        0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF0, 0xF8, 0xFC, 0xFC, 0xFE, 0xFE, 0xFE,
+        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xFE, 0xFC, 0xFC,
+        0xF8, 0xF0, 0xF0, 0xE0, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00,
+    ],
+    [
+        0x80, 0xF0, 0xFC, 0xFE, 0xFF, 0xFF, 0x7F, 0x3F, 0x1F, 0x3F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF,
+        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0x0F, 0x0F, 0x07, 0x07, 0x07, 0x03, 0xC3,
+        0xE3, 0x73, 0x37, 0x17, 0x07, 0x0F, 0x1E, 0x3C, 0xF0, 0x80,
+    ],
+    [
+        0xFF, 0xFF, 0xFF, 0xE7, 0xC3, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F, 0x00, 0x00, 0xFC, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF,
+        0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFC, 0x30, 0x00, 0x00, 0xFF,
+    ],
+    [
+        0x01, 0x0F, 0x3F, 0x4F, 0x9F, 0x3F, 0x3E, 0x3C, 0x7C, 0x7C, 0x7C, 0x7C, 0x3E, 0x3E, 0x3E,
+        0x1F, 0x1F, 0x0F, 0x07, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x07, 0x07, 0x0F, 0x0F, 0x0F,
+        0x0F, 0x0F, 0x07, 0x07, 0x03, 0x81, 0x40, 0x30, 0x0E, 0x01,
+    ],
+    [
+        0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x08, 0x08, 0x10, 0x20, 0x20, 0x40, 0x40, 0x40,
+        0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x40, 0x40, 0x40, 0x20, 0x20,
+        0x10, 0x08, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
+    ],
+];
+
+// TODO: Use https://github.com/rust-lang/rust/issues/85077 when stabilized
+static ONDERS_ORG: [[u8; 48]; 2] = [
+    [
+        0xE0, 0x60, 0xE0, 0x00, 0x00, 0xE0, 0x60, 0xE0, 0x00, 0x00, 0xE0, 0x60, 0xF8, 0x00, 0x00,
+        0xE0, 0xA0, 0xE0, 0x00, 0x00, 0xE0, 0x20, 0x60, 0x00, 0x00, 0xE0, 0xA0, 0xA0, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0xE0, 0x60, 0xE0, 0x00, 0x00, 0xE0, 0x20, 0x60, 0x00, 0x00,
+        0xE0, 0x60, 0xE0,
+    ],
+    [
+        0x03, 0x02, 0x03, 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00, 0x03, 0x02, 0x03, 0x00, 0x00,
+        0x03, 0x02, 0x02, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x03, 0x00, 0x00,
+        0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x02, 0x03, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
+        0x0B, 0x0A, 0x0F,
+    ],
+];
+
 #[atmega_hal::entry]
 fn main() -> ! {
     // Disable interrupts when initializing
@@ -99,6 +144,44 @@ fn main() -> ! {
         lcd_cd.set_low();
     }
 
+    // Draw sacred chao
+    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();
+
+        // TODO: This delay fixes issues, try find a better solution
+        delay.delay_ms(1_u8);
+        lcd_cd.set_high();
+
+        for segment in page {
+            block!(spi.send(*segment)).unwrap();
+        }
+
+        // TODO: This delay fixes issues, try find a better solution
+        delay.delay_ms(1_u8);
+        lcd_cd.set_low();
+    }
+
+    // Draw onders.org
+    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();
+
+        // TODO: This delay fixes issues, try find a better solution
+        delay.delay_ms(1_u8);
+        lcd_cd.set_high();
+
+        for segment in page {
+            block!(spi.send(*segment)).unwrap();
+        }
+
+        // TODO: This delay fixes issues, try find a better solution
+        delay.delay_ms(1_u8);
+        lcd_cd.set_low();
+    }
+
     // Enable interrupts
     unsafe { interrupt::enable() };