Initial commit

.gitignore

@@ -0,0 +1,2 @@
+Cargo.lock
+target/

Cargo.toml

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+[package]
+name = "rvgax"
+version = "0.0.1"
+authors = [
+  "Kirbylife <kirbylife@protonmail.com>",
+]
+
+license = "MIT/Apache-2.0"
+readme = "README.md"
+repository = "https://gitlab.com/kirbylife/rvgax"
+description = """
+VGA library for Arduino UNO to use with rust-avr.
+"""
+
+build = "core_generator/build.rs"
+
+keywords = ["avr", "arduino", "uno", "vga", "vgax"]
+
+[dependencies]
+arduino = "0.1"
+
+[build-dependencies]
+avr-mcu = "0.2"

README.md

@@ -1,3 +1,3 @@
 # rVGAx
 
-VGA library for Arduino UNO to use with rust-avr.
+## WIP, DOES NOT WORK :c

src/.gitignore

@@ -0,0 +1,2 @@
+# Generated automatically.
+config.rs

src/lib (copia 1).rs

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+#![feature(llvm_asm, asm, lang_items, abi_avr_interrupt)]
+#![no_std]
+
+extern crate arduino;
+
+use core::ptr::write_volatile;
+use arduino::TCNT0;
+
+const HSYNCPIN: u8 = 3;
+
+const COLORPIN0: u8 = 6;
+const COLORPIN1: u8 = 7;
+
+const VSYNCPIN: u8 = 9;
+
+const SKIPLINES: u8 = 90;
+
+const VGAX_HEIGHT: usize = 60;
+const VGAX_BWIDTH: usize = 30;
+const VGAX_WIDTH: usize = VGAX_BWIDTH * 4;
+const VGAX_BSIZE: usize = VGAX_BWIDTH * VGAX_HEIGHT;
+const VGAX_SIZE: usize = VGAX_WIDTH * VGAX_HEIGHT;
+
+static mut afreq: u8 = 0;
+static mut afreq0: u8 = 0;
+static mut vtimer: u16 = 0;
+static mut aline: u8 = 0;
+static mut rlinecnt: u8 = 0;
+static mut vskip: u8 = 0;
+static vgaxfb: [u8; VGAX_HEIGHT * VGAX_BWIDTH] = [0; VGAX_HEIGHT * VGAX_BWIDTH];
+
+pub unsafe fn begin() {}
+
+#[no_mangle]
+pub unsafe extern "avr-interrupt" fn _ivr_timer0_compare_a() {
+    aline -= 1;
+    vskip = SKIPLINES;
+    vtimer += 1;
+    rlinecnt = 0;
+}
+
+#[no_mangle]
+pub unsafe extern "avr-interrupt" fn _ivr_timer1_compare_a() {
+    if vskip != 0 {
+        vskip -= 1;
+        return;
+    }
+
+    if rlinecnt < VGAX_HEIGHT as u8 {
+        const DEJITTER_OFFSET: u8 = 1;
+        const DEJITTER_SYNC: i8 = -2;
+
+        llvm_asm!(
+r"     lds r16, ${timer0}
+     subi r16, ${tsync}
+     andi r16, 7
+     call TL
+TL:
+     pop r31
+     pop r30
+     adiw r30, (LW-TL-5)
+     add r30, r16
+     ijmp
+LW:
+     nop
+     nop
+     nop
+     nop
+     nop
+     nop
+     nop
+LBEND:
+"
+    :
+    : "{timer0}"(&TCNT0),
+      "{offset}"(DEJITTER_OFFSET),
+      "{tsync}"(DEJITTER_SYNC)
+    : "r30", "r31", "r16"
+    : "volatile");
+    }
+}
+
+pub mod std {
+    #[lang = "eh_personality"]
+    pub unsafe extern "C" fn rust_eh_personality(
+        _state: (),
+        _exception_object: *mut (),
+        _context: *mut (),
+    ) -> () {
+    }
+
+    #[panic_handler]
+    fn panic(_info: &::core::panic::PanicInfo) -> ! {
+        loop {}
+    }
+}

src/lib.rs

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+#![feature(asm, lang_items, abi_avr_interrupt)]
+#![no_std]
+
+extern crate arduino;
+
+use arduino::{PORTD, TCNT0, TXEN0, UCSR0B, UDR0};
+use core::ptr::write_volatile;
+
+const HSYNCPIN: u8 = 3;
+
+const COLORPIN0: u8 = 6;
+const COLORPIN1: u8 = 7;
+
+const VSYNCPIN: u8 = 9;
+
+const SKIPLINES: u8 = 35;
+const EXTRACOLORPORT: *mut u8 = PORTD;
+// const SKIPLINES: u8 = 90;
+
+const VGAX_HEIGHT: usize = 80;
+const VGAX_BWIDTH: usize = 24;
+const VGAX_WIDTH: usize = VGAX_BWIDTH * 8;
+const VGAX_BSIZE: usize = VGAX_BWIDTH * VGAX_HEIGHT;
+const VGAX_SIZE: usize = VGAX_WIDTH * VGAX_HEIGHT;
+const VGAX_ECSWIDTH: usize = 3;
+
+static mut vtimer: u16 = 0;
+static mut aline: u8 = 0;
+static mut rlinecnt: u8 = 0;
+static mut vskip: u8 = 0;
+static vgaxfb: [u8; VGAX_HEIGHT * VGAX_BWIDTH] = [0; VGAX_HEIGHT * VGAX_BWIDTH];
+static mut videoline: *mut u8 = 0 as *const u8 as *mut u8;
+static vmask: u8 = 0;
+// const VGAXFBPTR: *mut u8 = vgaxfb as *mut u8;
+
+// Port pointers
+// const PORTD: *mut u8 = 43 as *mut u8;
+
+pub unsafe fn begin() {}
+
+// VSYNC
+#[no_mangle]
+pub unsafe extern "avr-interrupt" fn _ivr_timer0_compare_a() {
+    aline -= 1;
+    vskip = SKIPLINES;
+    vtimer += 1;
+    rlinecnt = 0;
+    videoline = vgaxfb.as_ptr() as *const u8 as *mut u8;
+}
+
+// HSYNC
+#[no_mangle]
+pub unsafe extern "avr-interrupt" fn _ivr_timer1_compare_a() {
+    if vskip != 0 {
+        vskip -= 1;
+        return;
+    }
+
+    if rlinecnt < VGAX_HEIGHT as u8 {
+        const DEJITTER_SYNC: i8 = -0;
+        asm!(
+"     lds r16, $0
+\t     subi r16, $1
+\t     andi r16, 7
+\t     call TL
+\tTL:
+\t     pop r31
+\t     pop r30
+\t     adiw r30, (LW-TL-5)
+\t     add r30, r16
+\t     ijmp
+\tLW:
+\t     nop
+\t     nop
+\t     nop
+\t     nop
+\t     nop
+\tLBEND:
+\t"
+                :
+                : "i"(&TCNT0),
+                  "i"(DEJITTER_SYNC)
+                : "r30", "r31", "r16", "r17"
+                : "volatile");
+    }
+
+    fn bit(n: u8) -> u8 {
+        1 << n
+    }
+    unsafe fn nop() {
+        asm!("nop");
+    }
+
+    static mut p: *mut u8 = videoline;
+    static mut c: *mut u8 = p.add(1) as *const u8 as *mut u8;
+    fn drawF() {
+        unsafe {
+            write_volatile(UDR0, c as u8);
+            write_volatile(UCSR0B, bit(TXEN0));
+            c = p.add(1) as *const u8 as *mut u8;
+            nop();
+        }
+    }
+    fn drawS() {
+        unsafe {
+            write_volatile(UDR0, c as u8);
+            write_volatile(EXTRACOLORPORT, vmask);
+            for _ in 0..7 {
+                nop();
+            }
+            c = p.add(1) as *const u8 as *mut u8;
+        }
+    }
+    fn draw8() {
+        unsafe {
+            write_volatile(UDR0, c as u8);
+            for _ in 0..12 {
+                nop();
+            }
+            c = p.add(1);
+        }
+    }
+}
+
+pub mod std {
+    #[lang = "eh_personality"]
+    pub unsafe extern "C" fn rust_eh_personality(
+        _state: (),
+        _exception_object: *mut (),
+        _context: *mut (),
+    ) -> () {
+    }
+
+    #[panic_handler]
+    fn panic(_info: &::core::panic::PanicInfo) -> ! {
+        loop {}
+    }
+}