feat: add blink demo

1 files changed, 38 insertions, 0 deletions

diff --git a/demo/src/execute.ts b/demo/src/execute.ts
new file mode 100644
index 0000000..96a0411
--- /dev/null
+++ b/demo/src/execute.ts
@@ -0,0 +1,38 @@
+import { avrInstruction, AVRTimer, CPU, timer0Config } from 'avr8js';
+import { loadHex } from './intelhex';
+
+// ATmega328p params
+const FLASH = 0x8000;
+
+export class AVRRunner {
+  readonly program = new Uint16Array(FLASH);
+  readonly cpu: CPU;
+  readonly timer: AVRTimer;
+
+  private stopped = false;
+
+  constructor(hex: string) {
+    loadHex(hex, new Uint8Array(this.program.buffer));
+    this.cpu = new CPU(this.program);
+    this.timer = new AVRTimer(this.cpu, timer0Config);
+  }
+
+  async execute(callback: (cpu: CPU) => void) {
+    this.stopped = false;
+    for (;;) {
+      avrInstruction(this.cpu);
+      this.timer.tick();
+      if (this.cpu.cycles % 50000 === 0) {
+        callback(this.cpu);
+        await new Promise((resolve) => setTimeout(resolve, 0));
+        if (this.stopped) {
+          break;
+        }
+      }
+    }
+  }
+
+  stop() {
+    this.stopped = true;
+  }
+}