From eed745eaca8af2a5f8a7a4e40e84828b8c155dc8 Mon Sep 17 00:00:00 2001
From: Uri Shaked
Date: Sun, 10 May 2020 09:01:53 +0300
Subject: feat(gpio): add setPin() function

close #26
---
 src/peripherals/gpio.spec.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src/peripherals/gpio.spec.ts')

diff --git a/src/peripherals/gpio.spec.ts b/src/peripherals/gpio.spec.ts
index f3b1a0f..1dfaf7d 100644
--- a/src/peripherals/gpio.spec.ts
+++ b/src/peripherals/gpio.spec.ts
@@ -93,4 +93,27 @@ describe('GPIO', () => {
       expect(listener).toHaveBeenCalled();
     });
   });
+
+  describe('setPin', () => {
+    it('should set the value of the given pin', () => {
+      const cpu = new CPU(new Uint16Array(1024));
+      const port = new AVRIOPort(cpu, portBConfig);
+      cpu.writeData(0x24, 0); // DDRB <- 0
+      port.setPin(4, true);
+      expect(cpu.data[0x23]).toEqual(0x10);
+      port.setPin(4, false);
+      expect(cpu.data[0x23]).toEqual(0x0);
+    });
+
+    it('should only update PIN register when pin in Input mode', () => {
+      const cpu = new CPU(new Uint16Array(1024));
+      const port = new AVRIOPort(cpu, portBConfig);
+      cpu.writeData(0x24, 0x10); // DDRB <- 0x10
+      cpu.writeData(0x25, 0x0); // PORTB <- 0x0
+      port.setPin(4, true);
+      expect(cpu.data[0x23]).toEqual(0x0);
+      cpu.writeData(0x24, 0x0); // DDRB <- 0x0
+      expect(cpu.data[0x23]).toEqual(0x10);
+    });
+  });
 });
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