From 99c06ce43a338559b6543e6fd0a7f9dc9e11b455 Mon Sep 17 00:00:00 2001
From: Kohei Watanabe <kou029w@gmail.com>
Date: Fri, 18 Oct 2019 21:48:05 +0900
Subject: [PATCH] yarn build

---
 index.d.ts |  1 +
 index.js   | 20 ++++++++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index 7834829..6e57ee6 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -27,6 +27,7 @@ export interface I2CSlaveDevice {
     write16(registerNumber: number, value: number): Promise<number>;
 }
 export declare class OperationError extends Error {
+    constructor(message: string);
 }
 export declare function requestI2CAccess(): Promise<I2CAccess>;
 export {};
diff --git a/index.js b/index.js
index 65d1152..ffe19f3 100644
--- a/index.js
+++ b/index.js
@@ -45,15 +45,27 @@ class I2CPort {
         });
         return {
             slaveAddress,
-            read8: cmd => bus.readByte(slaveAddress, cmd),
-            read16: cmd => bus.readWord(slaveAddress, cmd),
-            write8: (cmd, byte) => bus.writeByte(slaveAddress, cmd, byte),
-            write16: (cmd, word) => bus.writeWord(slaveAddress, cmd, word)
+            read8: cmd => bus.readByte(slaveAddress, cmd).catch(error => {
+                throw new OperationError(error);
+            }),
+            read16: cmd => bus.readWord(slaveAddress, cmd).catch(error => {
+                throw new OperationError(error);
+            }),
+            write8: (cmd, byte) => bus.writeByte(slaveAddress, cmd, byte).catch(error => {
+                throw new OperationError(error);
+            }),
+            write16: (cmd, word) => bus.writeWord(slaveAddress, cmd, word).catch(error => {
+                throw new OperationError(error);
+            })
         };
     }
 }
 exports.I2CPort = I2CPort;
 class OperationError extends Error {
+    constructor(message) {
+        super(message);
+        this.name = this.constructor.name;
+    }
 }
 exports.OperationError = OperationError;
 async function requestI2CAccess() {