2019-02-14 10:21:14 +08:00
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# EXT.IO {docsify-ignore-all}
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2019-01-17 16:14:12 +08:00
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<img src="assets/img/product_pics/unit/unit_extio_01.png" width="30%" height="30%"><img src="assets/img/product_pics/unit/unit_extio_02.png" width="30%" height="30%">
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***
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2019-01-27 18:42:25 +08:00
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:memo:**[Description](#Description)** :octocat:**[Example](#Example)** 🛒**[Purchase](https://pt.aliexpress.com/store/product/M5Stack-Official-Extend-Serial-IO-I-O-Unit-Grove-Cable-I2C-Interface-for-Arduino-Blockly-ESP32/3226069_32966582585.html?spm=a2g03.12010615.8148356.48.3b773d71o7oNY1)**
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2019-01-17 16:14:12 +08:00
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<!-- :memo:**[Description](#Description)** :octocat:**[Example](#Example)** :electric_plug:**[Schematic](#Schematic)** 🛒**[Purchase](https://pt.aliexpress.com/store/product/M5Stack-Official-Extend-Serial-IO-I-O-Unit-Grove-Cable-I2C-Interface-for-Arduino-Blockly-ESP32/3226069_32966582585.html?spm=a2g03.12010615.8148356.48.3b773d71o7oNY1)** -->
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2019-01-22 19:18:33 +08:00
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## 概要
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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**<mark>EXT.IO</mark>**ユニットはI/Oポートを拡張します。2本のI/Oピンを8ビットの汎用パラレル入出力（GPIO）に拡張可能なPCA9554PWを統合しています。
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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このユニットはM5CoreのGRVOE Aを経て、I2C通信で接続されます。I2Cアドレスは**0x27**です。
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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## 特徴
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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- I/O拡張数: 8
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2019-02-28 13:43:11 +08:00
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- GROVEインターフェース、[UIFlow](http://flow.m5stack.com)と[Arduino](http://www.arduino.cc)をサポート
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2019-01-22 19:18:33 +08:00
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- LEGO互換の穴
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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## 関連リンク
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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- **[公式ビデオ](https://www.youtube.com/channel/UCozgFVglWYQXbvTmGyS739w)**
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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- **[フォーラム](http://forum.m5stack.com/)**
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2019-01-17 16:14:12 +08:00
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2019-01-22 19:18:33 +08:00
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- Datasheet
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- **[PCA9554PW](https://pdf1.alldatasheet.com/datasheet-pdf/view/86709/PHILIPS/PCA9554PW.html)**
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2019-01-17 16:14:12 +08:00
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2019-01-27 18:42:25 +08:00
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## サンプルコード
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### 1. Arduino IDE
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*特定のルーチンについてはここをクリックしてください[サンプルコード](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/EXTIO/Arduino)。*
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```arduino
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/*
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Connect to GRVOE A on M5Core
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*/
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#include <M5Stack.h>
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#include "PCA9554.h" // Load the PCA9554 Library
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// new a object
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PCA9554 ioCon1(0x27);
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uint8_t res;
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// initialization
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M5.begin();
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Wire.begin();
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ioCon1.twiWrite(21, 22); // GROVE A
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delay(10);
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res = 1;
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ioCon1.twiRead(res);
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Serial.printf("res:%d\r\n", res);
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ioCon1.portMode0(ALLOUTPUT); //Set the port as all output
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// set the specific pin
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ioCon1.digitalWrite0(0, HIGH);
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ioCon1.digitalWrite0(1, HIGH);
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ioCon1.digitalWrite0(2, HIGH);
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ioCon1.digitalWrite0(3, HIGH);
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ioCon1.digitalWrite0(4, HIGH);
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ioCon1.digitalWrite0(5, HIGH);
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ioCon1.digitalWrite0(6, HIGH);
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ioCon1.digitalWrite0(7, HIGH);
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// write 0-7 HIGHT
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Serial.println(ioCon1.digitalWritePort0(0xff));
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// write 0-7 LOW
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Serial.println(ioCon1.digitalWritePort0(0x00));
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```
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<img src="assets/img/product_pics/unit/unit_extio_03.png">
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### 2. UIFlow
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*特定のルーチンについてはここをクリックしてください[サンプルコード](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/EXTIO/UIFlow).*
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<img src="assets/img/product_pics/unit/unit_example/EXTIO/example_unit_extio_01.png">
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2019-01-22 19:18:33 +08:00
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### ピンマップ
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2019-01-17 16:14:12 +08:00
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<table>
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<tr><td>M5Core(GROVE A)</td><td>GPIO22</td><td>GPIO21</td><td>5V</td><td>GND</td></tr>
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<tr><td>EXT.IO Unit</td><td>SCL</td><td>SDA</td><td>5V</td><td>GND</td></tr>
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</table>
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