sairwolf course - 線上書籍

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micro:bit開發板
============

[osoyoo](https://osoyoo.com/2018/09/19/micro-bit-lesson-using-the-i2c-lcd-1602-display/)

**I2C Address**

<table width="201"> <thead> <tr> <th>PCF8574</th> <th>PCF8574A</th> </tr> </thead> <tbody> <tr> <td>0x27</td> <td>0x3F</td> </tr> </tbody> </table>- PCF8574: 39
- PCF8574A: 63
 
**API**

- LcdInit(Addr: number)  
 Initial LCD  
 Addr: I2C Address.
- ShowNumber(n: number, x: number, y: number)  
 show a number in LCD at given position.  
 n: number will be show  
 x: is LCD column position, [0 – 15]  
 y: is LCD row position, [0 – 1]
- ShowString(s: string, x: number, y: number)  
 show a string in LCD at given position.  
 s: string will be show  
 x: is LCD column position, [0 – 15]  
 y: is LCD row position, [0 – 1]
- on()  
 turn on LCD
- off()  
 turn off LCD
- clear()  
 clear LCD content
- BacklightOn()  
 turn on LCD backlight
- BacklightOff()  
 turn off LCD backlight
- shl() shift left screen 
- shr() shift right screen

Connection for flame sensor:

<table width="183"> <thead> <tr> <th>microbit</th> <th>LCD1602</th> </tr> </thead> <tbody> <tr> <td>5V</td> <td>VCC</td> </tr> <tr> <td>GND</td> <td>GND</td> </tr> <tr> <td>P19/SCL</td> <td>SCL</td> </tr> <tr> <td>P20/SDA</td> <td>SDA</td> </tr> </tbody> </table>  
 LCD1602a vcc 3.3V

吉哥的makecode 積木 <https://github.com/lioujj/pxt-lcd1602>

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