“点阵”的版本间的差异

2017年12月25日 (一) 14:08的版本

概述

8x8点阵显示模块，I2C通讯，操作简单。

技术参数

• 工作电压：3.3V or 5V
• I2C数字信号输出
• 8x8点阵显示
• 模块尺寸：24x46x7.5mm

引脚定义

使用教程

Arduino示例

Adafruit_LED_matrix8x8_Backpack_Library点击下载

/*************************************************** 
  This is a library for our I2C LED Backpacks

  Designed specifically to work with the Adafruit LED Matrix backpacks 
  ----> http://www.adafruit.com/products/872
  ----> http://www.adafruit.com/products/871
  ----> http://www.adafruit.com/products/870

  These displays use I2C to communicate, 2 pins are required to 
  interface. There are multiple selectable I2C addresses. For backpacks
  with 2 Address Select pins: 0x70, 0x71, 0x72 or 0x73. For backpacks
  with 3 Address Select pins: 0x70 thru 0x77

  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution
 ****************************************************/

#include <Wire.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"

Adafruit_8x8matrix matrix = Adafruit_8x8matrix();

void setup() {
  Serial.begin(9600);
  Serial.println("8x8 LED Matrix Test");
  
  matrix.begin(0x70);  // pass in the address
}

static const uint8_t PROGMEM
  smile_bmp[] =
  { B00111100,
    B01000010,
    B10100101,
    B10000001,
    B10100101,
    B10011001,
    B01000010,
    B00111100 },
  neutral_bmp[] =
  { B00111100,
    B01000010,
    B10100101,
    B10000001,
    B10111101,
    B10000001,
    B01000010,
    B00111100 },
  frown_bmp[] =
  { B00111100,
    B01000010,
    B10100101,
    B10000001,
    B10011001,
    B10100101,
    B01000010,
    B00111100 };

void loop() {
  matrix.clear();
  matrix.drawBitmap(0, 0, smile_bmp, 8, 8, LED_ON);
  matrix.writeDisplay();
  delay(500);

  matrix.clear();
  matrix.drawBitmap(0, 0, neutral_bmp, 8, 8, LED_ON);
  matrix.writeDisplay();
  delay(500);

  matrix.clear();
  matrix.drawBitmap(0, 0, frown_bmp, 8, 8, LED_ON);
  matrix.writeDisplay();
  delay(500);

  matrix.clear();      // clear display
  matrix.drawPixel(0, 0, LED_ON);  
  matrix.writeDisplay();  // write the changes we just made to the display
  delay(500);

  matrix.clear();
  matrix.drawLine(0,0, 7,7, LED_ON);
  matrix.writeDisplay();  // write the changes we just made to the display
  delay(500);

  matrix.clear();
  matrix.drawRect(0,0, 8,8, LED_ON);
  matrix.fillRect(2,2, 4,4, LED_ON);
  matrix.writeDisplay();  // write the changes we just made to the display
  delay(500);

  matrix.clear();
  matrix.drawCircle(3,3, 3, LED_ON);
  matrix.writeDisplay();  // write the changes we just made to the display
  delay(500);

  matrix.setTextSize(1);
  matrix.setTextWrap(false);  // we dont want text to wrap so it scrolls nicely
  matrix.setTextColor(LED_ON);
  for (int8_t x=0; x>=-36; x--) {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("Hello");
    matrix.writeDisplay();
    delay(100);
  }
  matrix.setRotation(3);
  for (int8_t x=7; x>=-36; x--) {
    matrix.clear();
    matrix.setCursor(x,0);
    matrix.print("World");
    matrix.writeDisplay();
    delay(100);
  }
  matrix.setRotation(0);
}

MicroPython示例

from microbit import *

'''
acsii_charactor = [
[0x30,0x48,0x48,0x48,0x48,0x48,0x30,0x00],    # 0
[0x20,0x60,0x20,0x20,0x20,0x20,0x70,0x00],    # 1 
[0x30,0x48,0x08,0x10,0x20,0x40,0x78,0x00],    # 2 
[0x30,0x48,0x08,0x30,0x08,0x48,0x30,0x00],    # 3 
[0x10,0x30,0x30,0x50,0x50,0x78,0x10,0x00],    # 4 
[0x78,0x40,0x40,0x70,0x08,0x08,0x70,0x00],    # 5 
[0x30,0x48,0x40,0x70,0x48,0x48,0x30,0x00],    # 6 
[0x78,0x48,0x08,0x10,0x20,0x20,0x20,0x00],    # 7 
[0x30,0x48,0x48,0x30,0x48,0x48,0x30,0x00],    # 8 
[0x30,0x48,0x48,0x38,0x08,0x48,0x30,0x00],    # 9 
[0x30,0x48,0x48,0x48,0x78,0x48,0x48,0x00],    # A 
[0x70,0x48,0x48,0x70,0x48,0x48,0x70,0x00],    # B 
[0x30,0x48,0x40,0x40,0x40,0x48,0x30,0x00],    # C 
[0x70,0x48,0x48,0x48,0x48,0x48,0x70,0x00],    # D 
[0x78,0x40,0x40,0x70,0x40,0x40,0x78,0x00],    # E 
[0x78,0x40,0x40,0x70,0x40,0x40,0x40,0x00],    # F 
[0x30,0x48,0x40,0x58,0x48,0x48,0x30,0x00],    # G 
[0x48,0x48,0x48,0x78,0x48,0x48,0x48,0x00],    # H 
[0x70,0x20,0x20,0x20,0x20,0x20,0x70,0x00],    # I 
[0x08,0x08,0x08,0x08,0x48,0x48,0x30,0x00],    # J 
[0x48,0x48,0x50,0x60,0x50,0x48,0x48,0x00],    # K 
[0x40,0x40,0x40,0x40,0x40,0x40,0x78,0x00],    # L 
[0x48,0x78,0x78,0x48,0x48,0x48,0x48,0x00],    # M 
[0x48,0x68,0x68,0x58,0x58,0x48,0x48,0x00],    # N 
[0x78,0x48,0x48,0x48,0x48,0x48,0x78,0x00],    # O 
[0x70,0x48,0x48,0x70,0x40,0x40,0x40,0x00],    # P 
[0x30,0x48,0x48,0x48,0x68,0x58,0x38,0x00],    # Q 
[0x70,0x48,0x48,0x70,0x60,0x50,0x48,0x00],    # R 
[0x30,0x48,0x40,0x30,0x08,0x48,0x30,0x00],    # S 
[0x78,0x20,0x20,0x20,0x20,0x20,0x20,0x00],    # T 
[0x48,0x48,0x48,0x48,0x48,0x48,0x30,0x00],    # U 
[0x48,0x48,0x48,0x48,0x30,0x30,0x30,0x00],    # V 
[0x48,0x48,0x48,0x48,0x78,0x78,0x48,0x00],    # W 
[0x48,0x48,0x30,0x30,0x30,0x48,0x48,0x00],    # X 
[0x88,0x88,0x50,0x20,0x20,0x20,0x20,0x00],    # Y 
[0x78,0x08,0x10,0x30,0x20,0x40,0x78,0x00],    # Z 
[0x00,0x66,0x99,0x81,0x81,0x42,0x24,0x18],    # 显示桃心
'''

HT16K33_ADDR = 0x70

HT16K33_BLINK_CMD = 0x80
HT16K33_BLINK_DISPLAYON = 0x01
HT16K33_BLINK_OFF = 0
HT16K33_BLINK_2HZ  = 1
HT16K33_BLINK_1HZ  = 2
HT16K33_BLINK_HALFHZ  = 3

HT16K33_CMD_BRIGHTNESS = 0xE0

TM1650_CDigits = [0x00] 

def HT16K33SetBrightness(brightness):
   b = brightness 
   if b > 15:
       b = 15
   var = HT16K33_CMD_BRIGHTNESS | b
   i2c.write(HT16K33_ADDR, bytearray([var]))

def HT16K33BlinkRate(rate):
   r = rate 
   if r > 3:
       r = 0
   r <<= 1
   var = HT16K33_BLINK_CMD | HT16K33_BLINK_DISPLAYON | r
   i2c.write(HT16K33_ADDR, bytearray([var]))

def HT16K33Init():
    i2c.write(HT16K33_ADDR, bytearray([0x21]))
    HT16K33BlinkRate(HT16K33_BLINK_OFF)
    HT16K33SetBrightness(15)

def HT16K33WriteDisplay(x):  #
    var = bytearray([0x00,
    x[0],0x00,
    x[1],0x00,
    x[2],0x00,
    x[3],0x00,
    x[4],0x00,
    x[5],0x00,
    x[6],0x00,
    x[7],0x00])
    i2c.write(HT16K33_ADDR, var)

# text code
HT16K33Init()
fill_bitmap = bytearray([0x30,0x48,0x48,0x48,0x78,0x48,0x48,0x00]) #display "A"
HT16K33WriteDisplay(fill_bitmap)

图形化示例