3.13 haas506开发教程-example-BH1750

最新推荐文章于 2023-10-20 15:38:50 发布

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#BH1750光照传感器 #microPython #haas506

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本文档介绍了如何在Haas506开发板上使用BH1750光照传感器进行测量。首先，详细说明了BH1750的供电、光照范围和通讯方式。接着，提供了测试代码，展示了如何通过I2C接口读取光照数据，并转换为可读数值。最后，提到了连接传感器和配置board.json的注意事项。

1.BH1750介绍

光照传感器：
1. 供电：3-5V
2. 光照范围：0-65535lx
3. 传感器内置16bitAD转换器
4. I2C通讯

模块实物图1

模块实物图2

2.测试代码

main.py

from driver import I2C
import utime  as time
 
DEVICE     = 0x23 
POWER_DOWN = 0x00 
POWER_ON   = 0x01 
RESET      = 0x07 

CONTINUOUS_LOW_RES_MODE = 0x13
CONTINUOUS_HIGH_RES_MODE_1 = 0x10
CONTINUOUS_HIGH_RES_MODE_2 = 0x11
ONE_TIME_HIGH_RES_MODE_1 = 0x20
ONE_TIME_HIGH_RES_MODE_2 = 0x21
ONE_TIME_LOW_RES_MODE = 0x23
 
def convertToNumber(data):
  return ((data[1] + (256 * data[0])) / 1.2)
 
def readLight():
    global BH
    readBuf=bytearray(2)
    readBuf[0]=ONE_TIME_HIGH_RES_MODE_1
    BH.read(readBuf,2)
    print(readBuf)
    return convertToNumber(readBuf)
 
def main():
    global BH
    BH=I2C()
    BH.open('BH1750')  
    while True:
        print ("Light Level : " + str(int(readLight())) + " lx")
        time.sleep(1)
   
if __name__=="__main__":
   main()

board.json

{
    "name": "haas506",
    "version": "1.0.0",
    "io": {
        "ADC0": {
            "type": "ADC",
            "port": 0,
            "sampling": 12000000
        },
        "mpu6050": {
            "type": "I2C",
            "port": 1,
            "addrWidth": 7,
            "freq": 400000,
            "mode": "master",
            "devAddr": 105
        },
        "BH1750": {
            "type": "I2C",
            "port": 1,
            "addrWidth": 7,
            "freq": 400000,
            "mode": "master",
            "devAddr": 35
        },
        "KEY1": {
            "type": "GPIO",
            "port": 44,
            "dir": "irq",
            "pull": "pullup",
            "intMode": "rising"
        },
        "work_led": {
            "type": "GPIO",
            "port": 0,
            "dir": "output",
            "pull": "pulldown"
        },
        "net_led": {
            "type": "GPIO",
            "port": 7,
            "dir": "output",
            "pull": "pulldown"
        },
        "cloud_led": {
            "type": "GPIO",
            "port": 9,
            "dir": "output",
            "pull": "pulldown"
        },
        "d2_led": {
            "type": "GPIO",
            "port": 6,
            "dir": "output",
            "pull": "pulldown"
        },
        "d3_led": {
            "type": "GPIO",
            "port": 8,
            "dir": "output",
            "pull": "pulldown"
        },
        "SPI0": {
        "type": "SPI",
        "port": 0,
        "mode": "master",
        "freq": 2000000
        },
    "serial1":{
        "type":"UART",
        "port":0,
        "dataWidth":8,
        "baudRate":115200,
        "stopBits":1,
        "flowControl":"disable",
        "parity":"none"
    },
    "serial2":{
        "type":"UART",
        "port":1,
        "dataWidth":8,
        "baudRate":115200,
        "stopBits":1,
        "flowControl":"disable",
        "parity":"none"
    },
    "serial3":{
        "type":"UART",
        "port":2,
        "dataWidth":8,
        "baudRate":115200,
        "stopBits":1,
        "flowControl":"disable",
        "parity":"none"
    }
    },
    "debugLevel": "ERROR"
  }