实验箱固件兼容SHT20 SPL06，旧：bme280

Author: lijutsang

port/boards/mpython-classroom-kit/modules/mpython.py

@@ -599,6 +599,305 @@ def irq(self, *args, **kws):
         self.__pin.irq(*args, **kws)
 
 
+# 202108018 更换SHT20 SPL06传感器
+class WEATHER(object):
+    def __init__(self):
+        self.i2c = i2c
+        addr = self.i2c.scan()
+        if 118 in addr:
+            WEATHER.chip = 1  # SPL06-001
+            WEATHER.IIC_ADDR = 118
+        elif 119 in addr:
+            WEATHER.chip = 2  # BME280
+            WEATHER.IIC_ADDR = 119
+        else:
+            raise OSError("WEATHER init error")
+        if(WEATHER.chip == 1):
+            # SPL06
+            WEATHER._writeReg(0x06, 0x01) # 压力配置寄存器
+            WEATHER._writeReg(0x07, 0x80) # 温度配置寄存器
+            WEATHER._writeReg(0x08, 0x07) # 设置连续的压力和温度测量
+            WEATHER._writeReg(0x09, 0x00) 
+            sleep_ms(50)
+            try:
+                id = WEATHER._readReg(0x0D)
+                if(id[0]!=0x10):
+                    print('SPL06 ID error:',id)
+            except OSError as e:
+                print(e)
+            # SHT20
+            self.sht20 = SHT20() 
+        elif(WEATHER.chip == 2):
+            self.bme280 = BME280()
+
+    def _readReg(reg, nbytes=1):
+        return i2c.readfrom_mem(WEATHER.IIC_ADDR, reg, nbytes)
+
+    def _writeReg(reg, value):
+        i2c.writeto_mem(WEATHER.IIC_ADDR, reg, value.to_bytes(1, 'little'))
+
+    def get_traw(self):
+        tmp_MSB = WEATHER._readReg(0x03)
+        tmp_LSB = WEATHER._readReg(0x04)
+        tmp_XLSB = WEATHER._readReg(0x05)
+
+        tmp = (tmp_MSB[0] << 16) | (tmp_LSB[0] << 8) | tmp_XLSB[0]
+        if(tmp & (1 << 23)):
+            tmp= -((tmp ^ 0xffffff) +1)
+
+        return tmp
+
+    def get_temperature_scale_factor(self):
+        tmp_Byte = WEATHER._readReg(0x07)
+        tmp_Byte = tmp_Byte[0] & 0B111 
+
+        if(tmp_Byte == 0B000):
+            k = 524288.0
+        elif(tmp_Byte == 0B001):
+            k = 1572864.0
+        elif(tmp_Byte == 0B010):
+            k = 3670016.0
+        elif(tmp_Byte == 0B011):
+            k = 7864320.0
+        elif(tmp_Byte == 0B100):
+            k = 253952.0
+        elif(tmp_Byte == 0B101):
+            k = 516096.0
+        elif(tmp_Byte == 0B110):
+            k = 1040384.0
+        elif(tmp_Byte == 0B111):
+            k = 2088960.0 
+
+        return k
+
+    def get_pressure_scale_factor(self):
+        tmp_Byte = WEATHER._readReg(0x06)
+        tmp_Byte = tmp_Byte[0] & 0B111 
+
+        if(tmp_Byte == 0B000):
+            k = 524288.0
+        elif(tmp_Byte == 0B001):
+            k = 1572864.0
+        elif(tmp_Byte == 0B010):
+            k = 3670016.0
+        elif(tmp_Byte == 0B011):
+            k = 7864320.0
+        elif(tmp_Byte == 0B100):
+            k = 253952.0
+        elif(tmp_Byte == 0B101):
+            k = 516096.0
+        elif(tmp_Byte == 0B110):
+            k = 1040384.0
+        elif(tmp_Byte == 0B111):
+            k = 2088960.0
+
+        return k
+
+    def get_praw(self):
+        tmp_MSB = WEATHER._readReg(0x00)
+        tmp_LSB = WEATHER._readReg(0x01)
+        tmp_XLSB = WEATHER._readReg(0x02)
+
+        tmp = ((tmp_MSB[0] << 16) | (tmp_LSB[0] << 8) | tmp_XLSB[0] )& 0x00ffffff
+
+        if(tmp & (1 << 23)):
+            tmp= -((tmp ^ 0xffffff) +1)
+
+        return tmp
+
+    def get_c0(self):
+        tmp_MSB = WEATHER._readReg(0x10)
+        tmp_LSB = WEATHER._readReg(0x11)
+
+        tmp_LSB = tmp_LSB[0] >> 4
+        tmp = tmp_MSB[0] << 4 | tmp_LSB
+
+        if (tmp & (1 << 11)):
+            tmp= -((tmp ^ 0xfff) +1)
+            
+        return tmp
+    
+    def get_c1(self):
+        tmp_MSB = WEATHER._readReg(0x11)
+        tmp_LSB = WEATHER._readReg(0x12)
+
+        tmp = ((tmp_MSB[0] & 0xF) << 8) | tmp_LSB[0]
+
+        if (tmp & (1 << 11)):
+            tmp= -((tmp ^ 0xfff) +1)
+
+        return tmp
+    
+    def get_c00(self):
+        tmp_MSB = WEATHER._readReg(0x13)
+        tmp_LSB = WEATHER._readReg(0x14)
+        tmp_XLSB = WEATHER._readReg(0x15)
+
+        tmp = ((tmp_MSB[0] << 12) | (tmp_LSB[0] << 4) | (tmp_XLSB[0] >> 4))
+
+        if(tmp & (1 << 19)):
+            tmp = -((tmp ^ 0xfffff) +1)
+        
+        return tmp
+
+    def get_c10(self):
+        tmp_MSB = WEATHER._readReg(0x15)
+        tmp_LSB = WEATHER._readReg(0x16)
+        tmp_XLSB = WEATHER._readReg(0x17)
+
+        tmp_MSB = tmp_MSB[0] & 0x0F
+
+        tmp = (tmp_MSB << 16) | (tmp_LSB[0]  << 8) | tmp_XLSB[0]
+
+        if(tmp & (1 << 19)):
+            tmp= -((tmp ^ 0xFFFFF) +1)
+
+        return tmp
+
+    def get_c01(self):
+        tmp_MSB = WEATHER._readReg(0x18)
+        tmp_LSB = WEATHER._readReg(0x19)
+
+        tmp = (tmp_MSB[0] << 8) | tmp_LSB[0]
+
+        if(tmp & (1 << 15)):
+            tmp= -((tmp ^ 0xFFFF) +1)
+
+        return tmp
+
+    def get_c11(self):
+        tmp_MSB = WEATHER._readReg(0x1A)
+        tmp_LSB = WEATHER._readReg(0x1B)
+
+        tmp = (tmp_MSB[0] << 8) | tmp_LSB[0]
+
+        if(tmp & (1 << 15)):
+            tmp= -((tmp ^ 0xFFFF) +1)
+
+        return tmp
+
+    def get_c20(self):
+        tmp_MSB = WEATHER._readReg(0x1C)
+        tmp_LSB = WEATHER._readReg(0x1D)
+
+        tmp = (tmp_MSB[0] << 8) | tmp_LSB[0]
+        
+        if(tmp & (1 << 15)):
+            tmp= -((tmp ^ 0xFFFF) +1)
+
+        return tmp
+
+    def get_c21(self):
+        tmp_MSB = WEATHER._readReg(0x1E)
+        tmp_LSB = WEATHER._readReg(0x1F)
+        tmp = (tmp_MSB[0] << 8) | tmp_LSB[0]
+        
+        if(tmp & (1 << 15)):
+            tmp= -((tmp ^ 0xFFFF) +1)
+
+        return tmp
+
+    def get_c30(self):
+        tmp_MSB = WEATHER._readReg(0x20)
+        tmp_LSB = WEATHER._readReg(0x21)
+
+        tmp = (tmp_MSB[0] << 8) | tmp_LSB[0]
+        
+        if(tmp & (1 << 15)):
+            tmp= -((tmp ^ 0xFFFF) +1)
+
+        return tmp
+    
+    def get_temperature(self):
+        """
+        获取温度
+        :return: 温度,单位摄氏度
+        """
+        c0 = self.get_c0()
+        c1 = self.get_c1()
+        traw = self.get_traw()
+        t_scale = self.get_temperature_scale_factor()
+
+        traw_sc = traw / t_scale
+        temp_c = ((c0) * 0.5) + ((c1) * traw_sc)
+        temp_f = (temp_c * 9/5) + 32
+
+        return temp_c
+
+    def pressure(self):
+        """
+        获取气压
+        :return: 气压,单位Pa
+        """
+        if(WEATHER.chip == 1):
+            traw = self.get_traw()
+            t_scale = self.get_temperature_scale_factor()
+            traw_sc = traw / t_scale
+
+            praw = self.get_praw()
+            p_scale = self.get_pressure_scale_factor()
+            praw_sc = praw / p_scale
+
+            pcomp = self.get_c00()+ praw_sc*(self.get_c10()+ praw_sc*(self.get_c20()+ praw_sc*self.get_c30())) + traw_sc*self.get_c01() + traw_sc*praw_sc*(self.get_c11()+praw_sc*self.get_c21())
+        # print("pcomp", "{:.2f}".format(pcomp))
+        elif(WEATHER.chip == 2):
+            pcomp = self.bme280.pressure()
+       
+        return pcomp
+
+    def temperature(self):
+        """
+        获取温度
+        :return: 温度,单位摄氏度
+        """
+        if(WEATHER.chip == 1):
+            return self.sht20.temperature()
+        elif(WEATHER.chip == 2):
+            return self.bme280.temperature()
+    
+    def humidity(self):
+        """
+        获取湿度
+        :return: 湿度,单位%
+        """
+        if(WEATHER.chip == 1):
+            return self.sht20.humidity()
+        elif(WEATHER.chip == 2):
+            return self.bme280.humidity()
+
+
+class SHT20(object):
+    """
+    温湿度模块SHT20控制类
+    :param i2c: I2C实例对象,默认i2c=i2c.
+    """
+
+    def __init__(self, i2c=i2c):
+        self.i2c = i2c
+
+    def temperature(self):
+        """
+        获取温度
+
+        :return: 温度,单位摄氏度
+        """
+        self.i2c.writeto(0x40, b'\xf3')
+        sleep_ms(70)
+        t = i2c.readfrom(0x40, 2)
+        return -46.86 + 175.72 * (t[0] * 256 + t[1]) / 65535
+
+    def humidity(self):
+        """
+        获取湿度
+
+        :return: 湿度,单位%
+        """
+        self.i2c.writeto(0x40, b'\xf5')
+        sleep_ms(25)
+        t = i2c.readfrom(0x40, 2)
+        return -6 + 125 * (t[0] * 256 + t[1]) / 65535
+
+
 from gui import *
 
 def numberMap(inputNum, bMin, bMax, cMin, cMax):
@@ -617,8 +916,9 @@ def numberMap(inputNum, bMin, bMax, cMin, cMax):
 accelerometer = motion.accelerometer
 gyroscope = motion.gyroscope
 
-# bm280
-bme280 = BME280()
+#气象传感器
+#SHT20 SPL06 bme280
+weather = WEATHER()
 
 # rgb matrix
 rgb = NeoPixel(Pin(25, Pin.OUT), 25, 3, 1)