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| 1 | +''' |
| 2 | +File: i2c_qma7981.py |
| 3 | +Project: i2c |
| 4 | +File Created: Sunday, 11th March 2022 3:51:22 pm |
| 5 | +Author: elian.wang |
| 6 | +
|
| 7 | +----- |
| 8 | +Copyright 2022 - 2022 quectel |
| 9 | +''' |
| 10 | + |
| 11 | +#import log |
| 12 | +from machine import I2C |
| 13 | +#from machine import I2C_simulation |
| 14 | +import utime as time |
| 15 | +""" |
| 16 | +1. calibration校准 |
| 17 | +2. Trigger measurement触发器测量 |
| 18 | +3. read data |
| 19 | +""" |
| 20 | + |
| 21 | +# API 手册 http://qpy.quectel.com/wiki/#/zh-cn/api/?id=i2c |
| 22 | +# AHT10 说明书 |
| 23 | +# https://server4.eca.ir/eshop/AHT10/Aosong_AHT10_en_draft_0c.pdf |
| 24 | + |
| 25 | + |
| 26 | +class aht10class(): |
| 27 | + i2c_log = None |
| 28 | + i2c_dev = None |
| 29 | + i2c_addre = None |
| 30 | + |
| 31 | + # Initialization command |
| 32 | + AHT10_CALIBRATION_CMD = 0xE1 |
| 33 | + # Trigger measurement |
| 34 | + AHT10_START_MEASURMENT_CMD = 0xAC |
| 35 | + # reset |
| 36 | + AHT10_RESET_CMD = 0xBA |
| 37 | + |
| 38 | + def write_data(self, data): |
| 39 | + print(self.i2c_addre, data, len(data)) |
| 40 | + self.i2c_dev.write(self.i2c_addre, |
| 41 | + bytearray(0x00), 0, |
| 42 | + bytearray(data), len(data)) |
| 43 | + pass |
| 44 | + |
| 45 | + def read_data(self, length): |
| 46 | + print("read_data start") |
| 47 | + r_data = [0x00 for i in range(length)] |
| 48 | + r_data = bytearray(r_data) |
| 49 | + print("read_data start1") |
| 50 | + ret = self.i2c_dev.read(self.i2c_addre, |
| 51 | + bytearray(0x00), 0, |
| 52 | + r_data, length, |
| 53 | + 0) |
| 54 | + print("read_data start2") |
| 55 | + print('ret',ret) |
| 56 | + print('r_data:',r_data) |
| 57 | + return list(r_data) |
| 58 | + |
| 59 | + def aht10_init(self, addre=0x38, Alise="Ath10"): |
| 60 | + #self.i2c_log = log.getLogger(Alise) |
| 61 | + self.i2c_dev = I2C(I2C.I2C1, I2C.FAST_MODE) # 返回i2c对象 i2c类功能：用于设备之间通信的双线协议。 |
| 62 | + print("test 11") |
| 63 | + #self.i2c_dev = I2C_simulation(I2C_simulation.GPIO19, I2C_simulation.GPIO20, 200) #asr |
| 64 | + #self.i2c_dev = I2C_simulation(I2C_simulation.GPIO10, I2C_simulation.GPIO11, 300) #zhanrui |
| 65 | + #self.i2c_dev = I2C_simulation(I2C_simulation.GPIO13, I2C_simulation.GPIO14, 500) #BC25 |
| 66 | + #self.i2c_dev = I2C_simulation(I2C_simulation.GPIO3, I2C_simulation.GPIO4, 600) #gao |
| 67 | + self.i2c_addre = addre |
| 68 | + self.sensor_init() |
| 69 | + pass |
| 70 | + |
| 71 | + def aht10_transformation_temperature(self, data): |
| 72 | + r_data = data |
| 73 | + # 根据数据手册的描述来转化温度 |
| 74 | + humidity = (r_data[0] << 12) | ( |
| 75 | + r_data[1] << 4) | ((r_data[2] & 0xF0) >> 4) |
| 76 | + humidity = (humidity/(1 << 20)) * 100.0 |
| 77 | + print("current humidity is {0}%".format(humidity)) |
| 78 | + temperature = ((r_data[2] & 0xf) << 16) | ( |
| 79 | + r_data[3] << 8) | r_data[4] |
| 80 | + temperature = (temperature * 200.0 / (1 << 20)) - 50 |
| 81 | + print("current temperature is {0}°C".format(temperature)) |
| 82 | + |
| 83 | + def sensor_init(self): |
| 84 | + ''' |
| 85 | + 传感器初始化，校准 |
| 86 | + ''' |
| 87 | + # calibration |
| 88 | + print("test 112") |
| 89 | + self.write_data([self.AHT10_CALIBRATION_CMD, 0x08, 0x00]) |
| 90 | + print("test 113") |
| 91 | + time.sleep_ms(300) # at last 300ms |
| 92 | + print("test 114") |
| 93 | + pass |
| 94 | + |
| 95 | + def ath10_reset(self): |
| 96 | + self.write_data([self.AHT10_RESET_CMD]) |
| 97 | + time.sleep_ms(20) # at last 20ms |
| 98 | + |
| 99 | + def Trigger_measurement(self): |
| 100 | + # Trigger data conversion |
| 101 | + self.write_data([self.AHT10_START_MEASURMENT_CMD, 0x33, 0x00]) |
| 102 | + time.sleep_ms(200) # at last delay 75ms |
| 103 | + # check has success |
| 104 | + r_data = self.read_data(6) |
| 105 | + # check bit7 |
| 106 | + if (r_data[0] >> 7) != 0x0: |
| 107 | + print("Conversion has error") |
| 108 | + else: |
| 109 | + self.aht10_transformation_temperature(r_data[1:6]) |
| 110 | + |
| 111 | +ath_dev = None |
| 112 | + |
| 113 | +def i2c_aht10_test(): |
| 114 | + global ath_dev |
| 115 | + ath_dev = aht10class() |
| 116 | + ath_dev.aht10_init() |
| 117 | + print("test 1") |
| 118 | + |
| 119 | + # 测试十次 |
| 120 | + for i in range(5): |
| 121 | + print("test 1 ",i) |
| 122 | + ath_dev.Trigger_measurement() |
| 123 | + print("test 1 end",i) |
| 124 | + time.sleep(1) |
| 125 | + |
| 126 | + |
| 127 | +if __name__ == "__main__": |
| 128 | + print('start') |
| 129 | + i2c_aht10_test() |
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