差别
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| 两侧同时换到之前的修订记录 前一修订版 后一修订版 | 前一修订版 | ||
|
barometersensors [2023/07/24 15:14] huangyuan |
barometersensors [2023/07/25 12:07] (当前版本) huangyuan |
||
|---|---|---|---|
| 行 89: | 行 89: | ||
| from machine import I2C, Pin | from machine import I2C, Pin | ||
| import time | import time | ||
| - | |||
| i2c = I2C(0, scl=Pin(21), sda=Pin(20), freq=400_000) | i2c = I2C(0, scl=Pin(21), sda=Pin(20), freq=400_000) | ||
| - | |||
| ms5611_c = [0, 0, 0, 0, 0, 0, 0, 0] | ms5611_c = [0, 0, 0, 0, 0, 0, 0, 0] | ||
| - | |||
| GY63_ADDRESS = 0x77 | GY63_ADDRESS = 0x77 | ||
| print(i2c.scan()) | print(i2c.scan()) | ||
| - | |||
| def reset(): | def reset(): | ||
| i2c.writeto(GY63_ADDRESS, bytearray([0x1E])) | i2c.writeto(GY63_ADDRESS, bytearray([0x1E])) | ||
| time.sleep(0.01) | time.sleep(0.01) | ||
| - | |||
| def init(): | def init(): | ||
| reset() | reset() | ||
| for i in range(8): | for i in range(8): | ||
| ms5611_c[i] = prom(i) | ms5611_c[i] = prom(i) | ||
| - | |||
| def prom(coef_num): | def prom(coef_num): | ||
| rxbuff = i2c.readfrom_mem(GY63_ADDRESS, 0XA0+coef_num*2, 3) | rxbuff = i2c.readfrom_mem(GY63_ADDRESS, 0XA0+coef_num*2, 3) | ||
| - | return rxbuff[0] << 8 | rxbuff[1] | + | return rxbuff[0] << 8 | rxbuff[1] |
| - | + | def read_pressure(): | |
| - | def read_pressure(): | + | i2c.writeto(GY63_ADDRESS, bytearray([0x48])) |
| - | | + | time.sleep(0.02) |
| - | i2c.writeto(GY63_ADDRESS, bytearray([0x48])) | + | data = i2c.readfrom_mem(GY63_ADDRESS, 0, 3) |
| - | | + | pressure = (data[0] << 16) + (data[1] << 8) + data[2] |
| - | time.sleep(0.02) | + | |
| - | + | ||
| - | data = i2c.readfrom_mem(GY63_ADDRESS, 0, 3) | + | |
| - | + | ||
| - | pressure = (data[0] << 16) + (data[1] << 8) + data[2] | + | |
| - | + | ||
| return pressure | return pressure | ||
| - | |||
| def read_temperature(): | def read_temperature(): | ||
| - | + | i2c.writeto(GY63_ADDRESS, bytearray([0x58])) | |
| - | i2c.writeto(GY63_ADDRESS, bytearray([0x58])) | + | time.sleep(0.02) |
| - | | + | data = i2c.readfrom_mem(GY63_ADDRESS, 0, 3) |
| - | time.sleep(0.02) | + | temperature = (data[0] << 16) + (data[1] << 8) + data[2] |
| - | + | ||
| - | data = i2c.readfrom_mem(GY63_ADDRESS, 0, 3) | + | |
| - | + | ||
| - | temperature = (data[0] << 16) + (data[1] << 8) + data[2] | + | |
| - | | + | |
| return temperature | return temperature | ||
| - | |||
| - | |||
| def calculate(ut, up): | def calculate(ut, up): | ||
| - | |||
| dT = ut - (ms5611_c[5] << 8) | dT = ut - (ms5611_c[5] << 8) | ||
| off = (ms5611_c[2] << 16) + ((ms5611_c[4]*dT) >> 7) | off = (ms5611_c[2] << 16) + ((ms5611_c[4]*dT) >> 7) | ||
| sens = (ms5611_c[1] << 15) + ((ms5611_c[3]*dT) >> 8) | sens = (ms5611_c[1] << 15) + ((ms5611_c[3]*dT) >> 8) | ||
| - | temp = 2000 + ((dT*ms5611_c[6]) >> 23) | + | temp = 2000 + ((dT*ms5611_c[6]) >> 23) |
| - | | + | |
| if (temp < 2000): | if (temp < 2000): | ||
| delt = temp - 2000 | delt = temp - 2000 | ||
| delt = 5 * delt *delt | delt = 5 * delt *delt | ||
| off = off - (delt >> 1) | off = off - (delt >> 1) | ||
| - | sens = sens - (delt >> 2) | + | sens = sens - (delt >> 2) |
| - | | + | |
| if (temp < -1500): | if (temp < -1500): | ||
| delt = temp + 1500 | delt = temp + 1500 | ||
| delt = delt * delt | delt = delt * delt | ||
| off = off - (7 * delt) | off = off - (7 * delt) | ||
| - | sens = sens - ((11 * delt) >> 1) | + | sens = sens - ((11 * delt) >> 1) |
| - | | + | |
| temp = temp - ((dT*dT) >> 31) | temp = temp - ((dT*dT) >> 31) | ||
| press = (((int(up)*sens) >> 21) - off) >> 15 | press = (((int(up)*sens) >> 21) - off) >> 15 | ||
| - | return press, temp | + | return press, temp |
| - | | + | |
| init() | init() | ||
| while True: | while True: | ||
| 行 164: | 行 139: | ||
| pressure, temperature = calculate(ut, up) | pressure, temperature = calculate(ut, up) | ||
| print("Pressure:", pressure) | print("Pressure:", pressure) | ||
| - | print("Temperature:", temperature) | + | print("Temperature:", temperature) |
| - | + | ||
| time.sleep(1) | time.sleep(1) | ||
| + | | ||
| + | 结果显示： | ||
| + | |||
| + | {{ ::qiya.png?500 |}} | ||