[LPC55S69]逐飞LPC55S69 IOT开发板进阶例程--传感器模块篇

mgn · 发表于 2020-10-26 14:47:31

本帖最后由 mgn 于 2020-10-26 16:54 编辑

逐飞的IOT板子配了好多个传感器模块，这也是为什么我们叫它IOT板子的原因之一。

逐飞也提供的对应的例程，无奈我强迫症，凡事儿都要自己来一遍才放心。

这篇帖子以这些传感器的驱动例程为主。目前接口用的都是Flexcomm6，后边再说动态调整的事儿，先测试功能。理解这些传感器

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第一个例程 MS5611 气压计的例程

实例代码：

MS5611气压传感器.zip (719 KB, 下载次数: 6)

mgn · 发表于 2020-10-26 15:25:38

2020-10-26 15:25 更新了温湿度传感器的例程

mgn · 发表于 2020-10-26 16:55:14

2020-10-26 16:54 更新了飞行时间测距传感器V53L0x的例程

jobszheng5 · 发表于 2020-10-26 23:59:56

有的时候，数字传感器调试相对简单，缺少了模拟器件那分动态、随机与收敛的兴奋。
有的时候，数字传感器的结果的算法也确实挺让人头痛的。

jinglixixi · 发表于 2020-10-27 00:25:57

本帖最后由 jinglixixi 于 2020-12-3 08:16 编辑

这有时候写的妙!!!

leo01 · 发表于 2020-10-27 11:29:36

支持

香水橙 · 发表于 2020-12-2 18:44:59

给大家看个好玩的

以下是代码：

from cup import I2C
import utime
I2C_MS5611 = 0b1110111 # Address of MS5611
MS5xxx_CMD_RESET = 0x1E # perform reset
MS5xxx_CMD_ADC_READ=0x00 # initiate read sequence
MS5xxx_CMD_ADC_CONV=0x40 # start conversion
MS5xxx_CMD_ADC_D1 = 0x00 # read ADC 1
MS5xxx_CMD_ADC_D2 = 0x10 # read ADC 2
MS5xxx_CMD_ADC_256 =0x00 # set ADC oversampling ratio to 256
MS5xxx_CMD_ADC_512 =0x02 # set ADC oversampling ratio to 512
MS5xxx_CMD_ADC_1024=0x04 # set ADC oversampling ratio to 1024
MS5xxx_CMD_ADC_2048=0x06 # set ADC oversampling ratio to 2048
MS5xxx_CMD_ADC_4096=0x08 # set ADC oversampling ratio to 4096
MS5xxx_CMD_PROM_RD =0xA0 # initiate readout of PROM registers
def ms5611_send_cmd(i2c, cmd):
i2c.send(cmd, I2C_MS5611)
def ms5611_read_prom(i2c):
ms5611_send_cmd(i2c, MS5xxx_CMD_RESET)
utime.sleep_ms(3)
for loop_count in range(8):
ms5611_send_cmd(i2c, MS5xxx_CMD_PROM_RD+2*loop_count)
read_buffer = i2c.recv(2, I2C_MS5611)
ms5611_read_buffer[loop_count] = ((read_buffer[0] & 0xFF) << 8) | (read_buffer[1] & 0xFF)
def ms5611_read_adc(i2c, cmd):
ms5611_send_cmd(i2c, MS5xxx_CMD_ADC_CONV + cmd)
cmd &= 0x0F
if cmd == MS5xxx_CMD_ADC_256:
utime.sleep_us(900)
elif cmd == MS5xxx_CMD_ADC_512:
utime.sleep_ms(3)
elif cmd == MS5xxx_CMD_ADC_1024:
utime.sleep_ms(4)
elif cmd == MS5xxx_CMD_ADC_2048:
utime.sleep_ms(6)
elif cmd == MS5xxx_CMD_ADC_4096:
utime.sleep_ms(10)
ms5611_send_cmd(i2c, MS5xxx_CMD_ADC_READ)
func_data_buffer = i2c.recv(3, I2C_MS5611)
value = (func_data_buffer[0] & 0xFF) << 16
value |= (func_data_buffer[1] & 0xFF) << 8
return value | (func_data_buffer[2] & 0xFF)
def ms5611_read_out(i2c):
# Reserve these float variables
dT = float(0.0)
OFF = float(0.0)
SENS = float(0.0)
T2 = float(0.0)
OFF2 = float(0.0)
SENS2 = float(0.0)
data2 = ms5611_read_adc(i2c, MS5xxx_CMD_ADC_D2+MS5xxx_CMD_ADC_4096)
data1 = ms5611_read_adc(i2c, MS5xxx_CMD_ADC_D1+MS5xxx_CMD_ADC_4096)
dT = data2 - (ms5611_read_buffer[5] << 8)
OFF = (ms5611_read_buffer[2] << 16) + (dT*ms5611_read_buffer[4] / 0x80)
SENS = (ms5611_read_buffer[1] << 15) + (dT*ms5611_read_buffer[3] / 0x100)
ms5611_temperature = (2000 + (dT * ms5611_read_buffer[6] / 0x800000))
ms5611_pressure = (((data1 * SENS) / 0x200000 - OFF) / 0x8000)
if ms5611_temperature < 2000:
T2 = dT * dT / 0x80000000
OFF2 = 5 * (ms5611_temperature - 2000) * (ms5611_temperature - 2000) / 0x02
SENS2 = 5 * (ms5611_temperature - 2000) * (ms5611_temperature - 2000) / 0x04
if ms5611_temperature < -1500:
OFF2 += 7 * (ms5611_temperature + 1500) * (ms5611_temperature + 1500)
SENS2 += 11 * (ms5611_temperature + 1500) * (ms5611_temperature + 1500) / 0x02
ms5611_temperature -= T2
OFF -= OFF2
SENS -= SENS2
ms5611_pressure = (((data1 * SENS) / 0x200000 - OFF) / 0x8000)
return ms5611_temperature, ms5611_pressure
ms5611_read_buffer = [0,] * 8
i2c = I2C(1, I2C.MASTER, baudrate=50000)
ms5611_send_cmd(i2c, MS5xxx_CMD_RESET)
utime.sleep_ms(1)
ms5611_read_prom(i2c)
for _ in range(5):
temperature, pressure = ms5611_read_out(i2c)
print("ms5611_get_temperature: %d.%d." % (temperature/100, temperature%100))
print("ms5611_get_pressure : %d." % pressure)
utime.sleep_ms(1000)

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