I have a Pi Pico in a Pico Explorer board. I’m trying to use a ICM20948motion sensor in one of the breakout slots and I’m having trouble installing the driver library. Where do I start?
Ahoy!
Have you looked at the devices github page, it’s linked at the bottom of the store page. Easy to miss.
Open a terminal window with ctrl+alt+t together and enter the text below.
sudo pip install icm20948
Hope this helps :o)
With that command I get an error:
Collecting icm20948
Using cached icm20948-0.0.2-py3-none-any.whl (5.2 kB)
Collecting smbus
Using cached smbus-1.1.post2.tar.gz (104 kB)
Using legacy ‘setup.py install’ for smbus, since package ‘wheel’ is not installed.
Installing collected packages: smbus, icm20948
Running setup.py install for smbus … error
ERROR: Command errored out with exit status 1:
command: /usr/bin/python -u -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-te6qkqlj/smbus_2f901561354c4d43bf1d430506ccaa9b/setup.py’"’"’; file=’"’"’/tmp/pip-install-te6qkqlj/smbus_2f901561354c4d43bf1d430506ccaa9b/setup.py’"’"’;f=getattr(tokenize, ‘"’"‘open’"’"’, open)(file);code=f.read().replace(’"’"’\r\n’"’"’, ‘"’"’\n’"’"’);f.close();exec(compile(code, file, ‘"’"‘exec’"’"’))’ install --record /tmp/pip-record-_dtra7fc/install-record.txt --single-version-externally-managed --compile --install-headers /usr/include/python3.9/smbus
cwd: /tmp/pip-install-te6qkqlj/smbus_2f901561354c4d43bf1d430506ccaa9b/
Complete output (5 lines):
running install
running build
running build_ext
building ‘i2c’ library
error: [Errno 2] No such file or directory: ‘make’
----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python -u -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-te6qkqlj/smbus_2f901561354c4d43bf1d430506ccaa9b/setup.py’"’"’; file=’"’"’/tmp/pip-install-te6qkqlj/smbus_2f901561354c4d43bf1d430506ccaa9b/setup.py’"’"’;f=getattr(tokenize, ‘"’"‘open’"’"’, open)(file);code=f.read().replace(’"’"’\r\n’"’"’, ‘"’"’\n’"’"’);f.close();exec(compile(code, file, ‘"’"‘exec’"’"’))’ install --record /tmp/pip-record-_dtra7fc/install-record.txt --single-version-externally-managed --compile --install-headers /usr/include/python3.9/smbus Check the logs for full command output.
sudo pip install icm20948 installs for Python on a Pi running Pi OS.
Normally on a PICO, you install the custom Pimoroni uf2 file which has the libraries in it for a lot of the breakouts.
Issues · pimoroni/BreakoutGarden (github.com)
It appears that breakout hasn’t ben added to the uf2 just yet though.
ICM20948 (ICM20948 9-DOF Accelerometer, Magnetometer & Gyroscope) · Issue #15 · pimoroni/BreakoutGarden (github.com)
1 Like
If you can use Circuit Python there is this, that might work.
Python & CircuitPython | Adafruit TDK InvenSense ICM-20948 9-DoF IMU | Adafruit Learning System
1 Like
Looks like that’s the answer – it hasn’t been added yet. Thanks!
1 Like
I’ve just spotted my error, ha! You’re using a pico. Doh.
Thanks to alpha who’s been more helpful than me. ;o)
@fishgotnosole
Easy mistake to make, and I’ve made my fair share of them. ;)
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Any chance the icm20948 will be added to the uf2, anytime soon?
Is there a way to add the micropython module manually, without a script to actually add it to the uf2?
I don’t work for Pimoroni, or have anything to do with the uf2 file.
In Thonny, you can do a File > save as > Raspberry Pi Pico, to add files to the uf2. I’ve done it to add support for a device. The VEML6075 (UVA & UVB Light Sensor). I hunted up a Micro Python driver for it.
Here is the driver and basic program I use with this chip. It is pure MicroPython - no library. It came from the Waveshare Environment Sensor board.
import time
from machine import Pin, I2C
import math
Gyro = [0,0,0]
Accel = [0,0,0]
Mag = [0,0,0]
pitch = 0.0
roll = 0.0
yaw = 0.0
pu8data=[0,0,0,0,0,0,0,0]
U8tempX=[0,0,0,0,0,0,0,0,0]
U8tempY=[0,0,0,0,0,0,0,0,0]
U8tempZ=[0,0,0,0,0,0,0,0,0]
GyroOffset=[0,0,0]
Ki = 1.0
Kp = 4.50
q0 = 1.0
q1=q2=q3=0.0
angles=[0.0,0.0,0.0]
true =0x01
false =0x00
# define ICM-20948 Device I2C address
I2C_ADD_ICM20948 = 0x68
I2C_ADD_ICM20948_AK09916 = 0x0C
I2C_ADD_ICM20948_AK09916_READ = 0x80
I2C_ADD_ICM20948_AK09916_WRITE = 0x00
# define ICM-20948 Register
# user bank 0 register
REG_ADD_WIA = 0x00
REG_VAL_WIA = 0xEA
REG_ADD_USER_CTRL = 0x03
REG_VAL_BIT_DMP_EN = 0x80
REG_VAL_BIT_FIFO_EN = 0x40
REG_VAL_BIT_I2C_MST_EN = 0x20
REG_VAL_BIT_I2C_IF_DIS = 0x10
REG_VAL_BIT_DMP_RST = 0x08
REG_VAL_BIT_DIAMOND_DMP_RST = 0x04
REG_ADD_PWR_MIGMT_1 = 0x06
REG_VAL_ALL_RGE_RESET = 0x80
REG_VAL_RUN_MODE = 0x01 # Non low-power mode
REG_ADD_LP_CONFIG = 0x05
REG_ADD_PWR_MGMT_1 = 0x06
REG_ADD_PWR_MGMT_2 = 0x07
REG_ADD_ACCEL_XOUT_H = 0x2D
REG_ADD_ACCEL_XOUT_L = 0x2E
REG_ADD_ACCEL_YOUT_H = 0x2F
REG_ADD_ACCEL_YOUT_L = 0x30
REG_ADD_ACCEL_ZOUT_H = 0x31
REG_ADD_ACCEL_ZOUT_L = 0x32
REG_ADD_GYRO_XOUT_H = 0x33
REG_ADD_GYRO_XOUT_L = 0x34
REG_ADD_GYRO_YOUT_H = 0x35
REG_ADD_GYRO_YOUT_L = 0x36
REG_ADD_GYRO_ZOUT_H = 0x37
REG_ADD_GYRO_ZOUT_L = 0x38
REG_ADD_EXT_SENS_DATA_00 = 0x3B
REG_ADD_REG_BANK_SEL = 0x7F
REG_VAL_REG_BANK_0 = 0x00
REG_VAL_REG_BANK_1 = 0x10
REG_VAL_REG_BANK_2 = 0x20
REG_VAL_REG_BANK_3 = 0x30
# user bank 1 register
# user bank 2 register
REG_ADD_GYRO_SMPLRT_DIV = 0x00
REG_ADD_GYRO_CONFIG_1 = 0x01
REG_VAL_BIT_GYRO_DLPCFG_2 = 0x10 # bit[5:3]
REG_VAL_BIT_GYRO_DLPCFG_4 = 0x20 # bit[5:3]
REG_VAL_BIT_GYRO_DLPCFG_6 = 0x30 # bit[5:3]
REG_VAL_BIT_GYRO_FS_250DPS = 0x00 # bit[2:1]
REG_VAL_BIT_GYRO_FS_500DPS = 0x02 # bit[2:1]
REG_VAL_BIT_GYRO_FS_1000DPS = 0x04 # bit[2:1]
REG_VAL_BIT_GYRO_FS_2000DPS = 0x06 # bit[2:1]
REG_VAL_BIT_GYRO_DLPF = 0x01 # bit[0]
REG_ADD_ACCEL_SMPLRT_DIV_2 = 0x11
REG_ADD_ACCEL_CONFIG = 0x14
REG_VAL_BIT_ACCEL_DLPCFG_2 = 0x10 # bit[5:3]
REG_VAL_BIT_ACCEL_DLPCFG_4 = 0x20 # bit[5:3]
REG_VAL_BIT_ACCEL_DLPCFG_6 = 0x30 # bit[5:3]
REG_VAL_BIT_ACCEL_FS_2g = 0x00 # bit[2:1]
REG_VAL_BIT_ACCEL_FS_4g = 0x02 # bit[2:1]
REG_VAL_BIT_ACCEL_FS_8g = 0x04 # bit[2:1]
REG_VAL_BIT_ACCEL_FS_16g = 0x06 # bit[2:1]
REG_VAL_BIT_ACCEL_DLPF = 0x01 # bit[0]
# user bank 3 register
REG_ADD_I2C_SLV0_ADDR = 0x03
REG_ADD_I2C_SLV0_REG = 0x04
REG_ADD_I2C_SLV0_CTRL = 0x05
REG_VAL_BIT_SLV0_EN = 0x80
REG_VAL_BIT_MASK_LEN = 0x07
REG_ADD_I2C_SLV0_DO = 0x06
REG_ADD_I2C_SLV1_ADDR = 0x07
REG_ADD_I2C_SLV1_REG = 0x08
REG_ADD_I2C_SLV1_CTRL = 0x09
REG_ADD_I2C_SLV1_DO = 0x0A
# define ICM-20948 Register end
# define ICM-20948 MAG Register
REG_ADD_MAG_WIA1 = 0x00
REG_VAL_MAG_WIA1 = 0x48
REG_ADD_MAG_WIA2 = 0x01
REG_VAL_MAG_WIA2 = 0x09
REG_ADD_MAG_ST2 = 0x10
REG_ADD_MAG_DATA = 0x11
REG_ADD_MAG_CNTL2 = 0x31
REG_VAL_MAG_MODE_PD = 0x00
REG_VAL_MAG_MODE_SM = 0x01
REG_VAL_MAG_MODE_10HZ = 0x02
REG_VAL_MAG_MODE_20HZ = 0x04
REG_VAL_MAG_MODE_50HZ = 0x05
REG_VAL_MAG_MODE_100HZ = 0x08
REG_VAL_MAG_MODE_ST = 0x10
# define ICM-20948 MAG Register end
MAG_DATA_LEN =6
class ICM20948(object):
def __init__(self,address=I2C_ADD_ICM20948):
self._address = address
self._bus = I2C(0, scl=Pin(21), sda=Pin(20), freq=100000)
bRet=self.icm20948Check() #Initialization of the device multiple times after power on will result in a return error
time.sleep(0.5) #We can skip this detection by delaying it by 500 milliseconds
# user bank 0 register
self._write_byte( REG_ADD_REG_BANK_SEL , REG_VAL_REG_BANK_0)
self._write_byte( REG_ADD_PWR_MIGMT_1 , REG_VAL_ALL_RGE_RESET)
time.sleep(0.1)
self._write_byte( REG_ADD_PWR_MIGMT_1 , REG_VAL_RUN_MODE)
#user bank 2 register
self._write_byte( REG_ADD_REG_BANK_SEL , REG_VAL_REG_BANK_2)
self._write_byte( REG_ADD_GYRO_SMPLRT_DIV , 0x07)
self._write_byte( REG_ADD_GYRO_CONFIG_1 , REG_VAL_BIT_GYRO_DLPCFG_6 | REG_VAL_BIT_GYRO_FS_1000DPS | REG_VAL_BIT_GYRO_DLPF)
self._write_byte( REG_ADD_ACCEL_SMPLRT_DIV_2 , 0x07)
self._write_byte( REG_ADD_ACCEL_CONFIG , REG_VAL_BIT_ACCEL_DLPCFG_6 | REG_VAL_BIT_ACCEL_FS_2g | REG_VAL_BIT_ACCEL_DLPF)
#user bank 0 register
self._write_byte( REG_ADD_REG_BANK_SEL , REG_VAL_REG_BANK_0)
time.sleep(0.1)
self.GyroOffset()
self.MagCheck()
self.WriteSecondary( I2C_ADD_ICM20948_AK09916|I2C_ADD_ICM20948_AK09916_WRITE,REG_ADD_MAG_CNTL2, REG_VAL_MAG_MODE_20HZ)
def Gyro_Accel_Read(self):
self._write_byte( REG_ADD_REG_BANK_SEL , REG_VAL_REG_BANK_0)
data =self._read_block(REG_ADD_ACCEL_XOUT_H, 12)
self._write_byte( REG_ADD_REG_BANK_SEL , REG_VAL_REG_BANK_2)
Accel[0] = (data[0]<<8)|data[1]
Accel[1] = (data[2]<<8)|data[3]
Accel[2] = (data[4]<<8)|data[5]
Gyro[0] = ((data[6]<<8)|data[7]) - GyroOffset[0]
Gyro[1] = ((data[8]<<8)|data[9]) - GyroOffset[1]
Gyro[2] = ((data[10]<<8)|data[11]) - GyroOffset[2]
if Accel[0]>=32767: #Solve the problem that Python shift will not overflow
Accel[0]=Accel[0]-65535
elif Accel[0]<=-32767:
Accel[0]=Accel[0]+65535
if Accel[1]>=32767:
Accel[1]=Accel[1]-65535
elif Accel[1]<=-32767:
Accel[1]=Accel[1]+65535
if Accel[2]>=32767:
Accel[2]=Accel[2]-65535
elif Accel[2]<=-32767:
Accel[2]=Accel[2]+65535
if Gyro[0]>=32767:
Gyro[0]=Gyro[0]-65535
elif Gyro[0]<=-32767:
Gyro[0]=Gyro[0]+65535
if Gyro[1]>=32767:
Gyro[1]=Gyro[1]-65535
elif Gyro[1]<=-32767:
Gyro[1]=Gyro[1]+65535
if Gyro[2]>=32767:
Gyro[2]=Gyro[2]-65535
elif Gyro[2]<=-32767:
Gyro[2]=Gyro[2]+65535
def MagRead(self):
counter=20
while(counter>0):
time.sleep(0.01)
self.icm20948ReadSecondary( I2C_ADD_ICM20948_AK09916|I2C_ADD_ICM20948_AK09916_READ , REG_ADD_MAG_ST2, 1)
if ((pu8data[0] & 0x01)!= 0):
break
counter-=1
if counter!=0:
for i in range(0,8):
self.icm20948ReadSecondary( I2C_ADD_ICM20948_AK09916|I2C_ADD_ICM20948_AK09916_READ , REG_ADD_MAG_DATA , MAG_DATA_LEN)
U8tempX[i] = (pu8data[1]<<8)|pu8data[0]
U8tempY[i] = (pu8data[3]<<8)|pu8data[2]
U8tempZ[i] = (pu8data[5]<<8)|pu8data[4]
Mag[0]=(U8tempX[0]+U8tempX[1]+U8tempX[2]+U8tempX[3]+U8tempX[4]+U8tempX[5]+U8tempX[6]+U8tempX[7])/8
Mag[1]=-(U8tempY[0]+U8tempY[1]+U8tempY[2]+U8tempY[3]+U8tempY[4]+U8tempY[5]+U8tempY[6]+U8tempY[7])/8
Mag[2]=-(U8tempZ[0]+U8tempZ[1]+U8tempZ[2]+U8tempZ[3]+U8tempZ[4]+U8tempZ[5]+U8tempZ[6]+U8tempZ[7])/8
if Mag[0]>=32767: #Solve the problem that Python shift will not overflow
Mag[0]=Mag[0]-65535
elif Mag[0]<=-32767:
Mag[0]=Mag[0]+65535
if Mag[1]>=32767:
Mag[1]=Mag[1]-65535
elif Mag[1]<=-32767:
Mag[1]=Mag[1]+65535
if Mag[2]>=32767:
Mag[2]=Mag[2]-65535
elif Mag[2]<=-32767:
Mag[2]=Mag[2]+65535
def icm20948ReadSecondary(self,u8I2CAddr,u8RegAddr,u8Len):
u8Temp=0
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_3) #swtich bank3
self._write_byte( REG_ADD_I2C_SLV0_ADDR, u8I2CAddr)
self._write_byte( REG_ADD_I2C_SLV0_REG, u8RegAddr)
self._write_byte( REG_ADD_I2C_SLV0_CTRL, REG_VAL_BIT_SLV0_EN|u8Len)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_0) #swtich bank0
u8Temp = self._read_byte(REG_ADD_USER_CTRL)
u8Temp |= REG_VAL_BIT_I2C_MST_EN
self._write_byte( REG_ADD_USER_CTRL, u8Temp)
time.sleep(0.01)
u8Temp &= ~REG_VAL_BIT_I2C_MST_EN
self._write_byte( REG_ADD_USER_CTRL, u8Temp)
for i in range(0,u8Len):
pu8data[i]= self._read_byte( REG_ADD_EXT_SENS_DATA_00+i)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_3) #swtich bank3
u8Temp = self._read_byte(REG_ADD_I2C_SLV0_CTRL)
u8Temp &= ~((REG_VAL_BIT_I2C_MST_EN)&(REG_VAL_BIT_MASK_LEN))
self._write_byte( REG_ADD_I2C_SLV0_CTRL, u8Temp)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_0) #swtich bank0
def WriteSecondary(self,u8I2CAddr,u8RegAddr,u8data):
u8Temp=0
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_3) #swtich bank3
self._write_byte( REG_ADD_I2C_SLV1_ADDR, u8I2CAddr)
self._write_byte( REG_ADD_I2C_SLV1_REG, u8RegAddr)
self._write_byte( REG_ADD_I2C_SLV1_DO, u8data)
self._write_byte( REG_ADD_I2C_SLV1_CTRL, REG_VAL_BIT_SLV0_EN|1)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_0) #swtich bank0
u8Temp = self._read_byte(REG_ADD_USER_CTRL)
u8Temp |= REG_VAL_BIT_I2C_MST_EN
self._write_byte( REG_ADD_USER_CTRL, u8Temp)
time.sleep(0.01)
u8Temp &= ~REG_VAL_BIT_I2C_MST_EN
self._write_byte( REG_ADD_USER_CTRL, u8Temp)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_3) #swtich bank3
u8Temp = self._read_byte(REG_ADD_I2C_SLV0_CTRL)
u8Temp &= ~((REG_VAL_BIT_I2C_MST_EN)&(REG_VAL_BIT_MASK_LEN))
self._write_byte( REG_ADD_I2C_SLV0_CTRL, u8Temp)
self._write_byte( REG_ADD_REG_BANK_SEL, REG_VAL_REG_BANK_0) #swtich bank0
def GyroOffset(self):
s32TempGx = 0
s32TempGy = 0
s32TempGz = 0
for i in range(0,32):
self.Gyro_Accel_Read()
s32TempGx += Gyro[0]
s32TempGy += Gyro[1]
s32TempGz += Gyro[2]
time.sleep(0.01)
GyroOffset[0] = s32TempGx >> 5
GyroOffset[1] = s32TempGy >> 5
GyroOffset[2] = s32TempGz >> 5
def _read_byte(self,cmd):
rdate = self._bus.readfrom_mem(int(self._address), int(cmd), 1)
return rdate[0]
def _read_block(self, reg, length=1):
return self._bus.readfrom_mem(self._address, reg, length)
def _read_u16(self,cmd):
LSB = self._bus.readfrom_mem(self._address,cmd, 1)
MSB = self._bus.readfrom_mem(self._address,cmd+1, 1)
return (MSB << 8) + LSB
def _write_byte(self,cmd,val):
self._bus.writeto_mem(int(self._address), int(cmd), bytes([int(val)]))
time.sleep(0.0001)
def imuAHRSupdata(self,gx, gy,gz,ax,ay,az,mx,my,mz):
norm=0.0
hx = hy = hz = bx = bz = 0.0
vx = vy = vz = wx = wy = wz = 0.0
exInt = eyInt = ezInt = 0.0
ex=ey=ez=0.0
halfT = 0.024
global q0
global q1
global q2
global q3
q0q0 = q0 * q0
q0q1 = q0 * q1
q0q2 = q0 * q2
q0q3 = q0 * q3
q1q1 = q1 * q1
q1q2 = q1 * q2
q1q3 = q1 * q3
q2q2 = q2 * q2
q2q3 = q2 * q3
q3q3 = q3 * q3
norm = float(1/math.sqrt(ax * ax + ay * ay + az * az))
ax = ax * norm
ay = ay * norm
az = az * norm
norm = float(1/math.sqrt(mx * mx + my * my + mz * mz))
mx = mx * norm
my = my * norm
mz = mz * norm
# compute reference direction of flux
hx = 2 * mx * (0.5 - q2q2 - q3q3) + 2 * my * (q1q2 - q0q3) + 2 * mz * (q1q3 + q0q2)
hy = 2 * mx * (q1q2 + q0q3) + 2 * my * (0.5 - q1q1 - q3q3) + 2 * mz * (q2q3 - q0q1)
hz = 2 * mx * (q1q3 - q0q2) + 2 * my * (q2q3 + q0q1) + 2 * mz * (0.5 - q1q1 - q2q2)
bx = math.sqrt((hx * hx) + (hy * hy))
bz = hz
# estimated direction of gravity and flux (v and w)
vx = 2 * (q1q3 - q0q2)
vy = 2 * (q0q1 + q2q3)
vz = q0q0 - q1q1 - q2q2 + q3q3
wx = 2 * bx * (0.5 - q2q2 - q3q3) + 2 * bz * (q1q3 - q0q2)
wy = 2 * bx * (q1q2 - q0q3) + 2 * bz * (q0q1 + q2q3)
wz = 2 * bx * (q0q2 + q1q3) + 2 * bz * (0.5 - q1q1 - q2q2)
# error is sum of cross product between reference direction of fields and direction measured by sensors
ex = (ay * vz - az * vy) + (my * wz - mz * wy)
ey = (az * vx - ax * vz) + (mz * wx - mx * wz)
ez = (ax * vy - ay * vx) + (mx * wy - my * wx)
if (ex != 0.0 and ey != 0.0 and ez != 0.0):
exInt = exInt + ex * Ki * halfT
eyInt = eyInt + ey * Ki * halfT
ezInt = ezInt + ez * Ki * halfT
gx = gx + Kp * ex + exInt
gy = gy + Kp * ey + eyInt
gz = gz + Kp * ez + ezInt
q0 = q0 + (-q1 * gx - q2 * gy - q3 * gz) * halfT
q1 = q1 + (q0 * gx + q2 * gz - q3 * gy) * halfT
q2 = q2 + (q0 * gy - q1 * gz + q3 * gx) * halfT
q3 = q3 + (q0 * gz + q1 * gy - q2 * gx) * halfT
norm = float(1/math.sqrt(q0 * q0 + q1 * q1 + q2 * q2 + q3 * q3))
q0 = q0 * norm
q1 = q1 * norm
q2 = q2 * norm
q3 = q3 * norm
def icm20948Check(self):
bRet=false
if REG_VAL_WIA == self._read_byte(REG_ADD_WIA):
bRet = true
return bRet
def MagCheck(self):
self.icm20948ReadSecondary( I2C_ADD_ICM20948_AK09916|I2C_ADD_ICM20948_AK09916_READ,REG_ADD_MAG_WIA1, 2)
if (pu8data[0] == REG_VAL_MAG_WIA1) and ( pu8data[1] == REG_VAL_MAG_WIA2) :
bRet = true
return bRet
def CalAvgValue(self):
MotionVal = [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]
MotionVal[0]=Gyro[0]/32.8
MotionVal[1]=Gyro[1]/32.8
MotionVal[2]=Gyro[2]/32.8
MotionVal[3]=Accel[0]
MotionVal[4]=Accel[1]
MotionVal[5]=Accel[2]
MotionVal[6]=Mag[0]
MotionVal[7]=Mag[1]
MotionVal[8]=Mag[2]
return MotionVal
def getdata(self):
self.Gyro_Accel_Read()
self.MagRead()
MotionVal=[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]
MotionVal = self.CalAvgValue()
time.sleep(0.1)
self.imuAHRSupdata(MotionVal[0] * 0.0175, MotionVal[1] * 0.0175,MotionVal[2] * 0.0175,
MotionVal[3],MotionVal[4],MotionVal[5],
MotionVal[6], MotionVal[7], MotionVal[8])
pitch = math.asin(-2 * q1 * q3 + 2 * q0* q2)* 57.3
roll = math.atan2(2 * q2 * q3 + 2 * q0 * q1, -2 * q1 * q1 - 2 * q2* q2 + 1)* 57.3
yaw = math.atan2(-2 * q1 * q2 - 2 * q0 * q3, 2 * q2 * q2 + 2 * q3 * q3 - 1) * 57.3
return [roll,pitch,yaw, Accel[0],Accel[1],Accel[2], Gyro[0],Gyro[1],Gyro[2],Mag[0],Mag[1],Mag[2]]
if __name__ == '__main__':
print("\nSense HAT Test Program ...\n")
icm20948 = ICM20948()
while True:
icm = []
icm = icm20948.getdata()
print("/-------------------------------------------------------------/")
print("Roll = %.2f , Pitch = %.2f , Yaw = %.2f" %(icm[0],icm[1],icm[2]))
print("Acceleration: X = %d, Y = %d, Z = %d" %(icm[3],icm[4],icm[5]))
print("Gyroscope: X = %d , Y = %d , Z = %d" %(icm[6],icm[7],icm[8]))
print("Magnetic: X = %d , Y = %d , Z = %d" %(icm[9],icm[10],icm[11]))
More details here:
Hope this helps
At the end of the Instructable it shows how to sense tilt and shake with a very simple game.
Great chip but the gyroscope and magnetometer are still a work in progress!
I rather like this method of supplying drivers for boards. It means that you can easily build a single program, with its necessary drivers, in MicroPython and it allows you to modify the drivers as necessary as I did here:
to overcome the corruption/communication problem with Pico Explorer.
I believe you learn more if you can follow what is really going on.
1 Like
Thanks! That runs on my Pico Explorer! Now it will take a while to study what’s going on.
Tonygo2, do you know of any timing issues with the driver you posted above? I added some lines to display some of the Magnetic output on the Pico Explorer board’s display and now the program runs through about 25 loops, then stops. I’m wondering if there’s something timing critical about the driver, or if there may be conflicts between the ICM20948 and the display’s I2C bus?
It appears the problem lies in the display routine. Clearing and updating the display takes too long(?). The program works – continues to display the output of the 20948 on the terminal – if the display is not cleared every time:
display.set_pen(0, 0, 0)
display.clear()
# writes the reading as text
display.set_pen(0, 255, 0)
display.text("X={:.2f}".format(icm[9]), 50, 30, 0, 4)
display.text("Y={:.2f}".format(icm[10]), 50, 60, 0, 4)
display.text("Z={:.2f}".format(icm[11]), 50, 90, 0, 4)
# update the display
display.update()
My display formatting may be partly to blame too. I haven’t tried to find a better way to format the display.text lines.
Unfortunately, all printing and displaying text takes ages, there is just so much going on adjusting all those individual pixels.