bliptrip
commented
3 years ago Hey njbuch. I see that you didn't get help on this issue (or they sent you a private message). Did you ever get source code for this? If not, I'm not sure why they didn't put the code on Github -- either they don't want to, or it's just a mistake and the support is awful.
I found through an strace dump that they were essentially opening an fd on '/dev/i2c-10'. In python, try this with 'ioctl' module (or write equivalent in C):
import os
import ioctl
import struct
fd = os.open('/dev/i2c-10', os.O_RDWR)
camdriver = ioctl.IOCTL.IO(b'\x07',0x6)
focus_val = 132
camdriver.perform(fd, 0xc) #Set i2c bus to force write as slave address (0x76) at 7-bit address 0xc.
os.write(fd, struct.pack('>H', focus_val << 4)) #Write focus value, but shift by 4 bytes to left and pack as 2-byte unsigned short in big-endian formatNOTE: You will need to be running the pi camera for this to work -- using raspivid or raspistill on command-line. Otherwise, if you view the library in text editor, there seem to be comments indicating that some of the BCM GPIO pins are designated for powering up the camera -- I guess without this, the i2c module that interfaces with their stepper motor will not be powered. The GPIO pins used to power the camera will vary per RPi model.
ArduCAM
surak
Hello. I cannot find the sourcecode for the libarducam_vcm library which is fundamental to the motorized focus camera. Would need that to move into long term support for our device.