ParametrizeCamera_AreaScanIOSettings.py

Configure IO Settings of Area Scan Cameras

It shows how to configure trigger node IO settings of area scan cameras.

# -- coding: utf-8 --

import sys
import platform
import os


# Compatible with different operating systems to load DDL
currentsystem = platform.system()
if currentsystem == 'Windows':
    sys.path.append(os.path.join(os.getenv('MVCAM_COMMON_RUNENV'), "Samples", "Python", "MvImport"))
else:
    sys.path.append(os.path.join("..", "..", "MvImport"))

from MvCameraControl_class import *


# Compatible with input processing of Python 2.X and 3.X
if sys.version_info[0] < 3:
    # Python 2.x
    input_func = raw_input
else: 
    # Python 3.x
    input_func = input

# Decoding Characters
def decoding_char(ctypes_char_array):
    """
    Safely decode a string from a ctypes character array.
    Compatible with Python 2.x and 3.x, as well as 32-bit and 64-bit environments.
    """
    byte_str = memoryview(ctypes_char_array).tobytes()
    
    # Truncate at the first null character
    null_index = byte_str.find(b'\x00')
    if null_index != -1:
        byte_str = byte_str[:null_index]
    
    # Attempt to decode using multiple encodings
    for encoding in ['gbk', 'utf-8', 'latin-1']:
        try:
            return byte_str.decode(encoding)
        except UnicodeDecodeError:
            continue
    
    # If all encodings fail, use a replacement strategy
    return byte_str.decode('latin-1', errors='replace')

fun_ctype = CFUNCTYPE

stFrameInfo = POINTER(MV_FRAME_OUT_INFO_EX)
pData = POINTER(c_ubyte)
FrameInfoCallBack = fun_ctype(None, pData, stFrameInfo, c_void_p)

def image_callback(pData, pFrameInfo, pUser):
        stFrameInfo = cast(pFrameInfo, POINTER(MV_FRAME_OUT_INFO_EX)).contents
        if stFrameInfo:
            print("get one frame: Width[%d], Height[%d], nFrameNum[%d]" % (stFrameInfo.nWidth, stFrameInfo.nHeight, stFrameInfo.nFrameNum))

CALL_BACK_FUN = FrameInfoCallBack(image_callback)

if __name__ == "__main__":

    try:
        # Initialize SDK resources
        MvCamera.MV_CC_Initialize()

        SDKVersion = MvCamera.MV_CC_GetSDKVersion()
        print ("SDKVersion[0x%x]" % SDKVersion)
        
        deviceList = MV_CC_DEVICE_INFO_LIST()
        tlayerType = (MV_GIGE_DEVICE | MV_USB_DEVICE | MV_GENTL_CAMERALINK_DEVICE
                      | MV_GENTL_CXP_DEVICE | MV_GENTL_XOF_DEVICE)

        # Enumerate devices
        ret = MvCamera.MV_CC_EnumDevices(tlayerType, deviceList)
        if ret != 0:
            print("enum devices fail! ret[0x%x]" % ret)
            sys.exit()

        if deviceList.nDeviceNum == 0:
            print("find no device!")
            sys.exit()

        print("Find %d devices!" % deviceList.nDeviceNum)

        for i in range(0, deviceList.nDeviceNum):
            mvcc_dev_info = cast(deviceList.pDeviceInfo[i], POINTER(MV_CC_DEVICE_INFO)).contents
            if mvcc_dev_info.nTLayerType == MV_GIGE_DEVICE or mvcc_dev_info.nTLayerType == MV_GENTL_GIGE_DEVICE:
                print("\ngige device: [%d]" % i)
                strModeName = decoding_char(mvcc_dev_info.SpecialInfo.stGigEInfo.chModelName)
                print("device model name: %s" % strModeName)
                
                strSerialNumber = decoding_char(mvcc_dev_info.SpecialInfo.stGigEInfo.chSerialNumber)
                print("device serial number: %s" % strSerialNumber)
                
                nip1 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0xff000000) >> 24)
                nip2 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x00ff0000) >> 16)
                nip3 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x0000ff00) >> 8)
                nip4 = (mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x000000ff)
                print("current ip: %d.%d.%d.%d\n" % (nip1, nip2, nip3, nip4))
            elif mvcc_dev_info.nTLayerType == MV_USB_DEVICE:
                print("\nu3v device: [%d]" % i)
                strModeName = decoding_char(mvcc_dev_info.SpecialInfo.stUsb3VInfo.chModelName)
                print("device model name: %s" % strModeName)

                strSerialNumber = decoding_char(mvcc_dev_info.SpecialInfo.stUsb3VInfo.chSerialNumber)
                print("device serial number: %s" % strSerialNumber)
            elif mvcc_dev_info.nTLayerType == MV_GENTL_CAMERALINK_DEVICE:
                print("\nCML device: [%d]" % i)
                strModeName = decoding_char(mvcc_dev_info.SpecialInfo.stCMLInfo.chModelName)
                print("device model name: %s" % strModeName)

                strSerialNumber = decoding_char(mvcc_dev_info.SpecialInfo.stCMLInfo.chSerialNumber)
                print("device serial number: %s" % strSerialNumber)
            elif mvcc_dev_info.nTLayerType == MV_GENTL_CXP_DEVICE:
                print("\nCXP device: [%d]" % i)
                strModeName = decoding_char(mvcc_dev_info.SpecialInfo.stCXPInfo.chModelName)
                print("device model name: %s" % strModeName)

                strSerialNumber = decoding_char(mvcc_dev_info.SpecialInfo.stCXPInfo.chSerialNumber)
                print("device serial number: %s" % strSerialNumber)
            elif mvcc_dev_info.nTLayerType == MV_GENTL_XOF_DEVICE:
                print("\nXoF device: [%d]" % i)
                strModeName = decoding_char(mvcc_dev_info.SpecialInfo.stXoFInfo.chModelName)
                print("device model name: %s" % strModeName)

                strSerialNumber = decoding_char(mvcc_dev_info.SpecialInfo.stXoFInfo.chSerialNumber)
                print("device serial number: %s" % strSerialNumber)

        nConnectionNum = input_func("please input the number of the device to connect:")

        if int(nConnectionNum) >= deviceList.nDeviceNum:
            print("input error!")
            sys.exit()

        # Create a camera instance
        cam = MvCamera()

        # Select a device, and create a handle
        stDeviceList = cast(deviceList.pDeviceInfo[int(nConnectionNum)], POINTER(MV_CC_DEVICE_INFO)).contents

        ret = cam.MV_CC_CreateHandle(stDeviceList)
        if ret != 0:
            raise Exception("create handle fail! ret[0x%x]" % ret)

        # Turn on the device
        ret = cam.MV_CC_OpenDevice(MV_ACCESS_Exclusive, 0)
        if ret != 0:
            raise Exception("open device fail! ret[0x%x]" % ret)

        # Get optimal packet size (only supported by GigE devices)
        if stDeviceList.nTLayerType == MV_GIGE_DEVICE or stDeviceList.nTLayerType == MV_GENTL_GIGE_DEVICE:
            nPacketSize = cam.MV_CC_GetOptimalPacketSize()
            if int(nPacketSize) > 0:
                ret = cam.MV_CC_SetIntValue("GevSCPSPacketSize", nPacketSize)
                if ret != 0:
                    print("Warning: Set Packet Size fail! ret[0x%x]" % ret)
            else:
                print("Warning: Get Packet Size fail! ret[0x%x]" % nPacketSize)

        # Set Line0 as the IO input. Line2 is also available with a lower delay
        print("Now set IO input...")
        # Set trigger mode to on
        ret = cam.MV_CC_SetEnumValueByString("TriggerMode", "On")
        if ret != 0:
            raise Exception("set trigger mode on fail! ret[0x%x]" % ret)

        # Set trigger source to Line0
        ret = cam.MV_CC_SetEnumValueByString("TriggerSource", "Line0")
        if ret != 0:
            raise Exception("set trigger source fail! ret[0x%x]" % ret)

        # Set trigger edge (TriggerActivation) to RisingEdge
        ret = cam.MV_CC_SetEnumValueByString("TriggerActivation", "RisingEdge")
        if ret != 0:
            raise Exception("set trigger activation fail! ret[0x%x]" % ret)

        # Set trigger delay time
        ret = cam.MV_CC_SetFloatValue("TriggerDelay", 0)
        if ret != 0:
            raise Exception("set trigger delay fail! ret[0x%x]" % ret)

        # Disable TriggerCacheEnable, and you can enable it according to the actual demand
        ret = cam.MV_CC_SetBoolValue("TriggerCacheEnable", False)
        if ret != 0:
            raise Exception("set trigger cache enable fail! ret[0x%x]" % ret)

        # Set LineSelector to Line0
        ret = cam.MV_CC_SetEnumValueByString("LineSelector", "Line0")
        if ret != 0:
            raise Exception("set line selector fail! ret[0x%x]" % ret)

        # Set the filtering time (us) for Line0. Increase it appropriately if there are false triggers
        ret = cam.MV_CC_SetIntValueEx("LineDebouncerTime", 50)
        if ret != 0:
            raise Exception("set line debouncer time fail! ret[0x%x]" % ret)

        # Set Line1 as the IO output. Line2 is also available with a lower delay. This is used to control external light source and other devices
        print("Now set IO output...")
        # Set LineSelector to Line1
        ret = cam.MV_CC_SetEnumValueByString("LineSelector", "Line1")
        if ret != 0:
            raise Exception("set line selector fail! ret[0x%x]" % ret)

        # Set LineSource to ExposureStartActive
        ret = cam.MV_CC_SetEnumValueByString("LineSource", "ExposureStartActive")
        if ret != 0:
            raise Exception("set line source fail! ret[0x%x]" % ret)

        # Enable StrobeEnable
        ret = cam.MV_CC_SetBoolValue("StrobeEnable", True)
        if ret != 0:
            raise Exception("set strobe enable fail! ret[0x%x]" % ret)

        # Set duration of output channel (StrobeLineDuration), unit: us
        ret = cam.MV_CC_SetIntValueEx("StrobeLineDuration", 0)
        if ret != 0:
            raise Exception("set strobe line duration fail! ret[0x%x]" % ret)

        # Set the delay time of output line (StrobeLineDelay), unit: us
        ret = cam.MV_CC_SetIntValueEx("StrobeLineDelay", 0)
        if ret != 0:
            raise Exception("set strobe line delay fail! ret[0x%x]" % ret)

        # Set pre-delay time of output channel (StrobeLinePreDelay), unit: us
        ret = cam.MV_CC_SetIntValueEx("StrobeLinePreDelay", 0)
        if ret != 0:
            raise Exception("set strobe line pre-delay fail! ret[0x%x]" % ret)

        #Register an image grabbing callback
        ret = cam.MV_CC_RegisterImageCallBackEx(CALL_BACK_FUN, None)
        if ret != 0:
            raise Exception("register image callback fail! ret[0x%x]" % ret)

        # Start grabbing images
        ret = cam.MV_CC_StartGrabbing()
        if ret != 0:
            raise Exception("start grabbing fail! ret[0x%x]" % ret)
        else:
            print("start grabbing success")

        print ("press Enter key to stop grabbing.")
        input_func()

        # Stop grabbing images
        ret = cam.MV_CC_StopGrabbing()
        if ret != 0:
            raise Exception("stop grabbing fail! ret[0x%x]" % ret)

        # Turn off the device
        ret = cam.MV_CC_CloseDevice()
        if ret != 0:
            raise Exception("close device fail! ret[0x%x]" % ret)

        # Destroy the handle
        cam.MV_CC_DestroyHandle()

    except Exception as e:
        print(e)
        cam.MV_CC_CloseDevice()
        cam.MV_CC_DestroyHandle()
    finally:
        # Release SDK resources
        MvCamera.MV_CC_Finalize()