Finished adding commands
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# errata
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* In the function 'get_switching_step()', the documentation of the relevant command (Get Step 205_1 on p54) states that the returned array is 6 bytes long in the format
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* [0] = '205'
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* [1] = step_index
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* [2] = swtich_state
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* [3] = dwell_0
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* [4] = dwell_1
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* [5] = dwell_units
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* This arrangement is incorrect, at least for firmware version 'A3' which is all I have access to. The actual returned array is as follows:
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* [0] = '205'
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* [2] = swtich_state
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* [3] = dwell_0
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* [4] = dwell_1
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* [5] = dwell_units
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* This means that from the returned array alone the relevant step cannot be determined
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121
SP4T.py
121
SP4T.py
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@ -2,6 +2,9 @@
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# Author: George 'Joj' Travers
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#
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# Reference: https://www.minicircuits.com/softwaredownload/Prog_Manual-Solid_State_Switch.pdf
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#
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# command data is sent and recieved in decimal for some reason, don't ask why idk
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# ex: command 205_1 refers to the first two bytes sent in the 64-byte transmit array
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def get_device_model(dev):
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# Returns the Mini-Circuits part number of the connected switch
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@ -102,41 +105,123 @@ def get_num_switching_steps(dev):
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def set_switching_step(dev, step_index, switch_state, dwell_0, dwell_1, dwell_units):
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# Configures the state and dwell time of a single step within the pre-defined switching sequence
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# command 204_1
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command = [204,1]
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command = [204,1,step_index,switch_state,dwell_0,dwell_1,dwell_units]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 204 :
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return "Error: Invalid response"
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return "Switching step configured"
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def get_switching_step(dev, step_index):
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# Returns the state and dwell time of a single step within the pre-defined switching sequence
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# command 205_1
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command = [205,1,step_index]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 205 :
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return "Error: Invalid response"
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return f"Number of steps: {ret_arr[1]}"
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return ret_arr[:5]
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def set_switching_direction(dev, direction):
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# Sets the direction in which the sequence of switch states which will be executed
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# command 204_2
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command = [204,2,direction]
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def get_switching_step(dev):
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return
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def set_switching_direction(dev):
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return
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 204 :
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return "Error: Invalid response"
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return "Switching direction configured"
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def get_switching_direction(dev):
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return
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# Returns the direction in which the sequence of switch states will be executed
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# command 205_2
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command = [205,2]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 205 :
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return "Error: Invalid response"
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if ret_arr[1] == 0 :
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return "Forward"
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elif ret_arr[1] == 1 :
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return "Reverse"
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elif ret_arr[1] == 2 :
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return "Bi_Directional"
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else :
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return "Error: Invalid response"
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def set_num_switching_cycles(dev, cycles_0, cycles_1):
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# Sets the number of times that the complete switching sequence will be executed
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# This setting will beignored if the switch sequence has been configured to execute in continuous mode
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# command 204_4
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command = [204,4,cycles_0,cycles_1]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 204 :
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return "Error: Invalid response"
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return "Switching cycles configured"
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def set_num_switching_cycles():
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return
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def get_num_switching_cycles(dev):
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# Returns the number of times that the complete switching sequence will be executed
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# This setting will be ignored if the switch sequence has been configured to execute in continuous mode
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# command 205_4
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command = [205,4]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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def get_num_switching_cycles():
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return
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if ret_arr[0] != 205 :
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return "Error: Invalid response"
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return ret_arr[:3]
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def set_switching_mode(dev, mode):
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# Configures whether the switch sequence will be executed continuously or for a pre-defined number of cycles
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# With continuous mode enabled, the sequence will repeat from the time the sequence is enabled by the user until the time it is disabled by the user; the setting for number of cycles will be ignored
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# With continuous mode disabled the sequence will repeat according to the setting for number of cycle
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# command 204_3
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command = [204,3, mode]
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def set_switching_mode():
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return
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 204 :
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return "Error: Invalid response"
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return "Switching mode set"
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def get_switching_mode():
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return
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def get_switching_mode(dev):
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# Indicates whether or not the switching sequence is configured to operate in continuous mode
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# With continuous mode enabled, the sequence will repeat from the time the sequence is enabled by the user until the time it is disabled by the user; the setting for number of cycles will be ignored
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# With continuous mode disabled the sequence will repeat according to the setting for number of cycles.
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# command 205_3
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command = [205,3]
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def start_stop_switching_mode():
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return
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 205 :
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return "Error: Invalid response"
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return f"Continuous mode: {ret_arr[1]}"
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def start_stop_switching_mode(dev, mode):
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# Starts or stops the pre-defined switching sequence
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# The sequence will not operate unless all required parameters have been configured correctly
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# command 204_5
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command = [204,5,mode]
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dev.write(0x01,command)
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ret_arr = dev.read(0x81,64)
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if ret_arr[0] != 204 :
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return "Error: Invalid response"
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return "Switching sequence set"
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@ -0,0 +1,47 @@
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import usb.core, usb.util
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import sys
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# import bindings from directory above example folder
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sys.path.append('../')
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from SP4T import *
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# connect to USB device
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dev = usb.core.find(idVendor=0x20ce, idProduct=0x0022)
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if dev is None:
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print("sad")
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raise ValueError('Device not found')
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for configuration in dev:
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for interface in configuration:
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ifnum = interface.bInterfaceNumber
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if not dev.is_kernel_driver_active(ifnum):
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continue
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try:
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dev.detach_kernel_driver(ifnum)
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except {usb.core.USBError, e}:
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pass
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#set device config
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dev.set_configuration()
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# testing bindings
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print(get_device_model(dev))
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print(get_device_serial(dev))
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print(get_sp4t_state(dev))
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print(set_sp4t_state(dev, 4))
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print(get_sp4t_state(dev))
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print(get_firmware(dev))
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print(get_num_switching_steps(dev))
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print(set_num_switching_steps(dev, 10))
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print(get_num_switching_steps(dev))
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print(set_switching_step(dev, 1, 3, 0, 5, 0))
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print(get_switching_step(dev, 1)) # returns step 1 switch settings
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print(get_switching_direction(dev))
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