For HyperVisor and ArSim there is the possibility for using shared memory.
On the AR side this is provided with libraries ArIscShm and ArIscEvent
On the GPOS / Host side there is the brisc.dll
The AS help comes with a ST example for AR and a c example for GPOS/host
This is a Python script that is performing the same task as the c example.
It’s not perfect, but it works. Tested with AS 6.0 and Python 3.11
Also thanks to @corne.geerts , I used parts of his code.
import ctypes
from ctypes import cdll, c_char_p, c_void_p, POINTER, c_long
import time
import keyboard
Handle = ctypes.c_int
AR_EVENT_NAME = "AR_Event"
GPOS_EVENT_NAME = "GPOS_Event"
# Execute ShmEcho sample program first by setting start=TRUE. Then execute this script
if __name__ == "__main__":
try:
c_lib = ctypes.CDLL(".\\brisc.dll") # x64\\brisc.dll with python3
ShmOpen = c_lib.briscShmOpen
ShmOpen.restype = ctypes.POINTER(ctypes.c_int) # pointer to int
# open shared memory
Handle = ShmOpen()
print("Handle:",Handle)
# get size of memory
ShmGetSize = c_lib.briscShmGetSize
Size = ShmGetSize(Handle)
print ("Size: ", Size)
# get address of memory
ShmGetAddress = c_lib.briscShmGetAddress
ShmGetAddress.restype = ctypes.POINTER(ctypes.c_char * Size)
DataAddress = ShmGetAddress(Handle)
# create GPOS event
print("Create event GPOS: ", end="")
ShmCreateEvent = c_lib.briscEventCreate
ShmCreateEvent.restype = ctypes.POINTER(ctypes.c_long)
hEventGPOS = ShmCreateEvent(GPOS_EVENT_NAME.encode('utf-8') )
print ("hEventGPOS: ",hEventGPOS)
# open AR event
print("Open event made by AR: ", end="")
ShmOpenEvent = c_lib.briscEventOpen
ShmOpenEvent.restype = ctypes.POINTER(ctypes.c_long)
start_time = time.time()
while time.time() - start_time < 2:
hEventAR = ShmOpenEvent(AR_EVENT_NAME.encode('utf-8'))
if hEventAR != 0:
break
print("... ", end="")
time.sleep(1)
print("hEventAR: ",hEventAR)
# wait for the GPOS event to be triggered by AR
BriscEventWait = c_lib.briscEventWait
BriscEventWait.argtypes = [ctypes.POINTER(ctypes.c_long),ctypes.c_ulong]
if hEventGPOS != 0:
Triggered = BriscEventWait(hEventGPOS,2000)
# get string value from shared memory
data = ctypes.string_at(DataAddress, 10)
print(data.decode('utf-8'))
# write back to memory
new_data = "Hello AR".encode('utf-8') + b'\0'
if len(new_data)<Size:
ctypes.memmove(DataAddress, new_data, len(new_data))
# trigger the event created by AR
if hEventAR != 0:
BriscEventTrigger = c_lib.briscEventTrigger
BriscEventTrigger.argtypes = [POINTER(c_long)]
BriscEventTrigger(hEventAR)
print("Press any key to continue...")
keyboard.read_event()
finally:
c_lib.briscShmClose(Handle)
if hEventGPOS != 0:
c_lib.briscEventClose(hEventGPOS)
print("Event Closed")
