def DBWriteByOffset(dev, db_num, offset, _type, value):
offset = str(float(offset))
byte = int(offset.split('.')[0])
bit = int(offset.split('.')[1])
_type = _type.lower()
_val_len = byte_array.val_len(_type, None)
raw_bytearray = bytearray([0] * _val_len)
if _type == 'Real'.lower():
snap7.util.set_real(raw_bytearray, 0, value)
elif _type == 'Bool'.lower():
raw_bytearray = dev.read_area(snap7.snap7types.areas['DB'], db_num,
byte, _val_len)
snap7.util.set_bool(raw_bytearray, 0, bit, value)
elif _type == 'DINT'.lower():
byte_array.set_dint(raw_bytearray, 0, value)
elif _type == 'UDINT'.lower() or _type == 'DWORD'.lower():
byte_array.set_udint(raw_bytearray, 0, value)
elif _type == 'Int'.lower():
snap7.util.set_int(raw_bytearray, 0, value)
elif _type == 'UINT'.lower() or _type == 'WORD'.lower():
byte_array.set_uint(raw_bytearray, 0, value)
elif _type == 'USINT'.lower():
byte_array.set_byte(raw_bytearray, 0, value)
elif _type == 'SINT'.lower():
byte_array.set_sint(raw_bytearray, 0, value)
elif _type == 'BYTE'.lower():
byte_array.set_byte(raw_bytearray, 0, value)
elif 'WString'.lower() in _type:
byte_array.set_wstring(raw_bytearray, 0, value,
int((byte_array.val_len(_type, None) / 2) - 2))
elif 'String'.lower() in _type:
# snap7.util.set_string(raw_bytearray, 0, value, byte_array.val_len(_type, None))
byte_array.set_string(raw_bytearray, 0, value,
byte_array.val_len(_type, None) - 2)
elif _type == 'DTL'.lower():
byte_array.set_DTL(raw_bytearray, 0, value)
else:
print('Unkown type', _type)
dev.db_write(db_num, byte, raw_bytearray)
def DBRead(dev, db_num, length, dbitems):
data = dev.read_area(snap7.snap7types.areas['DB'], db_num, 0, length)
obj = DBObject()
for item in dbitems.values():
value = None
offset = int(item[offsetKey].split('.')[0])
_type = item[dataTypeKey].lower()
if _type == 'Real'.lower():
value = snap7.util.get_real(data, offset)
elif _type == 'Bool'.lower():
bit = int(item[offsetKey].split('.')[1])
value = snap7.util.get_bool(data, offset, bit)
elif _type == 'DINT'.lower():
value = byte_array.get_dint(data, offset)
elif _type == 'UDINT'.lower() or _type == 'DWORD'.lower():
value = byte_array.get_udint(data, offset)
elif _type == 'Int'.lower():
value = snap7.util.get_int(data, offset)
elif _type == 'UINT'.lower() or _type == 'WORD'.lower():
value = byte_array.get_uint(data, offset)
elif _type == 'USINT'.lower():
value = byte_array.get_byte(data, offset)
elif _type == 'SINT'.lower():
value = byte_array.get_sint(data, offset)
elif _type == 'BYTE'.lower():
value = byte_array.get_byte(data, offset)
elif 'WString'.lower() in _type:
value = byte_array.get_wstring(data, offset,
byte_array.val_len(_type, None))
elif 'String'.lower() in _type:
# value = snap7.util.get_string(data, offset, m_dictOffsets["String"])
# value = snap7.util.get_string(data, offset, byte_array.val_len(_type, None))
value = byte_array.get_string(data, offset,
byte_array.val_len(_type, None))
elif _type == 'DTL'.lower():
value = byte_array.get_DTL(data, offset)
else:
print('Unkown type', _type)
value = None
obj.__setattr__(item[nameKey], value)
return obj
def DBReadTag(dev, db_num, offset, _type):
offset = str(float(offset))
byte = int(offset.split('.')[0])
bit = int(offset.split('.')[1])
length = byte_array.val_len(_type, None)
data = dev.read_area(snap7.snap7types.areas['DB'], db_num, byte, length)
value = None
_type = _type.lower()
if _type == 'Real'.lower():
value = snap7.util.get_real(data, 0)
elif _type == 'Bool'.lower():
value = snap7.util.get_bool(data, 0, bit)
elif _type == 'DINT'.lower():
value = byte_array.get_dint(data, 0)
elif _type == 'UDINT'.lower() or _type == 'DWORD'.lower():
value = byte_array.get_udint(data, 0)
elif _type == 'Int'.lower():
value = snap7.util.get_int(data, 0)
elif _type == 'UINT'.lower() or _type == 'WORD'.lower():
value = byte_array.get_uint(data, 0)
elif _type == 'USINT'.lower():
value = byte_array.get_byte(data, 0)
elif _type == 'SINT'.lower():
value = byte_array.get_sint(data, 0)
elif _type == 'BYTE'.lower():
value = byte_array.get_byte(data, 0)
elif 'WString'.lower() in _type:
value = byte_array.get_wstring(data, 0,
byte_array.val_len(_type, None))
elif 'String'.lower() in _type:
# value = snap7.util.get_string(data, offset, m_dictOffsets["String"])
# value = snap7.util.get_string(data, 0, byte_array.val_len(_type, None))
value = byte_array.get_string(data, 0, byte_array.val_len(_type, None))
elif _type == 'DTL'.lower():
value = byte_array.get_DTL(data, 0)
else:
print('Unkown type', _type)
value = None
return value
def DBWriteByTag(dev, db_num, item, value):
offset = int(item[offsetKey].split('.')[0])
_type = item[dataTypeKey].lower()
_val_len = byte_array.val_len(_type, None)
raw_bytearray = bytearray([0] * _val_len)
if _type == 'Real'.lower():
snap7.util.set_real(raw_bytearray, 0, value)
elif _type =='Bool'.lower():
raw_bytearray = dev.read_area(snap7.snap7types.areas['DB'], db_num, offset, _val_len)
bit = int(item[offsetKey].split('.')[1])
snap7.util.set_bool(raw_bytearray, 0, bit, value)
elif _type == 'DINT'.lower():
byte_array.set_dint(raw_bytearray, 0, value)
elif _type == 'UDINT'.lower() or _type == 'DWORD'.lower():
byte_array.set_udint(raw_bytearray, 0, value)
elif _type == 'Int'.lower():
snap7.util.set_int(raw_bytearray, 0, value)
elif _type == 'UINT'.lower() or _type == 'WORD'.lower() :
byte_array.set_uint(raw_bytearray, 0, value)
elif _type == 'USINT'.lower():
byte_array.set_byte(raw_bytearray, 0, value)
elif _type == 'SINT'.lower():
byte_array.set_sint(raw_bytearray, 0, value)
elif _type == 'BYTE'.lower():
byte_array.set_byte(raw_bytearray, 0, value)
elif 'String'.lower() in _type:
# value = snap7.util.get_string(data, offset, m_dictOffsets["String"])
# snap7.util.set_string(raw_bytearray, 0, value, val_len(_type, None))
byte_array.set_string(raw_bytearray, 0, value, 250)
elif _type == 'DTL'.lower():
byte_array.set_DTL(raw_bytearray, 0, value)
else:
print('Unkown type', _type)
dev.db_write(db_num, offset, raw_bytearray)
def get_db_size(_dictItems, _dataTypeKey, _offsetKey):
'''
Example:
lstOffsets: ['0.0', '4.0', '6.0', '8.0']
lstTypes: ['Real', 'Bool', 'Int', 'String']
idx: 3
'''
lstOffsets, lstTypes = [float(x[_offsetKey]) for x in _dictItems.values()], [x[_dataTypeKey] for x in _dictItems.values()]
idx = lstOffsets.index(max(lstOffsets))
# print(f"lstOffsets: {lstOffsets}, lstTypes: {lstTypes}, idx: {idx}")
# lastByte = int(max(lstOffsets).split('.')[0])+(m_dictOffsets[lstTypes[idx]])
lastByte = int(str(max(lstOffsets)).split('.')[0])+(byte_array.val_len(lstTypes[idx], None))
return lastByte