kopia lustrzana https://github.com/micropython/micropython
89 wiersze
2.0 KiB
Python
89 wiersze
2.0 KiB
Python
import sys
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try:
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import uctypes
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except ImportError:
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print("SKIP")
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raise SystemExit
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if sys.byteorder != "little":
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print("SKIP")
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raise SystemExit
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desc = {
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# arr is array at offset 0, of UINT8 elements, array size is 2
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"arr": (uctypes.ARRAY | 0, uctypes.UINT8 | 2),
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# arr2 is array at offset 0, size 2, of structures defined recursively
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"arr2": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0}),
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"arr3": (uctypes.ARRAY | 2, uctypes.UINT16 | 2),
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# aligned
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"arr5": (uctypes.ARRAY | 0, uctypes.UINT32 | 1),
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"arr7": (uctypes.ARRAY | 0, 1, {"l": uctypes.UINT32 | 0}),
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"arr8": (uctypes.ARRAY | 0, uctypes.INT8 | 1),
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"arr9": (uctypes.ARRAY | 0, uctypes.INT16 | 1),
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"arr10": (uctypes.ARRAY | 0, uctypes.INT32 | 1),
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"arr11": (uctypes.ARRAY | 0, uctypes.INT64 | 1),
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"arr12": (uctypes.ARRAY | 0, uctypes.UINT64 | 1),
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"arr13": (uctypes.ARRAY | 1, 1, {"l": {}}),
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}
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data = bytearray(8)
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S = uctypes.struct(uctypes.addressof(data), desc)
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# assign byte
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S.arr[0] = 0x11
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print(hex(S.arr[0]))
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assert hex(S.arr[0]) == "0x11"
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# assign word
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S.arr3[0] = 0x2233
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print(hex(S.arr3[0]))
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assert hex(S.arr3[0]) == "0x2233"
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# assign word, with index
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S.arr3[1] = 0x4455
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print(hex(S.arr3[1]))
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assert hex(S.arr3[1]) == "0x4455"
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# assign long, aligned
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S.arr5[0] = 0x66778899
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print(hex(S.arr5[0]))
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assert hex(S.arr5[0]) == "0x66778899"
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print(S.arr5[0] == S.arr7[0].l)
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assert S.arr5[0] == S.arr7[0].l
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# assign int8
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S.arr8[0] = 0x11
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print(hex(S.arr8[0]))
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assert hex(S.arr8[0]) == "0x11"
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# assign int16
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S.arr9[0] = 0x1122
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print(hex(S.arr9[0]))
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assert hex(S.arr9[0]) == "0x1122"
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# assign int32
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S.arr10[0] = 0x11223344
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print(hex(S.arr10[0]))
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assert hex(S.arr10[0]) == "0x11223344"
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# index out of range
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try:
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print(S.arr8[2])
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except IndexError:
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print("IndexError")
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# syntax error in descriptor
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try:
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S.arr13[0].l = 0x11
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except TypeError:
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print("TypeError")
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# operation not supported
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try:
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S.arr13[0] = 0x11
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except TypeError:
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print("TypeError")
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