circuitpython/tests/micropython/viper_ptr16_load.py

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# test loading from ptr16 type
# only works on little endian machines
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@micropython.viper
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def get(src: ptr16) -> int:
return src[0]
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@micropython.viper
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def get1(src: ptr16) -> int:
return src[1]
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@micropython.viper
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def memadd(src: ptr16, n: int) -> int:
sum = 0
for i in range(n):
sum += src[i]
return sum
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@micropython.viper
def memadd2(src_in) -> int:
src = ptr16(src_in)
n = int(len(src_in)) >> 1
sum = 0
for i in range(n):
sum += src[i]
return sum
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b = bytearray(b"1234")
print(b)
print(get(b), get1(b))
print(memadd(b, 2))
print(memadd2(b))