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# ============================
# mcu_sim.py
# ============================
import
numpy
as
np
import
time
import
tracemalloc
import
contextlib
# ========== 浮点精度限制 ==========
def
as_float32
(
x
):
"""强制使用 float32,模拟 MCU 单精度能力"""
return
np
.
float32
(
x
)
# ========== 内存限制 ==========
@
contextlib
.
contextmanager
def
limit_memory_scope
(
max_bytes
):
"""
max_bytes: 允许最大 RAM(bytes)
"""
tracemalloc
.
start
()
try
:
yield
current
,
peak
=
tracemalloc
.
get_traced_memory
()
if
peak
>
max_bytes
:
raise
MemoryError
(
f"模拟 MCU:内存限制
{
max_bytes
}
字节已超出:峰值
{
peak
}
"
)
finally
:
tracemalloc
.
stop
()
# ========== MCU 控制周期模拟 ==========
@
contextlib
.
contextmanager
def
mcu_cycle
(
period_sec
):
"""
模拟 STM32 的周期执行(如 10ms 控制周期)
若代码耗时超过周期,则表示 MCU 无法实时运行
"""
t0
=
time
.
perf_counter
()
yield
elapsed
=
time
.
perf_counter
()
-
t0
if
elapsed
<
period_sec
:
# 用 sleep 保持周期
time
.
sleep
(
period_sec
-
elapsed
)
else
:
print
(
f"[警告] MCU 周期
{
period_sec
*
1000
:.1f
}
ms 超时,实际耗时
{
elapsed
*
1000
:.1f
}
ms"
)
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