27 lines
660 B
Python
27 lines
660 B
Python
from registers import *
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class SPI(RegisterRegion):
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def __init__(self, spiwid, spi_PI, origin, **regs):
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self.spiwid = spiwid
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self.PI = spi_PI
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super().__init__(origin, **regs)
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def send(self, val, force=False):
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if self.PI.v != 0 and not force:
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raise Exception("SPI is controlled by another master")
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self.PI.v = 0
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self.arm.v = 0
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while self.finished_or_ready.v == 0:
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pass
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self.to_slave.v = val
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self.arm.v = 1
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while self.finished_or_ready.v == 0:
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pass
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read_val = self.from_slave.v
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self.arm.v = 0
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return read_val
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