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49 lines
1.5 KiB
49 lines
1.5 KiB
7 years ago
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import gex
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CMD_WRITE = 0
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CMD_DIRECT_DATA = 1
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CMD_DIRECT_SHIFT = 2
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CMD_DIRECT_CLEAR = 3
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CMD_DIRECT_STORE = 4
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class SIPO(gex.Unit):
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"""
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Multi-channel SIPO driver
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Designed for loading up to 16 74xx595 or 74xx4094 serial-input-parallel-output shift registers
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The number of drivers can be significantly expanded via daisy-chaining.
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"""
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def _type(self):
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return 'SIPO'
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7 years ago
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def load(self, buffers, end=0x0000, confirm=True):
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7 years ago
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""" Load data - buffers is a list of lists or byte arrays """
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if type(buffers[0]) == int:
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buffers = [buffers]
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pb = gex.PayloadBuilder()
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7 years ago
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pb.u16(end)
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7 years ago
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for b in buffers:
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pb.blob(b)
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self._send(CMD_WRITE, pb.close(), confirm=confirm)
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def set_data(self, packed:int, confirm=True):
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""" Manually set the data pins """
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pb = gex.PayloadBuilder()
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pb.u16(packed)
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self._send(CMD_DIRECT_DATA, pb.close(), confirm=confirm)
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def shift(self, confirm=True):
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""" Manually send a shift pulse (shift data one step further into the registers) """
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self._send(CMD_DIRECT_SHIFT, confirm=confirm)
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def store(self, confirm=True):
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""" Manually send a store pulse (copy the shift register data to the outputs) """
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self._send(CMD_DIRECT_STORE, confirm=confirm)
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def clear(self, confirm=True):
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""" Manually send a clear pulse (if connected correctly, this immediately resets the shift register outputs) """
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self._send(CMD_DIRECT_CLEAR, confirm=confirm)
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