You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.5 KiB
48 lines
1.5 KiB
import gex
|
|
|
|
CMD_WRITE = 0
|
|
CMD_DIRECT_DATA = 1
|
|
CMD_DIRECT_SHIFT = 2
|
|
CMD_DIRECT_CLEAR = 3
|
|
CMD_DIRECT_STORE = 4
|
|
|
|
class SIPO(gex.Unit):
|
|
"""
|
|
Multi-channel SIPO driver
|
|
Designed for loading up to 16 74xx595 or 74xx4094 serial-input-parallel-output shift registers
|
|
The number of drivers can be significantly expanded via daisy-chaining.
|
|
"""
|
|
|
|
def _type(self):
|
|
return 'SIPO'
|
|
|
|
def load(self, buffers, end=0x0000, confirm=True):
|
|
""" Load data - buffers is a list of lists or byte arrays """
|
|
if type(buffers[0]) == int:
|
|
buffers = [buffers]
|
|
|
|
pb = gex.PayloadBuilder()
|
|
pb.u16(end)
|
|
|
|
for b in buffers:
|
|
pb.blob(b)
|
|
|
|
self._send(CMD_WRITE, pb.close(), confirm=confirm)
|
|
|
|
def set_data(self, packed:int, confirm=True):
|
|
""" Manually set the data pins """
|
|
pb = gex.PayloadBuilder()
|
|
pb.u16(packed)
|
|
self._send(CMD_DIRECT_DATA, pb.close(), confirm=confirm)
|
|
|
|
def shift(self, confirm=True):
|
|
""" Manually send a shift pulse (shift data one step further into the registers) """
|
|
self._send(CMD_DIRECT_SHIFT, confirm=confirm)
|
|
|
|
def store(self, confirm=True):
|
|
""" Manually send a store pulse (copy the shift register data to the outputs) """
|
|
self._send(CMD_DIRECT_STORE, confirm=confirm)
|
|
|
|
def clear(self, confirm=True):
|
|
""" Manually send a clear pulse (if connected correctly, this immediately resets the shift register outputs) """
|
|
self._send(CMD_DIRECT_CLEAR, confirm=confirm)
|
|
|