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pdq2: memory write

This commit is contained in:
Robert Jördens 2017-04-07 13:50:17 +02:00
parent b9c61ae2da
commit f13f6eb7be
1 changed files with 15 additions and 13 deletions
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28
artiq/coredevice/pdq2.py
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@ -51,24 +51,16 @@ class PDQ2:
self.bus.set_config_mu(_PDQ2_SPI_CONFIG, write_div, read_div) self.bus.set_config_mu(_PDQ2_SPI_CONFIG, write_div, read_div)
self.bus.set_xfer(self.chip_select, 16, 0) self.bus.set_xfer(self.chip_select, 16, 0)
@kernel
def write(self, data):
"""Write 16 bits of data.
This method advances the timeline by the duration of the SPI transfer
and the required CS high time.
"""
self.bus.write(data << 16)
delay_mu(self.bus.ref_period_mu) # get to 20ns min cs high
@kernel @kernel
def write_reg(self, adr, data, board): def write_reg(self, adr, data, board):
self.write((_PDQ2_CMD(board, 0, adr, 1) << 24) | (data << 16)) self.bus.write((_PDQ2_CMD(board, 0, adr, 1) << 24) | (data << 16))
delay_mu(self.bus.ref_period_mu) # get to 20ns min cs high
@kernel @kernel
def read_reg(self, adr, board): def read_reg(self, adr, board):
self.bus.set_xfer(self.chip_select, 16, 8) self.bus.set_xfer(self.chip_select, 16, 8)
self.write(_PDQ2_CMD(board, 0, adr, 0) << 24) self.bus.write(_PDQ2_CMD(board, 0, adr, 0) << 24)
delay_mu(self.bus.ref_period_mu) # get to 20ns min cs high
self.bus.read_async() self.bus.read_async()
self.bus.set_xfer(self.chip_select, 16, 0) self.bus.set_xfer(self.chip_select, 16, 0)
return self.bus.input_async() & 0xff return self.bus.input_async() & 0xff
@ -99,7 +91,17 @@ class PDQ2:
@kernel @kernel
def write_mem(self, mem, adr, data, board=0xf): def write_mem(self, mem, adr, data, board=0xf):
pass self.bus.set_xfer(self.chip_select, 24, 0)
self.bus.write((_PDQ2_CMD(board, 1, mem, 1) << 24) |
((adr & 0x00ff) << 16) | (adr & 0xff00))
delay_mu(3*self.bus.ref_period_mu - self.bus.xfer_period_mu -
self.bus.write_period_mu)
self.bus.set_xfer(self.chip_select, 16, 0)
for i in len(data)//2:
self.bus.write((data[2*i] << 24) | (data[2*i + 1] << 16))
delay_mu(-self.bus.write_period_mu)
delay_mu(self.bus.write_period_mu + self.bus.ref_period_mu)
# get to 20ns min cs high
@kernel @kernel
def read_mem(self, mem, adr, data, board=0xf): def read_mem(self, mem, adr, data, board=0xf):