forked from M-Labs/artiq
pdq2: memory write
This commit is contained in:
parent
b9c61ae2da
commit
f13f6eb7be
@ -51,24 +51,16 @@ class PDQ2:
|
||||
self.bus.set_config_mu(_PDQ2_SPI_CONFIG, write_div, read_div)
|
||||
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
|
||||
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
|
||||
def read_reg(self, adr, board):
|
||||
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.set_xfer(self.chip_select, 16, 0)
|
||||
return self.bus.input_async() & 0xff
|
||||
@ -99,7 +91,17 @@ class PDQ2:
|
||||
|
||||
@kernel
|
||||
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
|
||||
def read_mem(self, mem, adr, data, board=0xf):
|
||||
|
Loading…
Reference in New Issue
Block a user