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pdq2: mem_read

This commit is contained in:
Robert Jördens 2017-04-13 13:38:13 +02:00
parent 20652ce128
commit 8446cccb4e
1 changed files with 21 additions and 4 deletions
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23
artiq/coredevice/pdq2.py
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@ -35,7 +35,7 @@ class PDQ2:
self.chip_select = chip_select
@kernel
def setup_bus(self, write_div=4, read_div=15):
def setup_bus(self, write_div=24, read_div=64):
"""Configure the SPI bus and the SPI transaction parameters
for this device. This method has to be called before any other method
if the bus has been used to access a different device in the meantime.
@ -64,7 +64,7 @@ class PDQ2:
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
return int(self.bus.input_async() & 0xff) # FIXME: m-labs/artiq#713
@kernel
def write_config(self, reset=0, clk2x=0, enable=1,
@ -94,7 +94,7 @@ class PDQ2:
return self.read_reg(_PDQ2_ADR_FRAME, board)
@kernel
def write_mem(self, mem, adr, data, board=0xf):
def write_mem(self, mem, adr, data, board=0xf): # FIXME: m-labs/artiq#714
self.bus.set_xfer(self.chip_select, 24, 0)
self.bus.write((_PDQ2_CMD(board, 1, mem, 1) << 24) |
((adr & 0x00ff) << 16) | (adr & 0xff00))
@ -108,4 +108,21 @@ class PDQ2:
@kernel
def read_mem(self, mem, adr, data, board=0xf):
self.bus.set_xfer(self.chip_select, 24, 8)
self.bus.write((_PDQ2_CMD(board, 1, mem, 0) << 24) |
((adr & 0x00ff) << 16) | (adr & 0xff00))
delay_mu(-self.bus.write_period_mu-3*self.bus.ref_period_mu)
self.bus.set_xfer(self.chip_select, 0, 16)
for i in range(len(data)//2):
self.bus.write(0)
delay_mu(-self.bus.write_period_mu-3*self.bus.ref_period_mu)
self.bus.read_async()
d = self.bus.input_async()
data[2*i] = (d >> 8) & 0xff
data[2*i + 1] = d & 0xff
return int(self.bus.input_async() & 0xff) # FIXME: m-labs/artiq#713
delay_mu(self.bus.write_period_mu + self.bus.ref_period_mu)
# get to 20ns min cs high
self.bus.set_xfer(self.chip_select, 16, 0)
pass