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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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25
artiq/coredevice/pdq2.py
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@ -35,7 +35,7 @@ class PDQ2:
self.chip_select = chip_select self.chip_select = chip_select
@kernel @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 """Configure the SPI bus and the SPI transaction parameters
for this device. This method has to be called before any other method 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. 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 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 int(self.bus.input_async() & 0xff) # FIXME: m-labs/artiq#713
@kernel @kernel
def write_config(self, reset=0, clk2x=0, enable=1, def write_config(self, reset=0, clk2x=0, enable=1,
@ -94,7 +94,7 @@ class PDQ2:
return self.read_reg(_PDQ2_ADR_FRAME, board) return self.read_reg(_PDQ2_ADR_FRAME, board)
@kernel @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.set_xfer(self.chip_select, 24, 0)
self.bus.write((_PDQ2_CMD(board, 1, mem, 1) << 24) | self.bus.write((_PDQ2_CMD(board, 1, mem, 1) << 24) |
((adr & 0x00ff) << 16) | (adr & 0xff00)) ((adr & 0x00ff) << 16) | (adr & 0xff00))
@ -108,4 +108,21 @@ class PDQ2:
@kernel @kernel
def read_mem(self, mem, adr, data, board=0xf): def read_mem(self, mem, adr, data, board=0xf):
pass 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