Finishing and testing the driver
This commit is contained in:
parent
3a58156427
commit
ac5f5e1637
2 changed files with 335 additions and 46 deletions
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@ -1,4 +1,4 @@
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"""An I2C driver for the ClusterCTRL/ClusterHAT device(s)."""
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"""An I2C driver for the ClusterCTRL/ClusterHAT family of device(s)."""
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from enum import Enum
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from itertools import chain, repeat
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@ -10,8 +10,14 @@ from typing import NamedTuple, Union
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log = logging.getLogger(__name__)
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# Variable source import "smbus"
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# - smbus can come from i2c-dev (host package, c ext.)
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# - smbus2 is a PyPi hosted pure Python implementation
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#
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# In order to support reasonable packaging and deployment, we want to prefer
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# smbus and fall back to smbus2 if it isn't available.
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smbus = None
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if not smbus:
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try:
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import smbus
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@ -51,11 +57,12 @@ I2C_ADDRESS = 0x20
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class BoardType(Enum):
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DA = 0x00 # Unknown, presunably a prototype
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SINGLE = 0x01 # Do the 'single' and 'triple' really use the same board ID?
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TRIPLE = 0x01 # ???
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PHAT = 0x02 # The ClusterHAT boards
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CTRL = 0x02 # The ClusterCTRL boards
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A6 = 0x03 # https://clusterctrl.com/p/aplus6
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STACK = 0x04 # https://shop.pimoroni.com/products/clusterctrl-stack
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SINGLE = 0x01 # Do the 'single' and 'triple' really use the same board ID?
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TRIPLE = 0x01
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PHAT = 0x02
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class Status(Enum):
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@ -113,12 +120,12 @@ class Cmd(Enum):
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GET_USTATUS = 0x14 # Get Px USBBOOT status (data0=x)
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SET_ORDER = 0x15 # Set order (data0=order)
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SAVE = 0xF0 # Save current PWR/P1-LED/P2-LED/P1/P2/Order/Mode to EEPROM
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SAVEDEFAULTS = 0xF1 # Save factory defaults
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SAVE_DEFAULTS = 0xF1 # Save factory defaults
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GET_DATA = 0xF2 # Get DATA (Temps/ADC/etc.)
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SAVE_ORDER = 0xF3 # Save order to EEPROM
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SAVE_USBBOOT = 0xF4 # Save usbboot status to EEPROM
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SAVE_POS = 0xF5 # Save Power On State to EEPROM
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SAVE_LED = 0xF6 # Save LED to EEPROM
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SAVE_LEDS = 0xF6 # Save LED to EEPROM
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NOP = 0x90 # Do nothing
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@ -133,21 +140,25 @@ class Data(Enum):
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FANSTATUS = 0x04 # Read fan status
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class PiID(NamedTuple):
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"""Represent Pi IDs as something somewhat unique; a CTRL/HAT id and the Pi ID.
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class PiRef(NamedTuple):
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"""An ID for a specific Pi/PiZero controlled by a Cluster{CTRL,HAT}.
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These IDs are expected to be unique at the host level; not at the cluster level.
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"""
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ctrl_id: int
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controller_id: int
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pi_id: int
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def __repr__(self) -> str:
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return f"<PiID {self.ctrl_id:03d}-{self.pi_id:02d}>"
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return f"<PiRef {self.controller_id:d}-{self.pi_id:d}>"
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class ClusterCTRLv2Driver(object):
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def __init__(self, bus: smbus2.SMBus, address: int = I2C_ADDRESS, delay: int = 0, clear = False):
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def __init__(self,
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bus: smbus.SMBus,
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address: int = I2C_ADDRESS,
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delay: int = 0,
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clear: bool = False):
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"""Initialize a ClusterCTRL/ClusterHAT driver instance for a given bus device."""
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self._bus = bus
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self._address = address
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@ -160,8 +171,11 @@ class ClusterCTRLv2Driver(object):
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except:
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raise ValueError("Cannot communicate with a ClusterCTRL/ClusterHAT on the given bus")
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self._post_init()
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def _post_init(self):
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# This is a firmware default value indicating an uninitialized board.
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# Randomize it if present.
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# Randomize it if present and the user hasn't told us not to.
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if self.get_order() == 20:
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v = 20
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r = SystemRandom()
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@ -231,32 +245,42 @@ class ClusterCTRLv2Driver(object):
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# Return the (mostly) meaningful return code
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return self._read(Reg.DATA0)
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def _id(self, id: PiID) -> int:
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"""Validate a logical ID and convert it to a numeric one."""
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assert self.min_pi <= id <= self.max_pi
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assert self.get_order() == id.ctrl_id
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return id.pi_id
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def _id(self, id: Union[PiRef, int]) -> int:
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"""Validate a user-provided ID and convert it to a numeric one."""
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if isinstance(id, PiRef):
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# Yes this is backwards, but its' most convenient for sharing validation
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assert self.get_order() == id.controller_id
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id = id.pi_id
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elif isinstance(id, int):
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pass
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else:
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raise ValueError(f"Expected an int or PiRef, got {type(id)}")
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maxpi = self._read(Reg.MAXPI)
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if 0 <= id <= maxpi:
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return id
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else:
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raise ValueError("Expected an id in [0,{maxpi:d}], got {id:d}")
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@property
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def min_pi(self):
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"""Get the minimum supported Pi ID on this controller."""
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return PiID(self.get_order(), 1)
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return PiRef(self.get_order(), 1)
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@property
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@once
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def max_pi(self):
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"""Get the maximum supported Pi ID on this controller."""
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return PiID(self.get_order(), self._read(Reg.MAXPI))
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return PiRef(self.get_order(), self._read(Reg.MAXPI))
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@property
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def pi_ids(self):
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def pis(self):
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"""Iterate over the IDs of Pis which could be connected to this controller."""
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order = self.get_order()
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for i in range(1, 6):
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yield PiID(order, i)
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maxpi = self._read(Reg.MAXPI)
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for i in range(1, maxpi + 1):
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yield PiRef(order, i)
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@property
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def type(self) -> BoardType:
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@ -287,7 +311,7 @@ class ClusterCTRLv2Driver(object):
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def eeprom_reset(self):
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"""Reset EEPROM to factory/firmware default value(s)."""
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return self._call(Cmd.SAVEDEFAULTS)
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return self._call(Cmd.SAVE_DEFAULTS)
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def eeprom_save_powerstate(self):
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"""Persist the current power state to EEPROM."""
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@ -297,7 +321,7 @@ class ClusterCTRLv2Driver(object):
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def eeprom_save_leds(self):
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"""Persist the current LED state to EEPROM."""
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return self._call(Cmd.SAVE_LED)
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return self._call(Cmd.SAVE_LEDS)
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def eeprom_save_order(self):
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"""Persist the current order value to EEPROM."""
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@ -307,7 +331,7 @@ class ClusterCTRLv2Driver(object):
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def eeprom_save_usbboot(self):
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"""Persist USB booting settings to EEPROM."""
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return self._call(Cmd.SAVEUSBBOOT)
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return self._call(Cmd.SAVE_USBBOOT)
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####################################################################################################
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# USB hub management
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@ -320,11 +344,11 @@ class ClusterCTRLv2Driver(object):
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def hub_off(self):
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"""Turn off the USB hub."""
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return self._call(Cmd.HUB_ON)
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return self._call(Cmd.HUB_OFF)
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# FIXME: Is hub_status unsupported in the firmware?
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def reset_hub(self, delay: int = 0):
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def hub_reset(self, delay: int = 0):
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"""[Power] cycle the Controller hub for `delay` x 10ms."""
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return self._call(Cmd.HUB_CYCLE, delay)
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@ -332,19 +356,19 @@ class ClusterCTRLv2Driver(object):
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####################################################################################################
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# Power management
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####################################################################################################
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def power_on(self, id: PiID):
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def power_on(self, id: Union[PiRef, int]):
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"""Power on a given slot by ID."""
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id = self._id(id)
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return self._call(Cmd.ON, id)
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def power_off(self, id: PiID):
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def power_off(self, id: Union[PiRef, int]):
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"""Power off a given slot by ID."""
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id = self._id(id)
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return self._call(Cmd.OFF, id)
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def power_status(self, id: PiID):
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def power_status(self, id: Union[PiRef, int]):
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"""Read the status of a given slot by ID."""
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id = self._id(id)
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@ -353,14 +377,13 @@ class ClusterCTRLv2Driver(object):
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def power_all_on(self):
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"""Power on all slots in this Controller."""
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for id in self.pi_ids:
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if not self.power_status(id):
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for id in self.pis():
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self.power_on(id)
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def power_all_off(self):
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"""Power off all slots in this Controller."""
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for id in self.pi_ids:
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for id in self.pis():
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self.power_off(id)
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####################################################################################################
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@ -412,19 +435,19 @@ class ClusterCTRLv2Driver(object):
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####################################################################################################
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# USB booting
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####################################################################################################
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def usbboot_on(self, id: PiID):
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def usbboot_on(self, id: Union[PiRef, int]):
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"""Enable USB booting for the given Pi."""
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id = self._id(id)
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return self._call(Cmd.USBBOOT_EN, id)
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def usbboot_off(self, id: PiID):
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def usbboot_off(self, id: Union[PiRef, int]):
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"""Disable USB booting for the given Pi."""
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id = self._id(id)
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return self._call(Cmd.USBBOOT_DIS, id)
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def usbboot_status(self, id: PiID):
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def usbboot_status(self, id: Union[PiRef, int]):
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"""Get the current USB booting status for the given Pi."""
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id = self._id(id)
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@ -442,9 +465,8 @@ class ClusterCTRLv2Driver(object):
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def adc_ids(self):
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return range(1, self.max_adc + 1)
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def read_adc(self, id: PiID):
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id = self._id(id)
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self._call(Cmd.GET_DATA, Data.ADC_READ.value, id)
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def read_adc(self, adc_id: int):
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self._call(Cmd.GET_DATA, Data.ADC_READ.value, adc_id)
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# Now this is screwy.
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# DATA0 gets set to 0 or 1, indicating the voldage type
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# DATA1 and DATA2 are a 16bi number that need to be reassembled.
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@ -474,14 +496,16 @@ class ClusterCTRLv2Driver(object):
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####################################################################################################
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# Operations with inconsistent platform support
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####################################################################################################
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def led_on(self, id: PiID):
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def led_on(self, id: Union[PiRef, int]):
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"""Turn on an LED by ID."""
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id = self._id(id)
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return self._call(Cmd.LED_EN, id)
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def led_off(self, id: PiID):
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def led_off(self, id: Union[PiRef, int]):
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"""Turn off an LED by ID."""
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id = self._id(id)
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return self._call(Cmd.LED_DIS, id)
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# FIXME: LED status?
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265
projects/clusterctrl/test/python/test_driver.py
Normal file
265
projects/clusterctrl/test/python/test_driver.py
Normal file
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@ -0,0 +1,265 @@
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"""Tests covering the v2 ClusterCTRL driver."""
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from clusterctrl.driver import (
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BoardType,
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ClusterCTRLv2Driver,
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Cmd,
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Data,
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Reg,
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)
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import pytest
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class MockSMBus(object):
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"""An object that looks like smbus[2].SMBus.
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This object builds an append/mock log of all i2c calls performed, allowing a
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user to assert that a specific sequence of reads and writes was issued.
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"""
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def __init__(self, regs={}):
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self._log = []
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self._regs = regs
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self._retvals = []
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def read_byte_data(self, bus_addr, memory_addr) -> int:
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self._log.append(["read", bus_addr, memory_addr])
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return self._regs[memory_addr]
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def write_byte_data(self, bus_addr, memory_addr, value) -> None:
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self._regs[memory_addr] = value
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self._log.append(["write", bus_addr, memory_addr, value])
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# Minimum viable call/return mocking
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if memory_addr == Reg.CMD.value:
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# Clear data registers after a "call"
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for r in range(Reg.DATA7.value, Reg.CMD.value):
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self._regs[r] = 0
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if self._retvals:
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self._regs[Reg.DATA0.value] = self._retvals.pop()
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def read_block_data(self, bus_addr, memory_addr, block_size) -> int:
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raise NotImplemented
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@pytest.fixture
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def bus():
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"""An SMBus-alike object."""
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regs = {x: 0 for x in range(0, 16)}
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regs[Reg.ORDER.value] = 13 # (un)lucky 13
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regs[Reg.VERSION.value] = 2
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regs[Reg.MAXPI.value] = 5
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return MockSMBus(regs)
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@pytest.fixture
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def driver(bus):
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"""The driver under test atop a mocked bus."""
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driver = ClusterCTRLv2Driver(bus)
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bus._log.clear() # The driver has startup behavior, so flush the log
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return driver
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def sublist(l1, l2):
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"""Naive but adequate sublist testing."""
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for i in range(len(l1)):
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if l1[i] == l2[0]:
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for j in range(len(l2)):
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try:
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if l1[i + j] != l2[j]:
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break
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except IndexError:
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break
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else:
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return True
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return False
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def assert_log(bus, log):
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def simplify(e):
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if hasattr(e, "value"):
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return e.value
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else:
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return e
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log = [[simplify(e) for e in cmd] for cmd in log]
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assert sublist(bus._log, log), "\n".join(
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["Failed to find expected sublog", "log:"] + [f"- {e}" for e in bus._log] + ["expected:"] + [f"- {e}" for e in log]
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)
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def test_get_order(bus, driver):
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"""Check that get_order sends the appropriate command sequence."""
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assert driver.get_order() == 13
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assert_log(bus,
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[["read", 0x20, Reg.ORDER]])
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def test_set_order(bus, driver):
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"""Check that set_order sends the appropriate command sequence."""
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driver.set_order(14)
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assert_log(bus,
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[["write", 0x20, Reg.DATA0, 14],
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["write", 0x20, Reg.CMD, Cmd.SET_ORDER]])
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def test_type(bus, driver):
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assert isinstance(driver.type, BoardType)
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assert_log(bus,
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[["read", 0x20, Reg.TYPE]])
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def test_version(bus, driver):
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assert driver.fw_version
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# Invoke "read version"
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assert_log(bus,
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[["write", 0x20, Reg.DATA0, Data.VERSION],
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["write", 0x20, Reg.CMD, Cmd.GET_DATA]])
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# Read the two relevant registers
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assert_log(bus,
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[["read", 0x20, Reg.DATA1],
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["read", 0x20, Reg.DATA0]])
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def test_reset(bus, driver):
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driver.reset_all()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.RESET]])
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def test_eeprom_save_all(bus, driver):
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driver.eeprom_save_all()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE]])
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def test_eeprom_reset(bus, driver):
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driver.eeprom_reset()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE_DEFAULTS]])
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def test_eeprom_save_powerstate(bus, driver):
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driver.eeprom_save_powerstate()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE_POS]])
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def test_eeprom_save_leds(bus, driver):
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driver.eeprom_save_leds()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE_LEDS]])
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def test_eeprom_save_order(bus, driver):
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driver.eeprom_save_order()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE_ORDER]])
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def test_eeprom_save_ussbboot(bus, driver):
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driver.eeprom_save_usbboot()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.SAVE_USBBOOT]])
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def test_hub_on(bus, driver):
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driver.hub_on()
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assert_log(bus,
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[["write", 0x20, Reg.CMD, Cmd.HUB_ON]])
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def test_hub_off(bus, driver):
|
||||
driver.hub_off()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.CMD, Cmd.HUB_OFF]])
|
||||
|
||||
|
||||
def test_hub_reset(bus, driver):
|
||||
driver.hub_reset()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.CMD, Cmd.HUB_CYCLE]])
|
||||
|
||||
|
||||
def test_power_status(bus, driver):
|
||||
bus._retvals.append(1) # Set a mocked return code.
|
||||
assert driver.power_status(1) == 1
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, 1],
|
||||
["write", 0x20, Reg.CMD, Cmd.GET_PSTATUS]])
|
||||
|
||||
|
||||
def test_pis(bus, driver):
|
||||
assert len(list(driver.pis())) == 5
|
||||
|
||||
|
||||
def test_power_all_on(bus, driver):
|
||||
driver.power_all_on()
|
||||
|
||||
for pi in driver.pis():
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, pi.pi_id],
|
||||
["write", 0x20, Reg.CMD, Cmd.ON]])
|
||||
|
||||
|
||||
def test_power_all_off(bus, driver):
|
||||
driver.power_all_off()
|
||||
|
||||
for pi in driver.pis():
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, pi.pi_id],
|
||||
["write", 0x20, Reg.CMD, Cmd.OFF]])
|
||||
|
||||
|
||||
def test_alert_on(bus, driver):
|
||||
driver.alert_on()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.CMD, Cmd.ALERT_ON]])
|
||||
|
||||
|
||||
def test_alert_off(bus, driver):
|
||||
driver.alert_off()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.CMD, Cmd.ALERT_OFF]])
|
||||
|
||||
|
||||
def test_fan_on(bus, driver):
|
||||
driver.fan_on()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, 1],
|
||||
["write", 0x20, Reg.CMD, Cmd.FAN]])
|
||||
|
||||
|
||||
def test_fan_off(bus, driver):
|
||||
driver.fan_off()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, 0],
|
||||
["write", 0x20, Reg.CMD, Cmd.FAN]])
|
||||
|
||||
|
||||
def test_fan_status(bus, driver):
|
||||
driver.fan_status()
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, Data.FANSTATUS],
|
||||
["write", 0x20, Reg.CMD, Cmd.GET_DATA]])
|
||||
|
||||
|
||||
def test_get_order(bus, driver):
|
||||
driver.get_order()
|
||||
assert_log(bus,
|
||||
[["read", 0x20, Reg.ORDER]])
|
||||
|
||||
|
||||
def test_set_order(bus, driver):
|
||||
driver.set_order(253)
|
||||
assert_log(bus,
|
||||
[["write", 0x20, Reg.DATA0, 253],
|
||||
["write", 0x20, Reg.CMD, Cmd.SET_ORDER]])
|
||||
Loading…
Reference in a new issue