--- /dev/null
+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+G12A, G12B, and SM1 Common Definitions
+Ref:
+Linux kernel 4.9.y (hardkernel)
+ linux/include/dt-bindings/gpio/meson-g12a-gpio.h
+Linux kernel 5.4.y (mainline)
+ linux/include/dt-bindings/gpio/meson-g12a-gpio.h
+ linux/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+"""
+
+import re
+import gpiod
+from adafruit_blinka.microcontroller.generic_linux.libgpiod_pin import Pin
+
+chip0 = gpiod.Chip("0")
+chip1 = gpiod.Chip("1")
+
+if chip0.num_lines() < 20:
+ aobus = 0
+ periphs = 1
+ periphs_offset = chip1.num_lines() - 85
+else:
+ aobus = 1
+ periphs = 0
+ periphs_offset = chip0.num_lines() - 85
+
+chip0.close()
+chip1.close()
+
+GPIOAO_0 = GPIO496 = Pin((aobus, 0))
+GPIOAO_1 = GPIO497 = Pin((aobus, 1))
+GPIOAO_2 = GPIO498 = Pin((aobus, 2))
+GPIOAO_3 = GPIO499 = Pin((aobus, 3))
+GPIOAO_4 = GPIO500 = Pin((aobus, 4))
+GPIOAO_5 = GPIO501 = Pin((aobus, 5))
+GPIOAO_6 = GPIO502 = Pin((aobus, 6))
+GPIOAO_7 = GPIO503 = Pin((aobus, 7))
+GPIOAO_8 = GPIO504 = Pin((aobus, 8))
+GPIOAO_9 = GPIO505 = Pin((aobus, 9))
+GPIOAO_10 = GPIO506 = Pin((aobus, 10))
+GPIOAO_11 = GPIO507 = Pin((aobus, 11))
+
+GPIOE_0 = GPIO508 = Pin((aobus, 12))
+GPIOE_1 = GPIO509 = Pin((aobus, 13))
+GPIOE_2 = GPIO510 = Pin((aobus, 14))
+
+GPIOZ_0 = GPIO427 = Pin((periphs, 0 + periphs_offset))
+GPIOZ_1 = GPIO428 = Pin((periphs, 1 + periphs_offset))
+GPIOZ_2 = GPIO429 = Pin((periphs, 2 + periphs_offset))
+GPIOZ_3 = GPIO430 = Pin((periphs, 3 + periphs_offset))
+GPIOZ_4 = GPIO431 = Pin((periphs, 4 + periphs_offset))
+GPIOZ_5 = GPIO432 = Pin((periphs, 5 + periphs_offset))
+GPIOZ_6 = GPIO433 = Pin((periphs, 6 + periphs_offset))
+GPIOZ_7 = GPIO434 = Pin((periphs, 7 + periphs_offset))
+GPIOZ_8 = GPIO435 = Pin((periphs, 8 + periphs_offset))
+GPIOZ_9 = GPIO436 = Pin((periphs, 9 + periphs_offset))
+GPIOZ_10 = GPIO437 = Pin((periphs, 10 + periphs_offset))
+GPIOZ_11 = GPIO438 = Pin((periphs, 11 + periphs_offset))
+GPIOZ_12 = GPIO439 = Pin((periphs, 12 + periphs_offset))
+GPIOZ_13 = GPIO440 = Pin((periphs, 13 + periphs_offset))
+GPIOZ_14 = GPIO441 = Pin((periphs, 14 + periphs_offset))
+GPIOZ_15 = GPIO442 = Pin((periphs, 15 + periphs_offset))
+
+GPIOH_0 = GPIO443 = Pin((periphs, 16 + periphs_offset))
+GPIOH_1 = GPIO444 = Pin((periphs, 17 + periphs_offset))
+GPIOH_2 = GPIO445 = Pin((periphs, 18 + periphs_offset))
+GPIOH_3 = GPIO446 = Pin((periphs, 19 + periphs_offset))
+GPIOH_4 = GPIO447 = Pin((periphs, 20 + periphs_offset))
+GPIOH_5 = GPIO448 = Pin((periphs, 21 + periphs_offset))
+GPIOH_6 = GPIO449 = Pin((periphs, 22 + periphs_offset))
+GPIOH_7 = GPIO450 = Pin((periphs, 23 + periphs_offset))
+GPIOH_8 = GPIO451 = Pin((periphs, 24 + periphs_offset))
+
+BOOT_0 = GPIO452 = Pin((periphs, 25 + periphs_offset))
+BOOT_1 = GPIO453 = Pin((periphs, 26 + periphs_offset))
+BOOT_2 = GPIO454 = Pin((periphs, 27 + periphs_offset))
+BOOT_3 = GPIO455 = Pin((periphs, 28 + periphs_offset))
+BOOT_4 = GPIO456 = Pin((periphs, 29 + periphs_offset))
+BOOT_5 = GPIO457 = Pin((periphs, 30 + periphs_offset))
+BOOT_6 = GPIO458 = Pin((periphs, 31 + periphs_offset))
+BOOT_7 = GPIO459 = Pin((periphs, 32 + periphs_offset))
+BOOT_8 = GPIO460 = Pin((periphs, 33 + periphs_offset))
+BOOT_9 = GPIO461 = Pin((periphs, 34 + periphs_offset))
+BOOT_10 = GPIO462 = Pin((periphs, 35 + periphs_offset))
+BOOT_11 = GPIO463 = Pin((periphs, 36 + periphs_offset))
+BOOT_12 = GPIO464 = Pin((periphs, 37 + periphs_offset))
+BOOT_13 = GPIO465 = Pin((periphs, 38 + periphs_offset))
+BOOT_14 = GPIO466 = Pin((periphs, 39 + periphs_offset))
+BOOT_15 = GPIO467 = Pin((periphs, 40 + periphs_offset))
+
+GPIOC_0 = GPIO468 = Pin((periphs, 41 + periphs_offset))
+GPIOC_1 = GPIO469 = Pin((periphs, 42 + periphs_offset))
+GPIOC_2 = GPIO470 = Pin((periphs, 43 + periphs_offset))
+GPIOC_3 = GPIO471 = Pin((periphs, 44 + periphs_offset))
+GPIOC_4 = GPIO472 = Pin((periphs, 45 + periphs_offset))
+GPIOC_5 = GPIO473 = Pin((periphs, 46 + periphs_offset))
+GPIOC_6 = GPIO474 = Pin((periphs, 47 + periphs_offset))
+GPIOC_7 = GPIO475 = Pin((periphs, 48 + periphs_offset))
+
+GPIOA_0 = GPIO460 = Pin((periphs, 49 + periphs_offset))
+GPIOA_1 = GPIO461 = Pin((periphs, 50 + periphs_offset))
+GPIOA_2 = GPIO462 = Pin((periphs, 51 + periphs_offset))
+GPIOA_3 = GPIO463 = Pin((periphs, 52 + periphs_offset))
+GPIOA_4 = GPIO464 = Pin((periphs, 53 + periphs_offset))
+GPIOA_5 = GPIO465 = Pin((periphs, 54 + periphs_offset))
+GPIOA_6 = GPIO466 = Pin((periphs, 55 + periphs_offset))
+GPIOA_7 = GPIO467 = Pin((periphs, 56 + periphs_offset))
+GPIOA_8 = GPIO468 = Pin((periphs, 57 + periphs_offset))
+GPIOA_9 = GPIO469 = Pin((periphs, 58 + periphs_offset))
+GPIOA_10 = GPIO470 = Pin((periphs, 59 + periphs_offset))
+GPIOA_11 = GPIO471 = Pin((periphs, 60 + periphs_offset))
+GPIOA_12 = GPIO472 = Pin((periphs, 61 + periphs_offset))
+GPIOA_13 = GPIO473 = Pin((periphs, 62 + periphs_offset))
+GPIOA_14 = GPIO474 = Pin((periphs, 63 + periphs_offset))
+GPIOA_15 = GPIO475 = Pin((periphs, 64 + periphs_offset))
+
+GPIOX_0 = GPIO476 = Pin((periphs, 65 + periphs_offset))
+GPIOX_1 = GPIO477 = Pin((periphs, 66 + periphs_offset))
+GPIOX_2 = GPIO478 = Pin((periphs, 67 + periphs_offset))
+GPIOX_3 = GPIO479 = Pin((periphs, 68 + periphs_offset))
+GPIOX_4 = GPIO480 = Pin((periphs, 69 + periphs_offset))
+GPIOX_5 = GPIO481 = Pin((periphs, 70 + periphs_offset))
+GPIOX_6 = GPIO482 = Pin((periphs, 71 + periphs_offset))
+GPIOX_7 = GPIO483 = Pin((periphs, 72 + periphs_offset))
+GPIOX_8 = GPIO484 = Pin((periphs, 73 + periphs_offset))
+GPIOX_9 = GPIO485 = Pin((periphs, 74 + periphs_offset))
+GPIOX_10 = GPIO486 = Pin((periphs, 75 + periphs_offset))
+GPIOX_11 = GPIO487 = Pin((periphs, 76 + periphs_offset))
+GPIOX_12 = GPIO488 = Pin((periphs, 77 + periphs_offset))
+GPIOX_13 = GPIO489 = Pin((periphs, 78 + periphs_offset))
+GPIOX_14 = GPIO490 = Pin((periphs, 79 + periphs_offset))
+GPIOX_15 = GPIO491 = Pin((periphs, 80 + periphs_offset))
+GPIOX_16 = GPIO492 = Pin((periphs, 81 + periphs_offset))
+GPIOX_17 = GPIO493 = Pin((periphs, 82 + periphs_offset))
+GPIOX_18 = GPIO494 = Pin((periphs, 83 + periphs_offset))
+GPIOX_19 = GPIO495 = Pin((periphs, 84 + periphs_offset))
+
+SPI0_SCLK = GPIOA_1
+SPI0_MCLK0 = GPIOA_0
+SPI0_SDO = GPIOA_3
+SPI0_SDI = GPIOA_4
+
+# ordered as spiId, sckId, mosiId, misoId
+spiPorts = ((0, SPI0_SCLK, SPI0_MCLK0, SPI0_SDO, SPI0_SDI),)
+
+UART1_TX = GPIOH_7
+UART1_RX = GPIOH_6
+
+# ordered as uartId, txId, rxId
+uartPorts = ((1, UART1_TX, UART1_RX),)
+
+
+def get_dts_alias(device: str) -> str:
+ """Get the Device Tree Alias"""
+ uevent_path = "/sys/bus/platform/devices/" + device + "/uevent"
+ with open(uevent_path, "r", encoding="utf-8") as fd:
+ pattern = r"^OF_ALIAS_0=(.*)$"
+ uevent = fd.read().split("\n")
+ for line in uevent:
+ match = re.search(pattern, line)
+ if match:
+ return match.group(1).upper()
+
+ return None
+
+
+# ordered as i2cId, sclId, sdaId
+i2cPorts = []
+
+alias = get_dts_alias("ff805000.i2c")
+if alias is not None:
+ globals()[alias + "_SCL"] = GPIOX_18
+ globals()[alias + "_SDA"] = GPIOX_17
+ i2cPorts.append((int(alias[3]), GPIOX_18, GPIOX_17))
+
+i2cPorts = tuple(i2cPorts)
--- /dev/null
+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""Custom PulseIn Class to read PWM signals"""
+import time
+import subprocess
+import os
+import atexit
+import random
+import struct
+import sysv_ipc
+
+DEBUG = False
+queues = []
+procs = []
+
+# The message queues live outside of python space, and must be formally cleaned!
+def final():
+ """In case the program is cancelled or quit, we need to clean up the PulseIn
+ helper process and also the message queue, this is called at exit to do so"""
+ if DEBUG:
+ print("Cleaning up message queues", queues)
+ print("Cleaning up processes", procs)
+ for q in queues:
+ q.remove()
+ for proc in procs:
+ proc.terminate()
+
+
+atexit.register(final)
+
+# pylint: disable=c-extension-no-member
+class PulseIn:
+ """PulseIn Class to read PWM signals"""
+
+ def __init__(self, pin, maxlen=2, idle_state=False):
+ """Create a PulseIn object associated with the given pin.
+ The object acts as a read-only sequence of pulse lengths with
+ a given max length. When it is active, new pulse lengths are
+ added to the end of the list. When there is no more room
+ (len() == maxlen) the oldest pulse length is removed to make room."""
+ self._pin = pin
+ self._maxlen = maxlen
+ self._idle_state = idle_state
+ self._queue_key = random.randint(1, 9999)
+ try:
+ self._mq = sysv_ipc.MessageQueue(None, flags=sysv_ipc.IPC_CREX)
+ if DEBUG:
+ print("Message Queue Key: ", self._mq.key)
+ queues.append(self._mq)
+ except sysv_ipc.ExistentialError:
+ raise RuntimeError(
+ "Message queue creation failed"
+ ) from sysv_ipc.ExistentialError
+
+ # Check if OS is 64-bit
+ if struct.calcsize("P") * 8 == 64: # pylint: disable=no-member
+ libgpiod_filename = "libgpiod_pulsein64"
+ else:
+ libgpiod_filename = "libgpiod_pulsein"
+
+ dir_path = os.path.dirname(os.path.realpath(__file__))
+ cmd = [
+ dir_path + "/" + libgpiod_filename,
+ "--pulses",
+ str(maxlen),
+ "--queue",
+ str(self._mq.key),
+ ]
+ if idle_state:
+ cmd.append("-i")
+ cmd.append("gpiochip0")
+ cmd.append(str(pin))
+ if DEBUG:
+ print(cmd)
+
+ self._process = subprocess.Popen(cmd) # pylint: disable=consider-using-with
+ procs.append(self._process)
+
+ # wait for it to start up
+ if DEBUG:
+ print("Waiting for startup success message from subprocess")
+ message = self._wait_receive_msg(timeout=0.25)
+ if message[0] != b"!":
+ raise RuntimeError("Could not establish message queue with subprocess")
+ self._paused = False
+
+ # pylint: disable=redefined-builtin
+ def _wait_receive_msg(self, timeout=0, type=2):
+ """Internal helper that will wait for new messages of a given type,
+ and throw an exception on timeout"""
+ if timeout > 0:
+ stamp = time.monotonic()
+ while (time.monotonic() - stamp) < timeout:
+ try:
+ message = self._mq.receive(block=False, type=type)
+ return message
+ except sysv_ipc.BusyError:
+ time.sleep(0.001) # wait a bit then retry!
+ # uh-oh timed out
+ raise RuntimeError(
+ "Timed out waiting for PulseIn message. Make sure libgpiod is installed."
+ )
+ message = self._mq.receive(block=True, type=type)
+ return message
+
+ # pylint: enable=redefined-builtin
+
+ def deinit(self):
+ """Deinitialises the PulseIn and releases any hardware and software
+ resources for reuse."""
+ # Clean up after ourselves
+ self._process.terminate()
+ procs.remove(self._process)
+ self._mq.remove()
+ queues.remove(self._mq)
+
+ def __enter__(self):
+ """No-op used by Context Managers."""
+ return self
+
+ def __exit__(self, exc_type, exc_value, tb):
+ """Automatically deinitializes the hardware when exiting a context."""
+ self.deinit()
+
+ def resume(self, trigger_duration=0):
+ """Resumes pulse capture after an optional trigger pulse."""
+ if trigger_duration != 0:
+ self._mq.send("t%d" % trigger_duration, True, type=1)
+ else:
+ self._mq.send("r", True, type=1)
+ self._paused = False
+
+ def pause(self):
+ """Pause pulse capture"""
+ self._mq.send("p", True, type=1)
+ self._paused = True
+
+ @property
+ def paused(self):
+ """True when pulse capture is paused as a result of pause() or
+ an error during capture such as a signal that is too fast."""
+ return self._paused
+
+ @property
+ def maxlen(self):
+ """The maximum length of the PulseIn. When len() is equal to maxlen,
+ it is unclear which pulses are active and which are idle."""
+ return self._maxlen
+
+ def clear(self):
+ """Clears all captured pulses"""
+ self._mq.send("c", True, type=1)
+
+ def popleft(self):
+ """Removes and returns the oldest read pulse."""
+ self._mq.send("^", True, type=1)
+ message = self._wait_receive_msg()
+ reply = int(message[0].decode("utf-8"))
+ # print(reply)
+ if reply == -1:
+ raise IndexError("pop from empty list")
+ return reply
+
+ def __len__(self):
+ """Returns the current pulse length"""
+ self._mq.send("l", True, type=1)
+ message = self._wait_receive_msg()
+ return int(message[0].decode("utf-8"))
+
+ # pylint: disable=redefined-builtin
+ def __getitem__(self, index, type=None):
+ """Returns the value at the given index or values in slice."""
+ self._mq.send("i%d" % index, True, type=1)
+ message = self._wait_receive_msg()
+ ret = int(message[0].decode("utf-8"))
+ if ret == -1:
+ raise IndexError("list index out of range")
+ return ret
+
+ # pylint: enable=redefined-builtin
projects / Adafruit_Blinka-hackapet.git / commitdiff