Restructure and move pins to generic linux

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / bcm283x / pin.py

diff --git a/src/adafruit_blinka/microcontroller/bcm283x/pin.py b/src/adafruit_blinka/microcontroller/bcm283x/pin.py
index e31d401249d68f12fac8a63460b1046af3ba163a..d741ada1854b07db851e5e8bab8799a8de08edad 100644 (file)
--- a/src/adafruit_blinka/microcontroller/bcm283x/pin.py
+++ b/src/adafruit_blinka/microcontroller/bcm283x/pin.py
@@ -2,131 +2,9 @@
 #
 # SPDX-License-Identifier: MIT
 """Broadcom BCM283x pin names"""
-from pathlib import Path
-import lgpio
-
-
-def _get_gpiochip():
-    """
-    Determines the handle of the GPIO chip device to access.
-
-    iterate through sysfs  to find a GPIO chip device with a driver known to be
-    used for userspace GPIO access.
-    """
-    for dev in Path("/sys/bus/gpio/devices").glob("gpiochip*"):
-        drivers = set((dev / "of_node/compatible").read_text().split("\0"))
-        #   check if driver names are intended for userspace control
-        if drivers & {
-            "raspberrypi,rp1-gpio",
-            "raspberrypi,bcm2835-gpio",
-            "raspberrypi,bcm2711-gpio",
-        }:
-            return lgpio.gpiochip_open(int(dev.name[-1]))
-    # return chip0 as a fallback
-    return lgpio.gpiochip_open(0)
-
-
-CHIP = _get_gpiochip()
-
-
-class Pin:
-    """Pins dont exist in CPython so...lets make our own!"""
-
-    LOW = 0
-    HIGH = 1
-    OFF = LOW
-    ON = HIGH
-
-    # values of lg mode constants
-    PULL_NONE = 0x80
-    PULL_UP = 0x20
-    PULL_DOWN = 0x40
-    ACTIVE_LOW = 0x02
-
-    # drive mode lg constants
-    OPEN_DRAIN = 0x04
-    IN = 0x0100
-    OUT = 0x0200
-
-    # LG mode constants
-    _LG_ALERT = 0x400
-    _LG_GROUP = 0x800
-    _LG_MODES = IN | OUT | _LG_ALERT | _LG_GROUP
-    _LG_PULLS = PULL_NONE | PULL_UP | PULL_NONE | ACTIVE_LOW
-    _LG_DRIVES = OPEN_DRAIN
-
-    id = None
-    _value = LOW
-    _mode = IN
-
-    # we want exceptions
-    lgpio.exceptions = True
-
-    def __init__(self, bcm_number):
-        self.id = bcm_number
-
-    def __repr__(self):
-        return str(self.id)
-
-    def __eq__(self, other):
-        return self.id == other
-
-    def init(self, mode=IN, pull=None):
-        """Initialize the Pin"""
-        if mode is not None:
-            if mode == Pin.IN:
-                self._mode = Pin.IN
-                self._set_gpio_mode_in()
-            elif mode == self.OUT:
-                self._mode = Pin.OUT
-                Pin._check_result(lgpio.gpio_claim_output(CHIP, self.id, Pin.LOW))
-            else:
-                raise RuntimeError(f"Invalid mode for pin: {self.id}")
-        if pull is not None:
-            if self._mode != Pin.IN:
-                raise RuntimeError("Can only set pull resistor on input")
-            if pull in {Pin.PULL_UP, Pin.PULL_DOWN, Pin.PULL_NONE}:
-                self._set_gpio_mode_in(lflags=pull)
-            else:
-                raise RuntimeError(f"Invalid pull for pin: {self.id}")
-
-    def value(self, val=None):
-        """Set or return the Pin Value"""
-        if val is not None:
-            if val == Pin.LOW:
-                self._value = val
-                Pin._check_result(lgpio.gpio_write(CHIP, self.id, val))
-            elif val == Pin.HIGH:
-                self._value = val
-                Pin._check_result(lgpio.gpio_write(CHIP, self.id, val))
-            else:
-                raise RuntimeError("Invalid value for pin")
-            return None
-        return Pin._check_result(lgpio.gpio_read(CHIP, self.id))
-
-    @staticmethod
-    def _check_result(result):
-        """
-        convert any result other than zero to a text message and pass it back
-        as a runtime exception.  Typical usage:  use the lgpio call as the
-        argument.
-        """
-        if result < 0:
-            raise RuntimeError(lgpio.error_text(result))
-        return result
-
-    def _set_gpio_mode_in(self, lflags=0):
-        """
-        claim a gpio as input, or modify the flags (PULL_UP, PULL_DOWN, ... )
-        """
-        # This gpio_free may seem redundant, but is required when
-        #  changing the line-flags of an already acquired input line
-        try:
-            lgpio.gpio_free(CHIP, self.id)
-        except lgpio.error:
-            pass
-        Pin._check_result(lgpio.gpio_claim_input(CHIP, self.id, lFlags=lflags))
 
+# Use RPi.GPIO pins for Raspberry Pi 1-3B+
+from adafruit_blinka.microcontroller.generic_linux.rpi_gpio_pin import Pin
 
 D0 = Pin(0)
 D1 = Pin(1)