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This commit is contained in:
gamblor21 2020-10-31 13:37:05 -05:00
parent 78477a374a
commit 5ea09fe348
2 changed files with 46 additions and 36 deletions
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80
shared-bindings/busdevice/I2CDevice.c
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@ -39,27 +39,30 @@
//| class I2CDevice: //| class I2CDevice:
//| """ //| """I2C Device Manager"""
//| Represents a single I2C device and manages locking the bus and the device //|
//| address. //| def __init__(self, scl: microcontroller.Pin, sda: microcontroller.Pin, *, frequency: int = 100000, timeout: int = 255) -> None:
//| :param ~busio.I2C i2c: The I2C bus the device is on //|
//| :param int device_address: The 7 bit device address //| """Represents a single I2C device and manages locking the bus and the device
//| :param bool probe: Probe for the device upon object creation, default is true //| address.
//| .. note:: This class is **NOT** built into CircuitPython. See //| :param ~busio.I2C i2c: The I2C bus the device is on
//| :ref:`here for install instructions <bus_device_installation>`. //| :param int device_address: The 7 bit device address
//| Example: //| :param bool probe: Probe for the device upon object creation, default is true
//| .. code-block:: python //| .. note:: This class is **NOT** built into CircuitPython. See
//| import busio //| :ref:`here for install instructions <bus_device_installation>`.
//| from board import * //| Example:
//| from adafruit_bus_device.i2c_device import I2CDevice //| .. code-block:: python
//| with busio.I2C(SCL, SDA) as i2c: //| import busio
//| device = I2CDevice(i2c, 0x70) //| from board import *
//| bytes_read = bytearray(4) //| from adafruit_bus_device.i2c_device import I2CDevice
//| with device: //| with busio.I2C(SCL, SDA) as i2c:
//| device.readinto(bytes_read) //| device = I2CDevice(i2c, 0x70)
//| # A second transaction //| bytes_read = bytearray(4)
//| with device: //| with device:
//| device.write(bytes_read)""" //| device.readinto(bytes_read)
//| # A second transaction
//| with device:
//| device.write(bytes_read)"""
//| ... //| ...
//| //|
STATIC mp_obj_t busdevice_i2cdevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { STATIC mp_obj_t busdevice_i2cdevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
@ -84,6 +87,10 @@ STATIC mp_obj_t busdevice_i2cdevice_make_new(const mp_obj_type_t *type, size_t n
return (mp_obj_t)self; return (mp_obj_t)self;
} }
//| def __enter__(self) -> I2C:
//| """Context manager entry to lock bus."""
//| ...
//|
STATIC mp_obj_t busdevice_i2cdevice_obj___enter__(mp_obj_t self_in) { STATIC mp_obj_t busdevice_i2cdevice_obj___enter__(mp_obj_t self_in) {
busdevice_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(self_in); busdevice_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_busdevice_i2cdevice_lock(self); common_hal_busdevice_i2cdevice_lock(self);
@ -91,13 +98,17 @@ STATIC mp_obj_t busdevice_i2cdevice_obj___enter__(mp_obj_t self_in) {
} }
STATIC MP_DEFINE_CONST_FUN_OBJ_1(busdevice_i2cdevice___enter___obj, busdevice_i2cdevice_obj___enter__); STATIC MP_DEFINE_CONST_FUN_OBJ_1(busdevice_i2cdevice___enter___obj, busdevice_i2cdevice_obj___enter__);
//| def __exit__(self) -> None:
//| """Automatically unlocks the bus on exit."""
//| ...
//|
STATIC mp_obj_t busdevice_i2cdevice_obj___exit__(size_t n_args, const mp_obj_t *args) { STATIC mp_obj_t busdevice_i2cdevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
common_hal_busdevice_i2cdevice_unlock(MP_OBJ_TO_PTR(args[0])); common_hal_busdevice_i2cdevice_unlock(MP_OBJ_TO_PTR(args[0]));
return mp_const_none; return mp_const_none;
} }
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busdevice_i2cdevice___exit___obj, 4, 4, busdevice_i2cdevice_obj___exit__); STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busdevice_i2cdevice___exit___obj, 4, 4, busdevice_i2cdevice_obj___exit__);
//| def readinto(self, buf, *, start=0, end=None): //| def readinto(self, buf, *, start=0, end=None) -> None:
//| """ //| """
//| Read into ``buf`` from the device. The number of bytes read will be the //| Read into ``buf`` from the device. The number of bytes read will be the
//| length of ``buf``. //| length of ``buf``.
@ -143,18 +154,17 @@ STATIC mp_obj_t busdevice_i2cdevice_readinto(size_t n_args, const mp_obj_t *pos_
} }
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(busdevice_i2cdevice_readinto_obj, 2, busdevice_i2cdevice_readinto); STATIC MP_DEFINE_CONST_FUN_OBJ_KW(busdevice_i2cdevice_readinto_obj, 2, busdevice_i2cdevice_readinto);
//| def write(self, buf, *, start=0, end=None): //| def write(self, buf, *, start=0, end=None) -> None:
//| """ //| """
//| Write the bytes from ``buffer`` to the device, then transmit a stop //| Write the bytes from ``buffer`` to the device, then transmit a stop bit.
//| bit. //| If ``start`` or ``end`` is provided, then the buffer will be sliced
//| If ``start`` or ``end`` is provided, then the buffer will be sliced //| as if ``buffer[start:end]``. This will not cause an allocation like
//| as if ``buffer[start:end]``. This will not cause an allocation like //| ``buffer[start:end]`` will so it saves memory.
//| ``buffer[start:end]`` will so it saves memory. //| :param bytearray buffer: buffer containing the bytes to write
//| :param bytearray buffer: buffer containing the bytes to write //| :param int start: Index to start writing from
//| :param int start: Index to start writing from //| :param int end: Index to read up to but not include; if None, use ``len(buf)``
//| :param int end: Index to read up to but not include; if None, use ``len(buf)`` //| """
//| """ //| ...
//| ...
//| //|
STATIC void write(busdevice_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end) { STATIC void write(busdevice_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end) {
mp_buffer_info_t bufinfo; mp_buffer_info_t bufinfo;
@ -190,7 +200,7 @@ STATIC mp_obj_t busdevice_i2cdevice_write(size_t n_args, const mp_obj_t *pos_arg
MP_DEFINE_CONST_FUN_OBJ_KW(busdevice_i2cdevice_write_obj, 2, busdevice_i2cdevice_write); MP_DEFINE_CONST_FUN_OBJ_KW(busdevice_i2cdevice_write_obj, 2, busdevice_i2cdevice_write);
//| def write_then_readinto(self, out_buffer, in_buffer, *, out_start=0, out_end=None, in_start=0, in_end=None): //| def write_then_readinto(self, out_buffer, in_buffer, *, out_start=0, out_end=None, in_start=0, in_end=None) -> None:
//| """ //| """
//| Write the bytes from ``out_buffer`` to the device, then immediately //| Write the bytes from ``out_buffer`` to the device, then immediately
//| reads into ``in_buffer`` from the device. The number of bytes read //| reads into ``in_buffer`` from the device. The number of bytes read

2
shared-bindings/busdevice/__init__.c
View File

@ -40,7 +40,7 @@
//| The I2CDevice and SPIDevice helper classes make managing transaction state on a bus easy. //| The I2CDevice and SPIDevice helper classes make managing transaction state on a bus easy.
//| For example, they manage locking the bus to prevent other concurrent access. For SPI //| For example, they manage locking the bus to prevent other concurrent access. For SPI
//| devices, it manages the chip select and protocol changes such as mode. For I2C, it //| devices, it manages the chip select and protocol changes such as mode. For I2C, it
//| manages the device address. //| manages the device address."""
//| //|
STATIC const mp_rom_map_elem_t busdevice_module_globals_table[] = { STATIC const mp_rom_map_elem_t busdevice_module_globals_table[] = {