153 lines
7.1 KiB
C
153 lines
7.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Mark Komus
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/adafruit_bus_device/spi_device/SPIDevice.h"
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#include "shared-bindings/util.h"
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#include "shared-module/adafruit_bus_device/spi_device/SPIDevice.h"
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#include "common-hal/digitalio/DigitalInOut.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "shared/runtime/buffer_helper.h"
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#include "shared/runtime/context_manager_helpers.h"
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#include "py/runtime.h"
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#include "supervisor/shared/translate/translate.h"
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//| class SPIDevice:
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//| """SPI Device Manager"""
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//|
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//| def __init__(
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//| self,
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//| spi: busio.SPI,
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//| chip_select: Optional[digitalio.DigitalInOut] = None,
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//| *,
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//| baudrate: int = 100000,
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//| polarity: int = 0,
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//| phase: int = 0,
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//| extra_clocks: int = 0
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//| ) -> None:
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//| """
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//| Represents a single SPI device and manages locking the bus and the device address.
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//|
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//| :param ~busio.SPI spi: The SPI bus the device is on
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//| :param ~digitalio.DigitalInOut chip_select: The chip select pin object that implements the DigitalInOut API. ``None`` if a chip select pin is not being used.
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//| :param bool cs_active_value: Set to true if your device requires CS to be active high. Defaults to false.
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//| :param int extra_clocks: The minimum number of clock cycles to cycle the bus after CS is high. (Used for SD cards.)
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//|
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//| Example::
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//|
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//| import busio
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//| import digitalio
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//| from board import *
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//| from adafruit_bus_device.spi_device import SPIDevice
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//| with busio.SPI(SCK, MOSI, MISO) as spi_bus:
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//| cs = digitalio.DigitalInOut(D10)
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//| device = SPIDevice(spi_bus, cs)
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//| bytes_read = bytearray(4)
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//| # The object assigned to spi in the with statements below
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//| # is the original spi_bus object. We are using the busio.SPI
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//| # operations busio.SPI.readinto() and busio.SPI.write().
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//| with device as spi:
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//| spi.readinto(bytes_read)
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//| # A second transaction
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//| with device as spi:
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//| spi.write(bytes_read)"""
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//| ...
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STATIC mp_obj_t adafruit_bus_device_spidevice_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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adafruit_bus_device_spidevice_obj_t *self = m_new_obj(adafruit_bus_device_spidevice_obj_t);
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self->base.type = &adafruit_bus_device_spidevice_type;
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enum { ARG_spi, ARG_chip_select, ARG_cs_active_value, ARG_baudrate, ARG_polarity, ARG_phase, ARG_extra_clocks };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_spi, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_chip_select, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_cs_active_value, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
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{ MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
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{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_extra_clocks, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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busio_spi_obj_t *spi = args[ARG_spi].u_obj;
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mp_arg_validate_type_or_none(args[ARG_chip_select].u_obj, &digitalio_digitalinout_type, MP_QSTR_chip_select);
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common_hal_adafruit_bus_device_spidevice_construct(MP_OBJ_TO_PTR(self), spi, args[ARG_chip_select].u_obj, args[ARG_cs_active_value].u_bool, args[ARG_baudrate].u_int, args[ARG_polarity].u_int,
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args[ARG_phase].u_int, args[ARG_extra_clocks].u_int);
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if (args[ARG_chip_select].u_obj != mp_const_none) {
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digitalinout_result_t result = common_hal_digitalio_digitalinout_switch_to_output(MP_OBJ_TO_PTR(args[ARG_chip_select].u_obj),
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true, DRIVE_MODE_PUSH_PULL);
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#if CIRCUITPY_DIGITALIO_HAVE_INPUT_ONLY
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if (result == DIGITALINOUT_INPUT_ONLY) {
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mp_raise_NotImplementedError(translate("Pin is input only"));
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}
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#else
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(void)result;
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#endif
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}
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return (mp_obj_t)self;
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}
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//| def __enter__(self) -> busio.SPI:
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//| """Starts a SPI transaction by configuring the SPI and asserting chip select."""
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//| ...
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STATIC mp_obj_t adafruit_bus_device_spidevice_obj___enter__(mp_obj_t self_in) {
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adafruit_bus_device_spidevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
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return common_hal_adafruit_bus_device_spidevice_enter(self);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_spidevice___enter___obj, adafruit_bus_device_spidevice_obj___enter__);
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//| def __exit__(self) -> None:
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//| """Ends a SPI transaction by deasserting chip select. See
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//| :ref:`lifetime-and-contextmanagers` for more info."""
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//| ...
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//|
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STATIC mp_obj_t adafruit_bus_device_spidevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
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common_hal_adafruit_bus_device_spidevice_exit(MP_OBJ_TO_PTR(args[0]));
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_spidevice___exit___obj, 4, 4, adafruit_bus_device_spidevice_obj___exit__);
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STATIC const mp_rom_map_elem_t adafruit_bus_device_spidevice_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_spidevice___enter___obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_spidevice___exit___obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spidevice_locals_dict, adafruit_bus_device_spidevice_locals_dict_table);
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const mp_obj_type_t adafruit_bus_device_spidevice_type = {
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{ &mp_type_type },
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.name = MP_QSTR_SPIDevice,
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.make_new = adafruit_bus_device_spidevice_make_new,
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.locals_dict = (mp_obj_dict_t *)&adafruit_bus_device_spidevice_locals_dict,
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};
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