1 files changed, 140 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/adafruit_bus_device/spi_device/SPIDevice.c b/circuitpython/shared-bindings/adafruit_bus_device/spi_device/SPIDevice.c
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+++ b/circuitpython/shared-bindings/adafruit_bus_device/spi_device/SPIDevice.c
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/adafruit_bus_device/spi_device/SPIDevice.h"
+#include "shared-bindings/util.h"
+#include "shared-module/adafruit_bus_device/spi_device/SPIDevice.h"
+#include "common-hal/digitalio/DigitalInOut.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+
+#include "shared/runtime/buffer_helper.h"
+#include "shared/runtime/context_manager_helpers.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class SPIDevice:
+//|     """SPI Device Manager"""
+//|
+//|     def __init__(self, spi: busio.SPI, chip_select: microcontroller.Pin, *, baudrate: int = 100000, polarity: int = 0, phase: int = 0, extra_clocks : int = 0) -> None:
+//|
+//|         """
+//|         Represents a single SPI device and manages locking the bus and the device address.
+//|
+//|         :param ~busio.SPI spi: The SPI bus the device is on
+//|         :param ~digitalio.DigitalInOut chip_select: The chip select pin object that implements the DigitalInOut API.
+//|         :param bool cs_active_value: Set to true if your device requires CS to be active high. Defaults to false.
+//|         :param int extra_clocks: The minimum number of clock cycles to cycle the bus after CS is high. (Used for SD cards.)
+//|
+//|         Example::
+//|
+//|             import busio
+//|             import digitalio
+//|             from board import *
+//|             from adafruit_bus_device.spi_device import SPIDevice
+//|             with busio.SPI(SCK, MOSI, MISO) as spi_bus:
+//|                 cs = digitalio.DigitalInOut(D10)
+//|                 device = SPIDevice(spi_bus, cs)
+//|                 bytes_read = bytearray(4)
+//|                 # The object assigned to spi in the with statements below
+//|                 # is the original spi_bus object. We are using the busio.SPI
+//|                 # operations busio.SPI.readinto() and busio.SPI.write().
+//|                 with device as spi:
+//|                     spi.readinto(bytes_read)
+//|                 # A second transaction
+//|                 with device as spi:
+//|                     spi.write(bytes_read)"""
+//|     ...
+//|
+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) {
+    adafruit_bus_device_spidevice_obj_t *self = m_new_obj(adafruit_bus_device_spidevice_obj_t);
+    self->base.type = &adafruit_bus_device_spidevice_type;
+    enum { ARG_spi, ARG_chip_select, ARG_cs_active_value, ARG_baudrate, ARG_polarity, ARG_phase, ARG_extra_clocks };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_spi, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_chip_select, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_cs_active_value, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+        { MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
+        { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_extra_clocks, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    busio_spi_obj_t *spi = args[ARG_spi].u_obj;
+
+    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,
+        args[ARG_phase].u_int, args[ARG_extra_clocks].u_int);
+
+    if (args[ARG_chip_select].u_obj != MP_OBJ_NULL) {
+        digitalinout_result_t result = common_hal_digitalio_digitalinout_switch_to_output(MP_OBJ_TO_PTR(args[ARG_chip_select].u_obj),
+            true, DRIVE_MODE_PUSH_PULL);
+        if (result == DIGITALINOUT_INPUT_ONLY) {
+            mp_raise_NotImplementedError(translate("Pin is input only"));
+        }
+    }
+
+    return (mp_obj_t)self;
+}
+
+//|     def __enter__(self) -> busio.SPI:
+//|         """Starts a SPI transaction by configuring the SPI and asserting chip select."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___enter__(mp_obj_t self_in) {
+    adafruit_bus_device_spidevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return common_hal_adafruit_bus_device_spidevice_enter(self);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_spidevice___enter___obj, adafruit_bus_device_spidevice_obj___enter__);
+
+
+//|     def __exit__(self) -> None:
+//|         """Ends a SPI transaction by deasserting chip select. See
+//|         :ref:`lifetime-and-contextmanagers` for more info."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    common_hal_adafruit_bus_device_spidevice_exit(MP_OBJ_TO_PTR(args[0]));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_spidevice___exit___obj, 4, 4, adafruit_bus_device_spidevice_obj___exit__);
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_spidevice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_spidevice___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_spidevice___exit___obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spidevice_locals_dict, adafruit_bus_device_spidevice_locals_dict_table);
+
+const mp_obj_type_t adafruit_bus_device_spidevice_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_SPIDevice,
+    .make_new = adafruit_bus_device_spidevice_make_new,
+    .locals_dict = (mp_obj_dict_t *)&adafruit_bus_device_spidevice_locals_dict,
+};