/*

* This file is part of the MicroPython project, http://micropython.org/

*

* The MIT License (MIT)

*

* Copyright (c) 2016 Scott Shawcroft

*

* 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.

*/

// This file contains all of the Python API definitions for the machine module.

// Machine is the HAL for low-level, hardware accelerated functions. It is not

// meant to simplify APIs, its only meant to unify them so that other modules

// do not require port specific logic.

#include "machine.h"

#include "py/runtime.h"

//| :mod:`machine` --- functions related to the board

//| =================================================

//|

//| .. module:: machine

//| :synopsis: functions related to the board

//| :platform: SAMD21

//|

//| The ``machine`` module contains specific functions related to the board.

//|

//| This is soon to be renamed to distinguish it from upstream's `machine`!

//|

//| :class:`I2C` --- Two wire serial protocol

//| ------------------------------------------

//|

//| .. class:: I2C(scl, sda, \*, freq=400000)

//|

//| I2C is a two-wire protocol for communicating between devices. At the

//| physical level it consists of 2 wires: SCL and SDA, the clock and data lines

//| respectively.

//|

//| I2C objects are created attached to a specific bus. They can be initialised

//| when created, or initialised later on.

//|

//| :param str scl: The clock pin

//| :param str sda: The data pin

//| :param int freq: The clock frequency

//|

STATIC mp_obj_t machine_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *pos_args) {

mp_arg_check_num(n_args, n_kw, 0, MP_OBJ_FUN_ARGS_MAX, true);

machine_i2c_obj_t *self = m_new_obj(machine_i2c_obj_t);

self->base.type = &machine_i2c_type;

mp_map_t kw_args;

mp_map_init_fixed_table(&kw_args, n_kw, pos_args + n_args);

enum { ARG_scl, ARG_sda, ARG_freq };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_scl, MP_ARG_REQUIRED | MP_ARG_OBJ },

{ MP_QSTR_sda, MP_ARG_REQUIRED | MP_ARG_OBJ },

{ MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 400000} },

};

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

mp_arg_parse_all(n_args, pos_args, &kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

// TODO(tannewt): Replace pin_find with a unified version.

const pin_obj_t* scl = pin_find(args[ARG_scl].u_obj);

const pin_obj_t* sda = pin_find(args[ARG_sda].u_obj);

mp_hal_i2c_construct(self, scl, sda, args[ARG_freq].u_int);

return (mp_obj_t)self;

}

//| .. method:: I2C.init()

//|

//| Initializes control of the underlying hardware so other classes cannot

//| use it.

//|

STATIC mp_obj_t machine_i2c_obj_init(mp_obj_t self_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_i2c_init(self);

return self_in;

}

MP_DEFINE_CONST_FUN_OBJ_1(machine_i2c_init_obj, machine_i2c_obj_init);

//| .. method:: I2C.deinit()

//|

//| Releases control of the underlying hardware so other classes can use it.

//|

STATIC mp_obj_t machine_i2c_obj_deinit(mp_obj_t self_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_i2c_deinit(self);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_1(machine_i2c_deinit_obj, machine_i2c_obj_deinit);

STATIC mp_obj_t machine_i2c_obj___exit__(size_t n_args, const mp_obj_t *args) {

(void)n_args;

mp_hal_i2c_deinit(args[0]);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_i2c_obj___exit___obj, 4, 4, machine_i2c_obj___exit__);

//| .. method:: I2C.scan()

//|

//| Scan all I2C addresses between 0x08 and 0x77 inclusive and return a list of

//| those that respond. A device responds if it pulls the SDA line low after

//| its address (including a read bit) is sent on the bus.

//|

STATIC mp_obj_t machine_i2c_scan(mp_obj_t self_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_obj_t list = mp_obj_new_list(0, NULL);

// 7-bit addresses 0b0000xxx and 0b1111xxx are reserved

for (int addr = 0x08; addr < 0x78; ++addr) {

bool success = mp_hal_i2c_probe(self, addr);

if (success) {

mp_obj_list_append(list, MP_OBJ_NEW_SMALL_INT(addr));

}

}

return list;

}

MP_DEFINE_CONST_FUN_OBJ_1(machine_i2c_scan_obj, machine_i2c_scan);

//| .. method:: I2C.readfrom(addr, nbytes)

//|

//| Read `nbytes` from the slave specified by `addr`.

//|

//| :param int addr: The 7 bit address of the device

//| :param int nbytes: The number of bytes to read

//| :return: the data read

//| :rtype: bytes

//|

STATIC mp_obj_t machine_i2c_readfrom(mp_obj_t self_in, mp_obj_t addr_in, mp_obj_t nbytes_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

vstr_t vstr;

vstr_init_len(&vstr, mp_obj_get_int(nbytes_in));

mp_hal_i2c_read(self, mp_obj_get_int(addr_in), (uint8_t*)vstr.buf, vstr.len);

return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);

}

MP_DEFINE_CONST_FUN_OBJ_3(machine_i2c_readfrom_obj, machine_i2c_readfrom);

//| .. method:: I2C.readfrom_into(addr, buf)

//|

//| Read into `buf` from the slave specified by `addr`.

//| The number of bytes read will be the length of `buf`.

//|

STATIC mp_obj_t machine_i2c_readfrom_into(mp_obj_t self_in, mp_obj_t addr_in, mp_obj_t buf_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_WRITE);

mp_hal_i2c_read(self, mp_obj_get_int(addr_in), (uint8_t*)bufinfo.buf, bufinfo.len);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_3(machine_i2c_readfrom_into_obj, machine_i2c_readfrom_into);

//| .. method:: I2C.writeto(addr, buf)

//|

//| Write the bytes from `buf` to the slave specified by `addr`.

//|

STATIC mp_obj_t machine_i2c_writeto(mp_obj_t self_in, mp_obj_t addr_in, mp_obj_t buf_in) {

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);

mp_hal_i2c_write(self, mp_obj_get_int(addr_in), bufinfo.buf, bufinfo.len);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_i2c_writeto_obj, machine_i2c_writeto);

//| .. method:: I2C.readfrom_mem(addr, memaddr, nbytes, \*, addrsize=8)

//|

//| Read `nbytes` from the slave specified by `addr` starting from the memory

//| address specified by `memaddr`.

//| The argument `addrsize` specifies the address size in bits (on ESP8266

//| this argument is not recognised and the address size is always 8 bits).

//| Returns a `bytes` object with the data read.

//|

STATIC mp_obj_t machine_i2c_readfrom_mem(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {

enum { ARG_addr, ARG_memaddr, ARG_n, ARG_addrsize };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_memaddr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_n, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

//{ MP_QSTR_addrsize, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} }, TODO

};

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

// create the buffer to store data into

vstr_t vstr;

vstr_init_len(&vstr, args[ARG_n].u_int);

// do the transfer

mp_hal_i2c_read_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int, (uint8_t*)vstr.buf, vstr.len);

return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);

}

MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_readfrom_mem_obj, 1, machine_i2c_readfrom_mem);

//| .. method:: I2C.readfrom_mem_into(addr, memaddr, buf, \*, addrsize=8)

//|

//| Read into `buf` from the slave specified by `addr` starting from the

//| memory address specified by `memaddr`. The number of bytes read is the

//| length of `buf`.

//| The argument `addrsize` specifies the address size in bits (on ESP8266

//| this argument is not recognised and the address size is always 8 bits).

//|

STATIC mp_obj_t machine_i2c_readfrom_mem_into(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {

enum { ARG_addr, ARG_memaddr, ARG_buf, ARG_addrsize };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_memaddr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_buf, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },

//{ MP_QSTR_addrsize, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} }, TODO

};

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

// get the buffer to store data into

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(args[ARG_buf].u_obj, &bufinfo, MP_BUFFER_WRITE);

// do the transfer

mp_hal_i2c_read_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int, bufinfo.buf, bufinfo.len);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_readfrom_mem_into_obj, 1, machine_i2c_readfrom_mem_into);

//| .. method:: I2C.writeto_mem(addr, memaddr, buf, \*, addrsize=8)

//|

//| Write `buf` to the slave specified by `addr` starting from the

//| memory address specified by `memaddr`.

//| The argument `addrsize` specifies the address size in bits (on ESP8266

//| this argument is not recognised and the address size is always 8 bits).

//|

STATIC mp_obj_t machine_i2c_writeto_mem(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {

enum { ARG_addr, ARG_memaddr, ARG_buf, ARG_addrsize };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_memaddr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },

{ MP_QSTR_buf, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },

//{ MP_QSTR_addrsize, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} }, TODO

};

machine_i2c_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

// get the buffer to write the data from

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(args[ARG_buf].u_obj, &bufinfo, MP_BUFFER_READ);

// do the transfer

mp_hal_i2c_write_mem(self, args[ARG_addr].u_int, args[ARG_memaddr].u_int, bufinfo.buf, bufinfo.len);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2c_writeto_mem_obj, 1, machine_i2c_writeto_mem);

STATIC const mp_rom_map_elem_t machine_i2c_locals_dict_table[] = {

{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_i2c_init_obj) },

{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_i2c_deinit_obj) },

{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&machine_i2c_init_obj) },

{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&machine_i2c_obj___exit___obj) },

{ MP_ROM_QSTR(MP_QSTR_scan), MP_ROM_PTR(&machine_i2c_scan_obj) },

// standard bus operations

{ MP_ROM_QSTR(MP_QSTR_readfrom), MP_ROM_PTR(&machine_i2c_readfrom_obj) },

{ MP_ROM_QSTR(MP_QSTR_readfrom_into), MP_ROM_PTR(&machine_i2c_readfrom_into_obj) },

{ MP_ROM_QSTR(MP_QSTR_writeto), MP_ROM_PTR(&machine_i2c_writeto_obj) },

// memory operations

// TODO(tannewt): Move these into a separate loadable Python module.

{ MP_ROM_QSTR(MP_QSTR_readfrom_mem), MP_ROM_PTR(&machine_i2c_readfrom_mem_obj) },

{ MP_ROM_QSTR(MP_QSTR_readfrom_mem_into), MP_ROM_PTR(&machine_i2c_readfrom_mem_into_obj) },

{ MP_ROM_QSTR(MP_QSTR_writeto_mem), MP_ROM_PTR(&machine_i2c_writeto_mem_obj) },

};

STATIC MP_DEFINE_CONST_DICT(machine_i2c_locals_dict, machine_i2c_locals_dict_table);

const mp_obj_type_t machine_i2c_type = {

{ &mp_type_type },

.name = MP_QSTR_I2C,

.make_new = machine_i2c_make_new,

.locals_dict = (mp_obj_dict_t*)&machine_i2c_locals_dict,

};

//| :class:`SPI` -- a 3-4 wire serial protocol

//| -----------------------------------------------

//|

//| SPI is a serial protocol that has exlusive pins for data in and out of the

//| master. It is typically faster than `I2C` because a separate pin is used to

//| control the active slave rather than a transitted address. This class only

//| manages three of the four SPI lines: `clock`, `MOSI`, `MISO`. Its up to the

//| client to manage the appropriate slave select line. (This is common because

//| multiple slaves can share the `clock`, `MOSI` and `MISO` lines and therefore

//| the hardware.)

//|

//| .. class:: SPI(clock, MOSI, MISO, baudrate=1000000)

//|

//| Construct an SPI object on the given bus. ``id`` can be only 0.

//| With no additional parameters, the SPI object is created but not

//| initialised (it has the settings from the last initialisation of

//| the bus, if any). If extra arguments are given, the bus is initialised.

//| See ``init`` for parameters of initialisation.

//|

//| - ``clock`` is the pin to use for the clock.

//| - ``MOSI`` is the Master Out Slave In pin.

//| - ``MISO`` is the Master In Slave Out pin.

//| - ``baudrate`` is the SCK clock rate.

//|

// TODO(tannewt): Support LSB SPI.

// TODO(tannewt): Support phase, polarity and bit order.

STATIC mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *pos_args) {

mp_arg_check_num(n_args, n_kw, 0, MP_OBJ_FUN_ARGS_MAX, true);

machine_spi_obj_t *self = m_new_obj(machine_spi_obj_t);

self->base.type = &machine_spi_type;

mp_map_t kw_args;

mp_map_init_fixed_table(&kw_args, n_kw, pos_args + n_args);

enum { ARG_clock, ARG_MOSI, ARG_MISO, ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_clock, MP_ARG_REQUIRED | MP_ARG_OBJ },

{ MP_QSTR_MOSI, MP_ARG_REQUIRED | MP_ARG_OBJ },

{ MP_QSTR_MISO, MP_ARG_REQUIRED | MP_ARG_OBJ },

{ 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 = 400000} },

{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 400000} },

{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },

};

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

mp_arg_parse_all(n_args, pos_args, &kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

// TODO(tannewt): Replace pin_find with a unified version.

const pin_obj_t* clock = pin_find(args[ARG_clock].u_obj);

const pin_obj_t* mosi = pin_find(args[ARG_MOSI].u_obj);

const pin_obj_t* miso = pin_find(args[ARG_MISO].u_obj);

mp_hal_spi_construct(self, clock, mosi, miso, args[ARG_baudrate].u_int);

return (mp_obj_t)self;

}

//| .. method:: SPI.init()

//|

//| Initialises the bus.

//|

STATIC mp_obj_t machine_spi_obj_init(mp_obj_t self_in) {

machine_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_spi_init(self);

return self_in;

}

MP_DEFINE_CONST_FUN_OBJ_1(machine_spi_init_obj, machine_spi_obj_init);

//| .. method:: SPI.deinit()

//|

//| Turn off the SPI bus.

//|

STATIC mp_obj_t machine_spi_obj_deinit(mp_obj_t self_in) {

machine_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_spi_deinit(self);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_1(machine_spi_deinit_obj, machine_spi_obj_deinit);

STATIC mp_obj_t machine_spi_obj___exit__(size_t n_args, const mp_obj_t *args) {

(void)n_args;

mp_hal_spi_deinit(args[0]);

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_spi_obj___exit___obj, 4, 4, machine_spi_obj___exit__);

//| .. method:: SPI.write_readinto(write_buf, read_buf)

//|

//| Write from ``write_buf`` and read into ``read_buf``. Both buffers must have the

//| same length. This is the same as a SPI transfer function on other platforms.

//| Returns the number of bytes written

//|

STATIC mp_obj_t mp_machine_spi_write_readinto(mp_obj_t self_in, mp_obj_t wr_buf, mp_obj_t rd_buf) {

mp_buffer_info_t src;

mp_get_buffer_raise(wr_buf, &src, MP_BUFFER_READ);

mp_buffer_info_t dest;

mp_get_buffer_raise(rd_buf, &dest, MP_BUFFER_WRITE);

if (src.len != dest.len) {

mp_raise_ValueError("buffers must be the same length");

}

machine_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_spi_transfer(self, src.len, (uint8_t *) src.buf, (uint8_t *) dest.buf);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_3(mp_machine_spi_write_readinto_obj, mp_machine_spi_write_readinto);

//| .. method:: SPI.write(buf)

//|

//| Write the data contained in ``buf``.

//| Returns the number of bytes written.

//|

STATIC mp_obj_t mp_machine_spi_write(mp_obj_t self_in, mp_obj_t wr_buf) {

mp_buffer_info_t src;

mp_get_buffer_raise(wr_buf, &src, MP_BUFFER_READ);

machine_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);

mp_hal_spi_transfer(self, src.len, (uint8_t *) src.buf, NULL);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_2(mp_machine_spi_write_obj, mp_machine_spi_write);

//| .. method:: SPI.read(nbytes, *, write=0x00)

//|

//| Read the ``nbytes`` while writing the data specified by ``write``.

//| Return the number of bytes read.

//|

STATIC mp_obj_t mp_machine_spi_read(size_t n_args, const mp_obj_t *args) {

vstr_t vstr;

vstr_init_len(&vstr, mp_obj_get_int(args[1]));

memset(vstr.buf, n_args == 3 ? mp_obj_get_int(args[2]) : 0, vstr.len);

mp_hal_spi_transfer(args[0], vstr.len, (uint8_t *) vstr.buf, (uint8_t *) vstr.buf);

return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);

}

MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_read_obj, 2, 3, mp_machine_spi_read);

//| .. method:: SPI.readinto(buf, *, write=0x00)

//|

//| Read into the buffer specified by ``buf`` while writing the data

//| specified by ``write``.

//| Return the number of bytes read.

//|

STATIC mp_obj_t mp_machine_spi_readinto(size_t n_args, const mp_obj_t *args) {

mp_buffer_info_t bufinfo;

mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_WRITE);

memset(bufinfo.buf, n_args == 3 ? mp_obj_get_int(args[2]) : 0, bufinfo.len);

mp_hal_spi_transfer(args[0], bufinfo.len, (uint8_t *) bufinfo.buf, (uint8_t *) bufinfo.buf);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_readinto_obj, 2, 3, mp_machine_spi_readinto);

STATIC const mp_rom_map_elem_t machine_spi_locals_dict_table[] = {

{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_spi_init_obj) },

{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_spi_deinit_obj) },

{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&machine_spi_init_obj) },

{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&machine_spi_obj___exit___obj) },

// Standard simultaneous read/write transfer.

{ MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&mp_machine_spi_write_readinto_obj) },

// Helper methods.

// TODO(tannewt): Move these into a helper Python class.

{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_machine_spi_read_obj) },

{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_machine_spi_readinto_obj) },

{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_machine_spi_write_obj) },

};

STATIC MP_DEFINE_CONST_DICT(machine_spi_locals_dict, machine_spi_locals_dict_table);

const mp_obj_type_t machine_spi_type = {

{ &mp_type_type },

.name = MP_QSTR_SPI,

.make_new = machine_spi_make_new,

.locals_dict = (mp_obj_dict_t*)&machine_spi_locals_dict,

};