99a3750a2c
After calling board.SPI().deinit(), calling board.SPI() again would return the unusable deinited object and there was no way of getting it back into an initialized state until the end of the session.
127 lines
4.2 KiB
C
127 lines
4.2 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) 2016 Scott Shawcroft
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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 "py/obj.h"
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#include "py/runtime.h"
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#include "shared-bindings/board/__init__.h"
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#if BOARD_I2C
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#include "shared-bindings/busio/I2C.h"
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#endif
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#if BOARD_SPI
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#include "shared-bindings/busio/SPI.h"
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#endif
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//| """Board specific pin names
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//|
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//| Common container for board base pin names. These will vary from board to
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//| board so don't expect portability when using this module.
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//|
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//| .. warning:: The board module varies by board. The APIs documented here may or may not be
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//| available on a specific board."""
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//| def I2C() -> busio.I2C:
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//| """Returns the `busio.I2C` object for the board designated SDA and SCL pins. It is a singleton."""
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//| ...
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//|
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#if BOARD_I2C
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mp_obj_t board_i2c(void) {
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mp_obj_t singleton = common_hal_board_get_i2c();
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if (singleton != NULL && !common_hal_busio_i2c_deinited(singleton)) {
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return singleton;
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}
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assert_pin_free(DEFAULT_I2C_BUS_SDA);
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assert_pin_free(DEFAULT_I2C_BUS_SCL);
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return common_hal_board_create_i2c();
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}
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#else
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mp_obj_t board_i2c(void) {
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mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_I2C);
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return NULL;
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}
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#endif
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MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
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//| def SPI() -> busio.SPI:
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//| """Returns the `busio.SPI` object for the board designated SCK, MOSI and MISO pins. It is a
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//| singleton."""
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//| ...
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//|
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#if BOARD_SPI
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mp_obj_t board_spi(void) {
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mp_obj_t singleton = common_hal_board_get_spi();
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if (singleton != NULL && !common_hal_busio_spi_deinited(singleton)) {
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return singleton;
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}
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assert_pin_free(DEFAULT_SPI_BUS_SCK);
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assert_pin_free(DEFAULT_SPI_BUS_MOSI);
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assert_pin_free(DEFAULT_SPI_BUS_MISO);
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return common_hal_board_create_spi();
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}
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#else
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mp_obj_t board_spi(void) {
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mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_SPI);
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return NULL;
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}
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#endif
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MP_DEFINE_CONST_FUN_OBJ_0(board_spi_obj, board_spi);
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//| def UART() -> busio.UART:
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//| """Returns the `busio.UART` object for the board designated TX and RX pins. It is a singleton.
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//|
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//| The object created uses the default parameter values for `busio.UART`. If you need to set
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//| parameters that are not changeable after creation, such as ``receiver_buffer_size``,
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//| do not use `board.UART()`; instead create a `busio.UART` object explicitly with the
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//| desired parameters."""
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//| ...
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//|
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#if BOARD_UART
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mp_obj_t board_uart(void) {
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mp_obj_t singleton = common_hal_board_get_uart();
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if (singleton != NULL) {
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return singleton;
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}
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assert_pin_free(DEFAULT_UART_BUS_RX);
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assert_pin_free(DEFAULT_UART_BUS_TX);
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return common_hal_board_create_uart();
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}
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#else
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mp_obj_t board_uart(void) {
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mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_UART);
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return NULL;
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}
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#endif
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MP_DEFINE_CONST_FUN_OBJ_0(board_uart_obj, board_uart);
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const mp_obj_module_t board_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&board_module_globals,
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};
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