circuitpython/ports/atmel-samd/board_busses.c

130 lines
4.3 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
*
* 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/busio/I2C.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/busio/UART.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "supervisor/shared/translate.h"
#include "mpconfigboard.h"
#include "samd/pins.h"
#include "py/runtime.h"
#define BOARD_I2C (defined(DEFAULT_I2C_BUS_SDA) && defined(DEFAULT_I2C_BUS_SCL))
#define BOARD_SPI (defined(DEFAULT_SPI_BUS_SCK) && defined(DEFAULT_SPI_BUS_MISO) && defined(DEFAULT_SPI_BUS_MOSI))
#define BOARD_UART (defined(DEFAULT_UART_BUS_RX) && defined(DEFAULT_UART_BUS_TX))
#if BOARD_I2C
STATIC mp_obj_t i2c_singleton = NULL;
STATIC mp_obj_t board_i2c(void) {
if (i2c_singleton == NULL) {
busio_i2c_obj_t *self = m_new_obj(busio_i2c_obj_t);
self->base.type = &busio_i2c_type;
assert_pin_free(DEFAULT_I2C_BUS_SDA);
assert_pin_free(DEFAULT_I2C_BUS_SCL);
common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 0);
i2c_singleton = (mp_obj_t)self;
}
return i2c_singleton;
}
#else
STATIC mp_obj_t board_i2c(void) {
mp_raise_NotImplementedError(translate("No default I2C bus"));
return NULL;
}
#endif
MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
#if BOARD_SPI
STATIC mp_obj_t spi_singleton = NULL;
STATIC mp_obj_t board_spi(void) {
if (spi_singleton == NULL) {
busio_spi_obj_t *self = m_new_obj(busio_spi_obj_t);
self->base.type = &busio_spi_type;
assert_pin_free(DEFAULT_SPI_BUS_SCK);
assert_pin_free(DEFAULT_SPI_BUS_MOSI);
assert_pin_free(DEFAULT_SPI_BUS_MISO);
const mcu_pin_obj_t* clock = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_SCK);
const mcu_pin_obj_t* mosi = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MOSI);
const mcu_pin_obj_t* miso = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MISO);
common_hal_busio_spi_construct(self, clock, mosi, miso);
spi_singleton = (mp_obj_t)self;
}
return spi_singleton;
}
#else
STATIC mp_obj_t board_spi(void) {
mp_raise_NotImplementedError(translate("No default SPI bus"));
return NULL;
}
#endif
MP_DEFINE_CONST_FUN_OBJ_0(board_spi_obj, board_spi);
#if BOARD_UART
STATIC mp_obj_t uart_singleton = NULL;
STATIC mp_obj_t board_uart(void) {
if (uart_singleton == NULL) {
busio_uart_obj_t *self = m_new_obj(busio_uart_obj_t);
self->base.type = &busio_uart_type;
assert_pin_free(DEFAULT_UART_BUS_RX);
assert_pin_free(DEFAULT_UART_BUS_TX);
const mcu_pin_obj_t* rx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RX);
const mcu_pin_obj_t* tx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_TX);
common_hal_busio_uart_construct(self, tx, rx, 9600, 8, PARITY_NONE, 1, 1000, 64);
uart_singleton = (mp_obj_t)self;
}
return uart_singleton;
}
#else
STATIC mp_obj_t board_uart(void) {
mp_raise_NotImplementedError(translate("No default UART bus"));
return NULL;
}
#endif
MP_DEFINE_CONST_FUN_OBJ_0(board_uart_obj, board_uart);
void reset_board_busses(void) {
#if BOARD_I2C
i2c_singleton = NULL;
#endif
#if BOARD_SPI
spi_singleton = NULL;
#endif
#if BOARD_UART
uart_singleton = NULL;
#endif
}