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/*
* 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 "py/runtime.h"
#ifdef CIRCUITPY_DISPLAYIO
#include "shared-module/displayio/__init__.h"
#endif
#if BOARD_I2C
mp_obj_t common_hal_board_get_i2c(void) {
return MP_STATE_VM(shared_i2c_bus);
}
mp_obj_t common_hal_board_create_i2c(void) {
busio_i2c_obj_t *self = m_new_ll_obj(busio_i2c_obj_t);
self->base.type = &busio_i2c_type;
common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 0);
MP_STATE_VM(shared_i2c_bus) = MP_OBJ_FROM_PTR(self);
return MP_STATE_VM(shared_i2c_bus);
}
#endif
#if BOARD_SPI
// Statically allocate the SPI object so it can live past the end of the heap and into the next VM.
// That way it can be used by built-in FourWire displays and be accessible through board.SPI().
STATIC busio_spi_obj_t spi_obj;
STATIC mp_obj_t spi_singleton = NULL;
mp_obj_t common_hal_board_get_spi(void) {
return spi_singleton;
}
mp_obj_t common_hal_board_create_spi(void) {
if (spi_singleton != NULL) {
return spi_singleton;
}
busio_spi_obj_t *self = &spi_obj;
self->base.type = &busio_spi_type;
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;
}
#endif
#if BOARD_UART
mp_obj_t common_hal_board_get_uart(void) {
return MP_STATE_VM(shared_uart_bus);
}
mp_obj_t common_hal_board_create_uart(void) {
busio_uart_obj_t *self = m_new_ll_obj(busio_uart_obj_t);
self->base.type = &busio_uart_type;
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);
MP_STATE_VM(shared_uart_bus) = MP_OBJ_FROM_PTR(self);
return MP_STATE_VM(shared_uart_bus);
}
#endif
void reset_board_busses(void) {
#if BOARD_I2C
MP_STATE_VM(shared_i2c_bus) = NULL;
#endif
#if BOARD_SPI
bool display_using_spi = false;
#if CIRCUITPY_DISPLAYIO
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].fourwire_bus.bus == spi_singleton) {
display_using_spi = true;
break;
}
}
#endif
if (!display_using_spi) {
spi_singleton = NULL;
}
#endif
#if BOARD_UART
MP_STATE_VM(shared_uart_bus) = NULL;
#endif
}
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