183 lines
6.3 KiB
C
183 lines
6.3 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) 2018 Scott Shawcroft for Adafruit Industries
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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 "shared-bindings/microcontroller/Pin.h"
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#include "supervisor/shared/translate.h"
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#include "mpconfigboard.h"
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#include "py/runtime.h"
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#if CIRCUITPY_BUSIO
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#include "shared-bindings/busio/I2C.h"
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#include "shared-bindings/busio/SPI.h"
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#include "shared-bindings/busio/UART.h"
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#endif
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#if CIRCUITPY_DISPLAYIO
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#include "shared-module/displayio/__init__.h"
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#endif
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#if CIRCUITPY_SHARPDISPLAY
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#include "shared-bindings/sharpdisplay/SharpMemoryFramebuffer.h"
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#include "shared-module/sharpdisplay/SharpMemoryFramebuffer.h"
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#endif
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#if BOARD_I2C
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// Statically allocate the I2C object so it can live past the end of the heap and into the next VM.
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// That way it can be used by built-in I2CDisplay displays and be accessible through board.I2C().
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STATIC busio_i2c_obj_t i2c_obj;
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STATIC mp_obj_t i2c_singleton = NULL;
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mp_obj_t common_hal_board_get_i2c(void) {
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return i2c_singleton;
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}
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mp_obj_t common_hal_board_create_i2c(void) {
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// All callers have either already verified this or come so early that it can't be otherwise.
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assert(i2c_singleton == NULL || common_hal_busio_i2c_deinited(i2c_singleton));
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busio_i2c_obj_t *self = &i2c_obj;
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self->base.type = &busio_i2c_type;
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common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 100000, 255);
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i2c_singleton = (mp_obj_t)self;
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return i2c_singleton;
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}
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#endif
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#if BOARD_SPI
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// Statically allocate the SPI object so it can live past the end of the heap and into the next VM.
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// That way it can be used by built-in FourWire displays and be accessible through board.SPI().
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STATIC busio_spi_obj_t spi_obj;
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STATIC mp_obj_t spi_singleton = NULL;
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mp_obj_t common_hal_board_get_spi(void) {
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return spi_singleton;
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}
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mp_obj_t common_hal_board_create_spi(void) {
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// All callers have either already verified this or come so early that it can't be otherwise.
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assert(spi_singleton == NULL || common_hal_busio_spi_deinited(spi_singleton));
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busio_spi_obj_t *self = &spi_obj;
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self->base.type = &busio_spi_type;
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const mcu_pin_obj_t *clock = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_SCK);
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const mcu_pin_obj_t *mosi = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MOSI);
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const mcu_pin_obj_t *miso = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MISO);
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common_hal_busio_spi_construct(self, clock, mosi, miso);
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spi_singleton = (mp_obj_t)self;
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return spi_singleton;
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}
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#endif
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#if BOARD_UART
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mp_obj_t common_hal_board_get_uart(void) {
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return MP_STATE_VM(shared_uart_bus);
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}
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mp_obj_t common_hal_board_create_uart(void) {
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busio_uart_obj_t *self = m_new_ll_obj(busio_uart_obj_t);
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self->base.type = &busio_uart_type;
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const mcu_pin_obj_t *rx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RX);
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const mcu_pin_obj_t *tx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_TX);
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#ifdef DEFAULT_UART_BUS_RTS
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const mcu_pin_obj_t *rts = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RTS);
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#else
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const mcu_pin_obj_t *rts = NULL;
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#endif
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#ifdef DEFAULT_UART_BUS_CTS
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const mcu_pin_obj_t *cts = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_CTS);
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#else
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const mcu_pin_obj_t *cts = NULL;
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#endif
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#ifdef DEFAULT_UART_IS_RS485
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const mcu_pin_obj_t *rs485_dir = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RS485DIR);
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#ifdef DEFAULT_UART_RS485_INVERT
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const bool rs485_invert = true;
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#else
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const bool rs485_invert = false;
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#endif
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#else
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const mcu_pin_obj_t *rs485_dir = NULL;
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const bool rs485_invert = false;
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#endif
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common_hal_busio_uart_construct(self, tx, rx, rts, cts, rs485_dir, rs485_invert,
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9600, 8, BUSIO_UART_PARITY_NONE, 1, 1.0f, 64, NULL, false);
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MP_STATE_VM(shared_uart_bus) = MP_OBJ_FROM_PTR(self);
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return MP_STATE_VM(shared_uart_bus);
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}
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#endif
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void reset_board_busses(void) {
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#if BOARD_I2C
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bool display_using_i2c = false;
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#if CIRCUITPY_DISPLAYIO
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for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
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if (displays[i].bus_base.type == &displayio_i2cdisplay_type && displays[i].i2cdisplay_bus.bus == i2c_singleton) {
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display_using_i2c = true;
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break;
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}
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}
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#endif
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if (i2c_singleton != NULL) {
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if (!display_using_i2c) {
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common_hal_busio_i2c_deinit(i2c_singleton);
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i2c_singleton = NULL;
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}
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}
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#endif
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#if BOARD_SPI
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bool display_using_spi = false;
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#if CIRCUITPY_DISPLAYIO
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for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
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mp_const_obj_t bus_type = displays[i].bus_base.type;
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if (bus_type == &displayio_fourwire_type && displays[i].fourwire_bus.bus == spi_singleton) {
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display_using_spi = true;
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break;
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}
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#if CIRCUITPY_SHARPDISPLAY
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if (displays[i].bus_base.type == &sharpdisplay_framebuffer_type && displays[i].sharpdisplay.bus == spi_singleton) {
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display_using_spi = true;
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break;
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}
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#endif
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}
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#endif
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// make sure SPI lock is not held over a soft reset
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if (spi_singleton != NULL) {
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common_hal_busio_spi_unlock(spi_singleton);
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if (!display_using_spi) {
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common_hal_busio_spi_deinit(spi_singleton);
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spi_singleton = NULL;
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}
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}
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#endif
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#if BOARD_UART
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MP_STATE_VM(shared_uart_bus) = NULL;
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#endif
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}
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