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106 lines
4.1 KiB
106 lines
4.1 KiB
/*
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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) 2020-2021 Damien P. George
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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/mphal.h"
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#include "py/runtime.h"
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#include "drivers/dht/dht.h"
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#include "modrp2.h"
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#include "pico/stdlib.h"
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#include "hardware/gpio.h"
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#include "hardware/sync.h"
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#include "hardware/structs/ioqspi.h"
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#include "hardware/structs/sio.h"
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#if MICROPY_PY_NETWORK_CYW43
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#include "extmod/modnetwork.h"
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#endif
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#if MICROPY_PY_NETWORK_CYW43
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MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mod_network_country_obj);
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#endif
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// Improved version of
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// https://github.com/raspberrypi/pico-examples/blob/master/picoboard/button/button.c
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static bool __no_inline_not_in_flash_func(bootsel_button)(void) {
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const uint CS_PIN_INDEX = 1;
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// Disable interrupts and the other core since they might be
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// executing code from flash and we are about to temporarily
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// disable flash access.
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mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
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// Set the CS pin to high impedance.
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hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
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(GPIO_OVERRIDE_LOW << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB),
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IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
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// Delay without calling any functions in flash.
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uint32_t start = timer_hw->timerawl;
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while ((uint32_t)(timer_hw->timerawl - start) <= MICROPY_HW_BOOTSEL_DELAY_US) {
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;
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}
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// The HI GPIO registers in SIO can observe and control the 6 QSPI pins.
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// The button pulls the QSPI_SS pin *low* when pressed.
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bool button_state = !(sio_hw->gpio_hi_in & (1 << CS_PIN_INDEX));
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// Restore the QSPI_SS pin so we can use flash again.
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hw_write_masked(&ioqspi_hw->io[CS_PIN_INDEX].ctrl,
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(GPIO_OVERRIDE_NORMAL << IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_LSB),
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IO_QSPI_GPIO_QSPI_SS_CTRL_OEOVER_BITS);
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MICROPY_END_ATOMIC_SECTION(atomic_state);
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return button_state;
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}
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static mp_obj_t rp2_bootsel_button(void) {
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return MP_OBJ_NEW_SMALL_INT(bootsel_button());
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}
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MP_DEFINE_CONST_FUN_OBJ_0(rp2_bootsel_button_obj, rp2_bootsel_button);
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static const mp_rom_map_elem_t rp2_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_rp2) },
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{ MP_ROM_QSTR(MP_QSTR_Flash), MP_ROM_PTR(&rp2_flash_type) },
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{ MP_ROM_QSTR(MP_QSTR_PIO), MP_ROM_PTR(&rp2_pio_type) },
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{ MP_ROM_QSTR(MP_QSTR_StateMachine), MP_ROM_PTR(&rp2_state_machine_type) },
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{ MP_ROM_QSTR(MP_QSTR_DMA), MP_ROM_PTR(&rp2_dma_type) },
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{ MP_ROM_QSTR(MP_QSTR_bootsel_button), MP_ROM_PTR(&rp2_bootsel_button_obj) },
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#if MICROPY_PY_NETWORK_CYW43
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// Deprecated (use network.country instead).
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{ MP_ROM_QSTR(MP_QSTR_country), MP_ROM_PTR(&mod_network_country_obj) },
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#endif
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};
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static MP_DEFINE_CONST_DICT(rp2_module_globals, rp2_module_globals_table);
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const mp_obj_module_t mp_module_rp2 = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&rp2_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR__rp2, mp_module_rp2);
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