143 lines
4.2 KiB
C
143 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) 2021 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 "py/runtime.h"
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#include "common-hal/microcontroller/__init__.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
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#if CIRCUITPY_CYW43
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#include "bindings/cyw43/__init__.h"
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#include "pico/cyw43_arch.h"
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bool cyw_ever_init;
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static uint32_t cyw_pin_claimed;
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void reset_pin_number_cyw(uint8_t pin_no) {
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cyw_pin_claimed &= ~(1 << pin_no);
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}
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#endif
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STATIC uint32_t never_reset_pins;
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void reset_all_pins(void) {
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for (size_t i = 0; i < NUM_BANK0_GPIOS; i++) {
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if ((never_reset_pins & (1 << i)) != 0) {
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continue;
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}
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reset_pin_number(i);
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}
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#if CIRCUITPY_CYW43
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if (cyw_ever_init) {
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// reset LED and SMPS_MODE to Low; don't touch VBUS_SENSE
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// otherwise it is switched to output mode forever!
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cyw43_arch_gpio_put(0, 0);
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cyw43_arch_gpio_put(1, 0);
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}
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cyw_pin_claimed = 0;
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#endif
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}
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void never_reset_pin_number(uint8_t pin_number) {
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if (pin_number >= NUM_BANK0_GPIOS) {
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return;
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}
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never_reset_pins |= 1 << pin_number;
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}
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void reset_pin_number(uint8_t pin_number) {
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if (pin_number >= NUM_BANK0_GPIOS) {
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return;
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}
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never_reset_pins &= ~(1 << pin_number);
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// We are very aggressive in shutting down the pad fully. Both pulls are
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// disabled and both buffers are as well.
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gpio_init(pin_number);
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hw_clear_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_IE_BITS |
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PADS_BANK0_GPIO0_PUE_BITS |
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PADS_BANK0_GPIO0_PDE_BITS);
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hw_set_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_OD_BITS);
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}
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void common_hal_never_reset_pin(const mcu_pin_obj_t *pin) {
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never_reset_pin_number(pin->number);
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}
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void common_hal_reset_pin(const mcu_pin_obj_t *pin) {
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#if CIRCUITPY_CYW43
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if (pin->base.type == &cyw43_pin_type) {
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reset_pin_number_cyw(pin->number);
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return;
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}
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#endif
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reset_pin_number(pin->number);
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}
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void claim_pin(const mcu_pin_obj_t *pin) {
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#if CIRCUITPY_CYW43
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if (pin->base.type == &cyw43_pin_type) {
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cyw_pin_claimed |= (1 << pin->number);
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}
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#endif
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// Nothing to do because all changes will set the GPIO settings.
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}
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bool pin_number_is_free(uint8_t pin_number) {
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if (pin_number >= NUM_BANK0_GPIOS) {
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return false;
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}
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uint32_t pad_state = padsbank0_hw->io[pin_number];
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return (pad_state & PADS_BANK0_GPIO0_IE_BITS) == 0 &&
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(pad_state & PADS_BANK0_GPIO0_OD_BITS) != 0;
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}
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
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#if CIRCUITPY_CYW43
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if (pin->base.type == &cyw43_pin_type) {
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return !(cyw_pin_claimed & (1 << pin->number));
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}
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#endif
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return pin_number_is_free(pin->number);
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}
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uint8_t common_hal_mcu_pin_number(const mcu_pin_obj_t *pin) {
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return pin->number;
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}
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void common_hal_mcu_pin_claim(const mcu_pin_obj_t *pin) {
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return claim_pin(pin);
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}
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void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
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reset_pin_number(pin_no);
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}
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