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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 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/microcontroller/Pin.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "nrf_gpio.h"
#include "py/mphal.h"
#include "nrf/pins.h"
#include "supervisor/shared/rgb_led_status.h"
#ifdef MICROPY_HW_NEOPIXEL
bool neopixel_in_use;
#endif
#ifdef MICROPY_HW_APA102_MOSI
bool apa102_sck_in_use;
bool apa102_mosi_in_use;
#endif
#ifdef SPEAKER_ENABLE_PIN
bool speaker_enable_in_use;
#endif
// Bit mask of claimed pins on each of up to two ports. nrf52832 has one port; nrf52840 has two.
STATIC uint32_t claimed_pins[GPIO_COUNT];
STATIC uint32_t never_reset_pins[GPIO_COUNT];
STATIC void reset_speaker_enable_pin(void) {
#ifdef SPEAKER_ENABLE_PIN
speaker_enable_in_use = false;
nrf_gpio_cfg(SPEAKER_ENABLE_PIN->number,
NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT,
NRF_GPIO_PIN_NOPULL,
NRF_GPIO_PIN_H0H1,
NRF_GPIO_PIN_NOSENSE);
nrf_gpio_pin_write(SPEAKER_ENABLE_PIN->number, false);
#endif
}
void reset_all_pins(void) {
for (size_t i = 0; i < GPIO_COUNT; i++) {
claimed_pins[i] = never_reset_pins[i];
}
for (uint32_t pin = 0; pin < NUMBER_OF_PINS; ++pin) {
if ((never_reset_pins[nrf_pin_port(pin)] & (1 << nrf_relative_pin_number(pin))) != 0) {
continue;
}
nrf_gpio_cfg_default(pin);
}
#ifdef MICROPY_HW_NEOPIXEL
neopixel_in_use = false;
#endif
#ifdef MICROPY_HW_APA102_MOSI
apa102_sck_in_use = false;
apa102_mosi_in_use = false;
#endif
// After configuring SWD because it may be shared.
reset_speaker_enable_pin();
}
// Mark pin as free and return it to a quiescent state.
void reset_pin_number(uint8_t pin_number) {
if (pin_number == NO_PIN) {
return;
}
// Clear claimed bit.
claimed_pins[nrf_pin_port(pin_number)] &= ~(1 << nrf_relative_pin_number(pin_number));
#ifdef MICROPY_HW_NEOPIXEL
if (pin_number == MICROPY_HW_NEOPIXEL->number) {
neopixel_in_use = false;
rgb_led_status_init();
return;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin_number == MICROPY_HW_APA102_MOSI->number ||
pin_number == MICROPY_HW_APA102_SCK->number) {
apa102_mosi_in_use = apa102_mosi_in_use && pin_number != MICROPY_HW_APA102_MOSI->number;
apa102_sck_in_use = apa102_sck_in_use && pin_number != MICROPY_HW_APA102_SCK->number;
if (!apa102_sck_in_use && !apa102_mosi_in_use) {
rgb_led_status_init();
}
return;
}
#endif
#ifdef SPEAKER_ENABLE_PIN
if (pin_number == SPEAKER_ENABLE_PIN->number) {
reset_speaker_enable_pin();
}
#endif
}
void never_reset_pin_number(uint8_t pin_number) {
never_reset_pins[nrf_pin_port(pin_number)] |= 1 << nrf_relative_pin_number(pin_number);
}
void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
never_reset_pin_number(pin->number);
}
void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
reset_pin_number(pin->number);
}
void claim_pin(const mcu_pin_obj_t* pin) {
// Set bit in claimed_pins bitmask.
claimed_pins[nrf_pin_port(pin->number)] |= 1 << nrf_relative_pin_number(pin->number);
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
neopixel_in_use = true;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin == MICROPY_HW_APA102_MOSI) {
apa102_mosi_in_use = true;
}
if (pin == MICROPY_HW_APA102_SCK) {
apa102_sck_in_use = true;
}
#endif
#ifdef SPEAKER_ENABLE_PIN
if (pin == SPEAKER_ENABLE_PIN) {
speaker_enable_in_use = true;
}
#endif
}
bool pin_number_is_free(uint8_t pin_number) {
return !(claimed_pins[nrf_pin_port(pin_number)] & (1 << nrf_relative_pin_number(pin_number)));
}
bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
return !neopixel_in_use;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin == MICROPY_HW_APA102_MOSI) {
return !apa102_mosi_in_use;
}
if (pin == MICROPY_HW_APA102_SCK) {
return !apa102_sck_in_use;
}
#endif
#ifdef SPEAKER_ENABLE_PIN
if (pin == SPEAKER_ENABLE_PIN) {
return !speaker_enable_in_use;
}
#endif
#ifdef NRF52840
// If NFC pins are enabled for NFC, don't allow them to be used for GPIO.
if (((NRF_UICR->NFCPINS & UICR_NFCPINS_PROTECT_Msk) ==
(UICR_NFCPINS_PROTECT_NFC << UICR_NFCPINS_PROTECT_Pos)) &&
(pin->number == 9 || pin->number == 10)) {
return false;
}
#endif
return pin_number_is_free(pin->number);
}
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