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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
* Copyright (c) 2019 Artur Pacholec
* Copyright (c) 2020 Lucian Copeland 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/__init__.h"
#include "shared-bindings/microcontroller/Pin.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
STATIC bool claimed_pins[IOMUXC_SW_PAD_CTL_PAD_COUNT];
STATIC bool never_reset_pins[IOMUXC_SW_PAD_CTL_PAD_COUNT];
// There are two numbering systems used here:
// IOMUXC index, used for iterating through pins and accessing reset information,
// and GPIO port and number, used to store claimed and reset tagging. The two number
// systems are not related and one cannot determine the other without a pin object
void reset_all_pins(void) {
for (uint8_t i = 0; i < IOMUXC_SW_PAD_CTL_PAD_COUNT; i++) {
claimed_pins[i] = never_reset_pins[i];
}
for (uint8_t i = 0; i < IOMUXC_SW_PAD_CTL_PAD_COUNT; i++) {
if(!never_reset_pins[i]) {
IOMUXC->SW_MUX_CTL_PAD[i] = ((mcu_pin_obj_t*)(mcu_pin_globals.map.table[i].value))->mux_reset;
IOMUXC->SW_PAD_CTL_PAD[i] = ((mcu_pin_obj_t*)(mcu_pin_globals.map.table[i].value))->pad_reset;
}
}
#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
}
// Since i.MX pins need extra register and reset information to reset properly,
// resetting pins by number alone has been removed.
void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
never_reset_pins[pin->mux_idx] = false;
claimed_pins[pin->mux_idx] = false;
*(uint32_t*)pin->mux_reg = pin->mux_reset;
*(uint32_t*)pin->cfg_reg = pin->pad_reset;
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
neopixel_in_use = false;
rgb_led_status_init();
return;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin->mux_idx == MICROPY_HW_APA102_MOSI->mux_idx ||
pin->mux_idx == MICROPY_HW_APA102_SCK->mux_idx) {
apa102_mosi_in_use = apa102_mosi_in_use && pin->mux_idx != MICROPY_HW_APA102_MOSI->mux_idx;
apa102_sck_in_use = apa102_sck_in_use && pin->mux_idx != MICROPY_HW_APA102_SCK->mux_idx;
if (!apa102_sck_in_use && !apa102_mosi_in_use) {
rgb_led_status_init();
}
return;
}
#endif
}
void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
never_reset_pins[pin->mux_idx] = true;
}
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
return !claimed_pins[pin->mux_idx];
}
uint8_t common_hal_mcu_pin_number(const mcu_pin_obj_t* pin) {
return pin->mux_idx; // returns IOMUXC to align with pin table
}
void common_hal_mcu_pin_claim(const mcu_pin_obj_t* pin) {
claimed_pins[pin->mux_idx] = true;
#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
}
void claim_pin(const mcu_pin_obj_t* pin) {
common_hal_mcu_pin_claim(pin);
}
void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
common_hal_reset_pin((mcu_pin_obj_t*)(mcu_pin_globals.map.table[pin_no].value));
}
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