90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
/*
|
|
* 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"
|
|
|
|
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++) {
|
|
mcu_pin_obj_t *pin = mcu_pin_globals.map.table[i].value;
|
|
if (never_reset_pins[pin->mux_idx]) {
|
|
continue;
|
|
}
|
|
*(uint32_t *)pin->mux_reg = pin->mux_reset;
|
|
*(uint32_t *)pin->cfg_reg = pin->pad_reset;
|
|
}
|
|
}
|
|
|
|
// 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) {
|
|
if (pin == NULL) {
|
|
return;
|
|
}
|
|
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;
|
|
}
|
|
|
|
void common_hal_never_reset_pin(const mcu_pin_obj_t *pin) {
|
|
if (pin == NULL) {
|
|
return;
|
|
}
|
|
never_reset_pins[pin->mux_idx] = true;
|
|
}
|
|
|
|
bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
|
|
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;
|
|
}
|
|
|
|
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));
|
|
}
|