circuitpython/ports/esp32/mphalport.h

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * Development of the code in this file was sponsored by Microbric Pty Ltd
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Damien P. George
 *
 * 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.
 */

#ifndef INCLUDED_MPHALPORT_H
#define INCLUDED_MPHALPORT_H

#include "py/ringbuf.h"
#include "shared/runtime/interrupt_char.h"

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

#define MICROPY_PLATFORM_VERSION "IDF" IDF_VER

// The core that the MicroPython task(s) are pinned to.
// Now that we have IDF 4.2.0+, we are once again able to pin to core 1
// and avoid the Wifi/BLE timing problems on the same core.
// Best effort here to remain backwards compatible in rare version edge cases...
// See https://github.com/micropython/micropython/issues/5489 for history
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 2, 0)
#define MP_TASK_COREID (1)
#else
#define MP_TASK_COREID (0)
#endif

extern TaskHandle_t mp_main_task_handle;

extern ringbuf_t stdin_ringbuf;

// Check the ESP-IDF error code and raise an OSError if it's not ESP_OK.
void check_esp_err(esp_err_t code);

uint32_t mp_hal_ticks_us(void);
__attribute__((always_inline)) static inline uint32_t mp_hal_ticks_cpu(void) {
    uint32_t ccount;
    #if CONFIG_IDF_TARGET_ESP32C3
    __asm__ __volatile__ ("csrr %0, 0x7E2" : "=r" (ccount)); // Machine Performance Counter Value
    #else
    __asm__ __volatile__ ("rsr %0,ccount" : "=a" (ccount));
    #endif
    return ccount;
}

void mp_hal_delay_us(uint32_t);
#define mp_hal_delay_us_fast(us) ets_delay_us(us)
void mp_hal_set_interrupt_char(int c);
uint32_t mp_hal_get_cpu_freq(void);

#define mp_hal_quiet_timing_enter() MICROPY_BEGIN_ATOMIC_SECTION()
#define mp_hal_quiet_timing_exit(irq_state) MICROPY_END_ATOMIC_SECTION(irq_state)

// Wake up the main task if it is sleeping
void mp_hal_wake_main_task_from_isr(void);

// C-level pin HAL
#include "py/obj.h"
#include "driver/gpio.h"
#define MP_HAL_PIN_FMT "%u"
#define mp_hal_pin_obj_t gpio_num_t
mp_hal_pin_obj_t machine_pin_get_id(mp_obj_t pin_in);
#define mp_hal_get_pin_obj(o) machine_pin_get_id(o)
#define mp_obj_get_pin(o) machine_pin_get_id(o) // legacy name; only to support esp8266/modonewire
#define mp_hal_pin_name(p) (p)
static inline void mp_hal_pin_input(mp_hal_pin_obj_t pin) {
    gpio_pad_select_gpio(pin);
    gpio_set_direction(pin, GPIO_MODE_INPUT);
}
static inline void mp_hal_pin_output(mp_hal_pin_obj_t pin) {
    gpio_pad_select_gpio(pin);
    gpio_set_direction(pin, GPIO_MODE_INPUT_OUTPUT);
}
static inline void mp_hal_pin_open_drain(mp_hal_pin_obj_t pin) {
    gpio_pad_select_gpio(pin);
    gpio_set_direction(pin, GPIO_MODE_INPUT_OUTPUT_OD);
}
static inline void mp_hal_pin_od_low(mp_hal_pin_obj_t pin) {
    gpio_set_level(pin, 0);
}
static inline void mp_hal_pin_od_high(mp_hal_pin_obj_t pin) {
    gpio_set_level(pin, 1);
}
static inline int mp_hal_pin_read(mp_hal_pin_obj_t pin) {
    return gpio_get_level(pin);
}
static inline void mp_hal_pin_write(mp_hal_pin_obj_t pin, int v) {
    gpio_set_level(pin, v);
}

#endif // INCLUDED_MPHALPORT_H