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modbuiltins.c

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  • modmachine.c 10.27 KiB
    /*
     * This file is part of the MicroPython project, http://micropython.org/
     *
     * The MIT License (MIT)
     *
     * Copyright (c) 2013-2015 Damien P. George
     * Copyright (c) 2016 Paul Sokolovsky
     *
     * 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 <stdint.h>
    #include <stdio.h>
    
    #include "py/obj.h"
    #include "py/runtime.h"
    #include "extmod/machine_mem.h"
    #include "extmod/machine_pulse.h"
    #include "extmod/machine_i2c.h"
    #include "modmachine.h"
    
    #include "xtirq.h"
    #include "os_type.h"
    #include "osapi.h"
    #include "etshal.h"
    #include "ets_alt_task.h"
    #include "user_interface.h"
    
    #if MICROPY_PY_MACHINE
    
    //#define MACHINE_WAKE_IDLE (0x01)
    //#define MACHINE_WAKE_SLEEP (0x02)
    #define MACHINE_WAKE_DEEPSLEEP (0x04)
    
    extern const mp_obj_type_t esp_wdt_type;
    
    STATIC mp_obj_t machine_freq(mp_uint_t n_args, const mp_obj_t *args) {
        if (n_args == 0) {
            // get
            return mp_obj_new_int(system_get_cpu_freq() * 1000000);
        } else {
            // set
            mp_int_t freq = mp_obj_get_int(args[0]) / 1000000;
            if (freq != 80 && freq != 160) {
                nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
                        "frequency can only be either 80Mhz or 160MHz"));
            }
            system_update_cpu_freq(freq);
            return mp_const_none;
        }
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_freq_obj, 0, 1, machine_freq);
    
    STATIC mp_obj_t machine_reset(void) {
        system_restart();
        return mp_const_none;
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);
    
    STATIC mp_obj_t machine_reset_cause(void) {
        return MP_OBJ_NEW_SMALL_INT(system_get_rst_info()->reason);
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_cause_obj, machine_reset_cause);
    
    STATIC mp_obj_t machine_unique_id(void) {
        uint32_t id = system_get_chip_id();
        return mp_obj_new_bytes((byte*)&id, sizeof(id));
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
    
    STATIC mp_obj_t machine_idle(void) {
        uint32_t t = mp_hal_ticks_cpu();
        asm("waiti 0");
        t = mp_hal_ticks_cpu() - t;
        return MP_OBJ_NEW_SMALL_INT(t);
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
    
    STATIC mp_obj_t machine_sleep(void) {
        printf("Warning: not yet implemented\n");
        return mp_const_none;
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_sleep_obj, machine_sleep);
    
    STATIC mp_obj_t machine_deepsleep(void) {
        // default to sleep forever
        uint32_t sleep_us = 0;
    
        // see if RTC.ALARM0 should wake the device
        if (pyb_rtc_alarm0_wake & MACHINE_WAKE_DEEPSLEEP) {
            uint64_t t = pyb_rtc_get_us_since_2000();
            if (pyb_rtc_alarm0_expiry <= t) {
                sleep_us = 1; // alarm already expired so wake immediately
            } else {
                uint64_t delta = pyb_rtc_alarm0_expiry - t;
                if (delta <= 0xffffffff) {
                    // sleep for the desired time
                    sleep_us = delta;
                } else {
                    // overflow, just set to maximum sleep time
                    sleep_us = 0xffffffff;
                }
            }
        }
    
        // prepare for RTC reset at wake up
        rtc_prepare_deepsleep(sleep_us);
        // put the device in a deep-sleep state
        system_deep_sleep_set_option(0); // default power down mode; TODO check this
        system_deep_sleep(sleep_us);
    
        for (;;) {
            // we must not return
            ets_loop_iter();
        }
    
        return mp_const_none;
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_deepsleep_obj, machine_deepsleep);
    
    typedef struct _esp_timer_obj_t {
        mp_obj_base_t base;
        os_timer_t timer;
        mp_obj_t callback;
    } esp_timer_obj_t;
    
    const mp_obj_type_t esp_timer_type;
    
    STATIC void esp_timer_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
        esp_timer_obj_t *self = self_in;
        mp_printf(print, "Timer(%p)", &self->timer);
    }
    
    STATIC mp_obj_t esp_timer_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
        mp_arg_check_num(n_args, n_kw, 1, 1, false);
        esp_timer_obj_t *tim = m_new_obj(esp_timer_obj_t);
        tim->base.type = &esp_timer_type;
        return tim;
    }
    
    STATIC void esp_timer_cb(void *arg) {
        esp_timer_obj_t *self = arg;
        mp_call_function_1_protected(self->callback, self);
    }
    
    STATIC mp_obj_t esp_timer_init_helper(esp_timer_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
        static const mp_arg_t allowed_args[] = {
    //        { MP_QSTR_freq,         MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
            { MP_QSTR_period,       MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
            { MP_QSTR_mode,         MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
            { MP_QSTR_callback,     MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
        };
    
        // parse args
        mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
        mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
    
        self->callback = args[2].u_obj;
        // Be sure to disarm timer before making any changes
        os_timer_disarm(&self->timer);
        os_timer_setfn(&self->timer, esp_timer_cb, self);
        os_timer_arm(&self->timer, args[0].u_int, args[1].u_int);
    
        return mp_const_none;
    }
    
    STATIC mp_obj_t esp_timer_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
        return esp_timer_init_helper(args[0], n_args - 1, args + 1, kw_args);
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_KW(esp_timer_init_obj, 1, esp_timer_init);
    
    STATIC mp_obj_t esp_timer_deinit(mp_obj_t self_in) {
        esp_timer_obj_t *self = self_in;
        os_timer_disarm(&self->timer);
        return mp_const_none;
    }
    STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp_timer_deinit_obj, esp_timer_deinit);
    
    STATIC const mp_map_elem_t esp_timer_locals_dict_table[] = {
        { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&esp_timer_deinit_obj },
        { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&esp_timer_init_obj },
    //    { MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&esp_timer_callback_obj },
        { MP_OBJ_NEW_QSTR(MP_QSTR_ONE_SHOT), MP_OBJ_NEW_SMALL_INT(false) },
        { MP_OBJ_NEW_QSTR(MP_QSTR_PERIODIC), MP_OBJ_NEW_SMALL_INT(true) },
    };
    STATIC MP_DEFINE_CONST_DICT(esp_timer_locals_dict, esp_timer_locals_dict_table);
    
    const mp_obj_type_t esp_timer_type = {
        { &mp_type_type },
        .name = MP_QSTR_Timer,
        .print = esp_timer_print,
        .make_new = esp_timer_make_new,
        .locals_dict = (mp_obj_t)&esp_timer_locals_dict,
    };
    
    // this bit is unused in the Xtensa PS register
    #define ETS_LOOP_ITER_BIT (12)
    
    STATIC mp_obj_t machine_disable_irq(void) {
        uint32_t state = disable_irq();
        state = (state & ~(1 << ETS_LOOP_ITER_BIT)) | (ets_loop_iter_disable << ETS_LOOP_ITER_BIT);
        ets_loop_iter_disable = 1;
        return mp_obj_new_int(state);
    }
    MP_DEFINE_CONST_FUN_OBJ_0(machine_disable_irq_obj, machine_disable_irq);
    
    STATIC mp_obj_t machine_enable_irq(mp_obj_t state_in) {
        uint32_t state = mp_obj_get_int(state_in);
        ets_loop_iter_disable = (state >> ETS_LOOP_ITER_BIT) & 1;
        enable_irq(state & ~(1 << ETS_LOOP_ITER_BIT));
        return mp_const_none;
    }
    MP_DEFINE_CONST_FUN_OBJ_1(machine_enable_irq_obj, machine_enable_irq);
    
    STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
        { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_umachine) },
        { MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
        { MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
        { MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },
    
        { MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&machine_freq_obj) },
        { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&machine_reset_obj) },
        { MP_ROM_QSTR(MP_QSTR_reset_cause), MP_ROM_PTR(&machine_reset_cause_obj) },
        { MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) },
        { MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
        { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&machine_sleep_obj) },
        { MP_ROM_QSTR(MP_QSTR_deepsleep), MP_ROM_PTR(&machine_deepsleep_obj) },
    
        { MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },
        { MP_ROM_QSTR(MP_QSTR_enable_irq), MP_ROM_PTR(&machine_enable_irq_obj) },
    
        { MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
    
        { MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&pyb_rtc_type) },
        { MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&esp_timer_type) },
        { MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&esp_wdt_type) },
        { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&pyb_pin_type) },
        { MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&pyb_pwm_type) },
        { MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&pyb_adc_type) },
        { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&pyb_uart_type) },
        { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_i2c_type) },
        { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&pyb_hspi_type) },
    
        // wake abilities
        { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) },
    
        // reset causes
        { MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(REASON_DEFAULT_RST) },
        { MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(REASON_EXT_SYS_RST) },
        { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(REASON_DEEP_SLEEP_AWAKE) },
        { MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(REASON_WDT_RST) },
        { MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(REASON_SOFT_RESTART) },
    };
    
    STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
    
    const mp_obj_module_t mp_module_machine = {
        .base = { &mp_type_module },
        .globals = (mp_obj_dict_t*)&machine_module_globals,
    };
    
    #endif // MICROPY_PY_MACHINE