2019-09-23 04:50:58 +01:00
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 "Matt Trentini" <matt.trentini@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "modmachine.h"
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#include "mphalport.h"
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2021-11-11 12:36:27 +00:00
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#include "modesp32.h"
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2022-01-13 04:16:16 +00:00
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#include "esp_task.h"
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#include "driver/rmt.h"
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2019-09-23 04:50:58 +01:00
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// This exposes the ESP32's RMT module to MicroPython. RMT is provided by the Espressif ESP-IDF:
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//
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// https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/rmt.html
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//
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// With some examples provided:
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//
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// https://github.com/espressif/arduino-esp32/tree/master/libraries/ESP32/examples/RMT
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//
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// RMT allows accurate (down to 12.5ns resolution) transmit - and receive - of pulse signals.
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// Originally designed to generate infrared remote control signals, the module is very
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// flexible and quite easy-to-use.
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//
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// This current MicroPython implementation lacks some major features, notably receive pulses
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// and carrier output.
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2022-02-01 05:58:56 +00:00
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// Last available RMT channel that can transmit.
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#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4, 4, 0)
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#define RMT_LAST_TX_CHANNEL (RMT_CHANNEL_MAX - 1)
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#else
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#define RMT_LAST_TX_CHANNEL (SOC_RMT_TX_CANDIDATES_PER_GROUP - 1)
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#endif
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2019-09-23 04:50:58 +01:00
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// Forward declaration
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extern const mp_obj_type_t esp32_rmt_type;
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typedef struct _esp32_rmt_obj_t {
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mp_obj_base_t base;
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uint8_t channel_id;
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gpio_num_t pin;
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uint8_t clock_div;
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mp_uint_t num_items;
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rmt_item32_t *items;
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2020-06-26 14:55:07 +01:00
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bool loop_en;
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2019-09-23 04:50:58 +01:00
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} esp32_rmt_obj_t;
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2022-01-21 13:02:27 +00:00
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// Current channel used for machine.bitstream, in the machine_bitstream_high_low_rmt
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// implementation. A value of -1 means do not use RMT.
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2022-02-01 05:58:56 +00:00
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int8_t esp32_rmt_bitstream_channel_id = RMT_LAST_TX_CHANNEL;
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2022-01-21 13:02:27 +00:00
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#if MP_TASK_COREID == 0
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2022-01-13 04:16:16 +00:00
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typedef struct _rmt_install_state_t {
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SemaphoreHandle_t handle;
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uint8_t channel_id;
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esp_err_t ret;
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} rmt_install_state_t;
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STATIC void rmt_install_task(void *pvParameter) {
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rmt_install_state_t *state = pvParameter;
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state->ret = rmt_driver_install(state->channel_id, 0, 0);
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xSemaphoreGive(state->handle);
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vTaskDelete(NULL);
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for (;;) {
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}
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}
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// Call rmt_driver_install on core 1. This ensures that the RMT interrupt handler is
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// serviced on core 1, so that WiFi (if active) does not interrupt it and cause glitches.
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esp_err_t rmt_driver_install_core1(uint8_t channel_id) {
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TaskHandle_t th;
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rmt_install_state_t state;
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state.handle = xSemaphoreCreateBinary();
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state.channel_id = channel_id;
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xTaskCreatePinnedToCore(rmt_install_task, "rmt_install_task", 2048 / sizeof(StackType_t), &state, ESP_TASK_PRIO_MIN + 1, &th, 1);
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xSemaphoreTake(state.handle, portMAX_DELAY);
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vSemaphoreDelete(state.handle);
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return state.ret;
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}
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2022-01-21 13:02:27 +00:00
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#else
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// MicroPython runs on core 1, so we can call the RMT installer directly and its
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// interrupt handler will also run on core 1.
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esp_err_t rmt_driver_install_core1(uint8_t channel_id) {
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return rmt_driver_install(channel_id, 0, 0);
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}
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#endif
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2019-09-23 04:50:58 +01:00
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STATIC mp_obj_t esp32_rmt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = -1} },
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{ MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_clock_div, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} }, // 100ns resolution
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2021-06-30 19:00:50 +01:00
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{ MP_QSTR_idle_level, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} }, // low voltage
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{ MP_QSTR_tx_carrier, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} }, // no carrier
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2019-09-23 04:50:58 +01:00
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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mp_uint_t channel_id = args[0].u_int;
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gpio_num_t pin_id = machine_pin_get_id(args[1].u_obj);
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mp_uint_t clock_div = args[2].u_int;
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2021-06-30 19:00:50 +01:00
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mp_uint_t idle_level = args[3].u_bool;
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mp_obj_t tx_carrier_obj = args[4].u_obj;
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2020-06-08 07:29:43 +01:00
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2022-01-11 06:21:14 +00:00
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if (esp32_rmt_bitstream_channel_id >= 0 && channel_id == esp32_rmt_bitstream_channel_id) {
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mp_raise_ValueError(MP_ERROR_TEXT("channel used by bitstream"));
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2021-11-11 12:36:27 +00:00
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}
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2019-09-23 04:50:58 +01:00
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if (clock_div < 1 || clock_div > 255) {
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2020-03-02 11:35:22 +00:00
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mp_raise_ValueError(MP_ERROR_TEXT("clock_div must be between 1 and 255"));
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2019-09-23 04:50:58 +01:00
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}
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esp32_rmt_obj_t *self = m_new_obj_with_finaliser(esp32_rmt_obj_t);
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self->base.type = &esp32_rmt_type;
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self->channel_id = channel_id;
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self->pin = pin_id;
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self->clock_div = clock_div;
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2020-06-26 14:55:07 +01:00
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self->loop_en = false;
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2019-09-23 04:50:58 +01:00
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2021-05-04 18:50:20 +01:00
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rmt_config_t config = {0};
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2019-09-23 04:50:58 +01:00
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config.rmt_mode = RMT_MODE_TX;
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config.channel = (rmt_channel_t)self->channel_id;
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config.gpio_num = self->pin;
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config.mem_block_num = 1;
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config.tx_config.loop_en = 0;
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2021-06-30 19:00:50 +01:00
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if (tx_carrier_obj != mp_const_none) {
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mp_obj_t *tx_carrier_details = NULL;
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mp_obj_get_array_fixed_n(tx_carrier_obj, 3, &tx_carrier_details);
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mp_uint_t frequency = mp_obj_get_int(tx_carrier_details[0]);
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mp_uint_t duty = mp_obj_get_int(tx_carrier_details[1]);
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mp_uint_t level = mp_obj_is_true(tx_carrier_details[2]);
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if (frequency == 0) {
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mp_raise_ValueError(MP_ERROR_TEXT("tx_carrier frequency must be >0"));
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}
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if (duty > 100) {
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mp_raise_ValueError(MP_ERROR_TEXT("tx_carrier duty must be 0..100"));
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}
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config.tx_config.carrier_en = 1;
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config.tx_config.carrier_freq_hz = frequency;
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config.tx_config.carrier_duty_percent = duty;
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config.tx_config.carrier_level = level;
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} else {
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config.tx_config.carrier_en = 0;
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}
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2019-09-23 04:50:58 +01:00
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config.tx_config.idle_output_en = 1;
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2021-06-30 19:00:50 +01:00
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config.tx_config.idle_level = idle_level;
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2019-09-23 04:50:58 +01:00
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config.clk_div = self->clock_div;
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2020-06-18 12:44:54 +01:00
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check_esp_err(rmt_config(&config));
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2022-01-13 04:16:16 +00:00
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check_esp_err(rmt_driver_install_core1(config.channel));
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2019-09-23 04:50:58 +01:00
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return MP_OBJ_FROM_PTR(self);
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}
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STATIC void esp32_rmt_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->pin != -1) {
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2021-06-30 19:00:50 +01:00
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bool idle_output_en;
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rmt_idle_level_t idle_level;
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check_esp_err(rmt_get_idle_level(self->channel_id, &idle_output_en, &idle_level));
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mp_printf(print, "RMT(channel=%u, pin=%u, source_freq=%u, clock_div=%u, idle_level=%u)",
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self->channel_id, self->pin, APB_CLK_FREQ, self->clock_div, idle_level);
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2019-09-23 04:50:58 +01:00
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} else {
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mp_printf(print, "RMT()");
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}
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}
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STATIC mp_obj_t esp32_rmt_deinit(mp_obj_t self_in) {
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// fixme: check for valid channel. Return exception if error occurs.
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(self_in);
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if (self->pin != -1) { // Check if channel has already been deinitialised.
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rmt_driver_uninstall(self->channel_id);
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self->pin = -1; // -1 to indicate RMT is unused
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m_free(self->items);
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp32_rmt_deinit_obj, esp32_rmt_deinit);
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// Return the source frequency.
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// Currently only the APB clock (80MHz) can be used but it is possible other
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// clock sources will added in the future.
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STATIC mp_obj_t esp32_rmt_source_freq(mp_obj_t self_in) {
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return mp_obj_new_int(APB_CLK_FREQ);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp32_rmt_source_freq_obj, esp32_rmt_source_freq);
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// Return the clock divider.
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STATIC mp_obj_t esp32_rmt_clock_div(mp_obj_t self_in) {
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(self_in);
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return mp_obj_new_int(self->clock_div);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(esp32_rmt_clock_div_obj, esp32_rmt_clock_div);
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// Query whether the channel has finished sending pulses. Takes an optional
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2021-06-30 19:00:50 +01:00
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// timeout (in milliseconds), returning true if the pulse stream has
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2019-09-23 04:50:58 +01:00
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// completed or false if they are still transmitting (or timeout is reached).
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STATIC mp_obj_t esp32_rmt_wait_done(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_self, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(args[0].u_obj);
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2021-06-30 19:00:50 +01:00
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esp_err_t err = rmt_wait_tx_done(self->channel_id, args[1].u_int / portTICK_PERIOD_MS);
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2019-09-23 04:50:58 +01:00
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return err == ESP_OK ? mp_const_true : mp_const_false;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(esp32_rmt_wait_done_obj, 1, esp32_rmt_wait_done);
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STATIC mp_obj_t esp32_rmt_loop(mp_obj_t self_in, mp_obj_t loop) {
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(self_in);
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2020-06-26 14:55:07 +01:00
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self->loop_en = mp_obj_get_int(loop);
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if (!self->loop_en) {
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bool loop_en;
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check_esp_err(rmt_get_tx_loop_mode(self->channel_id, &loop_en));
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if (loop_en) {
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check_esp_err(rmt_set_tx_loop_mode(self->channel_id, false));
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check_esp_err(rmt_set_tx_intr_en(self->channel_id, true));
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}
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}
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2019-09-23 04:50:58 +01:00
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(esp32_rmt_loop_obj, esp32_rmt_loop);
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2021-06-30 19:00:50 +01:00
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STATIC mp_obj_t esp32_rmt_write_pulses(size_t n_args, const mp_obj_t *args) {
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esp32_rmt_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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mp_obj_t duration_obj = args[1];
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mp_obj_t data_obj = n_args > 2 ? args[2] : mp_const_true;
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mp_uint_t duration = 0;
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size_t duration_length = 0;
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mp_obj_t *duration_ptr = NULL;
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mp_uint_t data = 0;
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size_t data_length = 0;
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mp_obj_t *data_ptr = NULL;
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mp_uint_t num_pulses = 0;
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if (!(mp_obj_is_type(data_obj, &mp_type_tuple) || mp_obj_is_type(data_obj, &mp_type_list))) {
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// Mode 1: array of durations, toggle initial data value
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mp_obj_get_array(duration_obj, &duration_length, &duration_ptr);
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data = mp_obj_is_true(data_obj);
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num_pulses = duration_length;
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} else if (mp_obj_is_int(duration_obj)) {
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// Mode 2: constant duration, array of data values
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duration = mp_obj_get_int(duration_obj);
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mp_obj_get_array(data_obj, &data_length, &data_ptr);
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|
|
|
num_pulses = data_length;
|
|
|
|
} else {
|
|
|
|
// Mode 3: arrays of durations and data values
|
|
|
|
mp_obj_get_array(duration_obj, &duration_length, &duration_ptr);
|
|
|
|
mp_obj_get_array(data_obj, &data_length, &data_ptr);
|
|
|
|
if (duration_length != data_length) {
|
|
|
|
mp_raise_ValueError(MP_ERROR_TEXT("duration and data must have same length"));
|
|
|
|
}
|
|
|
|
num_pulses = duration_length;
|
2019-09-23 04:50:58 +01:00
|
|
|
}
|
|
|
|
|
2021-06-30 19:00:50 +01:00
|
|
|
if (num_pulses == 0) {
|
|
|
|
mp_raise_ValueError(MP_ERROR_TEXT("No pulses"));
|
|
|
|
}
|
|
|
|
if (self->loop_en && num_pulses > 126) {
|
|
|
|
mp_raise_ValueError(MP_ERROR_TEXT("Too many pulses for loop"));
|
2021-06-24 15:34:16 +01:00
|
|
|
}
|
|
|
|
|
2021-06-30 19:00:50 +01:00
|
|
|
mp_uint_t num_items = (num_pulses / 2) + (num_pulses % 2);
|
2019-09-23 04:50:58 +01:00
|
|
|
if (num_items > self->num_items) {
|
|
|
|
self->items = (rmt_item32_t *)m_realloc(self->items, num_items * sizeof(rmt_item32_t *));
|
|
|
|
self->num_items = num_items;
|
|
|
|
}
|
|
|
|
|
2021-06-30 19:00:50 +01:00
|
|
|
for (mp_uint_t item_index = 0, pulse_index = 0; item_index < num_items; item_index++) {
|
|
|
|
self->items[item_index].duration0 = duration_length ? mp_obj_get_int(duration_ptr[pulse_index]) : duration;
|
|
|
|
self->items[item_index].level0 = data_length ? mp_obj_is_true(data_ptr[pulse_index]) : data++;
|
|
|
|
pulse_index++;
|
|
|
|
if (pulse_index < num_pulses) {
|
|
|
|
self->items[item_index].duration1 = duration_length ? mp_obj_get_int(duration_ptr[pulse_index]) : duration;
|
|
|
|
self->items[item_index].level1 = data_length ? mp_obj_is_true(data_ptr[pulse_index]) : data++;
|
|
|
|
pulse_index++;
|
|
|
|
} else {
|
|
|
|
self->items[item_index].duration1 = 0;
|
|
|
|
self->items[item_index].level1 = 0;
|
2019-09-23 04:50:58 +01:00
|
|
|
}
|
|
|
|
}
|
2020-06-26 14:55:07 +01:00
|
|
|
|
|
|
|
if (self->loop_en) {
|
|
|
|
bool loop_en;
|
|
|
|
check_esp_err(rmt_get_tx_loop_mode(self->channel_id, &loop_en));
|
|
|
|
if (loop_en) {
|
|
|
|
check_esp_err(rmt_set_tx_intr_en(self->channel_id, true));
|
|
|
|
check_esp_err(rmt_set_tx_loop_mode(self->channel_id, false));
|
|
|
|
}
|
|
|
|
check_esp_err(rmt_wait_tx_done(self->channel_id, portMAX_DELAY));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (self->loop_en) {
|
2021-06-24 15:34:16 +01:00
|
|
|
check_esp_err(rmt_set_tx_intr_en(self->channel_id, false));
|
2020-06-26 14:55:07 +01:00
|
|
|
check_esp_err(rmt_set_tx_loop_mode(self->channel_id, true));
|
|
|
|
}
|
|
|
|
|
2023-04-13 14:28:48 +01:00
|
|
|
check_esp_err(rmt_write_items(self->channel_id, self->items, num_items, false));
|
|
|
|
|
2019-09-23 04:50:58 +01:00
|
|
|
return mp_const_none;
|
|
|
|
}
|
2021-06-30 19:00:50 +01:00
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(esp32_rmt_write_pulses_obj, 2, 3, esp32_rmt_write_pulses);
|
2019-09-23 04:50:58 +01:00
|
|
|
|
2022-01-11 06:21:14 +00:00
|
|
|
STATIC mp_obj_t esp32_rmt_bitstream_channel(size_t n_args, const mp_obj_t *args) {
|
|
|
|
if (n_args > 0) {
|
|
|
|
if (args[0] == mp_const_none) {
|
|
|
|
esp32_rmt_bitstream_channel_id = -1;
|
|
|
|
} else {
|
|
|
|
mp_int_t channel_id = mp_obj_get_int(args[0]);
|
2022-02-01 05:58:56 +00:00
|
|
|
if (channel_id < 0 || channel_id > RMT_LAST_TX_CHANNEL) {
|
2022-01-11 06:21:14 +00:00
|
|
|
mp_raise_ValueError(MP_ERROR_TEXT("invalid channel"));
|
|
|
|
}
|
|
|
|
esp32_rmt_bitstream_channel_id = channel_id;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (esp32_rmt_bitstream_channel_id < 0) {
|
|
|
|
return mp_const_none;
|
|
|
|
} else {
|
|
|
|
return MP_OBJ_NEW_SMALL_INT(esp32_rmt_bitstream_channel_id);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(esp32_rmt_bitstream_channel_fun_obj, 0, 1, esp32_rmt_bitstream_channel);
|
|
|
|
STATIC MP_DEFINE_CONST_STATICMETHOD_OBJ(esp32_rmt_bitstream_channel_obj, MP_ROM_PTR(&esp32_rmt_bitstream_channel_fun_obj));
|
|
|
|
|
2019-09-23 04:50:58 +01:00
|
|
|
STATIC const mp_rom_map_elem_t esp32_rmt_locals_dict_table[] = {
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&esp32_rmt_deinit_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&esp32_rmt_deinit_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_source_freq), MP_ROM_PTR(&esp32_rmt_source_freq_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_clock_div), MP_ROM_PTR(&esp32_rmt_clock_div_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_wait_done), MP_ROM_PTR(&esp32_rmt_wait_done_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_loop), MP_ROM_PTR(&esp32_rmt_loop_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_write_pulses), MP_ROM_PTR(&esp32_rmt_write_pulses_obj) },
|
2022-01-11 06:21:14 +00:00
|
|
|
|
|
|
|
// Static methods
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_bitstream_channel), MP_ROM_PTR(&esp32_rmt_bitstream_channel_obj) },
|
2019-09-23 04:50:58 +01:00
|
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(esp32_rmt_locals_dict, esp32_rmt_locals_dict_table);
|
|
|
|
|
2021-07-14 05:38:38 +01:00
|
|
|
MP_DEFINE_CONST_OBJ_TYPE(
|
|
|
|
esp32_rmt_type,
|
|
|
|
MP_QSTR_RMT,
|
|
|
|
MP_TYPE_FLAG_NONE,
|
2022-09-16 15:31:23 +01:00
|
|
|
make_new, esp32_rmt_make_new,
|
2021-07-14 05:38:38 +01:00
|
|
|
print, esp32_rmt_print,
|
2022-06-24 07:27:46 +01:00
|
|
|
locals_dict, &esp32_rmt_locals_dict
|
2021-07-14 05:38:38 +01:00
|
|
|
);
|