625 lines
27 KiB
C
625 lines
27 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <esp_types.h>
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#include "esp_intr.h"
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#include "esp_intr_alloc.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "freertos/xtensa_api.h"
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#include "soc/gpio_sig_map.h"
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#include "driver/ledc.h"
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#include "soc/ledc_reg.h"
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#include "soc/ledc_struct.h"
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#include "esp_log.h"
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static const char* LEDC_TAG = "ledc";
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static portMUX_TYPE ledc_spinlock = portMUX_INITIALIZER_UNLOCKED;
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#define LEDC_CHECK(a, str, ret_val) \
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if (!(a)) { \
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ESP_LOGE(LEDC_TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str); \
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return (ret_val); \
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}
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typedef struct {
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uint16_t speed_mode;
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uint16_t direction;
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int target_duty;
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int cycle_num;
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int scale;
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ledc_fade_mode_t mode;
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xSemaphoreHandle ledc_fade_sem;
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xSemaphoreHandle ledc_fade_mux;
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} ledc_fade_t;
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static ledc_fade_t *s_ledc_fade_rec[LEDC_SPEED_MODE_MAX][LEDC_CHANNEL_MAX];
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static ledc_isr_handle_t s_ledc_fade_isr_handle = NULL;
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#define LEDC_VAL_NO_CHANGE (-1)
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#define LEDC_STEP_NUM_MAX (1023)
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#define LEDC_DUTY_DECIMAL_BIT_NUM (4)
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#define LEDC_MODE_ERR_STR "LEDC mode error"
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#define LEDC_TIMER_ERR_STR "LEDC timer error"
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#define LEDC_CHANNEL_ERR_STR "LEDC channel error"
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#define LEDC_GPIO_OUT_ERR_STR "LEDC GPIO output number error"
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#define LEDC_FADE_DIR_ERR_STR "LEDC fade direction error"
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#define LEDC_FADE_SERVICE_ERR_STR "LEDC fade service not installed"
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#define LEDC_FADE_TARGET_ERR_STR "LEDC fade target duty error"
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#define LEDC_FADE_INSTALLED_ERR_STR "LEDC fade service already installed"
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#define LEDC_FADE_MODE_ERR_STR "LEDC fade mode error"
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#define LEDC_FADE_INIT_ERROR_STR "LEDC fade channel init error"
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static void ledc_ls_timer_update(ledc_mode_t speed_mode, ledc_timer_t timer_sel)
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{
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if (speed_mode == LEDC_LOW_SPEED_MODE) {
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.low_speed_update = 1;
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}
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}
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static IRAM_ATTR void ledc_ls_channel_update(ledc_mode_t speed_mode, ledc_channel_t channel_num)
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{
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if (speed_mode == LEDC_LOW_SPEED_MODE) {
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LEDC.channel_group[speed_mode].channel[channel_num].conf0.low_speed_update = 1;
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}
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}
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esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_t div_num, uint32_t bit_num,
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ledc_clk_src_t clk_src)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.div_num = div_num;
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.tick_sel = clk_src;
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num = bit_num;
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ledc_ls_timer_update(speed_mode, timer_sel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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static IRAM_ATTR esp_err_t ledc_duty_config(ledc_mode_t speed_mode, ledc_channel_t channel_num, int hpoint_val, uint32_t duty_val,
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uint32_t duty_direction, uint32_t duty_num, uint32_t duty_cycle, uint32_t duty_scale)
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{
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portENTER_CRITICAL(&ledc_spinlock);
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if (hpoint_val >= 0) {
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LEDC.channel_group[speed_mode].channel[channel_num].hpoint.hpoint = hpoint_val;
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}
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LEDC.channel_group[speed_mode].channel[channel_num].duty.duty = duty_val;
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LEDC.channel_group[speed_mode].channel[channel_num].conf1.val = ((duty_direction & LEDC_DUTY_INC_HSCH0_V) << LEDC_DUTY_INC_HSCH0_S) |
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((duty_num & LEDC_DUTY_NUM_HSCH0_V) << LEDC_DUTY_NUM_HSCH0_S) |
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((duty_cycle & LEDC_DUTY_CYCLE_HSCH0_V) << LEDC_DUTY_CYCLE_HSCH0_S) |
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((duty_scale & LEDC_DUTY_SCALE_HSCH0_V) << LEDC_DUTY_SCALE_HSCH0_S);
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ledc_ls_channel_update(speed_mode, channel_num);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t timer_idx)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_idx <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel = timer_idx;
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ledc_ls_channel_update(speed_mode, channel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.rst = 1;
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.rst = 0;
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ledc_ls_timer_update(speed_mode, timer_sel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 1;
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ledc_ls_timer_update(speed_mode, timer_sel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 0;
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ledc_ls_timer_update(speed_mode, timer_sel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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static esp_err_t ledc_enable_intr_type(ledc_mode_t speed_mode, uint32_t channel, ledc_intr_type_t type)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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uint32_t value;
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uint32_t intr_type = type;
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portENTER_CRITICAL(&ledc_spinlock);
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value = LEDC.int_ena.val;
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uint8_t int_en_base = LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S;
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if (speed_mode == LEDC_LOW_SPEED_MODE) {
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int_en_base = LEDC_DUTY_CHNG_END_LSCH0_INT_ENA_S;
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}
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if (intr_type == LEDC_INTR_FADE_END) {
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LEDC.int_ena.val = value | BIT(int_en_base + channel);
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} else {
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LEDC.int_ena.val = (value & (~(BIT(int_en_base + channel))));
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}
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_isr_register(void (*fn)(void*), void * arg, int intr_alloc_flags, ledc_isr_handle_t *handle)
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{
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esp_err_t ret;
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LEDC_CHECK(fn, "ledc isr null", ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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ret = esp_intr_alloc(ETS_LEDC_INTR_SOURCE, intr_alloc_flags, fn, arg, handle);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ret;
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}
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esp_err_t ledc_timer_config(const ledc_timer_config_t* timer_conf)
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{
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int freq_hz = timer_conf->freq_hz;
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int bit_num = timer_conf->bit_num;
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int timer_num = timer_conf->timer_num;
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int speed_mode = timer_conf->speed_mode;
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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periph_module_enable(PERIPH_LEDC_MODULE);
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if (freq_hz == 0 || bit_num == 0 || bit_num > LEDC_TIMER_15_BIT) {
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ESP_LOGE(LEDC_TAG, "freq_hz=%u bit_num=%u", freq_hz, bit_num);
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return ESP_ERR_INVALID_ARG;
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}
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if (timer_num > LEDC_TIMER_3) {
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ESP_LOGE(LEDC_TAG, "invalid timer #%u", timer_num);
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return ESP_ERR_INVALID_ARG;
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}
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esp_err_t ret = ESP_OK;
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uint32_t precision = ( 0x1 << bit_num ); // 2**depth
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// Try calculating divisor based on LEDC_APB_CLK
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ledc_clk_src_t timer_clk_src = LEDC_APB_CLK;
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// div_param is a Q10.8 fixed point value
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uint64_t div_param = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / freq_hz / precision;
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if (div_param < 256) {
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// divisor is too low
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ESP_LOGE(LEDC_TAG, "requested frequency and bit depth can not be achieved, try reducing freq_hz or bit_num. div_param=%d",
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(uint32_t ) div_param);
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ret = ESP_FAIL;
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}
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if (div_param > LEDC_DIV_NUM_HSTIMER0_V) {
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// APB_CLK results in divisor which too high. Try using REF_TICK as clock source.
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timer_clk_src = LEDC_REF_TICK;
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div_param = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
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if (div_param < 256 || div_param > LEDC_DIV_NUM_HSTIMER0_V) {
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ESP_LOGE(LEDC_TAG, "requested frequency and bit depth can not be achieved, try increasing freq_hz or bit_num. div_param=%d",
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(uint32_t ) div_param);
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ret = ESP_FAIL;
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}
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} else {
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if (speed_mode == LEDC_LOW_SPEED_MODE) {
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//for now, we only select 80mhz for slow clk of LEDC low speed channels.
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LEDC.conf.slow_clk_sel = 1;
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}
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}
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// set timer parameters
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ledc_timer_set(speed_mode, timer_num, div_param, bit_num, timer_clk_src);
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// reset timer
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ledc_timer_rst(speed_mode, timer_num);
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return ret;
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}
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esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc_channel)
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{
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LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), LEDC_GPIO_OUT_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
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gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
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if (speed_mode == LEDC_HIGH_SPEED_MODE) {
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gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
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} else {
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gpio_matrix_out(gpio_num, LEDC_LS_SIG_OUT0_IDX + ledc_channel, 0, 0);
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}
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return ESP_OK;
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}
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esp_err_t ledc_channel_config(const ledc_channel_config_t* ledc_conf)
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{
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uint32_t speed_mode = ledc_conf->speed_mode;
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uint32_t gpio_num = ledc_conf->gpio_num;
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uint32_t ledc_channel = ledc_conf->channel;
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uint32_t timer_select = ledc_conf->timer_sel;
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uint32_t intr_type = ledc_conf->intr_type;
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uint32_t duty = ledc_conf->duty;
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LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), LEDC_GPIO_OUT_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(timer_select <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
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periph_module_enable(PERIPH_LEDC_MODULE);
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esp_err_t ret = ESP_OK;
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/*set channel parameters*/
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/* channel parameters decide how the waveform looks like in one period*/
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/* set channel duty, duty range is (0 ~ ((2 ** bit_num) - 1))*/
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ledc_set_duty(speed_mode, ledc_channel, duty);
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/*update duty settings*/
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ledc_update_duty(speed_mode, ledc_channel);
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/*bind the channel with the timer*/
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ledc_bind_channel_timer(speed_mode, ledc_channel, timer_select);
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/*set interrupt type*/
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ledc_enable_intr_type(speed_mode, ledc_channel, intr_type);
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ESP_LOGD(LEDC_TAG, "LEDC_PWM CHANNEL %1u|GPIO %02u|Duty %04u|Time %01u",
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ledc_channel, gpio_num, duty, timer_select
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);
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/*set LEDC signal in gpio matrix*/
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
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gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
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if (speed_mode == LEDC_HIGH_SPEED_MODE) {
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gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
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} else {
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gpio_matrix_out(gpio_num, LEDC_LS_SIG_OUT0_IDX + ledc_channel, 0, 0);
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}
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return ret;
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}
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esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.channel_group[speed_mode].channel[channel].conf0.sig_out_en = 1;
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LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 1;
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ledc_ls_channel_update(speed_mode, channel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.channel_group[speed_mode].channel[channel].conf0.idle_lv = idle_level & 0x1;
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LEDC.channel_group[speed_mode].channel[channel].conf0.sig_out_en = 0;
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LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 0;
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ledc_ls_channel_update(speed_mode, channel);
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portEXIT_CRITICAL(&ledc_spinlock);
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return ESP_OK;
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}
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esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, ledc_duty_direction_t fade_direction,
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uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(fade_direction <= LEDC_DUTY_DIR_INCREASE, LEDC_FADE_DIR_ERR_STR, ESP_ERR_INVALID_ARG);
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if (step_num > LEDC_DUTY_NUM_HSCH0_V || duty_cyle_num > LEDC_DUTY_CYCLE_HSCH0_V || duty_scale > LEDC_DUTY_SCALE_HSCH0_V) {
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ESP_LOGE(LEDC_TAG, "step_num=%u duty_cyle_num=%u duty_scale=%u", step_num, duty_cyle_num, duty_scale);
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return ESP_ERR_INVALID_ARG;
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}
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if (s_ledc_fade_rec[speed_mode][channel]) {
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ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
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}
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ledc_duty_config(speed_mode,
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channel, //uint32_t chan_num,
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0, //uint32_t hpoint_val,
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duty << 4, //uint32_t duty_val,the least 4 bits are decimal part
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fade_direction, //uint32_t increase,
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step_num, //uint32_t duty_num,
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duty_cyle_num, //uint32_t duty_cycle,
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duty_scale //uint32_t duty_scale
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);
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return ESP_OK;
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}
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esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty)
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{
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LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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LEDC_CHECK(channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
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if (s_ledc_fade_rec[speed_mode][channel]) {
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ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
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}
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ledc_duty_config(speed_mode,
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channel, //uint32_t chan_num,
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0, //uint32_t hpoint_val,
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duty << 4, //uint32_t duty_val,the least 4 bits are decimal part
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1, //uint32_t increase,
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1, //uint32_t duty_num,
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1, //uint32_t duty_cycle,
|
|
0 //uint32_t duty_scale
|
|
);
|
|
return ESP_OK;
|
|
}
|
|
|
|
int ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, (-1));
|
|
uint32_t duty = (LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> 4);
|
|
return duty;
|
|
}
|
|
|
|
esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
portENTER_CRITICAL(&ledc_spinlock);
|
|
esp_err_t ret = ESP_OK;
|
|
uint32_t div_num = 0;
|
|
uint32_t bit_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.bit_num;
|
|
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
|
|
uint32_t precision = (0x1 << bit_num);
|
|
if (timer_source_clk == LEDC_APB_CLK) {
|
|
div_num = ((uint64_t) LEDC_APB_CLK_HZ << 8) / freq_hz / precision;
|
|
} else {
|
|
div_num = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
|
|
}
|
|
if (div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) {
|
|
ESP_LOGE(LEDC_TAG, "div param err,div_param=%u", div_num);
|
|
ret = ESP_FAIL;
|
|
}
|
|
LEDC.timer_group[speed_mode].timer[timer_num].conf.div_num = div_num;
|
|
portEXIT_CRITICAL(&ledc_spinlock);
|
|
return ret;
|
|
}
|
|
|
|
uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, (0));
|
|
portENTER_CRITICAL(&ledc_spinlock);
|
|
uint32_t freq = 0;
|
|
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
|
|
uint32_t bit_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.bit_num;
|
|
uint32_t div_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.div_num;
|
|
uint32_t precision = (0x1 << bit_num);
|
|
if (timer_source_clk == LEDC_APB_CLK) {
|
|
freq = ((uint64_t) LEDC_APB_CLK_HZ << 8) / precision / div_num;
|
|
} else {
|
|
freq = ((uint64_t) LEDC_REF_CLK_HZ << 8) / precision / div_num;
|
|
}
|
|
portEXIT_CRITICAL(&ledc_spinlock);
|
|
return freq;
|
|
}
|
|
|
|
void IRAM_ATTR ledc_fade_isr(void* arg)
|
|
{
|
|
int channel;
|
|
portBASE_TYPE HPTaskAwoken = pdFALSE;
|
|
uint32_t intr_status = LEDC.int_st.val; //read LEDC interrupt status.
|
|
LEDC.int_clr.val = intr_status; //clear LEDC interrupt status.
|
|
int speed_mode = LEDC_HIGH_SPEED_MODE;
|
|
for (channel = 0; channel < LEDC_CHANNEL_MAX; channel++) {
|
|
if (intr_status & (BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ST_S + channel) | BIT(LEDC_DUTY_CHNG_END_LSCH0_INT_ST_S + channel))) {
|
|
if (intr_status & BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ST_S + channel)) {
|
|
speed_mode = LEDC_HIGH_SPEED_MODE;
|
|
} else {
|
|
speed_mode = LEDC_LOW_SPEED_MODE;
|
|
}
|
|
if (s_ledc_fade_rec[speed_mode][channel] == NULL) {
|
|
//fade object not initialized yet.
|
|
continue;
|
|
}
|
|
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
|
|
if (duty_cur == s_ledc_fade_rec[speed_mode][channel]->target_duty) {
|
|
if (s_ledc_fade_rec[speed_mode][channel]->mode == LEDC_FADE_WAIT_DONE) {
|
|
xSemaphoreGiveFromISR(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, &HPTaskAwoken);
|
|
if (HPTaskAwoken == pdTRUE) {
|
|
portYIELD_FROM_ISR();
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
int duty_tar = s_ledc_fade_rec[speed_mode][channel]->target_duty;
|
|
int scale = s_ledc_fade_rec[speed_mode][channel]->scale;
|
|
if (scale == 0) {
|
|
continue;
|
|
}
|
|
int cycle = s_ledc_fade_rec[speed_mode][channel]->cycle_num;
|
|
int delta = s_ledc_fade_rec[speed_mode][channel]->direction == LEDC_DUTY_DIR_DECREASE ? duty_cur - duty_tar : duty_tar - duty_cur;
|
|
int step = delta / scale > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : delta / scale;
|
|
if (delta > scale) {
|
|
ledc_duty_config(
|
|
speed_mode,
|
|
channel,
|
|
LEDC_VAL_NO_CHANGE,
|
|
duty_cur << LEDC_DUTY_DECIMAL_BIT_NUM,
|
|
s_ledc_fade_rec[speed_mode][channel]->direction,
|
|
step,
|
|
cycle,
|
|
scale);
|
|
} else {
|
|
ledc_duty_config(
|
|
speed_mode,
|
|
channel,
|
|
LEDC_VAL_NO_CHANGE,
|
|
duty_tar << LEDC_DUTY_DECIMAL_BIT_NUM,
|
|
s_ledc_fade_rec[speed_mode][channel]->direction,
|
|
1,
|
|
1,
|
|
0);
|
|
}
|
|
LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 1;
|
|
}
|
|
}
|
|
LEDC.int_clr.val = intr_status; //clear LEDC interrupt status.
|
|
}
|
|
|
|
static esp_err_t ledc_fade_channel_deinit(ledc_mode_t speed_mode, ledc_channel_t channel)
|
|
{
|
|
if (s_ledc_fade_rec[speed_mode][channel]) {
|
|
if (s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux) {
|
|
vSemaphoreDelete(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux);
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux = NULL;
|
|
}
|
|
if (s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem) {
|
|
vSemaphoreDelete(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem);
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem = NULL;
|
|
}
|
|
free(s_ledc_fade_rec[speed_mode][channel]);
|
|
s_ledc_fade_rec[speed_mode][channel] = NULL;
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t ledc_fade_channel_init_check(ledc_mode_t speed_mode, ledc_channel_t channel)
|
|
{
|
|
if (s_ledc_fade_rec[speed_mode][channel] == NULL) {
|
|
s_ledc_fade_rec[speed_mode][channel] = (ledc_fade_t *) calloc(1, sizeof(ledc_fade_t));
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux = xSemaphoreCreateMutex();
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem = xSemaphoreCreateBinary();
|
|
}
|
|
if (s_ledc_fade_rec[speed_mode][channel]
|
|
&& s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux
|
|
&& s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem) {
|
|
return ESP_OK;
|
|
} else {
|
|
ledc_fade_channel_deinit(speed_mode, channel);
|
|
return ESP_FAIL;
|
|
}
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int max_fade_time_ms)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
LEDC_CHECK(channel < LEDC_CHANNEL_MAX, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
|
|
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
|
|
int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num)) - 1;
|
|
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
uint32_t freq = ledc_get_freq(speed_mode, timer_sel);
|
|
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
|
|
int duty_delta = target_duty > duty_cur ? target_duty - duty_cur : duty_cur - target_duty;
|
|
|
|
if (duty_delta == 0) {
|
|
return ESP_OK;
|
|
}
|
|
int total_cycles = max_fade_time_ms * freq / 1000;
|
|
int scale, cycle_num;
|
|
if (total_cycles > duty_delta) {
|
|
scale = 1;
|
|
cycle_num = total_cycles / duty_delta;
|
|
} else {
|
|
cycle_num = 1;
|
|
scale = (duty_delta + total_cycles - 1) / total_cycles;
|
|
}
|
|
return ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int scale, int cycle_num)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
LEDC_CHECK(channel < LEDC_CHANNEL_MAX, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
|
|
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
|
|
int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num)) - 1;
|
|
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
//disable the interrupt, so the operation will not mess up
|
|
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
|
|
|
|
portENTER_CRITICAL(&ledc_spinlock);
|
|
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
|
|
int duty_delta = target_duty > duty_cur ? target_duty - duty_cur : duty_cur - target_duty;
|
|
if (duty_delta == 0) {
|
|
portEXIT_CRITICAL(&ledc_spinlock);
|
|
return ESP_OK;
|
|
}
|
|
s_ledc_fade_rec[speed_mode][channel]->speed_mode = speed_mode;
|
|
s_ledc_fade_rec[speed_mode][channel]->target_duty = target_duty;
|
|
s_ledc_fade_rec[speed_mode][channel]->cycle_num = cycle_num;
|
|
s_ledc_fade_rec[speed_mode][channel]->scale = scale;
|
|
int step_num;
|
|
if (duty_cur > target_duty) {
|
|
s_ledc_fade_rec[speed_mode][channel]->direction = LEDC_DUTY_DIR_DECREASE;
|
|
step_num = (duty_cur - target_duty) / scale;
|
|
step_num = step_num > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : step_num;
|
|
} else {
|
|
s_ledc_fade_rec[speed_mode][channel]->direction = LEDC_DUTY_DIR_INCREASE;
|
|
step_num = (target_duty - duty_cur) / scale;
|
|
step_num = step_num > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : step_num;
|
|
}
|
|
portEXIT_CRITICAL(&ledc_spinlock);
|
|
|
|
ledc_set_fade(
|
|
speed_mode,
|
|
channel,
|
|
duty_cur,
|
|
s_ledc_fade_rec[speed_mode][channel]->direction,
|
|
step_num,
|
|
s_ledc_fade_rec[speed_mode][channel]->cycle_num,
|
|
s_ledc_fade_rec[speed_mode][channel]->scale
|
|
);
|
|
ESP_LOGD(LEDC_TAG, "cur duty: %d; target: %d, step: %d, cycle: %d; scale: %d\n",
|
|
LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM,
|
|
target_duty,
|
|
step_num,
|
|
s_ledc_fade_rec[speed_mode][channel]->cycle_num,
|
|
s_ledc_fade_rec[speed_mode][channel]->scale
|
|
);
|
|
int bit_num_ch0 = (speed_mode == LEDC_HIGH_SPEED_MODE) ? LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S : LEDC_DUTY_CHNG_END_LSCH0_INT_ENA_S;
|
|
LEDC.int_clr.val |= BIT(bit_num_ch0 + channel);
|
|
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_FADE_END);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_fade_func_install(int intr_alloc_flags)
|
|
{
|
|
//OR intr_alloc_flags with ESP_INTR_FLAG_IRAM because the fade isr is in IRAM
|
|
return ledc_isr_register(ledc_fade_isr, NULL, intr_alloc_flags | ESP_INTR_FLAG_IRAM, &s_ledc_fade_isr_handle);
|
|
}
|
|
|
|
void ledc_fade_func_uninstall()
|
|
{
|
|
if (s_ledc_fade_rec == NULL) {
|
|
return;
|
|
}
|
|
if (s_ledc_fade_isr_handle) {
|
|
esp_intr_free(s_ledc_fade_isr_handle);
|
|
s_ledc_fade_isr_handle = NULL;
|
|
}
|
|
int channel, mode;
|
|
for (mode = 0; mode < LEDC_SPEED_MODE_MAX; mode++) {
|
|
for (channel = 0; channel < LEDC_CHANNEL_MAX; channel++) {
|
|
ledc_fade_channel_deinit(mode, channel);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
esp_err_t ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t wait_done)
|
|
{
|
|
LEDC_CHECK(s_ledc_fade_rec != NULL, LEDC_FADE_SERVICE_ERR_STR, ESP_ERR_INVALID_STATE);
|
|
LEDC_CHECK(wait_done < LEDC_FADE_MAX, LEDC_FADE_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
|
|
xSemaphoreTake(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux, portMAX_DELAY);
|
|
if (wait_done == LEDC_FADE_WAIT_DONE) {
|
|
s_ledc_fade_rec[speed_mode][channel]->mode = LEDC_FADE_WAIT_DONE;
|
|
ledc_update_duty(speed_mode, channel);
|
|
xSemaphoreTake(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, portMAX_DELAY);
|
|
} else {
|
|
s_ledc_fade_rec[speed_mode][channel]->mode = LEDC_FADE_NO_WAIT;
|
|
ledc_update_duty(speed_mode, channel);
|
|
}
|
|
xSemaphoreGive(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux);
|
|
return ESP_OK;
|
|
}
|