792 lines
34 KiB
C
792 lines
34 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 <string.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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#define LEDC_ARG_CHECK(a, param) LEDC_CHECK(a, param " argument is invalid", ESP_ERR_INVALID_ARG)
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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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uint32_t 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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#if CONFIG_SPIRAM_USE_MALLOC
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StaticQueue_t ledc_fade_sem_storage;
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#endif
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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_HPOINT_VAL_MAX (LEDC_HPOINT_HSCH1_V)
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#define LEDC_FADE_TOO_SLOW_STR "LEDC FADE TOO SLOW"
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#define LEDC_FADE_TOO_FAST_STR "LEDC FADE TOO FAST"
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static const char *LEDC_FADE_SERVICE_ERR_STR = "LEDC fade service not installed";
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static const char *LEDC_FADE_INIT_ERROR_STR = "LEDC fade channel init error, not enough memory or service not installed";
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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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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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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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static void _ledc_fade_hw_acquire(ledc_mode_t mode, ledc_channel_t channel)
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{
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ledc_fade_t* fade = s_ledc_fade_rec[mode][channel];
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if (fade) {
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xSemaphoreTake(fade->ledc_fade_sem, portMAX_DELAY);
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ledc_enable_intr_type(mode, channel, LEDC_INTR_DISABLE);
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}
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}
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static void _ledc_fade_hw_release(ledc_mode_t mode, ledc_channel_t channel)
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{
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ledc_fade_t* fade = s_ledc_fade_rec[mode][channel];
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if (fade) {
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xSemaphoreGive(fade->ledc_fade_sem);
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}
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}
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static void _ledc_op_lock_acquire(ledc_mode_t mode, ledc_channel_t channel)
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{
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ledc_fade_t* fade = s_ledc_fade_rec[mode][channel];
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if (fade) {
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xSemaphoreTake(fade->ledc_fade_mux, portMAX_DELAY);
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}
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}
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static void _ledc_op_lock_release(ledc_mode_t mode, ledc_channel_t channel)
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{
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ledc_fade_t* fade = s_ledc_fade_rec[mode][channel];
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if (fade) {
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xSemaphoreGive(fade->ledc_fade_mux);
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}
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}
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static int ledc_get_max_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
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{
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// The arguments are checked before internally calling this function.
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int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
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int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.duty_resolution));
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return max_duty;
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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 clock_divider, uint32_t duty_resolution,
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ledc_clk_src_t clk_src)
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{
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LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(timer_sel < LEDC_TIMER_MAX, "timer_select");
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.timer_group[speed_mode].timer[timer_sel].conf.clock_divider = clock_divider;
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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.duty_resolution = duty_resolution;
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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, int 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 & LEDC_HPOINT_HSCH1_V;
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}
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if (duty_val >= 0) {
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LEDC.channel_group[speed_mode].channel[channel_num].duty.duty = duty_val;
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}
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(timer_idx < LEDC_TIMER_MAX, "timer_select"); 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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(timer_sel < LEDC_TIMER_MAX, "timer_select");
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(timer_sel < LEDC_TIMER_MAX, "timer_select");
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(timer_sel < LEDC_TIMER_MAX, "timer_select");
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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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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_ARG_CHECK(fn, "fn");
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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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LEDC_ARG_CHECK(timer_conf != NULL, "timer_conf");
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uint32_t freq_hz = timer_conf->freq_hz;
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uint32_t duty_resolution = timer_conf->duty_resolution;
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uint32_t timer_num = timer_conf->timer_num;
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uint32_t speed_mode = timer_conf->speed_mode;
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LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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periph_module_enable(PERIPH_LEDC_MODULE);
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if (freq_hz == 0 || duty_resolution == 0 || duty_resolution >= LEDC_TIMER_BIT_MAX) {
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ESP_LOGE(LEDC_TAG, "freq_hz=%u duty_resolution=%u", freq_hz, duty_resolution);
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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 << duty_resolution ); // 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 duty resolution can not be achieved, try reducing freq_hz or duty_resolution. 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 duty resolution can not be achieved, try increasing freq_hz or duty_resolution. 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, duty_resolution, 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_ARG_CHECK(ledc_channel < LEDC_CHANNEL_MAX, "ledc_channel");
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LEDC_ARG_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "gpio_num");
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LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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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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LEDC_ARG_CHECK(ledc_conf, "ledc_conf");
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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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uint32_t hpoint = ledc_conf->hpoint;
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LEDC_ARG_CHECK(ledc_channel < LEDC_CHANNEL_MAX, "ledc_channel");
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LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "gpio_num");
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LEDC_ARG_CHECK(timer_select < LEDC_TIMER_MAX, "timer_select");
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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 and hpoint value, duty range is (0 ~ ((2 ** duty_resolution) - 1)), max hpoint value is 0xfffff*/
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ledc_set_duty_with_hpoint(speed_mode, ledc_channel, duty, hpoint);
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
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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_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
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LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
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LEDC_ARG_CHECK(fade_direction < LEDC_DUTY_DIR_MAX, "fade_direction");
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LEDC_ARG_CHECK(step_num <= LEDC_DUTY_NUM_HSCH0_V, "step_num");
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LEDC_ARG_CHECK(duty_cyle_num <= LEDC_DUTY_CYCLE_HSCH0_V, "duty_cycle_num");
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LEDC_ARG_CHECK(duty_scale <= LEDC_DUTY_SCALE_HSCH0_V, "duty_scale");
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_ledc_fade_hw_acquire(speed_mode, channel);
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ledc_duty_config(speed_mode,
|
|
channel, //uint32_t chan_num,
|
|
LEDC_VAL_NO_CHANGE,
|
|
duty << 4, //uint32_t duty_val,the least 4 bits are decimal part
|
|
fade_direction, //uint32_t increase,
|
|
step_num, //uint32_t duty_num,
|
|
duty_cyle_num, //uint32_t duty_cycle,
|
|
duty_scale //uint32_t duty_scale
|
|
);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_set_duty_with_hpoint(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, uint32_t hpoint)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK(hpoint <= LEDC_HPOINT_VAL_MAX, "hpoint");
|
|
/* The channel configuration should not be changed before the fade operation is done. */
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
ledc_duty_config(speed_mode,
|
|
channel, //uint32_t chan_num,
|
|
hpoint, //uint32_t hpoint_val,
|
|
duty << 4, //uint32_t duty_val,the least 4 bits are decimal part
|
|
1, //uint32_t increase,
|
|
1, //uint32_t duty_num,
|
|
1, //uint32_t duty_cycle,
|
|
0 //uint32_t duty_scale
|
|
);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
/* The channel configuration should not be changed before the fade operation is done. */
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
ledc_duty_config(speed_mode,
|
|
channel, //uint32_t chan_num,
|
|
LEDC_VAL_NO_CHANGE,
|
|
duty << 4, //uint32_t duty_val,the least 4 bits are decimal part
|
|
1, //uint32_t increase,
|
|
1, //uint32_t duty_num,
|
|
1, //uint32_t duty_cycle,
|
|
0 //uint32_t duty_scale
|
|
);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
uint32_t ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
uint32_t duty = (LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> 4);
|
|
return duty;
|
|
}
|
|
|
|
int ledc_get_hpoint(ledc_mode_t speed_mode, ledc_channel_t channel)
|
|
{
|
|
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode argument is invalid", LEDC_ERR_VAL);
|
|
LEDC_CHECK(channel < LEDC_CHANNEL_MAX, "channel argument is invalid", LEDC_ERR_VAL);
|
|
uint32_t hpoint = LEDC.channel_group[speed_mode].channel[channel].hpoint.hpoint;
|
|
return hpoint;
|
|
}
|
|
|
|
esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
portENTER_CRITICAL(&ledc_spinlock);
|
|
esp_err_t ret = ESP_OK;
|
|
uint32_t clock_divider = 0;
|
|
uint32_t duty_resolution = LEDC.timer_group[speed_mode].timer[timer_num].conf.duty_resolution;
|
|
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
|
|
uint32_t precision = (0x1 << duty_resolution);
|
|
if (timer_source_clk == LEDC_APB_CLK) {
|
|
clock_divider = ((uint64_t) LEDC_APB_CLK_HZ << 8) / freq_hz / precision;
|
|
} else {
|
|
clock_divider = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
|
|
}
|
|
if (clock_divider <= 256 || clock_divider > LEDC_DIV_NUM_HSTIMER0) {
|
|
ESP_LOGE(LEDC_TAG, "div param err,div_param=%u", clock_divider);
|
|
ret = ESP_FAIL;
|
|
}
|
|
LEDC.timer_group[speed_mode].timer[timer_num].conf.clock_divider = clock_divider;
|
|
ledc_ls_timer_update(speed_mode, timer_num);
|
|
portEXIT_CRITICAL(&ledc_spinlock);
|
|
return ret;
|
|
}
|
|
|
|
uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
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 duty_resolution = LEDC.timer_group[speed_mode].timer[timer_num].conf.duty_resolution;
|
|
uint32_t clock_divider = LEDC.timer_group[speed_mode].timer[timer_num].conf.clock_divider;
|
|
uint32_t precision = (0x1 << duty_resolution);
|
|
if (timer_source_clk == LEDC_APB_CLK) {
|
|
freq = ((uint64_t) LEDC_APB_CLK_HZ << 8) / precision / clock_divider;
|
|
} else {
|
|
freq = ((uint64_t) LEDC_REF_CLK_HZ << 8) / precision / clock_divider;
|
|
}
|
|
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;
|
|
}
|
|
uint32_t 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) {
|
|
xSemaphoreGiveFromISR(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, &HPTaskAwoken);
|
|
if (HPTaskAwoken == pdTRUE) {
|
|
portYIELD_FROM_ISR();
|
|
}
|
|
continue;
|
|
}
|
|
uint32_t duty_tar = s_ledc_fade_rec[speed_mode][channel]->target_duty;
|
|
int scale = s_ledc_fade_rec[speed_mode][channel]->scale;
|
|
if (scale == 0) {
|
|
xSemaphoreGiveFromISR(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, &HPTaskAwoken);
|
|
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_isr_handle == NULL) {
|
|
ESP_LOGE(LEDC_TAG, "Fade service not installed, call ledc_fade_func_install");
|
|
return ESP_FAIL;
|
|
}
|
|
if (s_ledc_fade_rec[speed_mode][channel] == NULL) {
|
|
#if CONFIG_SPIRAM_USE_MALLOC
|
|
s_ledc_fade_rec[speed_mode][channel] = (ledc_fade_t *) heap_caps_calloc(1, sizeof(ledc_fade_t), MALLOC_CAP_INTERNAL|MALLOC_CAP_8BIT);
|
|
if (!s_ledc_fade_rec[speed_mode][channel]) {
|
|
ledc_fade_channel_deinit(speed_mode, channel);
|
|
return ESP_FAIL;
|
|
}
|
|
|
|
memset(&s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem_storage, 0, sizeof(StaticQueue_t));
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem = xSemaphoreCreateBinaryStatic(&s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem_storage);
|
|
#else
|
|
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_sem = xSemaphoreCreateBinary();
|
|
#endif
|
|
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux = xSemaphoreCreateMutex();
|
|
xSemaphoreGive(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem);
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
static esp_err_t _ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, int scale, int cycle_num)
|
|
{
|
|
portENTER_CRITICAL(&ledc_spinlock);
|
|
uint32_t duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
|
|
// When duty == max_duty, meanwhile, if scale == 1 and fade_down == 1, counter would overflow.
|
|
if (duty_cur == ledc_get_max_duty(speed_mode, channel)) {
|
|
duty_cur -= 1;
|
|
}
|
|
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 = 0;
|
|
int dir = LEDC_DUTY_DIR_DECREASE;
|
|
if (scale > 0) {
|
|
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;
|
|
dir = 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);
|
|
if (scale > 0 && step_num > 0) {
|
|
ledc_duty_config(speed_mode, channel, LEDC_VAL_NO_CHANGE, duty_cur << 4, dir, step_num, cycle_num, scale);
|
|
ESP_LOGD(LEDC_TAG, "cur duty: %d; target: %d, step: %d, cycle: %d; scale: %d; dir: %d\n",
|
|
duty_cur, target_duty, step_num, cycle_num, scale, dir);
|
|
} else {
|
|
ledc_duty_config(speed_mode, channel, LEDC_VAL_NO_CHANGE, target_duty << 4, dir, 0, 1, 0);
|
|
ESP_LOGD(LEDC_TAG, "Set to target duty: %d", target_duty);
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t _ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, int max_fade_time_ms)
|
|
{
|
|
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
|
|
uint32_t freq = ledc_get_freq(speed_mode, timer_sel);
|
|
uint32_t duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
|
|
uint32_t duty_delta = target_duty > duty_cur ? target_duty - duty_cur : duty_cur - target_duty;
|
|
|
|
if (duty_delta == 0) {
|
|
return _ledc_set_fade_with_step(speed_mode, channel, target_duty, 0, 0);
|
|
}
|
|
int total_cycles = max_fade_time_ms * freq / 1000;
|
|
if (total_cycles == 0) {
|
|
ESP_LOGW(LEDC_TAG, LEDC_FADE_TOO_FAST_STR);
|
|
return _ledc_set_fade_with_step(speed_mode, channel, target_duty, 0, 0);
|
|
}
|
|
int scale, cycle_num;
|
|
if (total_cycles > duty_delta) {
|
|
scale = 1;
|
|
cycle_num = total_cycles / duty_delta;
|
|
if (cycle_num > LEDC_DUTY_NUM_HSCH0_V) {
|
|
ESP_LOGW(LEDC_TAG, LEDC_FADE_TOO_SLOW_STR);
|
|
cycle_num = LEDC_DUTY_NUM_HSCH0_V;
|
|
}
|
|
} else {
|
|
cycle_num = 1;
|
|
scale = duty_delta / total_cycles;
|
|
if (scale > LEDC_DUTY_SCALE_HSCH0_V) {
|
|
ESP_LOGW(LEDC_TAG, LEDC_FADE_TOO_FAST_STR);
|
|
scale = LEDC_DUTY_SCALE_HSCH0_V;
|
|
}
|
|
}
|
|
return _ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
|
|
}
|
|
|
|
static void _ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t fade_mode)
|
|
{
|
|
s_ledc_fade_rec[speed_mode][channel]->mode = fade_mode;
|
|
// Clear interrupt status of channel
|
|
int duty_resolution_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(duty_resolution_ch0 + channel);
|
|
// Enable interrupt for channel
|
|
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_FADE_END);
|
|
ledc_update_duty(speed_mode, channel);
|
|
if (fade_mode == LEDC_FADE_WAIT_DONE) {
|
|
xSemaphoreTake(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, portMAX_DELAY);
|
|
}
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, int max_fade_time_ms)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK(target_duty <= ledc_get_max_duty(speed_mode, channel), "target_duty");
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_set_fade_with_time(speed_mode, channel, target_duty, max_fade_time_ms);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t scale, uint32_t cycle_num)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK((scale > 0) && (scale <= LEDC_DUTY_SCALE_HSCH0_V), "fade scale");
|
|
LEDC_ARG_CHECK((cycle_num > 0) && (cycle_num <= LEDC_DUTY_CYCLE_HSCH0_V), "cycle_num");
|
|
LEDC_ARG_CHECK(target_duty <= ledc_get_max_duty(speed_mode, channel), "target_duty");
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t fade_mode)
|
|
{
|
|
LEDC_CHECK(s_ledc_fade_rec != NULL, LEDC_FADE_SERVICE_ERR_STR, ESP_ERR_INVALID_STATE);
|
|
LEDC_ARG_CHECK(fade_mode < LEDC_FADE_MAX, "fade_mode");
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_fade_start(speed_mode, channel, fade_mode);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
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) {
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esp_intr_free(s_ledc_fade_isr_handle);
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|
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;
|
|
}
|
|
|
|
/*
|
|
* The functions below are thread-safe version of APIs for duty and fade control.
|
|
* These APIs can be called from different tasks.
|
|
*/
|
|
esp_err_t ledc_set_duty_and_update(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, uint32_t hpoint)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK(duty <= ledc_get_max_duty(speed_mode, channel), "target_duty");
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
_ledc_op_lock_acquire(speed_mode, channel);
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_set_fade_with_step(speed_mode, channel, duty, 0, 1);
|
|
_ledc_fade_start(speed_mode, channel, LEDC_FADE_WAIT_DONE);
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
_ledc_op_lock_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_time_and_start(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t max_fade_time_ms, ledc_fade_mode_t fade_mode)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK(fade_mode < LEDC_FADE_MAX, "fade_mode");
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
LEDC_ARG_CHECK(target_duty <= ledc_get_max_duty(speed_mode, channel), "target_duty");
|
|
_ledc_op_lock_acquire(speed_mode, channel);
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_set_fade_with_time(speed_mode, channel, target_duty, max_fade_time_ms);
|
|
_ledc_fade_start(speed_mode, channel, fade_mode);
|
|
if (fade_mode == LEDC_FADE_WAIT_DONE) {
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
}
|
|
_ledc_op_lock_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t ledc_set_fade_step_and_start(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t scale, uint32_t cycle_num, ledc_fade_mode_t fade_mode)
|
|
{
|
|
LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
|
|
LEDC_ARG_CHECK(channel < LEDC_CHANNEL_MAX, "channel");
|
|
LEDC_ARG_CHECK(fade_mode < LEDC_FADE_MAX, "fade_mode");
|
|
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
|
|
LEDC_ARG_CHECK((scale > 0) && (scale <= LEDC_DUTY_SCALE_HSCH0_V), "fade scale");
|
|
LEDC_ARG_CHECK((cycle_num > 0) && (cycle_num <= LEDC_DUTY_CYCLE_HSCH0_V), "cycle_num");
|
|
LEDC_ARG_CHECK(target_duty <= ledc_get_max_duty(speed_mode, channel), "target_duty");
|
|
_ledc_op_lock_acquire(speed_mode, channel);
|
|
_ledc_fade_hw_acquire(speed_mode, channel);
|
|
_ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
|
|
_ledc_fade_start(speed_mode, channel, fade_mode);
|
|
if (fade_mode == LEDC_FADE_WAIT_DONE) {
|
|
_ledc_fade_hw_release(speed_mode, channel);
|
|
}
|
|
_ledc_op_lock_release(speed_mode, channel);
|
|
return ESP_OK;
|
|
}
|