kopia lustrzana https://github.com/espressif/esp-idf
369 wiersze
14 KiB
C
369 wiersze
14 KiB
C
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// 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 "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/dport_reg.h"
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#include "soc/gpio_sig_map.h"
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#include "driver/ledc.h"
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//TODO: Move these debug options to menuconfig
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#define LEDC_DBG_WARING_ENABLE (0)
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#define LEDC_DBG_ERROR_ENABLE (0)
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#define LEDC_INFO_ENABLE (0)
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#define LEDC_DBG_ENABLE (0)
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//DBG INFOR
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#if LEDC_DBG_ENABLE
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#define LEDC_DBG(format,...) do{\
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ets_printf("[dbg][%s#%u]",__FUNCTION__,__LINE__);\
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ets_printf(format,##__VA_ARGS__);\
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}while(0)
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#else
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#define LEDC_DBG(...)
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#endif
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#if LEDC_INFO_ENABLE
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#define LEDC_INFO(format,...) do{\
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ets_printf("[info][%s#%u]",__FUNCTION__,__LINE__);\
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ets_printf(format,##__VA_ARGS__);\
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}while(0)
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#else
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#define LEDC_INFO(...)
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#endif
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#if LEDC_DBG_WARING_ENABLE
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#define LEDC_WARING(format,...) do{\
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ets_printf("[waring][%s#%u]",__FUNCTION__,__LINE__);\
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ets_printf(format,##__VA_ARGS__);\
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}while(0)
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#else
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#define LEDC_WARING(...)
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#endif
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#if LEDC_DBG_ERROR_ENABLE
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#define LEDC_ERROR(format,...) do{\
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ets_printf("[error][%s#%u]",__FUNCTION__,__LINE__);\
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ets_printf(format,##__VA_ARGS__);\
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}while(0)
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#else
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#define LEDC_ERROR(...)
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#endif
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static portMUX_TYPE ledc_spinlock = portMUX_INITIALIZER_UNLOCKED;
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static int ledc_is_valid_channel(uint32_t channel)
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{
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if(channel > LEDC_CHANNEL_7) {
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LEDC_ERROR("LEDC CHANNEL ERR: %d\n",channel);
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return 0;
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}
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return 1;
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}
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static int ledc_is_valid_mode(uint32_t mode)
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{
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if(mode >= LEDC_SPEED_MODE_MAX) {
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LEDC_ERROR("LEDC MODE ERR: %d\n",mode);
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return 0;
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}
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return 1;
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}
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static esp_err_t ledc_timer_config(ledc_mode_t speed_mode, uint32_t timer_sel, uint32_t div_num, uint32_t timer_lim,ledc_timer_source_t clk)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_timer[timer_sel].conf.div_num = div_num;
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LEDC.high_speed_timer[timer_sel].conf.tick_sel = clk;
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LEDC.high_speed_timer[timer_sel].conf.timer_lim = timer_lim;
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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_duty_config(ledc_mode_t speed_mode, uint32_t channel_num, uint32_t 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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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_channel[channel_num].hpoint.hpoint = hpoint_val;
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LEDC.high_speed_channel[channel_num].duty.duty = duty_val;
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LEDC.high_speed_channel[channel_num].conf1.duty_inc = duty_direction;
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LEDC.high_speed_channel[channel_num].conf1.duty_num = duty_num;
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LEDC.high_speed_channel[channel_num].conf1.duty_cycle = duty_cycle;
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LEDC.high_speed_channel[channel_num].conf1.duty_scale = duty_scale;
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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_set_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint32_t timer_idx)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_channel[channel].conf0.timer_sel = timer_idx;
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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_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_timer[timer_sel].conf.rst = 1;
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LEDC.high_speed_timer[timer_sel].conf.rst = 0;
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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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if(!ledc_is_valid_mode(speed_mode))
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return 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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if(intr_type & LEDC_INTR_FADE_END) {
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LEDC.int_ena.val = value | BIT(8 + channel);
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} else {
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LEDC.int_ena.val = (value & (~(BIT(8 + 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(uint32_t ledc_intr_num, void (*fn)(void*), void * arg)
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{
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if(fn == NULL)
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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ESP_INTR_DISABLE(ledc_intr_num);
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intr_matrix_set(xPortGetCoreID(), ETS_LEDC_INTR_SOURCE, ledc_intr_num);
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xt_set_interrupt_handler(ledc_intr_num, fn, arg);
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ESP_INTR_ENABLE(ledc_intr_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_config(ledc_config_t* ledc_conf)
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{
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SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN);
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CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
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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 freq_hz = ledc_conf->freq_hz;
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uint32_t timer_select = ledc_conf->timer_src;
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uint32_t duty_depth = ledc_conf->duty_depth;
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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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uint64_t div_param = 0;
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uint32_t precision = 0;
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if(!ledc_is_valid_channel(ledc_channel))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(gpio_num >= GPIO_NUM_34 || gpio_num == 20 || gpio_num == 24 || gpio_num == 28 || gpio_num == 29 || gpio_num == 30
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|| gpio_num == 31) {
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LEDC_ERROR("GPIO number error: IO%d\n ", gpio_num);
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return ESP_ERR_INVALID_ARG;
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}
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if(gpio_num >= GPIO_PIN_COUNT || 0 == GPIO_PIN_MUX_REG[gpio_num]) {
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LEDC_ERROR("io_num=%d does not exist\n", gpio_num);
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return ESP_ERR_INVALID_ARG;
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}
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if(freq_hz == 0 || duty_depth == 0 || duty_depth > LEDC_DUTY_DEPTH_15_BIT) {
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LEDC_ERROR("freq_hz=%u duty_depth=%u\n", div_param, duty_depth);
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return ESP_ERR_INVALID_ARG;
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}
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if(timer_select > LEDC_TIMER3) {
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LEDC_ERROR("Time Select %u\n", timer_select);
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return ESP_ERR_INVALID_ARG;
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}
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portENTER_CRITICAL(&ledc_spinlock);
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esp_err_t ret = ESP_OK;
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/*gpio matrix ledc pwm signal*/
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PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], 2);
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gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
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gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
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/*configure ledc param*/
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/*calculate the div_param and select which base clock and first we will select the apb_clk */
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precision = (0x1 << duty_depth); //2**depth
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div_param = (uint64_t) LEDC_APB_CLK_HZ * 256 / freq_hz / precision; //8bit fragment
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/*Fail ,because the div num overflow or too small*/
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if(div_param <= 256 || div_param > LEDC_DIV_NUM_HSTIMER0) { //REF TICK
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/*Selet the reference tick*/
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div_param = (uint64_t) LEDC_REF_CLK_HZ * 256 / freq_hz / precision;
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if(div_param <= 256 || div_param > LEDC_DIV_NUM_HSTIMER0_V) {
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LEDC_ERROR("div param err,div_param=%u\n", div_param);
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ret = ESP_FAIL;
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}
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ledc_timer_config(speed_mode, timer_select, div_param, duty_depth, LEDC_REF_TICK);
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ledc_set_channel_timer(speed_mode, ledc_channel, timer_select);
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} else { //APB TICK
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ledc_timer_config(speed_mode, timer_select, div_param, duty_depth, LEDC_APB_CLK);
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ledc_set_channel_timer(speed_mode, ledc_channel, timer_select);
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}
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ledc_timer_rst(speed_mode, timer_select);
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ledc_set_duty(speed_mode, ledc_channel, duty);
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ledc_enable_intr_type(speed_mode, ledc_channel, intr_type);
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LEDC_INFO("LEDC_PWM CHANNEL %1u|GPIO %02u|FreHz %05u|Duty %04u|Depth %04u|Time %01u|SourceClk %01u|Divparam %u\n",
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ledc_channel, gpio_num, freq_hz, duty, duty_depth, timer_select, timer_source_clk_flag, div_param
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);
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ledc_update(speed_mode, ledc_channel);
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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_update(ledc_mode_t speed_mode, ledc_channel_t channel)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_channel(channel))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_channel[channel].conf0.sig_out_en = 1;
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LEDC.high_speed_channel[channel].conf1.duty_start = 1;
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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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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_channel(channel))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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LEDC.high_speed_channel[channel].conf0.idle_lv = idle_level;
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LEDC.high_speed_channel[channel].conf0.sig_out_en = 0;
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LEDC.high_speed_channel[channel].conf1.duty_start = 0;
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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, uint32_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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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_channel(channel))
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return ESP_ERR_INVALID_ARG;
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if(fade_direction > LEDC_DUTY_DIR_INCREASE) {
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LEDC_ERROR("Duty direction err\n");
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return ESP_ERR_INVALID_ARG;
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}
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if(step_num > 0X3FF || duty_cyle_num > 0X3FF || duty_scale > 0X3FF) {
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LEDC_ERROR("step_num=%u duty_cyle_num=%u duty_scale=%u\n", step_num, duty_cyle_num, duty_scale);
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return ESP_ERR_INVALID_ARG;
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}
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portENTER_CRITICAL(&ledc_spinlock);
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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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portEXIT_CRITICAL(&ledc_spinlock);
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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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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_channel(channel))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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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,
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0 //uint32_t duty_scale
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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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uint32_t ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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uint32_t duty = 0;
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duty = (LEDC.high_speed_channel[channel].duty_rd.duty_read >> 4);
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return duty;
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}
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esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t freq_hz)
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{
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if(!ledc_is_valid_mode(speed_mode))
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return ESP_ERR_INVALID_ARG;
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if(!ledc_is_valid_channel(channel))
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return ESP_ERR_INVALID_ARG;
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portENTER_CRITICAL(&ledc_spinlock);
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esp_err_t ret = ESP_OK;
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uint32_t div_num = 0;
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/*Select timer*/
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uint32_t timer_select = LEDC.high_speed_channel[channel].conf0.timer_sel;
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/*Get timer limit*/
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uint32_t duty_depth = LEDC.high_speed_timer[timer_select].conf.timer_lim;
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uint32_t timer_source_clk = LEDC.high_speed_timer[timer_select].conf.tick_sel;
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uint32_t precision = (0x1 << duty_depth);
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if(timer_source_clk == LEDC_APB_CLK) {
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div_num = (uint64_t) LEDC_APB_CLK_HZ * 256 / freq_hz / precision;
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} else {
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div_num = (uint64_t) LEDC_REF_CLK_HZ * 256 / freq_hz / precision;
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}
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if(div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) {
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LEDC_ERROR("channel %u,div param err,div_param=%u\n", channel, div_num);
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ret = ESP_FAIL;
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}
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LEDC.high_speed_timer[timer_select].conf.div_num = div_num;
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portEXIT_CRITICAL(&ledc_spinlock);
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return ret;
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}
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uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_channel_t channel)
|
||
|
{
|
||
|
if(!ledc_is_valid_mode(speed_mode))
|
||
|
return 0;
|
||
|
if(!ledc_is_valid_channel(channel))
|
||
|
return ESP_ERR_INVALID_ARG;
|
||
|
portENTER_CRITICAL(&ledc_spinlock);
|
||
|
uint32_t freq = 0;
|
||
|
uint32_t timer_select = LEDC.high_speed_channel[channel].conf0.timer_sel;
|
||
|
uint32_t timer_source_clk = LEDC.high_speed_timer[timer_select].conf.tick_sel;
|
||
|
uint32_t duty_depth = LEDC.high_speed_timer[timer_select].conf.timer_lim;
|
||
|
uint32_t div_num = LEDC.high_speed_timer[timer_select].conf.div_num;
|
||
|
uint32_t precision = (0x1 << duty_depth);
|
||
|
if(timer_source_clk == LEDC_APB_CLK) {
|
||
|
freq = ((uint64_t) LEDC_APB_CLK_HZ) * 256 / precision / div_num;
|
||
|
} else {
|
||
|
freq = ((uint64_t) LEDC_REF_CLK_HZ) * 256 / precision / div_num;
|
||
|
}
|
||
|
portEXIT_CRITICAL(&ledc_spinlock);
|
||
|
return freq;
|
||
|
}
|