From 85cd269ef804d1565eb3591ca92ecc26d789fd42 Mon Sep 17 00:00:00 2001 From: Wangjialin Date: Fri, 23 Sep 2016 09:21:37 +0800 Subject: [PATCH] add ledc driver code --- components/driver/include/driver/ledc.h | 301 +++++++++++++++++++ components/driver/ledc.c | 368 ++++++++++++++++++++++++ 2 files changed, 669 insertions(+) create mode 100644 components/driver/include/driver/ledc.h create mode 100644 components/driver/ledc.c diff --git a/components/driver/include/driver/ledc.h b/components/driver/include/driver/ledc.h new file mode 100644 index 0000000000..728fad460d --- /dev/null +++ b/components/driver/include/driver/ledc.h @@ -0,0 +1,301 @@ +// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at + +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef _DRIVER_LEDC_H_ +#define _DRIVER_LEDC_H_ +#include "esp_err.h" +#include "soc/soc.h" +#include "soc/ledc_reg.h" +#include "soc/ledc_reg.h" +#include "soc/ledc_struct.h" +#include "driver/gpio.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define LEDC_APB_CLK_HZ (APB_CLK_FREQ) +#define LEDC_REF_CLK_HZ (1*1000000) + +typedef enum { + LEDC_HIGH_SPEED_MODE = 0, /*LEDC high speed speed_mode */ + //in this version, we only support high speed speed_mode. We will access low speed speed_mode later + //LEDC_LOW_SPEED_MODE, /*LEDC low speed speed_mode */ + LEDC_SPEED_MODE_MAX, +} ledc_mode_t; +typedef enum { + LEDC_INTR_DISABLE = 0, /*Disable LEDC interrupt */ + LEDC_INTR_FADE_END, /*Enable LEDC interrupt */ +} ledc_intr_type_t; +typedef enum { + LEDC_DUTY_DIR_DECREASE = 0, /*LEDC duty decrease direction */ + LEDC_DUTY_DIR_INCREASE = 1, /*LEDC duty increase direction */ +} ledc_duty_direction_t; +typedef enum { + LEDC_REF_TICK = 0, // 1MhZ + LEDC_APB_CLK, //80Mhz +}ledc_timer_src_t; +typedef enum { + LEDC_TIMER0 = 0, /*LEDC source time TIME0 */ + LEDC_TIMER1, /*LEDC source time TIME1 */ + LEDC_TIMER2, /*LEDC source time TIME2 */ + LEDC_TIMER3, /*LEDC source time TIME3 */ +} ledc_timer_source_t; +typedef enum { + LEDC_CHANNEL_0 = 0, /*LEDC channel 0 */ + LEDC_CHANNEL_1, /*LEDC channel 1 */ + LEDC_CHANNEL_2, /*LEDC channel 2 */ + LEDC_CHANNEL_3, /*LEDC channel 3 */ + LEDC_CHANNEL_4, /*LEDC channel 4 */ + LEDC_CHANNEL_5, /*LEDC channel 5 */ + LEDC_CHANNEL_6, /*LEDC channel 6 */ + LEDC_CHANNEL_7, /*LEDC channel 7 */ +} ledc_channel_t; +typedef enum { + LEDC_DUTY_DEPTH_10_BIT = 10, /*LEDC PWM depth 10Bit */ + LEDC_DUTY_DEPTH_11_BIT = 11, /*LEDC PWM depth 11Bit */ + LEDC_DUTY_DEPTH_12_BIT = 12, /*LEDC PWM depth 12Bit */ + LEDC_DUTY_DEPTH_13_BIT = 13, /*LEDC PWM depth 13Bit */ + LEDC_DUTY_DEPTH_14_BIT = 14, /*LEDC PWM depth 14Bit */ + LEDC_DUTY_DEPTH_15_BIT = 15, /*LEDC PWM depth 15Bit */ +} ledc_duty_depth_t; + +typedef struct ledc_channel_t_config { + int gpio_num; /*the LEDC output gpio_num, if you want to use gpio16, ledc_config_t.gpio_num = 16*/ + ledc_mode_t speed_mode; /*LEDC speed speed_mode*/ + ledc_channel_t channel; /*LEDC channel(0 - 7)*/ + ledc_intr_type_t intr_type; /*configure interrupt , Fade interrupt enable or Fade interrupt disable*/ + ledc_timer_source_t timer_src; /*Select the timer source of channel (0 - 3)*/ + uint32_t freq_hz; /*LEDC channel frequency(Hz)*/ + uint32_t duty; /*LEDC channel duty,the duty range is [0,(2**duty_depth) - 1],*/ + ledc_duty_depth_t duty_depth; /*LEDC channel duty depth*/ +} ledc_config_t; + +/** + * @brief LEDC common configuration + * + * User this Function,configure LEDC with the given channel/output gpio_num/interrupt/source timer/frequency(Hz)/LEDC depth + * + * @param[in] ledc_config_t + * ledc_config_t.speed_mode : LEDC speed speed_mode + * ledc_config_t.gpio_num : LEDC output gpio_num, if you want to use gpio16, ledc_config_t.gpio_num = 16 + * ledc_config_t.channel : LEDC channel(0 - 7) + * ledc_config_t.intr_type : configure interrupt , Fade interrupt enable or Fade interrupt disable + * ledc_config_t.timer_src : Select the timer source of channel (0 - 3) + * When different channel ,select same timer ,their freq_hz and duty_depth must be the same + * ledc_config_t.freq_hz : LEDC channel frequency(Hz), + * When different channel ,select same time ,their freq_hz and duty_depth must be same + * ledc_config_t.duty : LEDC channel duty,the duty range is [0,(2**duty_depth) - 1], + * ledc_config_t.duty_depth : LEDC channel duty depth + * When different channel ,select same time ,their freq_hz and duty_depth must be same + * @return ESP_OK: success + * ESP_ERR_INVALID_ARG: parameter error + * ESP_FAIL: spin_lock error + * + */ +esp_err_t ledc_config(ledc_config_t* ledc_conf); + +/** + * @brief LEDC start + * + * Call this function to activate the LEDC updated parameters. + * After ledc_set_duty,ledc_set_fade, we need to call this function to update the settings. + * + * @param[in] speed_mode : select the LEDC speed_mode, high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * @return ESP_OK: success + * ESP_ERR_INVALID_ARG: parameter error + * ESP_FAIL: spin_lock error + * + */ +esp_err_t ledc_update(ledc_mode_t speed_mode, ledc_channel_t channel); + +/** + * @brief LEDC stop + * + * Disable LEDC output,and set idle level + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * @return ESP_OK: success + * ESP_ERR_INVALID_ARG: parameter error + * ESP_FAIL: spin_lock error + */ +esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level); + +/** + * @brief LEDC set channel frequency(Hz) + * + * Set LEDC frequency(Hz) + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : current channel(0-7) + * + * @param[in] freq_hz : set the LEDC frequency + * + * @return ESP_OK: success + * ESP_ERR_INVALID_ARG: parameter error + * ESP_FAIL: spin_lock error + */ +esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t freq_hz); + +/** + * @brief LEDC get channel frequency(Hz) + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * @return 0 : error + * others : current LEDC frequency + * + */ +uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_channel_t channel); + +/** + * @brief LEDC set duty + * + * Set LEDC duty ,After the function calls the ledc_update function, the function can take effect. + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * @param[in] duty : set the LEDC duty ,the duty range is [0,(2**duty_depth) - 1] + * + * @return ESP_OK: success + * ESP_ERR_INVALID_ARG: parameter error + * ESP_FAIL: spin_lock error + */ +esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty); + +/** + * @brief LEDC get duty + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * + * @return current LEDC duty + * + */ +uint32_t ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel); + +/** + * @brief LEDC set gradient + * + * Set LEDC gradient , After the function calls the ledc_update function , the function can take effect. + * + * @param[in] speed_mode : select the LEDC speed_mode,high-speed speed_mode and low-speed speed_mode,now we only support high-speed speed_mode ,next will add low-speed speed_mode + * + * @param[in] channel : LEDC channel(0-7) + * + * @param[in] duty : set the start of the gradient duty , the duty range is [0,(2**duty_depth) - 1] + * + * @param[in] gradule_direction : set the direction of the gradient + * + * @param[in] step_num : set the number of the gradient + * + * @param[in] duty_cyle_num : set how many LEDC tick each time the gradient lasts + * + * @param[in] duty_scale : set gradient change amplitude + * + * @return ESP_OK : success + * ESP_ERR_INVALID_ARG : parameter error + * ESP_FAIL : spin_lock error + */ +esp_err_t ledc_set_fade(ledc_mode_t speed_mode, uint32_t channel, uint32_t duty, ledc_duty_direction_t gradule_direction, + uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale); + +/** + * @brief register LEDC interrupt handler, the handler is an ISR. + * The handler will be attached to the same CPU core that this function is running on. + * Users should know that which CPU is running and then pick a INUM that is not used by system. + * We can find the information of INUM and interrupt level in soc.h. + * TODO: to move INUM options to menu_config + * @parameter uint32_t ledc_intr_num : LEDC interrupt number,check the info in soc.h, and please see the core-isa.h for more details + * @parameter void (* fn)(void* ) : interrupt handler function. + * Note that the handler function MUST be defined with attribution of "IRAM_ATTR". + * @parameter void * arg : parameter for handler function + * + * @return ESP_OK : success ; + * ESP_ERR_INVALID_ARG : fucntion ptr error. + * ESP_FAIL : spin_lock error + */ +esp_err_t ledc_isr_register(uint32_t ledc_intr_num, void (*fn)(void*), void * arg); + + + + + +/***************************EXAMPLE********************************** + * + * + * ----------------EXAMPLE OF LEDC SETTING --------------------- + * ledc_config_t ledc_conf = { + * .channel = LEDC_CHANNEL_0; //set LEDC channel 0 + * .duty = 1000; //set the duty for initialization.(duty range is 0 ~ ((2**duty_depth)-1) + * .freq_hz = 1000; //set frequency , e.g.,1KHz + * .gpio_num = 16; //GPIO number + * .intr_type = LEDC_INTR_FADE_END; //GPIO INTR TYPE, as an example,we enable fade_end interrupt here. + * .duty_depth = LEDC_DUTY_DEPTH_12_BIT; //set duty_depth , (duty range is 0 ~ ((2**duty_depth)-1) + * .speed_mode = LEDC_HIGH_SPEED_MODE; //set LEDC mode, from ledc_mode_t + * .timer_src = LEDC_TIMER0; //set LEDC timer source, if different channel use one timer, the frequency and duty_depth of these channels should be the same + * } + * ledc_config(&ledc_conf); //setup the configuration + * ----------------EXAMPLE OF SETTING DUTY --- ----------------- + * uint32_t ledc_channel = LEDC_CHANNEL_0; //LEDC channel(0-73) + * uint32_t duty = 2000; //duty range is 0 ~ ((2**duty_depth)-1) + * LEDC_set_duty(LEDC_HIGH_SPEED_MODE,ledc_channel,duty); //set speed mode, channel, and duty. + * ledc_update(LEDC_HIGH_SPEED_MODE,ledc_channel); //after set duty, we need to call ledc_update to update the settings. + * + * + * ----------------EXAMPLE OF LEDC INTERRUPT ------------------ + * //we have fade_end interrupt and counter overflow interrupt. we just give an example of fade_end interrupt here. + * ledc_isr_register(18, ledc_isr_handler, NULL); //hook the isr handler for LEDC interrupt + * //the first parameter is INUM, you can pick one form interrupt level 1/2 which is not used by the system. + * //NOTE1:user should arrange the INUMs that used, better not to use a same INUM for different interrupt source. + * //NOTE2:do not pick the INUM that already occupied by the system. + * //NOTE3:refer to soc.h to check which INUMs that can be used. + * ----------------EXAMPLE OF INTERRUPT HANDLER --------------- + * #include "esp_attr.h" + * void IRAM_ATTR ledc_isr_handler(void* arg) //we should add 'IRAM_ATTR' attribution when we declare the isr function + * { + * uint32_t intr_st = LEDC.int_st.val; //read LEDC interrupt status. + * + * //you will find which channels have triggered fade_end interrupt here, + * //then , you can post some event to RTOS queue to process the event. + * //later we will add a queue in the driver code. + * + * LEDC.int_clr.val = intr_st; //clear LEDC interrupt status. + * } + * + * + *--------------------------END OF EXAMPLE -------------------------- + */ + + + + +#ifdef __cplusplus +} +#endif + +#endif /* _DRIVER_LEDC_H_ */ diff --git a/components/driver/ledc.c b/components/driver/ledc.c new file mode 100644 index 0000000000..7b7920f53a --- /dev/null +++ b/components/driver/ledc.c @@ -0,0 +1,368 @@ +// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at + +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +#include +#include "esp_intr.h" +#include "freertos/FreeRTOS.h" +#include "freertos/semphr.h" +#include "freertos/xtensa_api.h" +#include "soc/dport_reg.h" +#include "soc/gpio_sig_map.h" +#include "driver/ledc.h" + +//TODO: Move these debug options to menuconfig +#define LEDC_DBG_WARING_ENABLE (0) +#define LEDC_DBG_ERROR_ENABLE (0) +#define LEDC_INFO_ENABLE (0) +#define LEDC_DBG_ENABLE (0) + +//DBG INFOR +#if LEDC_DBG_ENABLE +#define LEDC_DBG(format,...) do{\ + ets_printf("[dbg][%s#%u]",__FUNCTION__,__LINE__);\ + ets_printf(format,##__VA_ARGS__);\ +}while(0) +#else +#define LEDC_DBG(...) +#endif + +#if LEDC_INFO_ENABLE +#define LEDC_INFO(format,...) do{\ + ets_printf("[info][%s#%u]",__FUNCTION__,__LINE__);\ + ets_printf(format,##__VA_ARGS__);\ +}while(0) +#else +#define LEDC_INFO(...) +#endif + +#if LEDC_DBG_WARING_ENABLE +#define LEDC_WARING(format,...) do{\ + ets_printf("[waring][%s#%u]",__FUNCTION__,__LINE__);\ + ets_printf(format,##__VA_ARGS__);\ +}while(0) +#else +#define LEDC_WARING(...) +#endif +#if LEDC_DBG_ERROR_ENABLE +#define LEDC_ERROR(format,...) do{\ + ets_printf("[error][%s#%u]",__FUNCTION__,__LINE__);\ + ets_printf(format,##__VA_ARGS__);\ +}while(0) +#else +#define LEDC_ERROR(...) +#endif + +static portMUX_TYPE ledc_spinlock = portMUX_INITIALIZER_UNLOCKED; + +static int ledc_is_valid_channel(uint32_t channel) +{ + if(channel > LEDC_CHANNEL_7) { + LEDC_ERROR("LEDC CHANNEL ERR: %d\n",channel); + return 0; + } + return 1; +} + +static int ledc_is_valid_mode(uint32_t mode) +{ + if(mode >= LEDC_SPEED_MODE_MAX) { + LEDC_ERROR("LEDC MODE ERR: %d\n",mode); + return 0; + } + return 1; +} + + +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) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_timer[timer_sel].conf.div_num = div_num; + LEDC.high_speed_timer[timer_sel].conf.tick_sel = clk; + LEDC.high_speed_timer[timer_sel].conf.timer_lim = timer_lim; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +static esp_err_t ledc_duty_config(ledc_mode_t speed_mode, uint32_t channel_num, uint32_t hpoint_val, uint32_t duty_val, + uint32_t duty_direction, uint32_t duty_num, uint32_t duty_cycle, uint32_t duty_scale) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_channel[channel_num].hpoint.hpoint = hpoint_val; + LEDC.high_speed_channel[channel_num].duty.duty = duty_val; + LEDC.high_speed_channel[channel_num].conf1.duty_inc = duty_direction; + LEDC.high_speed_channel[channel_num].conf1.duty_num = duty_num; + LEDC.high_speed_channel[channel_num].conf1.duty_cycle = duty_cycle; + LEDC.high_speed_channel[channel_num].conf1.duty_scale = duty_scale; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +static esp_err_t ledc_set_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint32_t timer_idx) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_channel[channel].conf0.timer_sel = timer_idx; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +static esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_timer[timer_sel].conf.rst = 1; + LEDC.high_speed_timer[timer_sel].conf.rst = 0; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} +static esp_err_t ledc_enable_intr_type(ledc_mode_t speed_mode, uint32_t channel, ledc_intr_type_t type) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + uint32_t value; + uint32_t intr_type = type; + portENTER_CRITICAL(&ledc_spinlock); + value = LEDC.int_ena.val; + if(intr_type & LEDC_INTR_FADE_END) { + LEDC.int_ena.val = value | BIT(8 + channel); + } else { + LEDC.int_ena.val = (value & (~(BIT(8 + channel)))); + } + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +esp_err_t ledc_isr_register(uint32_t ledc_intr_num, void (*fn)(void*), void * arg) +{ + if(fn == NULL) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + ESP_INTR_DISABLE(ledc_intr_num); + intr_matrix_set(xPortGetCoreID(), ETS_LEDC_INTR_SOURCE, ledc_intr_num); + xt_set_interrupt_handler(ledc_intr_num, fn, arg); + ESP_INTR_ENABLE(ledc_intr_num); + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +esp_err_t ledc_config(ledc_config_t* ledc_conf) +{ + SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN); + CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST); + + uint32_t speed_mode = ledc_conf->speed_mode; + uint32_t gpio_num = ledc_conf->gpio_num; + uint32_t ledc_channel = ledc_conf->channel; + uint32_t freq_hz = ledc_conf->freq_hz; + uint32_t timer_select = ledc_conf->timer_src; + uint32_t duty_depth = ledc_conf->duty_depth; + uint32_t intr_type = ledc_conf->intr_type; + uint32_t duty = ledc_conf->duty; + uint64_t div_param = 0; + uint32_t precision = 0; + if(!ledc_is_valid_channel(ledc_channel)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(gpio_num >= GPIO_NUM_34 || gpio_num == 20 || gpio_num == 24 || gpio_num == 28 || gpio_num == 29 || gpio_num == 30 + || gpio_num == 31) { + LEDC_ERROR("GPIO number error: IO%d\n ", gpio_num); + return ESP_ERR_INVALID_ARG; + } + if(gpio_num >= GPIO_PIN_COUNT || 0 == GPIO_PIN_MUX_REG[gpio_num]) { + LEDC_ERROR("io_num=%d does not exist\n", gpio_num); + return ESP_ERR_INVALID_ARG; + } + if(freq_hz == 0 || duty_depth == 0 || duty_depth > LEDC_DUTY_DEPTH_15_BIT) { + LEDC_ERROR("freq_hz=%u duty_depth=%u\n", div_param, duty_depth); + return ESP_ERR_INVALID_ARG; + } + if(timer_select > LEDC_TIMER3) { + LEDC_ERROR("Time Select %u\n", timer_select); + return ESP_ERR_INVALID_ARG; + } + portENTER_CRITICAL(&ledc_spinlock); + esp_err_t ret = ESP_OK; + /*gpio matrix ledc pwm signal*/ + PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], 2); + gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT); + gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0); + /*configure ledc param*/ + /*calculate the div_param and select which base clock and first we will select the apb_clk */ + precision = (0x1 << duty_depth); //2**depth + div_param = (uint64_t) LEDC_APB_CLK_HZ * 256 / freq_hz / precision; //8bit fragment + /*Fail ,because the div num overflow or too small*/ + if(div_param <= 256 || div_param > LEDC_DIV_NUM_HSTIMER0) { //REF TICK + /*Selet the reference tick*/ + div_param = (uint64_t) LEDC_REF_CLK_HZ * 256 / freq_hz / precision; + if(div_param <= 256 || div_param > LEDC_DIV_NUM_HSTIMER0_V) { + LEDC_ERROR("div param err,div_param=%u\n", div_param); + ret = ESP_FAIL; + } + ledc_timer_config(speed_mode, timer_select, div_param, duty_depth, LEDC_REF_TICK); + ledc_set_channel_timer(speed_mode, ledc_channel, timer_select); + } else { //APB TICK + ledc_timer_config(speed_mode, timer_select, div_param, duty_depth, LEDC_APB_CLK); + ledc_set_channel_timer(speed_mode, ledc_channel, timer_select); + } + ledc_timer_rst(speed_mode, timer_select); + ledc_set_duty(speed_mode, ledc_channel, duty); + ledc_enable_intr_type(speed_mode, ledc_channel, intr_type); + LEDC_INFO("LEDC_PWM CHANNEL %1u|GPIO %02u|FreHz %05u|Duty %04u|Depth %04u|Time %01u|SourceClk %01u|Divparam %u\n", + ledc_channel, gpio_num, freq_hz, duty, duty_depth, timer_select, timer_source_clk_flag, div_param + ); + ledc_update(speed_mode, ledc_channel); + portEXIT_CRITICAL(&ledc_spinlock); + return ret; +} + +esp_err_t ledc_update(ledc_mode_t speed_mode, ledc_channel_t channel) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_channel(channel)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_channel[channel].conf0.sig_out_en = 1; + LEDC.high_speed_channel[channel].conf1.duty_start = 1; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_channel(channel)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + LEDC.high_speed_channel[channel].conf0.idle_lv = idle_level; + LEDC.high_speed_channel[channel].conf0.sig_out_en = 0; + LEDC.high_speed_channel[channel].conf1.duty_start = 0; + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} +esp_err_t ledc_set_fade(ledc_mode_t speed_mode, uint32_t channel, uint32_t duty, ledc_duty_direction_t fade_direction, + uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_channel(channel)) + return ESP_ERR_INVALID_ARG; + if(fade_direction > LEDC_DUTY_DIR_INCREASE) { + LEDC_ERROR("Duty direction err\n"); + return ESP_ERR_INVALID_ARG; + } + if(step_num > 0X3FF || duty_cyle_num > 0X3FF || duty_scale > 0X3FF) { + LEDC_ERROR("step_num=%u duty_cyle_num=%u duty_scale=%u\n", step_num, duty_cyle_num, duty_scale); + return ESP_ERR_INVALID_ARG; + } + portENTER_CRITICAL(&ledc_spinlock); + ledc_duty_config(speed_mode, + channel, //uint32_t chan_num, + 0, //uint32_t hpoint_val, + 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 + ); + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_channel(channel)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + ledc_duty_config(speed_mode, + channel, //uint32_t chan_num, + 0, //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 + ); + portEXIT_CRITICAL(&ledc_spinlock); + return ESP_OK; +} + +uint32_t ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + uint32_t duty = 0; + duty = (LEDC.high_speed_channel[channel].duty_rd.duty_read >> 4); + return duty; +} + +esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t freq_hz) +{ + if(!ledc_is_valid_mode(speed_mode)) + return ESP_ERR_INVALID_ARG; + if(!ledc_is_valid_channel(channel)) + return ESP_ERR_INVALID_ARG; + portENTER_CRITICAL(&ledc_spinlock); + esp_err_t ret = ESP_OK; + uint32_t div_num = 0; + /*Select timer*/ + uint32_t timer_select = LEDC.high_speed_channel[channel].conf0.timer_sel; + /*Get timer limit*/ + uint32_t duty_depth = LEDC.high_speed_timer[timer_select].conf.timer_lim; + uint32_t timer_source_clk = LEDC.high_speed_timer[timer_select].conf.tick_sel; + uint32_t precision = (0x1 << duty_depth); + if(timer_source_clk == LEDC_APB_CLK) { + div_num = (uint64_t) LEDC_APB_CLK_HZ * 256 / freq_hz / precision; + } else { + div_num = (uint64_t) LEDC_REF_CLK_HZ * 256 / freq_hz / precision; + } + if(div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) { + LEDC_ERROR("channel %u,div param err,div_param=%u\n", channel, div_num); + ret = ESP_FAIL; + } + LEDC.high_speed_timer[timer_select].conf.div_num = div_num; + portEXIT_CRITICAL(&ledc_spinlock); + return ret; +} + +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; +}