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Merge branch 'feature/ledc_low_speed_channels' into 'master' 

add ledc low speed channels

1. add low speed channels
2. modify example code.

See merge request !490
pull/264/merge
Ivan Grokhotkov 2017-03-21 15:35:40 +08:00
rodzic 91d35f01f2 7670e93639
commit 9254d2846f
5 zmienionych plików z 274 dodań i 196 usunięć
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35
components/driver/include/driver/ledc.h
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@ -29,8 +29,7 @@ extern "C" {
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_LOW_SPEED_MODE, /*!< LEDC low speed speed_mode */
LEDC_SPEED_MODE_MAX, /*!< LEDC speed limit */
} ledc_mode_t;
@ -137,8 +136,6 @@ esp_err_t ledc_timer_config(ledc_timer_config_t* timer_conf);
* After ledc_set_duty, ledc_set_fade, we need to call this function to update the settings.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode,
* now we only support high-speed mode.
* We will access low-speed mode in next version
* @param channel LEDC channel(0-7), select from ledc_channel_t
*
* @return
@ -152,7 +149,7 @@ esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
* @brief LEDC stop.
* Disable LEDC output, and set idle level
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel(0-7), select from ledc_channel_t
* @param idle_level Set output idle level after LEDC stops.
*
@ -165,7 +162,7 @@ esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idl
/**
* @brief LEDC set channel frequency(Hz)
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_num LEDC timer index(0-3), select from ledc_timer_t
* @param freq_hz Set the LEDC frequency
*
@ -179,7 +176,7 @@ esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t
/**
* @brief LEDC get channel frequency(Hz)
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_num LEDC timer index(0-3), select from ledc_timer_t
*
* @return
@ -192,7 +189,7 @@ uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num);
* @brief LEDC set duty
* Only after calling ledc_update_duty will the duty update.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel(0-7), select from ledc_channel_t
* @param duty Set the LEDC duty, the duty range is [0, (2**bit_num) - 1]
*
@ -205,7 +202,7 @@ esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t
/**
* @brief LEDC get duty
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel(0-7), select from ledc_channel_t
*
* @return
@ -218,7 +215,7 @@ int 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_duty function, the function can take effect.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel(0-7), select from ledc_channel_t
* @param duty Set the start of the gradient duty, the duty range is [0, (2**bit_num) - 1]
* @param gradule_direction Set the direction of the gradient
@ -254,7 +251,7 @@ esp_err_t ledc_isr_register(void (*fn)(void*), void * arg, int intr_alloc_flags,
/**
* @brief Configure LEDC settings
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_sel Timer index(0-3), there are 4 timers in LEDC module
* @param div_num Timer clock divide number, the timer clock is divided from the selected clock source
* @param bit_num The count number of one period, counter range is 0 ~ ((2 ** bit_num) - 1)
@ -269,7 +266,7 @@ esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_
/**
* @brief Reset LEDC timer
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
*
* @return
@ -281,7 +278,7 @@ esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel);
/**
* @brief Pause LEDC timer counter
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
*
* @return
@ -294,7 +291,7 @@ esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel);
/**
* @brief Resume LEDC timer
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
*
* @return
@ -306,7 +303,7 @@ esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel);
/**
* @brief Bind LEDC channel with the selected timer
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel index(0-7), select from ledc_channel_t
* @param timer_idx LEDC timer index(0-3), select from ledc_timer_t
*
@ -321,7 +318,6 @@ esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint
* Call ledc_fade_start() after this to start fading.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode,
* For now we only support high-speed mode. We will access low-speed mode soon.
* @param channel LEDC channel index(0-7), select from ledc_channel_t
* @param target_duty Target duty of fading.( 0 - (2 ** bit_num - 1)))
* @param scale Controls the increase or decrease step scale.
@ -331,6 +327,7 @@ esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_OK Success
* - ESP_ERR_INVALID_STATE Fade function not installed.
* - ESP_FAIL Fade function init error
*/
esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int scale, int cycle_num);
@ -339,7 +336,6 @@ esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel
* Call ledc_fade_start() after this to start fading.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode,
* For now we only support high-speed mode. We will access low-speed mode soon.
* @param channel LEDC channel index(0-7), select from ledc_channel_t
* @param target_duty Target duty of fading.( 0 - (2 ** bit_num - 1)))
* @param max_fade_time_ms The maximum time of the fading ( ms ).
@ -348,6 +344,7 @@ esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_OK Success
* - ESP_ERR_INVALID_STATE Fade function not installed.
* - ESP_FAIL Fade function init error
*/
esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int max_fade_time_ms);
@ -358,7 +355,6 @@ esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel
* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
*
* @return
* - ESP_ERR_NO_MEM No enough memory
* - ESP_OK Success
* - ESP_ERR_INVALID_STATE Fade function already installed.
*/
@ -373,6 +369,7 @@ void ledc_fade_func_uninstall();
/**
* @brief Start LEDC fading.
*
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode
* @param channel LEDC channel number
* @param wait_done Whether to block until fading done.
*
@ -381,7 +378,7 @@ void ledc_fade_func_uninstall();
* - ESP_ERR_INVALID_STATE Fade function not installed.
* - ESP_ERR_INVALID_ARG Parameter error.
*/
esp_err_t ledc_fade_start(ledc_channel_t channel, ledc_fade_mode_t wait_done);
esp_err_t ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t wait_done);
#ifdef __cplusplus
}

246
components/driver/ledc.c
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@ -41,7 +41,8 @@ typedef struct {
xSemaphoreHandle ledc_fade_sem;
xSemaphoreHandle ledc_fade_mux;
} ledc_fade_t;
static ledc_fade_t* s_ledc_fade_rec = NULL;
static ledc_fade_t *s_ledc_fade_rec[LEDC_SPEED_MODE_MAX][LEDC_CHANNEL_MAX];
static ledc_isr_handle_t s_ledc_fade_isr_handle = NULL;
#define LEDC_VAL_NO_CHANGE (-1)
@ -57,9 +58,24 @@ static ledc_isr_handle_t s_ledc_fade_isr_handle = NULL;
#define LEDC_FADE_TARGET_ERR_STR "LEDC fade target duty error"
#define LEDC_FADE_INSTALLED_ERR_STR "LEDC fade service already installed"
#define LEDC_FADE_MODE_ERR_STR "LEDC fade mode error"
#define LEDC_FADE_INIT_ERROR_STR "LEDC fade channel init error"
static void ledc_ls_timer_update(ledc_mode_t speed_mode, ledc_timer_t timer_sel)
{
if (speed_mode == LEDC_LOW_SPEED_MODE) {
LEDC.timer_group[speed_mode].timer[timer_sel].conf.low_speed_update = 1;
}
}
esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_t div_num, uint32_t bit_num, ledc_clk_src_t clk_src)
static IRAM_ATTR void ledc_ls_channel_update(ledc_mode_t speed_mode, ledc_channel_t channel_num)
{
if (speed_mode == LEDC_LOW_SPEED_MODE) {
LEDC.channel_group[speed_mode].channel[channel_num].conf0.low_speed_update = 1;
}
}
esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_t div_num, uint32_t bit_num,
ledc_clk_src_t clk_src)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
@ -67,9 +83,7 @@ esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_
LEDC.timer_group[speed_mode].timer[timer_sel].conf.div_num = div_num;
LEDC.timer_group[speed_mode].timer[timer_sel].conf.tick_sel = clk_src;
LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num = bit_num;
if (speed_mode != LEDC_HIGH_SPEED_MODE) {
LEDC.timer_group[speed_mode].timer[timer_sel].conf.low_speed_update = 1;
}
ledc_ls_timer_update(speed_mode, timer_sel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -86,6 +100,7 @@ static IRAM_ATTR esp_err_t ledc_duty_config(ledc_mode_t speed_mode, ledc_channel
((duty_num & LEDC_DUTY_NUM_HSCH0_V) << LEDC_DUTY_NUM_HSCH0_S) |
((duty_cycle & LEDC_DUTY_CYCLE_HSCH0_V) << LEDC_DUTY_CYCLE_HSCH0_S) |
((duty_scale & LEDC_DUTY_SCALE_HSCH0_V) << LEDC_DUTY_SCALE_HSCH0_S);
ledc_ls_channel_update(speed_mode, channel_num);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -96,6 +111,7 @@ esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel
LEDC_CHECK(timer_idx <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&ledc_spinlock);
LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel = timer_idx;
ledc_ls_channel_update(speed_mode, channel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -107,6 +123,7 @@ esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel)
portENTER_CRITICAL(&ledc_spinlock);
LEDC.timer_group[speed_mode].timer[timer_sel].conf.rst = 1;
LEDC.timer_group[speed_mode].timer[timer_sel].conf.rst = 0;
ledc_ls_timer_update(speed_mode, timer_sel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -117,6 +134,7 @@ esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel)
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&ledc_spinlock);
LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 1;
ledc_ls_timer_update(speed_mode, timer_sel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -127,6 +145,7 @@ esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel)
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&ledc_spinlock);
LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 0;
ledc_ls_timer_update(speed_mode, timer_sel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -138,10 +157,14 @@ static esp_err_t ledc_enable_intr_type(ledc_mode_t speed_mode, uint32_t channel,
uint32_t intr_type = type;
portENTER_CRITICAL(&ledc_spinlock);
value = LEDC.int_ena.val;
uint8_t int_en_base = LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S;
if (speed_mode == LEDC_LOW_SPEED_MODE) {
int_en_base = LEDC_DUTY_CHNG_END_LSCH0_INT_ENA_S;
}
if (intr_type == LEDC_INTR_FADE_END) {
LEDC.int_ena.val = value | BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel);
LEDC.int_ena.val = value | BIT(int_en_base + channel);
} else {
LEDC.int_ena.val = ( value & ( ~( BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel) ) ) );
LEDC.int_ena.val = (value & (~(BIT(int_en_base + channel))));
}
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
@ -188,12 +211,17 @@ esp_err_t ledc_timer_config(ledc_timer_config_t* timer_conf)
if (div_param > LEDC_DIV_NUM_HSTIMER0_V) {
// APB_CLK results in divisor which too high. Try using REF_TICK as clock source.
timer_clk_src = LEDC_REF_TICK;
div_param = ( (uint64_t) LEDC_REF_CLK_HZ << 8 ) / freq_hz / precision;
div_param = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
if (div_param < 256 || div_param > LEDC_DIV_NUM_HSTIMER0_V) {
ESP_LOGE(LEDC_TAG, "requested frequency and bit depth can not be achieved, try increasing freq_hz or bit_num. div_param=%d",
(uint32_t ) div_param);
ret = ESP_FAIL;
}
} else {
if (speed_mode == LEDC_LOW_SPEED_MODE) {
//for now, we only select 80mhz for slow clk of LEDC low speed channels.
LEDC.conf.slow_clk_sel = 1;
}
}
// set timer parameters
ledc_timer_set(speed_mode, timer_num, div_param, bit_num, timer_clk_src);
@ -212,8 +240,7 @@ esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc
if (speed_mode == LEDC_HIGH_SPEED_MODE) {
gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
} else {
ESP_LOGE(LEDC_TAG, "low speed mode is not implemented");
return ESP_ERR_NOT_SUPPORTED;
gpio_matrix_out(gpio_num, LEDC_LS_SIG_OUT0_IDX + ledc_channel, 0, 0);
}
return ESP_OK;
}
@ -248,7 +275,11 @@ esp_err_t ledc_channel_config(ledc_channel_config_t* ledc_conf)
/*set LEDC signal in gpio matrix*/
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
if (speed_mode == LEDC_HIGH_SPEED_MODE) {
gpio_matrix_out(gpio_num, LEDC_HS_SIG_OUT0_IDX + ledc_channel, 0, 0);
} else {
gpio_matrix_out(gpio_num, LEDC_LS_SIG_OUT0_IDX + ledc_channel, 0, 0);
}
return ret;
}
@ -259,6 +290,7 @@ esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
portENTER_CRITICAL(&ledc_spinlock);
LEDC.channel_group[speed_mode].channel[channel].conf0.sig_out_en = 1;
LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 1;
ledc_ls_channel_update(speed_mode, channel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -271,6 +303,7 @@ esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idl
LEDC.channel_group[speed_mode].channel[channel].conf0.idle_lv = idle_level & 0x1;
LEDC.channel_group[speed_mode].channel[channel].conf0.sig_out_en = 0;
LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 0;
ledc_ls_channel_update(speed_mode, channel);
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
@ -285,7 +318,7 @@ esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t
ESP_LOGE(LEDC_TAG, "step_num=%u duty_cyle_num=%u duty_scale=%u", step_num, duty_cyle_num, duty_scale);
return ESP_ERR_INVALID_ARG;
}
if (s_ledc_fade_rec) {
if (s_ledc_fade_rec[speed_mode][channel]) {
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
}
ledc_duty_config(speed_mode,
@ -304,7 +337,7 @@ esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
if (s_ledc_fade_rec) {
if (s_ledc_fade_rec[speed_mode][channel]) {
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
}
ledc_duty_config(speed_mode,
@ -334,11 +367,11 @@ esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t
uint32_t div_num = 0;
uint32_t bit_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.bit_num;
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
uint32_t precision = ( 0x1 << bit_num );
uint32_t precision = (0x1 << bit_num);
if (timer_source_clk == LEDC_APB_CLK) {
div_num = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / freq_hz / precision;
div_num = ((uint64_t) LEDC_APB_CLK_HZ << 8) / freq_hz / precision;
} else {
div_num = ( (uint64_t) LEDC_REF_CLK_HZ << 8 ) / freq_hz / precision;
div_num = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
}
if (div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) {
ESP_LOGE(LEDC_TAG, "div param err,div_param=%u", div_num);
@ -351,81 +384,127 @@ esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t
uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ( 0 ));
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, (0));
portENTER_CRITICAL(&ledc_spinlock);
uint32_t freq = 0;
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
uint32_t bit_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.bit_num;
uint32_t div_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.div_num;
uint32_t precision = ( 0x1 << bit_num );
uint32_t precision = (0x1 << bit_num);
if (timer_source_clk == LEDC_APB_CLK) {
freq = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / precision / div_num;
freq = ((uint64_t) LEDC_APB_CLK_HZ << 8) / precision / div_num;
} else {
freq = ( (uint64_t) LEDC_REF_CLK_HZ << 8 ) / precision / div_num;
freq = ((uint64_t) LEDC_REF_CLK_HZ << 8) / precision / div_num;
}
portEXIT_CRITICAL(&ledc_spinlock);
return freq;
}
void IRAM_ATTR ledc_fade_isr()
void IRAM_ATTR ledc_fade_isr(void* arg)
{
int i;
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.
for (i = 0; i < 8; i++) {
if (intr_status & BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ST_S + i)) {
int speed_mode = s_ledc_fade_rec[i].speed_mode;
int duty_cur = LEDC.channel_group[speed_mode].channel[i].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
if (duty_cur == s_ledc_fade_rec[i].target_duty) {
if(s_ledc_fade_rec[i].mode == LEDC_FADE_WAIT_DONE) {
xSemaphoreGiveFromISR(s_ledc_fade_rec[i].ledc_fade_sem, &HPTaskAwoken);
if(HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR() ;
int speed_mode = LEDC_HIGH_SPEED_MODE;
for (channel = 0; channel < LEDC_CHANNEL_MAX; channel++) {
if (intr_status & (BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ST_S + channel) | BIT(LEDC_DUTY_CHNG_END_LSCH0_INT_ST_S + channel))) {
if (intr_status & BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ST_S + channel)) {
speed_mode = LEDC_HIGH_SPEED_MODE;
} else {
speed_mode = LEDC_LOW_SPEED_MODE;
}
if (s_ledc_fade_rec[speed_mode][channel] == NULL) {
//fade object not initialized yet.
continue;
}
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
if (duty_cur == s_ledc_fade_rec[speed_mode][channel]->target_duty) {
if (s_ledc_fade_rec[speed_mode][channel]->mode == LEDC_FADE_WAIT_DONE) {
xSemaphoreGiveFromISR(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, &HPTaskAwoken);
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
}
continue;
}
int duty_tar = s_ledc_fade_rec[i].target_duty;
int scale = s_ledc_fade_rec[i].scale;
int duty_tar = s_ledc_fade_rec[speed_mode][channel]->target_duty;
int scale = s_ledc_fade_rec[speed_mode][channel]->scale;
if (scale == 0) {
continue;
}
int cycle = s_ledc_fade_rec[i].cycle_num;
int delta = s_ledc_fade_rec[i].direction == LEDC_DUTY_DIR_DECREASE ? duty_cur - duty_tar : duty_tar - duty_cur;
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,
i,
channel,
LEDC_VAL_NO_CHANGE,
duty_cur << LEDC_DUTY_DECIMAL_BIT_NUM,
s_ledc_fade_rec[i].direction,
s_ledc_fade_rec[speed_mode][channel]->direction,
step,
cycle,
scale);
} else {
ledc_duty_config(
speed_mode,
i,
channel,
LEDC_VAL_NO_CHANGE,
duty_tar << LEDC_DUTY_DECIMAL_BIT_NUM,
s_ledc_fade_rec[i].direction,
s_ledc_fade_rec[speed_mode][channel]->direction,
1,
1,
0);
}
LEDC.channel_group[speed_mode].channel[i].conf1.duty_start = 1;
LEDC.channel_group[speed_mode].channel[channel].conf1.duty_start = 1;
}
}
LEDC.int_clr.val = intr_status; //clear LEDC interrupt status.
}
static esp_err_t ledc_fade_channel_deinit(ledc_mode_t speed_mode, ledc_channel_t channel)
{
if (s_ledc_fade_rec[speed_mode][channel]) {
if (s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux) {
vSemaphoreDelete(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux);
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux = NULL;
}
if (s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem) {
vSemaphoreDelete(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem);
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem = NULL;
}
free(s_ledc_fade_rec[speed_mode][channel]);
s_ledc_fade_rec[speed_mode][channel] = NULL;
}
return ESP_OK;
}
static esp_err_t ledc_fade_channel_init_check(ledc_mode_t speed_mode, ledc_channel_t channel)
{
if (s_ledc_fade_rec[speed_mode][channel] == NULL) {
s_ledc_fade_rec[speed_mode][channel] = (ledc_fade_t *) calloc(1, sizeof(ledc_fade_t));
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux = xSemaphoreCreateMutex();
s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem = xSemaphoreCreateBinary();
}
if (s_ledc_fade_rec[speed_mode][channel]
&& s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux
&& s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem) {
return ESP_OK;
} else {
ledc_fade_channel_deinit(speed_mode, channel);
return ESP_FAIL;
}
}
esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int max_fade_time_ms)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel < LEDC_CHANNEL_MAX, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
int max_duty = ( 1 << ( LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num ) ) - 1;
int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num)) - 1;
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
uint32_t freq = ledc_get_freq(speed_mode, timer_sel);
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
@ -441,16 +520,17 @@ esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel
cycle_num = total_cycles / duty_delta;
} else {
cycle_num = 1;
scale = ( duty_delta + total_cycles - 1 ) / total_cycles;
scale = (duty_delta + total_cycles - 1) / total_cycles;
}
return ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
}
esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int scale, int cycle_num)
{
LEDC_CHECK(s_ledc_fade_rec != NULL, LEDC_FADE_SERVICE_ERR_STR, ESP_ERR_INVALID_STATE);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel < LEDC_CHANNEL_MAX, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(ledc_fade_channel_init_check(speed_mode, channel) == ESP_OK , LEDC_FADE_INIT_ERROR_STR, ESP_FAIL);
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num)) - 1;
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
@ -463,18 +543,18 @@ esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel
if (duty_delta == 0) {
return ESP_OK;
}
s_ledc_fade_rec[channel].speed_mode = speed_mode;
s_ledc_fade_rec[channel].target_duty = target_duty;
s_ledc_fade_rec[channel].cycle_num = cycle_num;
s_ledc_fade_rec[channel].scale = scale;
s_ledc_fade_rec[speed_mode][channel]->speed_mode = speed_mode;
s_ledc_fade_rec[speed_mode][channel]->target_duty = target_duty;
s_ledc_fade_rec[speed_mode][channel]->cycle_num = cycle_num;
s_ledc_fade_rec[speed_mode][channel]->scale = scale;
int step_num;
if (duty_cur > target_duty) {
s_ledc_fade_rec[channel].direction = LEDC_DUTY_DIR_DECREASE;
step_num = ( duty_cur - target_duty ) / scale;
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[channel].direction = LEDC_DUTY_DIR_INCREASE;
step_num = ( target_duty - duty_cur ) / scale;
s_ledc_fade_rec[speed_mode][channel]->direction = LEDC_DUTY_DIR_INCREASE;
step_num = (target_duty - duty_cur) / scale;
step_num = step_num > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : step_num;
}
portEXIT_CRITICAL(&ledc_spinlock);
@ -483,42 +563,28 @@ esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel
speed_mode,
channel,
duty_cur,
s_ledc_fade_rec[channel].direction,
s_ledc_fade_rec[speed_mode][channel]->direction,
step_num,
s_ledc_fade_rec[channel].cycle_num,
s_ledc_fade_rec[channel].scale
s_ledc_fade_rec[speed_mode][channel]->cycle_num,
s_ledc_fade_rec[speed_mode][channel]->scale
);
ESP_LOGD(LEDC_TAG, "cur duty: %d; target: %d, step: %d, cycle: %d; scale: %d\n",
LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM,
target_duty,
step_num,
s_ledc_fade_rec[channel].cycle_num,
s_ledc_fade_rec[channel].scale
s_ledc_fade_rec[speed_mode][channel]->cycle_num,
s_ledc_fade_rec[speed_mode][channel]->scale
);
LEDC.int_clr.val |= BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel);
int bit_num_ch0 = (speed_mode == LEDC_HIGH_SPEED_MODE) ? LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S : LEDC_DUTY_CHNG_END_LSCH0_INT_ENA_S;
LEDC.int_clr.val |= BIT(bit_num_ch0 + channel);
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_FADE_END);
return ESP_OK;
}
esp_err_t ledc_fade_func_install(int intr_alloc_flags)
{
LEDC_CHECK(s_ledc_fade_rec == NULL, LEDC_FADE_INSTALLED_ERR_STR, ESP_ERR_INVALID_STATE);
s_ledc_fade_rec = (ledc_fade_t*) calloc(LEDC_CHANNEL_MAX, sizeof(ledc_fade_t));
if (s_ledc_fade_rec == NULL) {
return ESP_ERR_NO_MEM;
}
int i = 0;
for (i = 0; i < LEDC_CHANNEL_MAX; i++) {
s_ledc_fade_rec[i].ledc_fade_sem = xSemaphoreCreateBinary();
s_ledc_fade_rec[i].ledc_fade_mux = xSemaphoreCreateMutex();
if (s_ledc_fade_rec[i].ledc_fade_sem == NULL || s_ledc_fade_rec[i].ledc_fade_mux == NULL) {
ledc_fade_func_uninstall();
return ESP_ERR_NO_MEM;
}
}
//OR intr_alloc_flags with ESP_INTR_FLAG_IRAM because the fade isr is in IRAM
ledc_isr_register(ledc_fade_isr, NULL, intr_alloc_flags | ESP_INTR_FLAG_IRAM, &s_ledc_fade_isr_handle);
return ESP_OK;
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()
@ -526,42 +592,32 @@ void ledc_fade_func_uninstall()
if (s_ledc_fade_rec == NULL) {
return;
}
if(s_ledc_fade_isr_handle) {
if (s_ledc_fade_isr_handle) {
esp_intr_free(s_ledc_fade_isr_handle);
s_ledc_fade_isr_handle = NULL;
}
int i;
for (i = 0; i < LEDC_CHANNEL_MAX; i++) {
if (s_ledc_fade_rec[i].ledc_fade_sem) {
xSemaphoreHandle sem_tmp = s_ledc_fade_rec[i].ledc_fade_sem;
s_ledc_fade_rec[i].ledc_fade_sem = NULL;
vSemaphoreDelete(sem_tmp);
}
if (s_ledc_fade_rec[i].ledc_fade_mux) {
xSemaphoreHandle mux_tmp = s_ledc_fade_rec[i].ledc_fade_mux;
s_ledc_fade_rec[i].ledc_fade_mux = NULL;
vSemaphoreDelete(mux_tmp);
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);
}
}
free(s_ledc_fade_rec);
s_ledc_fade_rec = NULL;
return;
}
esp_err_t ledc_fade_start(ledc_channel_t channel, ledc_fade_mode_t wait_done)
esp_err_t ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t wait_done)
{
LEDC_CHECK(s_ledc_fade_rec != NULL, LEDC_FADE_SERVICE_ERR_STR, ESP_ERR_INVALID_STATE);
LEDC_CHECK(wait_done < LEDC_FADE_MAX, LEDC_FADE_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
int speed_mode = s_ledc_fade_rec[channel].speed_mode;
xSemaphoreTake(s_ledc_fade_rec[channel].ledc_fade_mux, portMAX_DELAY);
xSemaphoreTake(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux, portMAX_DELAY);
if (wait_done == LEDC_FADE_WAIT_DONE) {
s_ledc_fade_rec[channel].mode = LEDC_FADE_WAIT_DONE;
s_ledc_fade_rec[speed_mode][channel]->mode = LEDC_FADE_WAIT_DONE;
ledc_update_duty(speed_mode, channel);
xSemaphoreTake(s_ledc_fade_rec[channel].ledc_fade_sem, portMAX_DELAY);
xSemaphoreTake(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_sem, portMAX_DELAY);
} else {
s_ledc_fade_rec[channel].mode = LEDC_FADE_NO_WAIT;
s_ledc_fade_rec[speed_mode][channel]->mode = LEDC_FADE_NO_WAIT;
ledc_update_duty(speed_mode, channel);
}
xSemaphoreGive(s_ledc_fade_rec[channel].ledc_fade_mux);
xSemaphoreGive(s_ledc_fade_rec[speed_mode][channel]->ledc_fade_mux);
return ESP_OK;
}

9
components/esp32/include/soc/ledc_struct.h
Wyświetl plik

@ -21,7 +21,8 @@ typedef volatile struct {
uint32_t timer_sel: 2; /*There are four high speed timers the two bits are used to select one of them for high speed channel. 2'b00: seletc hstimer0. 2'b01: select hstimer1. 2'b10: select hstimer2. 2'b11: select hstimer3.*/
uint32_t sig_out_en: 1; /*This is the output enable control bit for high speed channel*/
uint32_t idle_lv: 1; /*This bit is used to control the output value when high speed channel is off.*/
uint32_t reserved4: 27;
uint32_t low_speed_update: 1; /*This bit is only useful for low speed timer channels, reserved for high speed timers*/
uint32_t reserved4: 26;
uint32_t clk_en: 1; /*This bit is clock gating control signal. when software configure LED_PWM internal registers it controls the register clock.*/
};
uint32_t val;
@ -204,9 +205,13 @@ typedef volatile struct {
} int_clr;
union {
struct {
uint32_t apb_clk_sel: 1; /*This bit is used to set the frequency of slow_clk. 1'b1:80mhz 1'b0:8mhz*/
uint32_t apb_clk_sel: 1; /*This bit decides the slow clock for LEDC low speed channels, so we want to replace the field name with slow_clk_sel*/
uint32_t reserved1: 31;
};
struct {
uint32_t slow_clk_sel: 1; /*This bit is used to set the frequency of slow_clk. 1'b1:80mhz 1'b0:8mhz, (only used by LEDC low speed channels/timers)*/
uint32_t reserved: 31;
};
uint32_t val;
} conf;
uint32_t reserved_194;

1
examples/peripherals/ledc/README.md
Wyświetl plik

@ -14,3 +14,4 @@
* This example use GPIO18/19/4/5 as LEDC ouput, and it will change the duty repeatedly.
* GPIO18/19 are from high speed channel group. GPIO4/5 are from low speed channel group.

179
examples/peripherals/ledc/main/ledc_fade.c
Wyświetl plik

@ -27,105 +27,124 @@
*
* 4. This example use GPIO18/19/4/5 as LEDC ouput, and it will change the duty repeatedly.
*
* 5. GPIO18/19 are from high speed channel group. GPIO4/5 are from low speed channel group.
*
*/
#define LEDC_HS_TIMER LEDC_TIMER_0
#define LEDC_HS_MODE LEDC_HIGH_SPEED_MODE
#define LEDC_HS_CH0_GPIO (18)
#define LEDC_HS_CH0_CHANNEL LEDC_CHANNEL_0
#define LEDC_HS_CH1_GPIO (19)
#define LEDC_HS_CH1_CHANNEL LEDC_CHANNEL_1
#define LEDC_IO_0 (18)
#define LEDC_IO_1 (19)
#define LEDC_IO_2 (4)
#define LEDC_IO_3 (5)
#define LEDC_LS_TIMER LEDC_TIMER_1
#define LEDC_LS_MODE LEDC_LOW_SPEED_MODE
#define LEDC_LS_CH2_GPIO (4)
#define LEDC_LS_CH2_CHANNEL LEDC_CHANNEL_2
#define LEDC_LS_CH3_GPIO (5)
#define LEDC_LS_CH3_CHANNEL LEDC_CHANNEL_3
esp_err_t app_main()
{
ledc_timer_config_t ledc_timer = {
//set timer counter bit number
.bit_num = LEDC_TIMER_13_BIT,
//set frequency of pwm
.freq_hz = 5000,
//timer mode,
.speed_mode = LEDC_HIGH_SPEED_MODE,
//timer index
.timer_num = LEDC_TIMER_0
#define LEDC_TEST_CH_NUM (4)
typedef struct {
int channel;
int io;
int mode;
int timer_idx;
} ledc_info_t;
void app_main()
{
int ch;
ledc_info_t ledc_ch[LEDC_TEST_CH_NUM] = {
{
.channel = LEDC_HS_CH0_CHANNEL,
.io = LEDC_HS_CH0_GPIO,
.mode = LEDC_HS_MODE,
.timer_idx = LEDC_HS_TIMER
},
{
.channel = LEDC_HS_CH1_CHANNEL,
.io = LEDC_HS_CH1_GPIO,
.mode = LEDC_HS_MODE,
.timer_idx = LEDC_HS_TIMER
},
{
.channel = LEDC_LS_CH2_CHANNEL,
.io = LEDC_LS_CH2_GPIO,
.mode = LEDC_LS_MODE,
.timer_idx = LEDC_LS_TIMER
},
{
.channel = LEDC_LS_CH3_CHANNEL,
.io = LEDC_LS_CH3_GPIO,
.mode = LEDC_LS_MODE,
.timer_idx = LEDC_LS_TIMER
}
};
ledc_timer_config_t ledc_timer = {
.bit_num = LEDC_TIMER_13_BIT, //set timer counter bit number
.freq_hz = 5000, //set frequency of pwm
.speed_mode = LEDC_HS_MODE, //timer mode,
.timer_num = LEDC_HS_TIMER //timer index
};
//configure timer0 for high speed channels
ledc_timer_config(&ledc_timer);
ledc_channel_config_t ledc_channel = {
//set LEDC channel 0
.channel = LEDC_CHANNEL_0,
//set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
.duty = 100,
//GPIO number
.gpio_num = LEDC_IO_0,
//GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
.intr_type = LEDC_INTR_FADE_END,
//set LEDC mode, from ledc_mode_t
.speed_mode = LEDC_HIGH_SPEED_MODE,
//set LEDC timer source, if different channel use one timer,
//the frequency and bit_num of these channels should be the same
.timer_sel = LEDC_TIMER_0
};
//set the configuration
ledc_channel_config(&ledc_channel);
//configure timer1 for low speed channels
ledc_timer.speed_mode = LEDC_LS_MODE;
ledc_timer.timer_num = LEDC_LS_TIMER;
ledc_timer_config(&ledc_timer);
//config ledc channel1
ledc_channel.channel = LEDC_CHANNEL_1;
ledc_channel.gpio_num = LEDC_IO_1;
ledc_channel_config(&ledc_channel);
//config ledc channel2
ledc_channel.channel = LEDC_CHANNEL_2;
ledc_channel.gpio_num = LEDC_IO_2;
ledc_channel_config(&ledc_channel);
//config ledc channel3
ledc_channel.channel = LEDC_CHANNEL_3;
ledc_channel.gpio_num = LEDC_IO_3;
ledc_channel_config(&ledc_channel);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_channel_config_t ledc_channel = {
//set LEDC channel 0
.channel = ledc_ch[ch].channel,
//set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
.duty = 0,
//GPIO number
.gpio_num = ledc_ch[ch].io,
//GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
.intr_type = LEDC_INTR_FADE_END,
//set LEDC mode, from ledc_mode_t
.speed_mode = ledc_ch[ch].mode,
//set LEDC timer source, if different channel use one timer,
//the frequency and bit_num of these channels should be the same
.timer_sel = ledc_ch[ch].timer_idx,
};
//set the configuration
ledc_channel_config(&ledc_channel);
}
//initialize fade service.
ledc_fade_func_install(0);
while(1) {
while (1) {
printf("LEDC fade up\n");
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000, 2000);
ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_fade_with_time(ledc_ch[ch].mode, ledc_ch[ch].channel, 4000, 2000);
ledc_fade_start(ledc_ch[ch].mode, ledc_ch[ch].channel, LEDC_FADE_NO_WAIT);
}
vTaskDelay(3000 / portTICK_PERIOD_MS);
printf("LEDC fade down\n");
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 100, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 300, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 500, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 700, 2000);
ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_fade_with_time(ledc_ch[ch].mode, ledc_ch[ch].channel, 0, 2000);
ledc_fade_start(ledc_ch[ch].mode, ledc_ch[ch].channel, LEDC_FADE_NO_WAIT);
}
vTaskDelay(3000 / portTICK_PERIOD_MS);
printf("LEDC set duty without fade\n");
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
vTaskDelay(2000 / portTICK_PERIOD_MS);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_duty(ledc_ch[ch].mode, ledc_ch[ch].channel, 2000);
ledc_update_duty(ledc_ch[ch].mode, ledc_ch[ch].channel);
}
vTaskDelay(1000 / portTICK_PERIOD_MS);
printf("LEDC set duty without fade\n");
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
vTaskDelay(2000 / portTICK_PERIOD_MS);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_duty(ledc_ch[ch].mode, ledc_ch[ch].channel, 0);
ledc_update_duty(ledc_ch[ch].mode, ledc_ch[ch].channel);
}
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}