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driver: ledc - update fading functions, add example and doc

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1. add fading functions.
2. clear up ledc.c and ledc.h
3. update api doc.
4. add ledc example
5. edit ledc.rst and add readme for example code.
6. add s_ prefix for static global values.
7. add mutex for fade functions
8. minor changes according to the comments.
This commit is contained in:
Wangjialin
2016-12-25 23:11:24 +08:00
parent 3cfe738fcf
commit 6b5e734901
7 changed files with 596 additions and 217 deletions
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355
components/driver/ledc.c
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@@ -19,6 +19,8 @@
#include "freertos/xtensa_api.h"
#include "soc/gpio_sig_map.h"
#include "driver/ledc.h"
#include "soc/ledc_reg.h"
#include "soc/ledc_struct.h"
#include "esp_log.h"
static const char* LEDC_TAG = "ledc";
@@ -29,26 +31,56 @@ static portMUX_TYPE ledc_spinlock = portMUX_INITIALIZER_UNLOCKED;
return (ret_val); \
}
typedef struct {
uint16_t speed_mode;
uint16_t direction;
int target_duty;
int cycle_num;
int scale;
ledc_fade_mode_t mode;
xSemaphoreHandle ledc_fade_sem;
xSemaphoreHandle ledc_fade_mux;
} ledc_fade_t;
static ledc_fade_t* s_ledc_fade_rec = NULL;
static ledc_isr_handle_t s_ledc_fade_isr_handle = NULL;
#define LEDC_VAL_NO_CHANGE (-1)
#define LEDC_STEP_NUM_MAX (1023)
#define LEDC_DUTY_DECIMAL_BIT_NUM (4)
#define LEDC_MODE_ERR_STR "LEDC mode error"
#define LEDC_TIMER_ERR_STR "LEDC timer error"
#define LEDC_CHANNEL_ERR_STR "LEDC channel error"
#define LEDC_GPIO_OUT_ERR_STR "LEDC GPIO output number error"
#define LEDC_FADE_DIR_ERR_STR "LEDC fade direction error"
#define LEDC_FADE_SERVICE_ERR_STR "LEDC fade service not installed"
#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"
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 error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
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);
portENTER_CRITICAL(&ledc_spinlock);
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) {
if (speed_mode != LEDC_HIGH_SPEED_MODE) {
LEDC.timer_group[speed_mode].timer[timer_sel].conf.low_speed_update = 1;
}
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
static esp_err_t ledc_duty_config(ledc_mode_t speed_mode, ledc_channel_t channel_num, uint32_t hpoint_val, uint32_t duty_val,
static IRAM_ATTR esp_err_t ledc_duty_config(ledc_mode_t speed_mode, ledc_channel_t channel_num, int hpoint_val, uint32_t duty_val,
uint32_t duty_direction, uint32_t duty_num, uint32_t duty_cycle, uint32_t duty_scale)
{
portENTER_CRITICAL(&ledc_spinlock);
LEDC.channel_group[speed_mode].channel[channel_num].hpoint.hpoint = hpoint_val;
if (hpoint_val >= 0) {
LEDC.channel_group[speed_mode].channel[channel_num].hpoint.hpoint = hpoint_val;
}
LEDC.channel_group[speed_mode].channel[channel_num].duty.duty = duty_val;
LEDC.channel_group[speed_mode].channel[channel_num].conf1.val = ((duty_direction & LEDC_DUTY_INC_HSCH0_V) << LEDC_DUTY_INC_HSCH0_S) |
((duty_num & LEDC_DUTY_NUM_HSCH0_V) << LEDC_DUTY_NUM_HSCH0_S) |
@@ -60,8 +92,8 @@ static esp_err_t ledc_duty_config(ledc_mode_t speed_mode, ledc_channel_t channel
esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t timer_idx)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_idx <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
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;
portEXIT_CRITICAL(&ledc_spinlock);
@@ -70,8 +102,8 @@ esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel
esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
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);
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;
@@ -81,8 +113,8 @@ esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel)
esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
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);
portENTER_CRITICAL(&ledc_spinlock);
LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 1;
portEXIT_CRITICAL(&ledc_spinlock);
@@ -91,8 +123,8 @@ esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel)
esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_sel <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
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);
portENTER_CRITICAL(&ledc_spinlock);
LEDC.timer_group[speed_mode].timer[timer_sel].conf.pause = 0;
portEXIT_CRITICAL(&ledc_spinlock);
@@ -101,15 +133,15 @@ esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel)
static esp_err_t ledc_enable_intr_type(ledc_mode_t speed_mode, uint32_t channel, ledc_intr_type_t type)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, 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) {
if (intr_type == LEDC_INTR_FADE_END) {
LEDC.int_ena.val = value | BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel);
} else {
LEDC.int_ena.val = (value & (~(BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel))));
LEDC.int_ena.val = ( value & ( ~( BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + channel) ) ) );
}
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
@@ -120,7 +152,7 @@ esp_err_t ledc_isr_register(void (*fn)(void*), void * arg, int intr_alloc_flags,
esp_err_t ret;
LEDC_CHECK(fn, "ledc isr null", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&ledc_spinlock);
ret=esp_intr_alloc(ETS_LEDC_INTR_SOURCE, intr_alloc_flags, fn, arg, handle);
ret = esp_intr_alloc(ETS_LEDC_INTR_SOURCE, intr_alloc_flags, fn, arg, handle);
portEXIT_CRITICAL(&ledc_spinlock);
return ret;
}
@@ -131,32 +163,35 @@ esp_err_t ledc_timer_config(ledc_timer_config_t* timer_conf)
int bit_num = timer_conf->bit_num;
int timer_num = timer_conf->timer_num;
int speed_mode = timer_conf->speed_mode;
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
if(freq_hz == 0 || bit_num == 0 || bit_num > LEDC_TIMER_15_BIT) {
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
periph_module_enable(PERIPH_LEDC_MODULE);
if (freq_hz == 0 || bit_num == 0 || bit_num > LEDC_TIMER_15_BIT) {
ESP_LOGE(LEDC_TAG, "freq_hz=%u bit_num=%u", freq_hz, bit_num);
return ESP_ERR_INVALID_ARG;
}
if(timer_num > LEDC_TIMER_3) {
if (timer_num > LEDC_TIMER_3) {
ESP_LOGE(LEDC_TAG, "invalid timer #%u", timer_num);
return ESP_ERR_INVALID_ARG;
}
esp_err_t ret = ESP_OK;
uint32_t precision = (0x1 << bit_num); // 2**depth
uint32_t precision = ( 0x1 << bit_num ); // 2**depth
// Try calculating divisor based on LEDC_APB_CLK
ledc_clk_src_t timer_clk_src = LEDC_APB_CLK;
// div_param is a Q10.8 fixed point value
uint64_t div_param = ((uint64_t) LEDC_APB_CLK_HZ << 8) / freq_hz / precision;
uint64_t div_param = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / freq_hz / precision;
if (div_param < 256) {
// divisor is too low
ESP_LOGE(LEDC_TAG, "requested frequency and bit depth can not be achieved, try reducing freq_hz or bit_num. div_param=%d", (uint32_t) div_param);
ESP_LOGE(LEDC_TAG, "requested frequency and bit depth can not be achieved, try reducing freq_hz or bit_num. div_param=%d",
(uint32_t ) div_param);
ret = ESP_FAIL;
}
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;
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);
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;
}
}
@@ -169,12 +204,12 @@ esp_err_t ledc_timer_config(ledc_timer_config_t* timer_conf)
esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc_channel)
{
LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "ledc GPIO output number error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), LEDC_GPIO_OUT_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
if(speed_mode == LEDC_HIGH_SPEED_MODE) {
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");
@@ -191,10 +226,10 @@ esp_err_t ledc_channel_config(ledc_channel_config_t* ledc_conf)
uint32_t timer_select = ledc_conf->timer_sel;
uint32_t intr_type = ledc_conf->intr_type;
uint32_t duty = ledc_conf->duty;
LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "ledc GPIO output number error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_select <= LEDC_TIMER_3, "ledc timer error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(ledc_channel <= LEDC_CHANNEL_7, LEDC_CHANNEL_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), LEDC_GPIO_OUT_ERR_STR, ESP_ERR_INVALID_ARG);
LEDC_CHECK(timer_select <= LEDC_TIMER_3, LEDC_TIMER_ERR_STR, ESP_ERR_INVALID_ARG);
periph_module_enable(PERIPH_LEDC_MODULE);
esp_err_t ret = ESP_OK;
/*set channel parameters*/
@@ -207,7 +242,7 @@ esp_err_t ledc_channel_config(ledc_channel_config_t* ledc_conf)
ledc_bind_channel_timer(speed_mode, ledc_channel, timer_select);
/*set interrupt type*/
ledc_enable_intr_type(speed_mode, ledc_channel, intr_type);
ESP_LOGI(LEDC_TAG, "LEDC_PWM CHANNEL %1u|GPIO %02u|Duty %04u|Time %01u",
ESP_LOGD(LEDC_TAG, "LEDC_PWM CHANNEL %1u|GPIO %02u|Duty %04u|Time %01u",
ledc_channel, gpio_num, duty, timer_select
);
/*set LEDC signal in gpio matrix*/
@@ -219,8 +254,8 @@ esp_err_t ledc_channel_config(ledc_channel_config_t* ledc_conf)
esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
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);
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;
@@ -230,8 +265,8 @@ esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
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);
portENTER_CRITICAL(&ledc_spinlock);
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;
@@ -239,16 +274,20 @@ esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idl
portEXIT_CRITICAL(&ledc_spinlock);
return ESP_OK;
}
esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, ledc_duty_direction_t fade_direction,
uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(fade_direction <= LEDC_DUTY_DIR_INCREASE, "ledc fade direction error", ESP_ERR_INVALID_ARG);
if(step_num > LEDC_DUTY_NUM_HSCH0_V || duty_cyle_num > LEDC_DUTY_CYCLE_HSCH0_V || duty_scale > LEDC_DUTY_SCALE_HSCH0_V) {
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);
LEDC_CHECK(fade_direction <= LEDC_DUTY_DIR_INCREASE, LEDC_FADE_DIR_ERR_STR, ESP_ERR_INVALID_ARG);
if (step_num > LEDC_DUTY_NUM_HSCH0_V || duty_cyle_num > LEDC_DUTY_CYCLE_HSCH0_V || duty_scale > LEDC_DUTY_SCALE_HSCH0_V) {
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) {
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
}
ledc_duty_config(speed_mode,
channel, //uint32_t chan_num,
0, //uint32_t hpoint_val,
@@ -263,8 +302,11 @@ esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t
esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(channel <= LEDC_CHANNEL_7, "ledc channel error", ESP_ERR_INVALID_ARG);
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) {
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
}
ledc_duty_config(speed_mode,
channel, //uint32_t chan_num,
0, //uint32_t hpoint_val,
@@ -279,26 +321,26 @@ esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t
int ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", (-1));
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, (-1));
uint32_t duty = (LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> 4);
return duty;
}
esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz)
{
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "ledc mode error", ESP_ERR_INVALID_ARG);
LEDC_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, LEDC_MODE_ERR_STR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&ledc_spinlock);
esp_err_t ret = ESP_OK;
uint32_t div_num = 0;
uint32_t bit_num = LEDC.timer_group[speed_mode].timer[timer_num].conf.bit_num;
uint32_t timer_source_clk = LEDC.timer_group[speed_mode].timer[timer_num].conf.tick_sel;
uint32_t precision = (0x1 << bit_num);
if(timer_source_clk == LEDC_APB_CLK) {
div_num = ((uint64_t) LEDC_APB_CLK_HZ << 8) / freq_hz / precision;
uint32_t precision = ( 0x1 << bit_num );
if (timer_source_clk == LEDC_APB_CLK) {
div_num = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / freq_hz / precision;
} else {
div_num = ((uint64_t) LEDC_REF_CLK_HZ << 8) / freq_hz / precision;
div_num = ( (uint64_t) LEDC_REF_CLK_HZ << 8 ) / freq_hz / precision;
}
if(div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) {
if (div_num <= 256 || div_num > LEDC_DIV_NUM_HSTIMER0) {
ESP_LOGE(LEDC_TAG, "div param err,div_param=%u", div_num);
ret = ESP_FAIL;
}
@@ -309,18 +351,217 @@ 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 error", (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);
if(timer_source_clk == LEDC_APB_CLK) {
freq = ((uint64_t) LEDC_APB_CLK_HZ << 8) / precision / div_num;
uint32_t precision = ( 0x1 << bit_num );
if (timer_source_clk == LEDC_APB_CLK) {
freq = ( (uint64_t) LEDC_APB_CLK_HZ << 8 ) / precision / div_num;
} else {
freq = ((uint64_t) LEDC_REF_CLK_HZ << 8) / precision / div_num;
freq = ( (uint64_t) LEDC_REF_CLK_HZ << 8 ) / precision / div_num;
}
portEXIT_CRITICAL(&ledc_spinlock);
return freq;
}
void IRAM_ATTR ledc_fade_isr()
{
int i;
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() ;
}
}
continue;
}
int duty_tar = s_ledc_fade_rec[i].target_duty;
int scale = s_ledc_fade_rec[i].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 step = delta / scale > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : delta / scale;
if (delta > scale) {
ledc_duty_config(
speed_mode,
i,
LEDC_VAL_NO_CHANGE,
duty_cur << LEDC_DUTY_DECIMAL_BIT_NUM,
s_ledc_fade_rec[i].direction,
step,
cycle,
scale);
} else {
ledc_duty_config(
speed_mode,
i,
LEDC_VAL_NO_CHANGE,
duty_tar << LEDC_DUTY_DECIMAL_BIT_NUM,
s_ledc_fade_rec[i].direction,
1,
1,
0);
}
LEDC.channel_group[speed_mode].channel[i].conf1.duty_start = 1;
}
}
LEDC.int_clr.val = intr_status; //clear LEDC interrupt status.
}
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)
{
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
int max_duty = ( 1 << ( LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num ) ) - 1;
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
uint32_t freq = ledc_get_freq(speed_mode, timer_sel);
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
int duty_delta = target_duty > duty_cur ? target_duty - duty_cur : duty_cur - target_duty;
if (duty_delta == 0) {
return ESP_OK;
}
int total_cycles = max_fade_time_ms * freq / 1000;
int scale, cycle_num;
if (total_cycles > duty_delta) {
scale = 1;
cycle_num = total_cycles / duty_delta;
} else {
cycle_num = 1;
scale = ( duty_delta + total_cycles - 1 ) / total_cycles;
}
return ledc_set_fade_with_step(speed_mode, channel, target_duty, scale, cycle_num);
}
esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, int target_duty, int scale, int cycle_num)
{
LEDC_CHECK(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);
int timer_sel = LEDC.channel_group[speed_mode].channel[channel].conf0.timer_sel;
int max_duty = (1 << (LEDC.timer_group[speed_mode].timer[timer_sel].conf.bit_num)) - 1;
LEDC_CHECK(target_duty <= max_duty, LEDC_FADE_TARGET_ERR_STR, ESP_ERR_INVALID_ARG);
//disable the interrupt, so the operation will not mess up
ledc_enable_intr_type(speed_mode, channel, LEDC_INTR_DISABLE);
portENTER_CRITICAL(&ledc_spinlock);
int duty_cur = LEDC.channel_group[speed_mode].channel[channel].duty_rd.duty_read >> LEDC_DUTY_DECIMAL_BIT_NUM;
int duty_delta = target_duty > duty_cur ? target_duty - duty_cur : duty_cur - target_duty;
if (duty_delta == 0) {
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;
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;
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;
step_num = step_num > LEDC_STEP_NUM_MAX ? LEDC_STEP_NUM_MAX : step_num;
}
portEXIT_CRITICAL(&ledc_spinlock);
ledc_set_fade(
speed_mode,
channel,
duty_cur,
s_ledc_fade_rec[channel].direction,
step_num,
s_ledc_fade_rec[channel].cycle_num,
s_ledc_fade_rec[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
);
LEDC.int_clr.val |= BIT(LEDC_DUTY_CHNG_END_HSCH0_INT_ENA_S + 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;
}
void ledc_fade_func_uninstall()
{
if (s_ledc_fade_rec == NULL) {
return;
}
if(s_ledc_fade_isr_handle) {
esp_intr_free(s_ledc_fade_isr_handle);
s_ledc_fade_isr_handle = NULL;
}
int 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);
}
}
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)
{
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);
if (wait_done == LEDC_FADE_WAIT_DONE) {
s_ledc_fade_rec[channel].mode = LEDC_FADE_WAIT_DONE;
ledc_update_duty(speed_mode, channel);
xSemaphoreTake(s_ledc_fade_rec[channel].ledc_fade_sem, portMAX_DELAY);
} else {
s_ledc_fade_rec[channel].mode = LEDC_FADE_NO_WAIT;
ledc_update_duty(speed_mode, channel);
}
xSemaphoreGive(s_ledc_fade_rec[channel].ledc_fade_mux);
return ESP_OK;
}