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Code Issues Releases Wiki Activity

Ledc fix (#4338)

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This commit is contained in:
WitchKing
2023-02-13 03:53:40 +01:00
committed by Jesse Hills
parent 4899dfe642
commit 78e18256f7
1 changed files with 115 additions and 25 deletions
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140
esphome/components/ledc/ledc_output.cpp
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@@ -8,6 +8,20 @@
#endif
#include <driver/ledc.h>
#define CLOCK_FREQUENCY 80e6f
#ifdef USE_ARDUINO
#ifdef SOC_LEDC_SUPPORT_XTAL_CLOCK
#undef CLOCK_FREQUENCY
// starting with ESP32 Arduino 2.0.2, the 40MHz crystal is used as clock by default if supported
#define CLOCK_FREQUENCY 40e6f
#endif
#else
#define DEFAULT_CLK LEDC_USE_APB_CLK
#endif
static const uint8_t SETUP_ATTEMPT_COUNT_MAX = 5;
namespace esphome {
namespace ledc {
@@ -26,11 +40,11 @@ inline ledc_mode_t get_speed_mode(uint8_t) { return LEDC_LOW_SPEED_MODE; }
#endif
#endif
float ledc_max_frequency_for_bit_depth(uint8_t bit_depth) { return 80e6f / float(1 << bit_depth); }
float ledc_max_frequency_for_bit_depth(uint8_t bit_depth) { return CLOCK_FREQUENCY / float(1 << bit_depth); }
float ledc_min_frequency_for_bit_depth(uint8_t bit_depth, bool low_frequency) {
const float max_div_num = ((1 << MAX_RES_BITS) - 1) / (low_frequency ? 32.0f : 256.0f);
return 80e6f / (max_div_num * float(1 << bit_depth));
return CLOCK_FREQUENCY / (max_div_num * float(1 << bit_depth));
}
optional<uint8_t> ledc_bit_depth_for_frequency(float frequency) {
@@ -46,6 +60,38 @@ optional<uint8_t> ledc_bit_depth_for_frequency(float frequency) {
return {};
}
#ifdef USE_ESP_IDF
esp_err_t configure_timer_frequency(ledc_mode_t speed_mode, ledc_timer_t timer_num, ledc_channel_t chan_num,
uint8_t channel, uint8_t &bit_depth, float frequency) {
bit_depth = *ledc_bit_depth_for_frequency(frequency);
if (bit_depth < 1) {
ESP_LOGE(TAG, "Frequency %f can't be achieved with any bit depth", frequency);
}
ledc_timer_config_t timer_conf{};
timer_conf.speed_mode = speed_mode;
timer_conf.duty_resolution = static_cast<ledc_timer_bit_t>(bit_depth);
timer_conf.timer_num = timer_num;
timer_conf.freq_hz = (uint32_t) frequency;
timer_conf.clk_cfg = DEFAULT_CLK;
// Configure the time with fallback in case of error
int attempt_count_max = SETUP_ATTEMPT_COUNT_MAX;
esp_err_t init_result = ESP_FAIL;
while (attempt_count_max > 0 && init_result != ESP_OK) {
init_result = ledc_timer_config(&timer_conf);
if (init_result != ESP_OK) {
ESP_LOGW(TAG, "Unable to initialize timer with frequency %.1f and bit depth of %u", frequency, bit_depth);
// try again with a lower bit depth
timer_conf.duty_resolution = static_cast<ledc_timer_bit_t>(--bit_depth);
}
attempt_count_max--;
}
return init_result;
}
#endif
void LEDCOutput::write_state(float state) {
if (!initialized_) {
ESP_LOGW(TAG, "LEDC output hasn't been initialized yet!");
@@ -61,6 +107,7 @@ void LEDCOutput::write_state(float state) {
auto duty = static_cast<uint32_t>(duty_rounded);
#ifdef USE_ARDUINO
ESP_LOGV(TAG, "Setting duty: %u on channel %u", duty, this->channel_);
ledcWrite(this->channel_, duty);
#endif
#ifdef USE_ESP_IDF
@@ -72,6 +119,7 @@ void LEDCOutput::write_state(float state) {
}
void LEDCOutput::setup() {
ESP_LOGV(TAG, "Entering setup...");
#ifdef USE_ARDUINO
this->update_frequency(this->frequency_);
this->turn_off();
@@ -83,19 +131,16 @@ void LEDCOutput::setup() {
auto timer_num = static_cast<ledc_timer_t>((channel_ % 8) / 2);
auto chan_num = static_cast<ledc_channel_t>(channel_ % 8);
bit_depth_ = *ledc_bit_depth_for_frequency(frequency_);
if (bit_depth_ < 1) {
ESP_LOGW(TAG, "Frequency %f can't be achieved with any bit depth", frequency_);
this->status_set_warning();
esp_err_t timer_init_result =
configure_timer_frequency(speed_mode, timer_num, chan_num, this->channel_, this->bit_depth_, this->frequency_);
if (timer_init_result != ESP_OK) {
ESP_LOGE(TAG, "Frequency %f can't be achieved with computed bit depth %u", this->frequency_, this->bit_depth_);
this->status_set_error();
return;
}
ledc_timer_config_t timer_conf{};
timer_conf.speed_mode = speed_mode;
timer_conf.duty_resolution = static_cast<ledc_timer_bit_t>(bit_depth_);
timer_conf.timer_num = timer_num;
timer_conf.freq_hz = (uint32_t) frequency_;
timer_conf.clk_cfg = LEDC_AUTO_CLK;
ledc_timer_config(&timer_conf);
ESP_LOGV(TAG, "Configured frequency %f with a bit depth of %u bits", this->frequency_, this->bit_depth_);
ledc_channel_config_t chan_conf{};
chan_conf.gpio_num = pin_->get_pin();
@@ -107,6 +152,7 @@ void LEDCOutput::setup() {
chan_conf.hpoint = 0;
ledc_channel_config(&chan_conf);
initialized_ = true;
this->status_clear_error();
#endif
}
@@ -114,36 +160,80 @@ void LEDCOutput::dump_config() {
ESP_LOGCONFIG(TAG, "LEDC Output:");
LOG_PIN(" Pin ", this->pin_);
ESP_LOGCONFIG(TAG, " LEDC Channel: %u", this->channel_);
ESP_LOGCONFIG(TAG, " Frequency: %.1f Hz", this->frequency_);
ESP_LOGCONFIG(TAG, " PWM Frequency: %.1f Hz", this->frequency_);
ESP_LOGCONFIG(TAG, " Bit depth: %u", this->bit_depth_);
ESP_LOGV(TAG, " Max frequency for bit depth: %f", ledc_max_frequency_for_bit_depth(this->bit_depth_));
ESP_LOGV(TAG, " Min frequency for bit depth: %f",
ledc_min_frequency_for_bit_depth(this->bit_depth_, (this->frequency_ < 100)));
ESP_LOGV(TAG, " Max frequency for bit depth-1: %f", ledc_max_frequency_for_bit_depth(this->bit_depth_ - 1));
ESP_LOGV(TAG, " Min frequency for bit depth-1: %f",
ledc_min_frequency_for_bit_depth(this->bit_depth_ - 1, (this->frequency_ < 100)));
ESP_LOGV(TAG, " Max frequency for bit depth+1: %f", ledc_max_frequency_for_bit_depth(this->bit_depth_ + 1));
ESP_LOGV(TAG, " Min frequency for bit depth+1: %f",
ledc_min_frequency_for_bit_depth(this->bit_depth_ + 1, (this->frequency_ < 100)));
ESP_LOGV(TAG, " Max res bits: %d", MAX_RES_BITS);
ESP_LOGV(TAG, " Clock frequency: %f", CLOCK_FREQUENCY);
}
void LEDCOutput::update_frequency(float frequency) {
auto bit_depth_opt = ledc_bit_depth_for_frequency(frequency);
if (!bit_depth_opt.has_value()) {
ESP_LOGW(TAG, "Frequency %f can't be achieved with any bit depth", frequency);
this->status_set_warning();
ESP_LOGE(TAG, "Frequency %f can't be achieved with any bit depth", this->frequency_);
this->status_set_error();
}
this->bit_depth_ = bit_depth_opt.value_or(8);
this->frequency_ = frequency;
#ifdef USE_ARDUINO
ledcSetup(this->channel_, frequency, this->bit_depth_);
initialized_ = true;
ESP_LOGV(TAG, "Using Arduino API - Trying to define channel, frequency and bit depth...");
u_int32_t configured_frequency = 0;
// Configure LEDC channel, frequency and bit depth with fallback
int attempt_count_max = SETUP_ATTEMPT_COUNT_MAX;
while (attempt_count_max > 0 && configured_frequency == 0) {
ESP_LOGV(TAG, "Trying initialize channel %u with frequency %.1f and bit depth of %u...", this->channel_,
this->frequency_, this->bit_depth_);
configured_frequency = ledcSetup(this->channel_, frequency, this->bit_depth_);
if (configured_frequency != 0) {
initialized_ = true;
this->status_clear_error();
ESP_LOGV(TAG, "Configured frequency: %u with bit depth: %u", configured_frequency, this->bit_depth_);
} else {
ESP_LOGW(TAG, "Unable to initialize channel %u with frequency %.1f and bit depth of %u", this->channel_,
this->frequency_, this->bit_depth_);
// try again with a lower bit depth
this->bit_depth_--;
}
attempt_count_max--;
}
if (configured_frequency == 0) {
ESP_LOGE(TAG, "Permanently failed to initialize channel %u with frequency %.1f and bit depth of %u", this->channel_,
this->frequency_, this->bit_depth_);
this->status_set_error();
return;
}
#endif // USE_ARDUINO
#ifdef USE_ESP_IDF
if (!initialized_) {
ESP_LOGW(TAG, "LEDC output hasn't been initialized yet!");
return;
}
auto speed_mode = get_speed_mode(channel_);
auto timer_num = static_cast<ledc_timer_t>((channel_ % 8) / 2);
auto chan_num = static_cast<ledc_channel_t>(channel_ % 8);
ledc_timer_config_t timer_conf{};
timer_conf.speed_mode = speed_mode;
timer_conf.duty_resolution = static_cast<ledc_timer_bit_t>(bit_depth_);
timer_conf.timer_num = timer_num;
timer_conf.freq_hz = (uint32_t) frequency_;
timer_conf.clk_cfg = LEDC_AUTO_CLK;
ledc_timer_config(&timer_conf);
esp_err_t timer_init_result =
configure_timer_frequency(speed_mode, timer_num, chan_num, this->channel_, this->bit_depth_, this->frequency_);
if (timer_init_result != ESP_OK) {
ESP_LOGE(TAG, "Frequency %f can't be achieved with computed bit depth %u", this->frequency_, this->bit_depth_);
this->status_set_error();
return;
}
this->status_clear_error();
#endif
// re-apply duty
this->write_state(this->duty_);