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[ld2410/ld2412/ld2450] Use index-based select publish_state to avoid heap allocations (#13051)

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This commit is contained in:
J. Nick Koston
2026-01-07 08:27:39 -10:00
committed by GitHub
parent a03c13f304
commit 2830c7dab8
4 changed files with 28 additions and 10 deletions
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7
esphome/components/ld2410/ld2410.cpp
View File

@@ -117,6 +117,8 @@ constexpr Uint8ToString OUT_PIN_LEVELS_BY_UINT[] = {
{OUT_PIN_LEVEL_HIGH, "high"},
};
constexpr uint32_t BAUD_RATES[] = {9600, 19200, 38400, 57600, 115200, 230400, 256000, 460800};
// Helper functions for lookups
template<size_t N> uint8_t find_uint8(const StringToUint8 (&arr)[N], const char *str) {
for (const auto &entry : arr) {
@@ -258,9 +260,10 @@ void LD2410Component::read_all_info() {
this->query_parameters_();
this->set_config_mode_(false);
#ifdef USE_SELECT
const auto baud_rate = std::to_string(this->parent_->get_baud_rate());
if (this->baud_rate_select_ != nullptr) {
this->baud_rate_select_->publish_state(baud_rate);
if (auto index = ld24xx::find_index(BAUD_RATES, this->parent_->get_baud_rate())) {
this->baud_rate_select_->publish_state(*index);
}
}
#endif
}

7
esphome/components/ld2412/ld2412.cpp
View File

@@ -128,6 +128,8 @@ constexpr Uint8ToString OUT_PIN_LEVELS_BY_UINT[] = {
{OUT_PIN_LEVEL_HIGH, "high"},
};
constexpr uint32_t BAUD_RATES[] = {9600, 19200, 38400, 57600, 115200, 230400, 256000, 460800};
// Helper functions for lookups
template<size_t N> uint8_t find_uint8(const StringToUint8 (&arr)[N], const char *str) {
for (const auto &entry : arr) {
@@ -293,9 +295,10 @@ void LD2412Component::read_all_info() {
#endif
this->set_config_mode_(false);
#ifdef USE_SELECT
const auto baud_rate = std::to_string(this->parent_->get_baud_rate());
if (this->baud_rate_select_ != nullptr) {
this->baud_rate_select_->publish_state(baud_rate);
if (auto index = ld24xx::find_index(BAUD_RATES, this->parent_->get_baud_rate())) {
this->baud_rate_select_->publish_state(*index);
}
}
#endif
}

15
esphome/components/ld2450/ld2450.cpp
View File

@@ -88,6 +88,9 @@ constexpr StringToUint8 ZONE_TYPE_BY_STR[] = {
{"Filter", ZONE_FILTER},
};
// Baud rates in the same order as BAUD_RATES_BY_STR for index-based lookup
constexpr uint32_t BAUD_RATES[] = {9600, 19200, 38400, 57600, 115200, 230400, 256000, 460800};
// Helper functions for lookups
template<size_t N> uint8_t find_uint8(const StringToUint8 (&arr)[N], const std::string &str) {
for (const auto &entry : arr) {
@@ -376,9 +379,10 @@ void LD2450Component::read_all_info() {
this->query_zone_();
this->set_config_mode_(false);
#ifdef USE_SELECT
const auto baud_rate = std::to_string(this->parent_->get_baud_rate());
if (this->baud_rate_select_ != nullptr && strcmp(this->baud_rate_select_->current_option(), baud_rate.c_str()) != 0) {
this->baud_rate_select_->publish_state(baud_rate);
if (this->baud_rate_select_ != nullptr) {
if (auto index = ld24xx::find_index(BAUD_RATES, this->parent_->get_baud_rate())) {
this->baud_rate_select_->publish_state(*index);
}
}
this->publish_zone_type();
#endif
@@ -710,7 +714,7 @@ bool LD2450Component::handle_ack_data_() {
case CMD_QUERY_ZONE:
ESP_LOGV(TAG, "Query zone conf");
this->zone_type_ = std::stoi(std::to_string(this->buffer_data_[10]), nullptr, 16);
this->zone_type_ = this->buffer_data_[10];
this->publish_zone_type();
#ifdef USE_SELECT
if (this->zone_type_select_ != nullptr) {
@@ -812,9 +816,8 @@ void LD2450Component::set_zone_type(const char *state) {
// Publish Zone Type to Select component
void LD2450Component::publish_zone_type() {
#ifdef USE_SELECT
std::string zone_type = find_str(ZONE_TYPE_BY_UINT, this->zone_type_);
if (this->zone_type_select_ != nullptr) {
this->zone_type_select_->publish_state(zone_type);
this->zone_type_select_->publish_state(find_str(ZONE_TYPE_BY_UINT, this->zone_type_));
}
#endif
}

9
esphome/components/ld24xx/ld24xx.h
View File

@@ -39,6 +39,15 @@
namespace esphome::ld24xx {
// Helper to find index of value in constexpr array
template<size_t N> optional<size_t> find_index(const uint32_t (&arr)[N], uint32_t value) {
for (size_t i = 0; i < N; i++) {
if (arr[i] == value)
return i;
}
return {};
}
static const char *const UNKNOWN_MAC = "unknown";
static const char *const VERSION_FMT = "%u.%02X.%02X%02X%02X%02X";