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Code Issues Releases Wiki Activity

Configurable Flash Write Interval (#2119)

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Co-authored-by: Alex <33379584+alexyao2015@users.noreply.github.com>
Co-authored-by: Otto winter <otto@otto-winter.com>
This commit is contained in:
Alex
2021-09-21 06:47:51 -05:00
committed by GitHub
parent 71fc61117b
commit 491f8cc611
10 changed files with 160 additions and 41 deletions
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1
esphome/components/esp32/__init__.py
View File

@@ -34,6 +34,7 @@ from .gpio import esp32_pin_to_code # noqa
_LOGGER = logging.getLogger(__name__)
CODEOWNERS = ["@esphome/core"]
AUTO_LOAD = ["preferences"]
def set_core_data(config):

72
esphome/components/esp32/preferences.cpp
View File

@@ -4,30 +4,53 @@
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#include <nvs_flash.h>
#include <cstring>
#include <vector>
#include <string>
namespace esphome {
namespace esp32 {
static const char *const TAG = "esp32.preferences";
struct NVSData {
std::string key;
std::vector<uint8_t> data;
};
static std::vector<NVSData> s_pending_save; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
class ESP32PreferenceBackend : public ESPPreferenceBackend {
public:
std::string key;
uint32_t nvs_handle;
bool save(const uint8_t *data, size_t len) override {
esp_err_t err = nvs_set_blob(nvs_handle, key.c_str(), data, len);
if (err != 0) {
ESP_LOGV(TAG, "nvs_set_blob('%s', len=%u) failed: %s", key.c_str(), len, esp_err_to_name(err));
return false;
}
err = nvs_commit(nvs_handle);
if (err != 0) {
ESP_LOGV(TAG, "nvs_commit('%s', len=%u) failed: %s", key.c_str(), len, esp_err_to_name(err));
return false;
// try find in pending saves and update that
for (auto &obj : s_pending_save) {
if (obj.key == key) {
obj.data.assign(data, data + len);
return true;
}
}
NVSData save{};
save.key = key;
save.data.assign(data, data + len);
s_pending_save.emplace_back(save);
return true;
}
bool load(uint8_t *data, size_t len) override {
// try find in pending saves and load from that
for (auto &obj : s_pending_save) {
if (obj.key == key) {
if (obj.data.size() != len) {
// size mismatch
return false;
}
memcpy(data, obj.data.data(), len);
return true;
}
}
size_t actual_len;
esp_err_t err = nvs_get_blob(nvs_handle, key.c_str(), nullptr, &actual_len);
if (err != 0) {
@@ -82,6 +105,37 @@ class ESP32Preferences : public ESPPreferences {
return ESPPreferenceObject(pref);
}
bool sync() override {
if (s_pending_save.empty())
return true;
ESP_LOGD(TAG, "Saving preferences to flash...");
// goal try write all pending saves even if one fails
bool any_failed = false;
// go through vector from back to front (makes erase easier/more efficient)
for (ssize_t i = s_pending_save.size() - 1; i >= 0; i--) {
const auto &save = s_pending_save[i];
esp_err_t err = nvs_set_blob(nvs_handle, save.key.c_str(), save.data.data(), save.data.size());
if (err != 0) {
ESP_LOGV(TAG, "nvs_set_blob('%s', len=%u) failed: %s", save.key.c_str(), save.data.size(),
esp_err_to_name(err));
any_failed = true;
continue;
}
s_pending_save.erase(s_pending_save.begin() + i);
}
// note: commit on esp-idf currently is a no-op, nvs_set_blob always writes
esp_err_t err = nvs_commit(nvs_handle);
if (err != 0) {
ESP_LOGV(TAG, "nvs_commit() failed: %s", esp_err_to_name(err));
return false;
}
return !any_failed;
}
};
void setup_preferences() {