150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
#include "datalog.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include "esp_littlefs.h"
|
|
#include "esp_log.h"
|
|
|
|
static const char* TAG = "DATALOG";
|
|
static const char* LOG_FILE_PATH = "/littlefs/datalog.csv";
|
|
#define MAX_LOG_SIZE (512 * 1024)
|
|
|
|
void datalog_init(void)
|
|
{
|
|
ESP_LOGI(TAG, "Initializing DataLog with LittleFS");
|
|
|
|
esp_vfs_littlefs_conf_t conf = {
|
|
.base_path = "/littlefs",
|
|
.partition_label = "littlefs",
|
|
.format_if_mount_failed = true,
|
|
.dont_mount = false,
|
|
};
|
|
|
|
esp_err_t ret = esp_vfs_littlefs_register(&conf);
|
|
|
|
if (ret != ESP_OK)
|
|
{
|
|
if (ret == ESP_FAIL)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to mount or format filesystem");
|
|
}
|
|
else if (ret == ESP_ERR_NOT_FOUND)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to find LittleFS partition");
|
|
}
|
|
else
|
|
{
|
|
ESP_LOGE(TAG, "Failed to initialize LittleFS (%s)", esp_err_to_name(ret));
|
|
}
|
|
return;
|
|
}
|
|
|
|
size_t total = 0, used = 0;
|
|
ret = esp_littlefs_info(NULL, &total, &used);
|
|
if (ret != ESP_OK)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to get LittleFS partition information (%s)", esp_err_to_name(ret));
|
|
}
|
|
else
|
|
{
|
|
ESP_LOGI(TAG, "Partition size: total: %d, used: %d", total, used);
|
|
}
|
|
|
|
// Check if file exists
|
|
FILE* f = fopen(LOG_FILE_PATH, "r");
|
|
if (f == NULL)
|
|
{
|
|
ESP_LOGI(TAG, "Log file not found, creating new one.");
|
|
FILE* f_write = fopen(LOG_FILE_PATH, "w");
|
|
if (f_write == NULL)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to create log file.");
|
|
}
|
|
else
|
|
{
|
|
// Add header
|
|
fprintf(f_write, "timestamp,voltage,current,power\n");
|
|
fclose(f_write);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ESP_LOGI(TAG, "Log file found.");
|
|
fclose(f);
|
|
}
|
|
}
|
|
|
|
void datalog_add(uint32_t timestamp, float voltage, float current, float power)
|
|
{
|
|
struct stat st;
|
|
if (stat(LOG_FILE_PATH, &st) == 0)
|
|
{
|
|
if (st.st_size >= MAX_LOG_SIZE)
|
|
{
|
|
ESP_LOGI(TAG, "Log file size (%ld) >= MAX_LOG_SIZE (%d). Truncating.", st.st_size, MAX_LOG_SIZE);
|
|
|
|
const char* temp_path = "/littlefs/datalog.tmp";
|
|
FILE* f_read = fopen(LOG_FILE_PATH, "r");
|
|
FILE* f_write = fopen(temp_path, "w");
|
|
|
|
if (f_read == NULL || f_write == NULL)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to open files for truncation.");
|
|
if (f_read) fclose(f_read);
|
|
if (f_write) fclose(f_write);
|
|
return;
|
|
}
|
|
|
|
char line[256];
|
|
// Copy header
|
|
if (fgets(line, sizeof(line), f_read) != NULL)
|
|
{
|
|
fputs(line, f_write);
|
|
}
|
|
|
|
// Skip the oldest data line
|
|
if (fgets(line, sizeof(line), f_read) == NULL)
|
|
{
|
|
// No data lines to skip, something is wrong if we are truncating
|
|
}
|
|
|
|
// Copy the rest of the lines
|
|
while (fgets(line, sizeof(line), f_read) != NULL)
|
|
{
|
|
fputs(line, f_write);
|
|
}
|
|
|
|
fclose(f_read);
|
|
fclose(f_write);
|
|
|
|
// Replace the old log with the new one
|
|
if (remove(LOG_FILE_PATH) != 0)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to remove old log file.");
|
|
}
|
|
if (rename(temp_path, LOG_FILE_PATH) != 0)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to rename temp file.");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
FILE* f = fopen(LOG_FILE_PATH, "a");
|
|
if (f == NULL)
|
|
{
|
|
ESP_LOGE(TAG, "Failed to open log file for appending.");
|
|
return;
|
|
}
|
|
|
|
fprintf(f, "%lu,%.3f,%.3f,%.3f\n", timestamp, voltage, current, power);
|
|
fclose(f);
|
|
}
|
|
|
|
const char* datalog_get_path(void)
|
|
{
|
|
return LOG_FILE_PATH;
|
|
}
|