ESP8266 SQLite always reset - c

Question

I do not know english. I'm using google translate. I apologize in advance.
I will use ESP8266 in a project that I will run on battery. For this reason, I do not want to use an SD card.
I will use the database in FLASH using SPIFFS.
The example I got from the ESP8266 sqlite3 library runs the sql commands in the SETUP paragraph. But when I call these commands from outside of SETUP with FUNCTION, the device is reset. Below I present both codes for your information.
I am already grateful for your help.
This is the original library sample. It always works.
/*
This creates two empty databases, populates values, and retrieves them back
from the SPIFFS file system.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sqlite3.h>
#include <vfs.h>
#include <SPI.h>
#include <FS.h>
extern "C" {
#include "user_interface.h"
}
#include <ESP8266WiFi.h>
void WiFiOff() {
wifi_station_disconnect();
wifi_set_opmode(NULL_MODE);
wifi_set_sleep_type(MODEM_SLEEP_T);
wifi_fpm_open();
wifi_fpm_do_sleep(0xFFFFFFF);
}
const char* data = "Callback function called";
static int callback(void *data, int argc, char **argv, char **azColName) {
int i;
Serial.printf("%s: ", (const char*)data);
for (i = 0; i<argc; i++){
Serial.printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
}
Serial.printf("\n");
return 0;
}
int db_open(const char *filename, sqlite3 **db) {
int rc = sqlite3_open(filename, db);
if (rc) {
Serial.printf("Can't open database: %s\n", sqlite3_errmsg(*db));
return rc;
} else {
Serial.printf("Opened database successfully\n");
}
return rc;
}
char *zErrMsg = 0;
int db_exec(sqlite3 *db, const char *sql) {
Serial.println(sql);
long start = micros();
int rc = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg);
if (rc != SQLITE_OK) {
Serial.printf("SQL error: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
} else {
Serial.printf("Operation done successfully\n");
}
Serial.print(F("Time taken:"));
Serial.println(micros()-start);
return rc;
}
void setup() {
Serial.begin(74880);
sqlite3 *db1;
sqlite3 *db2;
int rc;
system_update_cpu_freq(SYS_CPU_160MHZ);
WiFiOff();
if (!SPIFFS.begin()) {
Serial.println("Failed to mount file system");
return;
}
// list SPIFFS contents
Dir dir = SPIFFS.openDir("/");
while (dir.next()) {
String fileName = dir.fileName();
size_t fileSize = dir.fileSize();
Serial.printf("FS File: %s, size: %ld\n", fileName.c_str(), (long) fileSize);
}
Serial.printf("\n");
// remove existing file
SPIFFS.remove("/test1.db");
SPIFFS.remove("/test2.db");
sqlite3_initialize();
// Open databases
File db_file_obj_1;
vfs_set_spiffs_file_obj(&db_file_obj_1);
if (db_open("/FLASH/test1.db", &db1))
return;
File db_file_obj_2;
vfs_set_spiffs_file_obj(&db_file_obj_2);
if (db_open("/FLASH/test2.db", &db2))
return;
rc = db_exec(db1, "CREATE TABLE test1 (id INTEGER, content);");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
rc = db_exec(db2, "CREATE TABLE test2 (id INTEGER, content);");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
rc = db_exec(db1, "INSERT INTO test1 VALUES (1, 'Hello, World from test1');");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
rc = db_exec(db2, "INSERT INTO test2 VALUES (1, 'Hello, World from test2');");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
rc = db_exec(db1, "SELECT * FROM test1");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
rc = db_exec(db2, "SELECT * FROM test2");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
sqlite3_close(db2);
return;
}
sqlite3_close(db1);
sqlite3_close(db2);
}
void loop() {
}
This is the version of the function called from outside of SETUP.
The device resets when other functions are called except OPENDATABASE (such as Select Values ​​()).
/*
This creates two empty databases, populates values, and retrieves them back
from the SPIFFS file system.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sqlite3.h>
#include <vfs.h>
#include <SPI.h>
#include <FS.h>
extern "C" {
#include "user_interface.h"
}
#include <ESP8266WiFi.h>
sqlite3* db1;
void WiFiOff() {
wifi_station_disconnect();
wifi_set_opmode(NULL_MODE);
wifi_set_sleep_type(MODEM_SLEEP_T);
wifi_fpm_open();
wifi_fpm_do_sleep(0xFFFFFFF);
}
const char* data = "Callback function called";
static int callback(void* data, int argc, char** argv, char** azColName) {
int i;
Serial.printf("%s: ", (const char*)data);
for (i = 0; i < argc; i++) {
Serial.printf("%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
}
Serial.printf("\n");
return 0;
}
int db_open(const char* filename, sqlite3** db) {
int rc = sqlite3_open(filename, db);
if (rc) {
Serial.printf("Can't open database: %s\n", sqlite3_errmsg(*db));
return rc;
}
else {
Serial.printf("Opened database successfully\n");
}
return rc;
}
char* zErrMsg = 0;
int db_exec(sqlite3* db, const char* sql) {
Serial.println(sql);
long start = micros();
int rc = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg);
if (rc != SQLITE_OK) {
Serial.printf("SQL error: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
}
else {
Serial.printf("Operation done successfully\n");
}
Serial.print(F("Time taken:"));
Serial.println(micros() - start);
return rc;
}
void OpenDatabase();
void CreateTable();
void InsertValues();
void SelectValues();
void setup() {
Serial.begin(74880);
system_update_cpu_freq(SYS_CPU_160MHZ);
WiFiOff();
if (!SPIFFS.begin()) {
Serial.println("Failed to mount file system");
return;
}
// list SPIFFS contents
Dir dir = SPIFFS.openDir("/");
while (dir.next()) {
String fileName = dir.fileName();
size_t fileSize = dir.fileSize();
Serial.printf("FS File: %s, size: %ld\n", fileName.c_str(), (long)fileSize);
}
Serial.printf("\n");
// remove existing file
SPIFFS.remove("/test1.db");
sqlite3_initialize();
OpenDatabase();
CreateTable();
InsertValues();
SelectValues(); */
// list SPIFFS contents
dir = SPIFFS.openDir("/");
while (dir.next()) {
String fileName = dir.fileName();
size_t fileSize = dir.fileSize();
Serial.printf("FS File: %s, size: %ld\n", fileName.c_str(), (long)fileSize);
}
Serial.printf("\n");
}
void loop() {
}
void OpenDatabase() {
int rc;
// Open databases
File db_file_obj_1;
vfs_set_spiffs_file_obj(&db_file_obj_1);
if (db_open("/test1.db", &db1)) return;
}
void CreateTable() {
int rc;
// Create Table
rc = db_exec(db1, "CREATE TABLE IF NOT EXISTS test1 (id INTEGER, content);");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
return;
}
}
void InsertValues() {
int rc;
// Insert Values
rc = db_exec(db1, "INSERT INTO test1 VALUES (1, 'Hello, Hurol from test1');");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
return;
}
}
void SelectValues() {
int rc;
// Select Values
rc = db_exec(db1, "SELECT * FROM test1");
if (rc != SQLITE_OK) {
sqlite3_close(db1);
return;
}
}
}

Answer 1

worked!
File db_file_obj_1; vfs_set_spiffs_file_obj(&db_file_obj_1); I left this command in the setup section. So once it worked.
In this block, SPIFFS is set again each time.
Final: ... SETUP >
sqlite3_initialize();
File db_file_obj_1;
vfs_set_spiffs_file_obj(&db_file_obj_1);
OpenDatabase();
CreateTable();
InsertValues();
SelectValues();
... }
void OpenDatabase() {
int rc;
// Open databases
if (db_open("/test1.db", &db1)) return;
}
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