I am trying to create database by using JSON and SD library.
But i stuck in a problem "Controller hanging" after removing lot of stuff to make Memory Efficent Solution still i happens again.
Specifications
Flash 128k
SRAM 16k
Hardware
Offical Arduino Ethernet Shield
Zigduino board
To debug problem four tests were perform
Test 1 Only Parsing funtion Call
Status Ok
Test 2 Only Writng funtion Call
Status Ok
Test 3 Only Parsing funtion Call
Status Ok
Test 4 Both funtion Call
Status Hang
This the code and outputs of all tests attached .Status ok in zip file due limitation of 4 files
#include <aJSON.h>
#include <SD.h>
File myFile;
char* readFile(char* file)
{
Serial.println(FreeRam(),DEC);
char buf[30];
char strFile[600];
int16_t readed;
myFile = SD.open(file,FILE_READ);
if(myFile)
{
readed = myFile.read(buf,30);
buf[readed] = '\0';
String stringOne = String(buf);
while( readed > 0) {
readed = myFile.read(buf,30);
buf[readed] = '\0';
stringOne += String(buf);
}
myFile.close();
stringOne.toCharArray(strFile,stringOne.length()+1);
//Serial.println(strFile);
return strFile;
}
else
Serial.println("Fail to open file");
}
void parseFile(char* object)
{
Serial.println(FreeRam(),DEC);
char* pch =readFile("test.txt");
Serial.println(pch);
aJsonObject* root = aJson.parse(pch);
if (root != NULL) {
Serial.println(F("Parsed successfully 1 "));
aJsonObject* query = aJson.getObjectItem(root, object);
char *json_String=aJson.print(query);
Serial.println(json_String);
Serial.println(F("**"));
free(json_String);
free(pch);
}
else
Serial.println(F("Parsed unsuccessfully 1"));
aJson.deleteItem(root);
}
void writeDb(char* object)
{
char* buff = readFile("test.txt");
//Serial.println(buff);
Serial.println(FreeRam(),DEC);
Serial.println(F("HANG POINT"));
aJsonObject* root = aJson.parse(buff);
if (root != NULL) {
Serial.println(F("writdb successfully 1 "));
aJsonObject *tmp = aJson.createObject();
aJson.addStringToObject(tmp, "value1","1101");
aJson.addStringToObject(tmp, "value2","1102");
aJson.addStringToObject(tmp, "value3","1103");
aJson.replaceItemInObject(root, object, tmp);
SD.remove("test.txt");
delay(100);
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
char* json_String = aJson.print(root);
myFile.print(json_String);
myFile.close();
Serial.println(F("FileClosed"));
Serial.println(F("WR**"));
//aJson.deleteItem(tmp);
free(json_String);
free(buff);
}
else
Serial.println(F("File Not Truncate"));
}
else
Serial.println(F("wrtidb unsuccessfully 1 "));
aJson.deleteItem(root);
}
void setup() {
Serial.begin(9600);
pinMode(SS, OUTPUT); // set the SS pin as an output (necessary!)
digitalWrite(SS, HIGH); // but turn off the W5100 chip!
if (!SD.begin(4)) {
Serial.println(F("initialization failed!"));
return;
}
Serial.println(FreeRam(),DEC);
parseFile("config0");
Serial.println(F("Parse done"));
writeDb("config0");
Serial.println(F("Write done"));
Serial.println(FreeRam(),DEC);
}
void loop() {
// Nothing to do
;
}
I really need suggestion because after playing 10 hours with this now i am in Blackout Stage. 8)
Execute Status OK.rar (144 KB)
