Raspberry Pi totaly freezes, runs fine on ubuntu laptop
Dear users,
I've got a problem witch is driving me crazy. I have a RS-485 connection with a platform. I use a FTDI chip in my usb port to connect to it. I get the data with open, read and write. This all works good, and does not make any problem.
After that, I push everything in a file (with only a write, because later on I send it to the next pi, witch is a server)
So, the program function is quit simple:
-Get the data from the platform
-Write it ins a file
On my Ubuntu laptop there is absolutely no problem, it runs smoothly.
This all works fine, but sometimes my raspberry freezes. It wan't do anything, and i need a hard reset. It's is not on a fixed time: the first time it runned for 1 hour, the second time for 5 minutes.
I already tried to:
1. Flush all the buffers
2. Searched for a memory leak (with top, and nothing appears to be)
3. A lot witch I don't remember now.
Can anyone please help me? It's giving me really big headaches!
Code:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#define MY_ID_H 0x01
#define MY_ID_L 0x00
#define Try_Again_Max 0x04
#define Timout_Sec 0x04
/* This is made by Libpgeak. */
static unsigned char output[9];
static unsigned char input[100];
static int Create_file(long long unsigned ntptime, int Power, float Rotation);
static int Serial_to_int(unsigned char *input, char NumberOfBytes);
static long long unsigned ntp_time(void);
static unsigned char Get_Checksum(int NumberOfBytes);
static int my_itoa(int val, char* buf);
int main()
{
int PSERIAL;
int i,j;
int TimeNow=0;
int TimeSo=0;
int TryCount=0;
char succes=0;
long long unsigned ntptime=0;
unsigned char TargetID[2];
float Rotation=0;
int Power=0;
system("stty -F /dev/ttyUSB0 9600 -parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts"
" ignbrk -brkint ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff"
" -iuclc -ixany -imaxbel -iutf8"
" -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0"
" -isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop -echoprt"
" -echoctl -echoke time 1");
while(1)
{
usleep(50000);
usleep(50000);
PSERIAL = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
if(PSERIAL ==-1)
{
printf("Could not open write connection with FTDI-chip, closing program\n\r");
return 100;
}
printf("Connected to FTDI chip\n\r");
fcntl(PSERIAL, F_SETFL, FNDELAY);
//Get the slave ID.
output[0] = 0x00;
output[1] = 0x00;
output[2] = MY_ID_L;
output[3] = MY_ID_H;
output[4] = 0xA1;
output[5] = 0xB0;
output[6] = 0xC0;
output[7] = 0x00;
output[8] = Get_Checksum(8);
succes=0;
while(!succes)
{
i=write (PSERIAL, output, 9);
if (i < 0)
{
printf("write() of C1 command failed!\n\r");
succes=0;
TryCount++;
}
if(TryCount==Try_Again_Max)
{
printf("Error at sending, Errorcode 0x01\n\r");
close(PSERIAL);
return 0x01;
}
else
{
printf("RS485 send was succesfull \n\r");
succes=1;
}
}
usleep(50000);
i=0;
TimeNow =ntp_time();
TimeSo = TimeNow+Timout_Sec;
while(i<1) //Timeout after a several secconds?
{
i=read(PSERIAL, input, sizeof(input));
TimeNow =ntp_time();
if(TimeNow==TimeSo)
{
printf("Timeout at receiving, Errorcode 0x20\n\r");
return 0x20;
}
}
for(j=0; j<i; j++)
printf("%x ",input[j]);
printf("\n\r");
usleep(50000);
TargetID[0] = input[2];
TargetID[1] = input[3];
// Now we know the ID, we can ask for monitordata
output[0] = TargetID[0];
output[1] = TargetID[1];
output[2] = MY_ID_L;
output[3] = MY_ID_H;
output[4] = 0x07;
output[5] = 0x10;
output[6] = 0xA4;
output[7] = 0x00;
output[8] = Get_Checksum(8);
i=0;
TryCount=0;
succes=0;
while(!succes)
{
i=write (PSERIAL, output, 9);
if (i < 0)
{
printf("write() of B6 command failed!\n\r");
succes=0;
TryCount++;
}
if(TryCount==Try_Again_Max)
{
printf("Error at sending, Errorcode 0x02\n\r");
close(PSERIAL);
return 0x02;
}
else
{
printf("RS485 send was succesfull \n\r");
succes=1;
}
}
usleep(50000);
printf("reading information\n\r");
i=0;
TimeNow =ntp_time();
TimeSo = TimeNow+Timout_Sec;
while(i<1) //Timeout after a several seconds?
{
i=read(PSERIAL, input, sizeof(input));
TimeNow = ntp_time();
if(TimeNow==TimeSo)
{
printf("Timeout at receiving, Errorcode 0x20\n\r");
close(PSERIAL);
return 0x20;
}
}
//for(j=0; j<i; j++)
//printf("%x ",input[j]);
//printf("\n\r");
close(PSERIAL); //Done, and close the connection
Power = Serial_to_int(&input[18], 2);
//printf("Actual Power is %d\n\r", Power);
Rotation = Serial_to_int(&input[20], 3);
//printf("Actual Rotation is %f\n\r", Rotation);
ntptime=ntp_time();
ntptime= ntptime << 32;
Create_file(ntptime, Power, Rotation); //this function has to be more complete
usleep(50000);
fflush(stdout);
fflush(stdin);
printf("C-code is finished %\n\r");
}
return 1;
}
static long long unsigned ntp_time(void)
{
time_t sec=0;
sec = time(NULL) + 2208988800;
return sec;
}
static int Create_file(long long unsigned ntptime, int Power, float Rotation)
{
int errorhandler;
FILE *PFILE;
char buffer[10];
int lenght;
int i=0;
Rotation = Rotation / 100;
printf("the timestamp is %llu\n\r",ntptime);
lenght = my_itoa(Power, buffer);
PFILE = fopen ("jsondata","w");
if (PFILE==NULL)
{
printf("Could not make JSONDATA, closing program\n\r");
return 200;
}
printf("Creating File\n\r");
errorhandler=fprintf(PFILE,"The Power is %d \n\r"
"The Rotation is %F \n\r"
"Timestamp is %llu\n\r",Power, Rotation, ntptime);
if(errorhandler<1)
{
printf("fprintf failed, Errorcode 0x63\n\r");
fflush(PFILE);
fclose(PFILE);
return 0x63;
}
usleep(50000);
errorhandler=fflush (PFILE);
if(errorhandler !=0)
{
printf("failure 0x64\n\r");
return 0x64;
}
errorhandler=fclose (PFILE);
if(errorhandler != 0)
{
printf("failure 0x65\n\r");
return 0x65;
}
printf("Done Filewriting \n\r");
return 1;
}
//Addres first byte from input string, and number of bytes
static int Serial_to_int(unsigned char *SerialBytes, char NumberOfBytes)
{
int i=0;
int j=0;
int output=0;
while(NumberOfBytes>0)
{
output+= (SerialBytes[j] << i);
printf("byte is %x\n\r",SerialBytes[j]);
i+=8;
j++;
NumberOfBytes--;
}
return output;
}
static unsigned char Get_Checksum(int NumberOfBytes)
{
int j=0;
int i=0;
unsigned char outputt=0;
while(NumberOfBytes>0)
{
i += output[j];
j++;
NumberOfBytes--;
}
outputt = (i & 0xff);
return outputt;
}
static int my_itoa(int val, char* buf)
{
const unsigned int radix = 10;
char* p;
unsigned int a; //every digit
int len;
char* b; //start of the digit char
char temp;
unsigned int u;
p = buf;
if (val < 0)
{
*p++ = '-';
val = 0 - val;
}
u = (unsigned int)val;
b = p;
do
{
a = u % radix;
u /= radix;
*p++ = a + '0';
}
while (u > 0);
len = (int)(p - buf);
*p-- = 0;
//swap
do
{
temp = *p;
*p = *b;
*b = temp;
--p;
++b;
}
while (b < p);
return len;
}
