I am using STM32F4, and i am able to transmit files through FTP using netconn.I will read the files from SD card (each time 256 bytes ) and I will send to server. If I am transmitting 10 files, few of them are corrupted, but even though the file size became same. The file start get corrected from the first byte of a packet(some times it will be 10th or 15th packet or any random packet - some times no failure).
FTP send function is here.
FunctionStatus FtpSendFile(char *filename, char *Serverfilename)
{
sprintf(file_upload,"STOR WRITE.txt\r\n");
err_t err12=netconn_write(conn_ftpcmd,file_upload,(int)strlen(file_upload),NULL);
netconn_recv(conn_ftpcmd,&ftp_receive_netbuf);
netbuf_data(ftp_receive_netbuf,(void**)&ftpbuf,&receiverbef_len);
netbuf_delete(ftp_receive_netbuf);
while(remainingdatatoread)
{
datatoread = remainingdatatoread > maxnoofbytestoreadatatime ? maxnoofbytestoreadatatime : remainingdatatoread;
fresult = f_read(&filponter, RdData,datatoread, &testbyteread);
if(fresult)
return FILE_READING_FAILURE;
totalbytes = totalbytes + testbyteread;
f_lseek(&filponter, totalbytes);
remainingdatatoread = remainingdatatoread - testbyteread;
err12=netconn_write(newconn,RdData,testbyteread,NULL); // Sending data into the file.
if(err12)
return FILE_SENDING_TO_SERVER_FAILURE;
HAL_Delay(1);
memset(RdData,'\0',testbyteread);
}
f_close(&filponter);
return FILESENDSUCCESSFULLY;
}
