C program to read data from USB device connected to the system

Question

I am trying to fetch data from the USB device (say pendrive) connected to the USB port of a system. Here, I am able to open the device file and read some random raw data. But I

Answer 1

you will need to set the correct port configuration...

struct termios oldtio,newtio;

// open port...
// save existing attributes
tcgetattr(fd,&oldtio);  

// set attributes - these flags may change for your device
#define BAUDRATE B9600 
memset(&newtio, 0x00, sizeof(newtio));  
newtio.c_cflag = BAUDRATE | CRTSCTS | CS8 | CLOCAL | CREAD;   
newtio.c_iflag = IGNPAR | ICRNL;          
newtio.c_oflag = 0;  

tcflush(fd, TCIFLUSH);  
tcsetattr(fd,TCSANOW,&newtio); 

//reset attributes
tcsetattr(fd,TCSANOW,&oldtio); 

I have a rough working example here... http://file-hub.com/cmd:thread/142300