Hello everyone, i'm trying to develop RTEMS app using QEMU VM. How can i
use virtual serial device for two side data exchange between VM and host
machine. I'm trying to use it in that way:
#include <bsp.h> /* for device driver prototypes */
#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 20
#define CONFIGURE_APPLICATION_EXTRA_DRIVERS TTY2_DRIVER_TABLE_ENTRY
#define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK
#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
#define CONFIGURE_NUMBER_OF_TERMIOS_PORTS 6
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
.....
then in my app i'm trying to open /dev/ttyS2 device
unsigned char data[4] = {1,2,3,4};
int f =open("/dev/ttyS2", O_RDWR | O_NOCTTY | _FNDELAY);
if (f>0)
{
printf("write data %d\n",write(f,data,4));
}
then start QEMU
qemu-system-i386 -serial file:/tmp/1.txt -kernel zvezda_shell.exe
In QEMU shell i've seen
Device: /dev/ttyS2 initialized.
write data 4
But in fact file /tmp/1.txt has no data. How can i solve it and use QEMU
-serial for both side data exchange?
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