/**
* @brief closes sci peripheral of interrupt driven driver
*
* calls tms570_sci_poll_last_close and disables interrupts
*
* @param[in] tty Termios control
* @param[in] base context of the driver
* @param[in] args
* @retval false Error occured during initialization
* @retval true Driver is open and ready
*/
static void tms570_sci_interrupt_last_close(
rtems_termios_tty *tty,
rtems_termios_device_context *base,
rtems_libio_open_close_args_t *args
)
{
tms570_sci_context *ctx = (tms570_sci_context *) base;
rtems_interrupt_lock_context lock_context;
rtems_interval tw;
int32_t baudrate;
/* Turn off RX interrupts */
rtems_termios_device_lock_acquire(base, &lock_context);
tms570_sci_disable_interrupts(ctx);
rtems_termios_device_lock_release(base, &lock_context);
tw = rtems_clock_get_ticks_per_second();
baudrate = rtems_termios_baud_to_number(cfgetospeed(&tty->termios));
tw = tw * 10 / baudrate + 1;
while ( ( ctx->regs->FLR & TMS570_SCI_FLR_TX_EMPTY ) == 0 ) {
rtems_task_wake_after(tw);
}
/* uninstall ISR */
rtems_interrupt_handler_remove(ctx->irq, tms570_sci_interrupt_handler, tty);
tms570_sci_poll_last_close(tty, base, args);
}
/**
* @brief closes sci peripheral of interrupt driven driver
*
* calls tms570_sci_poll_last_close and disables interrupts
*
* @param[in] tty Termios control
* @param[in] base context of the driver
* @param[in] args
* @retval false Error occured during initialization
* @retval true Driver is open and ready
*/
static void tms570_sci_interrupt_last_close(
rtems_termios_tty *tty,
rtems_termios_device_context *base,
rtems_libio_open_close_args_t *args
)
{
tms570_sci_context *ctx = (tms570_sci_context *) base;
rtems_interrupt_lock_context lock_context;
/* Turn off RX interrupts */
rtems_termios_device_lock_acquire(base, &lock_context);
tms570_sci_disable_interrupts(ctx);
rtems_termios_device_lock_release(base, &lock_context);
/* Flush device */
while ( ( ctx->regs->FLR & TMS570_SCI_FLR_TX_EMPTY ) > 0 ) {
;/* Wait until all data has been sent */
}
/* uninstall ISR */
rtems_interrupt_handler_remove(ctx->irq, tms570_sci_interrupt_handler, tty);
tms570_sci_poll_last_close(tty, base, args);
}
