Function rt_console_isr

bsp/x86/drivers/console.c:214–273

}

static void rt_console_isr(int vector, void* param)
{
    char c;
    rt_bool_t ret;
    rt_base_t level;

    if(INTUART0_RX == vector)
    {
        c = rt_serial_getc();
        ret = RT_TRUE;
    }
    else
    {
        rt_keyboard_isr();
        ret = rt_keyboard_getc(&c);
    }

    if(ret == RT_FALSE)
    {
        /* do nothing */
    }
    else
    {
        /* disable interrupt */
        level = rt_hw_interrupt_disable();

        /* save character */
        rx_buffer[save_index] = c;
        save_index ++;
        if (save_index >= CONSOLE_RX_BUFFER_SIZE)
            save_index = 0;

        /* if the next position is read index, discard this 'read char' */
        if (save_index == read_index)
        {
            read_index ++;
            if (read_index >= CONSOLE_RX_BUFFER_SIZE)
                read_index = 0;
        }

        /* enable interrupt */
        rt_hw_interrupt_enable(level);
    }

    /* invoke callback */
    if (console_device.rx_indicate != RT_NULL)
    {
        rt_size_t rx_length;

        /* get rx length */
        rx_length = read_index > save_index ?
            CONSOLE_RX_BUFFER_SIZE - read_index + save_index :
            save_index - read_index;

        if(rx_length > 0)
        {
            console_device.rx_indicate(&console_device, rx_length);
        }