请教：串口 RT_DEVICE_FLAG_INT_TX 方式出现问题

发布于 2013-03-23 01:25:10 浏览：3036 订阅该版

stm32f103ze
RT_Thread v1.1.0

串口我用来发数据，所以串口初始化为RT_DEVICE_FLAG_INT_TX ，但会停止serial_ringbuffer_putchar 函数里，初始化为RT_DEVICE_FLAG_STREAM就没有问题，不知道是什么问题

初始化代码：
```void rt_hw_usart_init(void)
{
	struct stm32_uart* uart;
	struct serial_configure config;

RCC_Configuration();
	GPIO_Configuration();

#ifdef RT_USING_UART1
	uart = &uart1;
	config.baud_rate = BAUD_RATE_1200;
	config.bit_order = BIT_ORDER_LSB;
	config.data_bits = DATA_BITS_8;
	config.parity    = PARITY_NONE;
	config.stop_bits = STOP_BITS_1;
	config.invert    = NRZ_NORMAL;

serial1.ops    = &stm32_uart_ops;
	serial1.int_rx = &uart1_int_rx;
	serial1.config = config;

NVIC_Configuration(&uart1);

/* register UART1 device */
	rt_hw_serial_register(&serial1, "uart1",
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
		uart);
#endif

#ifdef RT_USING_UART2
	uart = &uart2;

config.baud_rate = BAUD_RATE_57600;
	config.bit_order = BIT_ORDER_LSB;
	config.data_bits = DATA_BITS_8;
	config.parity    = PARITY_NONE;
	config.stop_bits = STOP_BITS_1;
	config.invert    = NRZ_NORMAL;

serial2.ops    = &stm32_uart_ops;
	serial2.int_rx = &uart2_int_rx;
	serial2.config = config;

NVIC_Configuration(&uart2);

/* register UART1 device */
	rt_hw_serial_register(&serial2, "uart2",
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
		uart);
#endif

#ifdef RT_USING_UART3
	uart = &uart3;

config.baud_rate = BAUD_RATE_2400;
	config.bit_order = BIT_ORDER_LSB;
	config.data_bits = DATA_BITS_9;
	config.parity    = PARITY_EVEN;
	config.stop_bits = STOP_BITS_1;
	config.invert    = NRZ_NORMAL;

serial3.ops    = &stm32_uart_ops;
	serial3.int_rx = &uart3_int_rx;
	serial3.config = config;

NVIC_Configuration(&uart3);

/* register UART3 device */
	rt_hw_serial_register(&serial3, "uart3",
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
		uart);
#endif

#ifdef RT_USING_UART4
	uart = &uart4;

config.baud_rate = BAUD_RATE_9600;
	config.bit_order = BIT_ORDER_LSB;
	config.data_bits = DATA_BITS_8;
	config.parity    = PARITY_NONE;
	config.stop_bits = STOP_BITS_1;
	config.invert    = NRZ_NORMAL;

serial4.ops    = &stm32_uart_ops;
	serial4.int_rx = &uart4_int_rx;
	serial4.config = config;

NVIC_Configuration(&uart4);

/* register UART4 device */
	rt_hw_serial_register(&serial4, "uart4",
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
		uart);
#endif

#ifdef RT_USING_UART5
	uart = &uart5;

config.baud_rate = BAUD_RATE_2400;
	config.bit_order = BIT_ORDER_LSB;
	config.data_bits = DATA_BITS_9;
	config.parity    = PARITY_EVEN;
	config.stop_bits = STOP_BITS_1;
	config.invert    = NRZ_NORMAL;

serial5.ops    = &stm32_uart_ops;
	serial5.int_rx = &uart5_int_rx;
	serial5.config = config;

NVIC_Configuration(&uart5);

/* register UART5 device */
	rt_hw_serial_register(&serial5, "uart5",
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
		uart);
#endif
}

rt_inline int serial_ringbuffer_putchar(struct serial_ringbuffer *rbuffer,
                                        char                      ch)
{
    rt_base_t level;
    rt_uint16_t next_index;

/* disable interrupt */
    level = rt_hw_interrupt_disable();

next_index = (rbuffer->put_index + 1) & (SERIAL_RBUFFER_SIZE - 1);
    if (next_index != rbuffer->get_index)
    {
        rbuffer->buffer[rbuffer->put_index] = ch; // 停止这里
        rbuffer->put_index = next_index;
    }
    else
    {
        /* enable interrupt */
        rt_hw_interrupt_enable(level);

return -1;
    }

/* enable interrupt */
    rt_hw_interrupt_enable(level);

return 1;
}```