RT-Thread/STM32F103VB 0.3.0 beta3版本

发布于 2009-05-04 20:32:00 浏览：18248 订阅该版

31 个回答

pupist 2009-05-04

这家伙很懒，什么也没写！

bernard 2009-05-05

这家伙很懒，什么也没写！

bernard 2009-05-05

这家伙很懒，什么也没写！

LEAN 2009-05-07

这家伙很懒，什么也没写！

dragonwww 2009-05-15

这家伙很懒，什么也没写！

dragonwww 2009-05-15

这家伙很懒，什么也没写！

bernard 2009-05-15

这家伙很懒，什么也没写！

dragonwww 2009-05-15

这家伙很懒，什么也没写！

bernard 2009-05-15

这家伙很懒，什么也没写！

都会调用，static的调用只会在本文件有效。

是的，使用不同模式的串口，设置是比较复杂，例如UART2：

```

#ifdef RT_USING_UART2
/*
stm32_serial_int_rx，stm32_serial_dma_rx是中断模式和DMA模式下接收需要的数据结构。
采用不同的模式需要不同的数据结构，然后赋值到stm32_serial_device结构中：
struct stm32_serial_device
{
	USART_TypeDef* uart_device;

/* rx structure */
	struct stm32_serial_int_rx* int_rx;
	struct stm32_serial_dma_rx* dma_rx;

/* tx structure */
	struct stm32_serial_int_tx* int_tx;
	struct stm32_serial_dma_tx* dma_tx;
};
上面这个是stm32_serial_device结构的定义。
*/
struct stm32_serial_int_rx uart2_int_rx;
struct stm32_serial_dma_rx uart2_dma_rx;
struct stm32_serial_device uart2 = 
{
	USART2,
	&uart2_int_rx,
	&uart2_dma_rx,
	RT_NULL,
	RT_NULL
};
struct rt_device uart2_device;
#endif

/* 然后就是各个模式下的初始化，例如中断初始化，DMA初始化等 */
/*
 * Init all related hardware in here
 * rt_hw_serial_init() will register all supported USART device
 */
void rt_hw_usart_init()
{
	USART_InitTypeDef USART_InitStructure;
	USART_ClockInitTypeDef USART_ClockInitStructure;

/* 时钟初始化 */
	RCC_Configuration();
	
	/* GPIO复用初始化 */
	GPIO_Configuration();
	
	/* 中断初始化 */
	NVIC_Configuration();
	
	/* DMA初始化 */
	DMA_Configuration();
	/* 上面这几个初始化都用文件内的函数，因为已经声明为static了，只在文件内有效 */

/* uart init */
#ifdef RT_USING_UART1
	/* UART1的初始化 */
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
	USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
	USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
	USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
	USART_Init(USART1, &USART_InitStructure);
	USART_ClockInit(USART1, &USART_ClockInitStructure);

/* 在RT-Thread中注册设备 */
	rt_hw_serial_register(&uart1_device, "uart1", 
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
		&uart1);
	
	/* 因为是中断接收，所以需要配置中断 */
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
#endif

#ifdef RT_USING_UART2
	/* UART2初始化 */
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
	USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
	USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
	USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
	USART_Init(USART2, &USART_InitStructure);
	USART_ClockInit(USART2, &USART_ClockInitStructure);

/* 设置使用的DMA通道，STM32里DMA通道对外设是固定的，在文件头有份说明 */
	uart2_dma_rx.dma_channel= UART2_RX_DMA;
	
	/* 在RT-Thread中注册设备 */
	rt_hw_serial_register(&uart2_device, "uart2", 
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_RX,
		&uart2);

/* DMA方式接收，使能DMA接收请求(实际的接收并没开始，在Open这个设备时才真正开始) */
	USART_DMACmd(USART2, USART_DMAReq_Rx , ENABLE);
#endif

#ifdef RT_USING_UART3
	/* UART3初始化 */
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
	USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
	USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
	USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
	USART_Init(USART3, &USART_InitStructure);
	USART_ClockInit(USART3, &USART_ClockInitStructure);

/* DMA发送的channel */
	uart3_dma_tx.dma_channel= UART3_TX_DMA;

/* 在RT-Thread中注册设备 */
	rt_hw_serial_register(&uart3_device, "uart3", 
		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_TX,
		&uart3);

/* 使能DMA发送请求，但只在往设备写的时候才开始传送数据 */
	USART_DMACmd(USART3, USART_DMAReq_Tx , ENABLE);

/* 中断方式接收，所以还需要配置接收中断 */
	USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
#endif
}

```

有问题尽管提出来，我看到了会直接解答的。