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提交 60736915 编写于 作者: wuyangyong's avatar wuyangyong
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remove interrupt Tx and DMA Rx mode in USART. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@559 bbd45198-f89e-11dd-88c7-29a3b14d5316
上级 34e894f8
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Showing with 211 addition and 205 deletion
bsp/stm32_radio/usart.c
浏览文件 @ 60736915
/*
* File : usart.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard the first version
* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
*/
#include "usart.h" #include "usart.h"
#include <serial.h> #include <serial.h>
#include <stm32f10x_dma.h>
#include "stm32f10x.h"
/* /*
* Use UART1 as console output and finsh input * Use UART1 as console output and finsh input
* interrupt Rx and poll Tx (stream mode) * interrupt Rx and poll Tx (stream mode)
* *
* Use UART2 with DMA Rx and poll Tx -- DMA channel 6 * Use UART2 with interrupt Rx and poll Tx
* Use UART3 with DMA Tx and interrupt Rx -- DMA channel 2 * Use UART3 with DMA Tx and interrupt Rx -- DMA channel 2
* *
* USART DMA setting on STM32 * USART DMA setting on STM32
...@@ -23,25 +37,20 @@ ...@@ -23,25 +37,20 @@
struct stm32_serial_int_rx uart1_int_rx; struct stm32_serial_int_rx uart1_int_rx;
struct stm32_serial_device uart1 = struct stm32_serial_device uart1 =
{ {
USART1, USART1,
&uart1_int_rx, &uart1_int_rx,
RT_NULL, RT_NULL
RT_NULL,
RT_NULL
}; };
struct rt_device uart1_device; struct rt_device uart1_device;
#endif #endif
#ifdef RT_USING_UART2 #ifdef RT_USING_UART2
struct stm32_serial_int_rx uart2_int_rx; struct stm32_serial_int_rx uart2_int_rx;
struct stm32_serial_dma_rx uart2_dma_rx;
struct stm32_serial_device uart2 = struct stm32_serial_device uart2 =
{ {
USART2, USART2,
&uart2_int_rx, &uart2_int_rx,
&uart2_dma_rx, RT_NULL
RT_NULL,
RT_NULL
}; };
struct rt_device uart2_device; struct rt_device uart2_device;
#endif #endif
...@@ -51,11 +60,9 @@ struct stm32_serial_int_rx uart3_int_rx; ...@@ -51,11 +60,9 @@ struct stm32_serial_int_rx uart3_int_rx;
struct stm32_serial_dma_tx uart3_dma_tx; struct stm32_serial_dma_tx uart3_dma_tx;
struct stm32_serial_device uart3 = struct stm32_serial_device uart3 =
{ {
USART3, USART3,
&uart3_int_rx, &uart3_int_rx,
RT_NULL, &uart3_dma_tx
RT_NULL,
&uart3_dma_tx
}; };
struct rt_device uart3_device; struct rt_device uart3_device;
#endif #endif
...@@ -65,13 +72,19 @@ struct rt_device uart3_device; ...@@ -65,13 +72,19 @@ struct rt_device uart3_device;
#define USART3_DR_Base 0x40004804 #define USART3_DR_Base 0x40004804
/* USART1_REMAP = 0 */ /* USART1_REMAP = 0 */
#define UART1_GPIO_TX GPIO_Pin_9 #define UART1_GPIO_TX GPIO_Pin_9
#define UART1_GPIO_RX GPIO_Pin_10 #define UART1_GPIO_RX GPIO_Pin_10
#define UART1_GPIO GPIOA #define UART1_GPIO GPIOA
#define RCC_APBPeriph_UART1 RCC_APB2Periph_USART1 #define RCC_APBPeriph_UART1 RCC_APB2Periph_USART1
#define UART1_TX_DMA DMA1_Channel4 #define UART1_TX_DMA DMA1_Channel4
#define UART1_RX_DMA DMA1_Channel5 #define UART1_RX_DMA DMA1_Channel5
#if defined(STM32F10X_LD) || defined(STM32F10X_MD) || defined(STM32F10X_CL)
#define UART2_GPIO_TX GPIO_Pin_5
#define UART2_GPIO_RX GPIO_Pin_6
#define UART2_GPIO GPIOD
#define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2
#else /* for STM32F10X_HD */
/* USART2_REMAP = 0 */ /* USART2_REMAP = 0 */
#define UART2_GPIO_TX GPIO_Pin_2 #define UART2_GPIO_TX GPIO_Pin_2
#define UART2_GPIO_RX GPIO_Pin_3 #define UART2_GPIO_RX GPIO_Pin_3
...@@ -79,6 +92,7 @@ struct rt_device uart3_device; ...@@ -79,6 +92,7 @@ struct rt_device uart3_device;
#define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2 #define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2
#define UART2_TX_DMA DMA1_Channel7 #define UART2_TX_DMA DMA1_Channel7
#define UART2_RX_DMA DMA1_Channel6 #define UART2_RX_DMA DMA1_Channel6
#endif
/* USART3_REMAP[1:0] = 00 */ /* USART3_REMAP[1:0] = 00 */
#define UART3_GPIO_RX GPIO_Pin_11 #define UART3_GPIO_RX GPIO_Pin_11
...@@ -90,245 +104,237 @@ struct rt_device uart3_device; ...@@ -90,245 +104,237 @@ struct rt_device uart3_device;
static void RCC_Configuration(void) static void RCC_Configuration(void)
{ {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
#ifdef RT_USING_UART1 #ifdef RT_USING_UART1
/* Enable USART1 and GPIOA clocks */ /* Enable USART1 and GPIOA clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
#endif #endif
#ifdef RT_USING_UART2 #ifdef RT_USING_UART2
/* Enable GPIOD clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); #if (defined(STM32F10X_LD) || defined(STM32F10X_MD) || defined(STM32F10X_CL))
/* Enable USART2 clock */ /* Enable AFIO and GPIOD clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOD, ENABLE);
/* Enable the USART2 Pins Software Remapping */
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#else
/* Enable AFIO and GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA, ENABLE);
#endif #endif
#ifdef RT_USING_UART3 /* Enable USART2 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
/* Enable USART3 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
#endif #endif
#if defined (RT_USING_UART2) || defined (RT_USING_UART3) #ifdef RT_USING_UART3
/* DMA clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); /* Enable USART3 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
/* DMA clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
#endif #endif
} }
static void GPIO_Configuration(void) static void GPIO_Configuration(void)
{ {
GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitTypeDef GPIO_InitStructure;
#ifdef RT_USING_UART1 #ifdef RT_USING_UART1
/* Configure USART1 Rx (PA.10) as input floating */ /* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = UART1_GPIO_RX; GPIO_InitStructure.GPIO_Pin = UART1_GPIO_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(UART1_GPIO, &GPIO_InitStructure); GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
/* Configure USART1 Tx (PA.09) as alternate function push-pull */ /* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = UART1_GPIO_TX; GPIO_InitStructure.GPIO_Pin = UART1_GPIO_TX;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(UART1_GPIO, &GPIO_InitStructure); GPIO_Init(UART1_GPIO, &GPIO_InitStructure);
#endif #endif
#ifdef RT_USING_UART2 #ifdef RT_USING_UART2
/* Configure USART2 Rx as input floating */ /* Configure USART2 Rx as input floating */
GPIO_InitStructure.GPIO_Pin = UART2_GPIO_RX; GPIO_InitStructure.GPIO_Pin = UART2_GPIO_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(UART2_GPIO, &GPIO_InitStructure); GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
/* Configure USART2 Tx as alternate function push-pull */ /* Configure USART2 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = UART2_GPIO_TX; GPIO_InitStructure.GPIO_Pin = UART2_GPIO_TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(UART2_GPIO, &GPIO_InitStructure); GPIO_Init(UART2_GPIO, &GPIO_InitStructure);
#endif #endif
#ifdef RT_USING_UART3 #ifdef RT_USING_UART3
/* Configure USART3 Rx as input floating */ /* Configure USART3 Rx as input floating */
GPIO_InitStructure.GPIO_Pin = UART3_GPIO_RX; GPIO_InitStructure.GPIO_Pin = UART3_GPIO_RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(UART3_GPIO, &GPIO_InitStructure); GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
/* Configure USART3 Tx as alternate function push-pull */ /* Configure USART3 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = UART3_GPIO_TX; GPIO_InitStructure.GPIO_Pin = UART3_GPIO_TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(UART3_GPIO, &GPIO_InitStructure); GPIO_Init(UART3_GPIO, &GPIO_InitStructure);
#endif #endif
} }
static void NVIC_Configuration(void) static void NVIC_Configuration(void)
{ {
NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
#ifdef RT_USING_UART1 #ifdef RT_USING_UART1
/* Enable the USART1 Interrupt */ /* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); NVIC_Init(&NVIC_InitStructure);
#endif #endif
#ifdef RT_USING_UART2 #ifdef RT_USING_UART2
/* Enable the USART2 Interrupt */ /* Enable the USART2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel; NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); NVIC_Init(&NVIC_InitStructure);
/* Enable the DMA1 Channel6 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif #endif
#ifdef RT_USING_UART3 #ifdef RT_USING_UART3
/* Enable the USART3 Interrupt */ /* Enable the USART3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQChannel; NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); NVIC_Init(&NVIC_InitStructure);
/* Enable the DMA1 Channel2 Interrupt */ /* Enable the DMA1 Channel2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQChannel; NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); NVIC_Init(&NVIC_InitStructure);
#endif #endif
} }
static void DMA_Configuration(void) static void DMA_Configuration(void)
{ {
#if defined(RT_USING_UART2) || defined (RT_USING_UART3) #if defined (RT_USING_UART3)
DMA_InitTypeDef DMA_InitStructure; DMA_InitTypeDef DMA_InitStructure;
/* fill init structure */ /* fill init structure */
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
#endif
/* DMA1 Channel5 (triggered by USART3 Tx event) Config */
#ifdef RT_USING_UART2 DMA_DeInit(UART3_TX_DMA);
/* DMA1 Channel4 (triggered by USART2 Rx event) Config */ DMA_InitStructure.DMA_PeripheralBaseAddr = USART3_DR_Base;
DMA_DeInit(UART2_RX_DMA); DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_PeripheralBaseAddr = USART2_DR_Base; DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = 0;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0; DMA_Init(UART3_TX_DMA, &DMA_InitStructure);
DMA_InitStructure.DMA_BufferSize = 0; DMA_ITConfig(UART3_TX_DMA, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_Init(UART2_RX_DMA, &DMA_InitStructure); DMA_ClearFlag(DMA1_FLAG_TC5);
DMA_ITConfig(UART2_RX_DMA, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_ClearFlag(DMA1_FLAG_TC4);
#endif
#ifdef RT_USING_UART3
/* DMA1 Channel5 (triggered by USART3 Tx event) Config */
DMA_DeInit(UART3_TX_DMA);
DMA_InitStructure.DMA_PeripheralBaseAddr = USART3_DR_Base;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0;
DMA_InitStructure.DMA_BufferSize = 0;
DMA_Init(UART3_TX_DMA, &DMA_InitStructure);
DMA_ITConfig(UART3_TX_DMA, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_ClearFlag(DMA1_FLAG_TC5);
#endif #endif
} }
/* /*
* Init all related hardware in here * Init all related hardware in here
* rt_hw_usart_init() will register all supported USART device * rt_hw_serial_init() will register all supported USART device
*/ */
void rt_hw_usart_init() void rt_hw_usart_init()
{ {
USART_InitTypeDef USART_InitStructure; USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure; USART_ClockInitTypeDef USART_ClockInitStructure;
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
RCC_Configuration(); DMA_Configuration();
GPIO_Configuration();
NVIC_Configuration();
DMA_Configuration();
/* uart init */ /* uart init */
#ifdef RT_USING_UART1 #ifdef RT_USING_UART1
USART_InitStructure.USART_BaudRate = 115200; USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART1, &USART_InitStructure); USART_Init(USART1, &USART_InitStructure);
USART_ClockInit(USART1, &USART_ClockInitStructure); USART_ClockInit(USART1, &USART_ClockInitStructure);
/* register uart1 */ /* register uart1 */
rt_hw_serial_register(&uart1_device, "uart1", rt_hw_serial_register(&uart1_device, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart1); &uart1);
/* enable interrupt */ /* enable interrupt */
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
#endif #endif
#ifdef RT_USING_UART2 #ifdef RT_USING_UART2
USART_InitStructure.USART_BaudRate = 115200; USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART2, &USART_InitStructure); USART_Init(USART2, &USART_InitStructure);
USART_ClockInit(USART2, &USART_ClockInitStructure); USART_ClockInit(USART2, &USART_ClockInitStructure);
uart2_dma_rx.dma_channel= UART2_RX_DMA; /* register uart2 */
rt_hw_serial_register(&uart2_device, "uart2",
/* register uart2 */ RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
rt_hw_serial_register(&uart2_device, "uart2", &uart2);
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_RX,
&uart2); /* Enable USART2 DMA Rx request */
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
/* Enable USART2 DMA Rx request */
USART_DMACmd(USART2, USART_DMAReq_Rx , ENABLE);
#endif #endif
#ifdef RT_USING_UART3 #ifdef RT_USING_UART3
USART_InitStructure.USART_BaudRate = 115200; USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_Init(USART3, &USART_InitStructure); USART_Init(USART3, &USART_InitStructure);
USART_ClockInit(USART3, &USART_ClockInitStructure); USART_ClockInit(USART3, &USART_ClockInitStructure);
uart3_dma_tx.dma_channel= UART3_TX_DMA; uart3_dma_tx.dma_channel= UART3_TX_DMA;
/* register uart3 */ /* register uart3 */
rt_hw_serial_register(&uart3_device, "uart3", rt_hw_serial_register(&uart3_device, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_TX, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_TX,
&uart3); &uart3);
/* Enable USART3 DMA Tx request */ /* Enable USART3 DMA Tx request */
USART_DMACmd(USART3, USART_DMAReq_Tx , ENABLE); USART_DMACmd(USART3, USART_DMAReq_Tx , ENABLE);
/* enable interrupt */ /* enable interrupt */
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
#endif #endif
} }
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