196 lines
5.1 KiB
C
196 lines
5.1 KiB
C
/*
|
|
* 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 <serial.h>
|
|
#include <stm32f2xx.h>
|
|
#include <stm32f2xx_dma.h>
|
|
|
|
/*
|
|
* Use UART1 as console output and finsh input
|
|
* interrupt Rx and poll Tx (stream mode)
|
|
*
|
|
* Use UART2 with interrupt Rx and poll Tx
|
|
* Use UART3 with DMA Tx and interrupt Rx -- DMA channel 2
|
|
*
|
|
* USART DMA setting on STM32
|
|
* USART1 Tx --> DMA Channel 4
|
|
* USART1 Rx --> DMA Channel 5
|
|
* USART2 Tx --> DMA Channel 7
|
|
* USART2 Rx --> DMA Channel 6
|
|
* USART3 Tx --> DMA Channel 2
|
|
* USART3 Rx --> DMA Channel 3
|
|
*/
|
|
|
|
#ifdef RT_USING_UART1
|
|
struct stm32_serial_int_rx uart1_int_rx;
|
|
struct stm32_serial_device uart1 =
|
|
{
|
|
USART1,
|
|
&uart1_int_rx,
|
|
RT_NULL
|
|
};
|
|
struct rt_device uart1_device;
|
|
#endif
|
|
|
|
#ifdef RT_USING_UART2
|
|
struct stm32_serial_int_rx uart2_int_rx;
|
|
struct stm32_serial_device uart2 =
|
|
{
|
|
USART2,
|
|
&uart2_int_rx,
|
|
RT_NULL
|
|
};
|
|
struct rt_device uart2_device;
|
|
#endif
|
|
|
|
#ifdef RT_USING_UART3
|
|
struct stm32_serial_int_rx uart3_int_rx;
|
|
struct stm32_serial_dma_tx uart3_dma_tx;
|
|
struct stm32_serial_device uart3 =
|
|
{
|
|
USART3,
|
|
&uart3_int_rx,
|
|
&uart3_dma_tx
|
|
};
|
|
struct rt_device uart3_device;
|
|
#endif
|
|
|
|
#define USART1_DR_Base 0x40013804
|
|
#define USART2_DR_Base 0x40004404
|
|
#define USART3_DR_Base 0x40004804
|
|
|
|
/* USART1_REMAP = 0 */
|
|
#define UART1_GPIO_TX GPIO_Pin_9
|
|
#define UART1_GPIO_RX GPIO_Pin_10
|
|
#define UART1_GPIO GPIOA
|
|
#define RCC_APBPeriph_UART1 RCC_APB2Periph_USART1
|
|
#define UART1_TX_DMA DMA1_Channel4
|
|
#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 */
|
|
#define UART2_GPIO_TX GPIO_Pin_2
|
|
#define UART2_GPIO_RX GPIO_Pin_3
|
|
#define UART2_GPIO GPIOA
|
|
#define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2
|
|
#define UART2_TX_DMA DMA1_Channel7
|
|
#define UART2_RX_DMA DMA1_Channel6
|
|
#endif
|
|
|
|
/* USART3_REMAP[1:0] = 00 */
|
|
#define UART3_GPIO_RX GPIO_Pin_11
|
|
#define UART3_GPIO_TX GPIO_Pin_10
|
|
#define UART3_GPIO GPIOB
|
|
#define RCC_APBPeriph_UART3 RCC_APB1Periph_USART3
|
|
#define UART3_TX_DMA DMA1_Channel2
|
|
#define UART3_RX_DMA DMA1_Channel3
|
|
|
|
static void RCC_Configuration(void)
|
|
{
|
|
#ifdef RT_USING_UART1
|
|
/* Enable USART1 and GPIOA clocks */
|
|
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
|
|
#endif
|
|
}
|
|
|
|
static void GPIO_Configuration(void)
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStruct;
|
|
|
|
#ifdef RT_USING_UART1
|
|
GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF;
|
|
GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
|
|
GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
|
|
GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
|
|
|
|
GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9|GPIO_Pin_10;
|
|
GPIO_Init(GPIOA,&GPIO_InitStruct);
|
|
|
|
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
|
|
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
|
|
#endif
|
|
}
|
|
|
|
static void NVIC_Configuration(void)
|
|
{
|
|
NVIC_InitTypeDef NVIC_InitStructure;
|
|
|
|
#ifdef RT_USING_UART1
|
|
/* Enable the USART1 Interrupt */
|
|
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
|
|
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
|
|
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
|
|
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStructure);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
RCC_Configuration();
|
|
|
|
GPIO_Configuration();
|
|
|
|
NVIC_Configuration();
|
|
|
|
/* uart init */
|
|
#ifdef RT_USING_UART1
|
|
USART_DeInit(USART1);
|
|
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_Init(USART1, &USART_InitStructure);
|
|
|
|
/* register uart1 */
|
|
rt_hw_serial_register(&uart1_device, "uart1",
|
|
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
|
|
&uart1);
|
|
|
|
/* enable interrupt */
|
|
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
|
|
/* Enable USART1 */
|
|
USART_Cmd(USART1, ENABLE);
|
|
USART_ClearFlag(USART1,USART_FLAG_TXE);
|
|
#endif
|
|
}
|
|
|
|
void USART1_IRQHandler()
|
|
{
|
|
/* enter interrupt */
|
|
rt_interrupt_enter();
|
|
|
|
rt_hw_serial_isr(&uart1_device);
|
|
|
|
/* leave interrupt */
|
|
rt_interrupt_leave();
|
|
}
|