282 lines
7.5 KiB
C
282 lines
7.5 KiB
C
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/*
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* File : usart.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2009-01-05 Bernard the first version
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* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
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*/
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#include "usart.h"
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#include <serial.h>
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#include <stm32f2xx.h>
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#include <stm32f2xx_dma.h>
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/*
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* Use UART1 as console output and finsh input
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* interrupt Rx and poll Tx (stream mode)
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*
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* Use UART2 with interrupt Rx and poll Tx
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* Use UART3 with DMA Tx and interrupt Rx -- DMA channel 2
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*
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* USART DMA setting on STM32
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* USART1 Tx --> DMA Channel 4
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* USART1 Rx --> DMA Channel 5
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* USART2 Tx --> DMA Channel 7
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* USART2 Rx --> DMA Channel 6
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* USART3 Tx --> DMA Channel 2
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* USART3 Rx --> DMA Channel 3
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*/
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#ifdef RT_USING_UART1
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struct stm32_serial_int_rx uart1_int_rx;
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struct stm32_serial_device uart1 =
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{
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USART1,
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&uart1_int_rx,
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RT_NULL
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};
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struct rt_device uart1_device;
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#endif
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#ifdef RT_USING_UART6
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struct stm32_serial_int_rx uart6_int_rx;
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struct stm32_serial_device uart6 =
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{
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USART6,
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&uart6_int_rx,
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RT_NULL
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};
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struct rt_device uart6_device;
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#endif
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#ifdef RT_USING_UART2
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struct stm32_serial_int_rx uart2_int_rx;
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struct stm32_serial_device uart2 =
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{
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USART2,
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&uart2_int_rx,
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RT_NULL
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};
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struct rt_device uart2_device;
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#endif
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#ifdef RT_USING_UART3
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struct stm32_serial_int_rx uart3_int_rx;
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struct stm32_serial_dma_tx uart3_dma_tx;
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struct stm32_serial_device uart3 =
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{
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USART3,
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&uart3_int_rx,
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&uart3_dma_tx
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};
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struct rt_device uart3_device;
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#endif
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#define USART1_DR_Base 0x40013804
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#define USART2_DR_Base 0x40004404
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#define USART3_DR_Base 0x40004804
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/* USART1_REMAP = 0 */
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#define UART1_GPIO_TX GPIO_Pin_9
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#define UART1_GPIO_RX GPIO_Pin_10
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#define UART1_GPIO GPIOA
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#define RCC_APBPeriph_UART1 RCC_APB2Periph_USART1
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#define UART1_TX_DMA DMA1_Channel4
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#define UART1_RX_DMA DMA1_Channel5
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#if defined(STM32F10X_LD) || defined(STM32F10X_MD) || defined(STM32F10X_CL)
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#define UART2_GPIO_TX GPIO_Pin_5
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#define UART2_GPIO_RX GPIO_Pin_6
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#define UART2_GPIO GPIOD
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#define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2
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#else /* for STM32F10X_HD */
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/* USART2_REMAP = 0 */
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#define UART2_GPIO_TX GPIO_Pin_2
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#define UART2_GPIO_RX GPIO_Pin_3
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#define UART2_GPIO GPIOA
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#define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2
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#define UART2_TX_DMA DMA1_Channel7
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#define UART2_RX_DMA DMA1_Channel6
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#endif
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/* USART3_REMAP[1:0] = 00 */
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#define UART3_GPIO_RX GPIO_Pin_11
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#define UART3_GPIO_TX GPIO_Pin_10
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#define UART3_GPIO GPIOB
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#define RCC_APBPeriph_UART3 RCC_APB1Periph_USART3
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#define UART3_TX_DMA DMA1_Channel2
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#define UART3_RX_DMA DMA1_Channel3
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/* USART6_REMAP = 0 */
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#define UART6_GPIO_TX GPIO_Pin_6
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#define UART6_GPIO_RX GPIO_Pin_7
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#define UART6_GPIO GPIOC
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#define RCC_APBPeriph_UART6 RCC_APB2Periph_USART6
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//#define UART1_TX_DMA DMA1_Channel?
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//#define UART1_RX_DMA DMA1_Channel?
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static void RCC_Configuration(void)
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{
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#ifdef RT_USING_UART1
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/* Enable USART1 and GPIOA clocks */
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
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#endif
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#ifdef RT_USING_UART6
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/* Enable USART6 and GPIOC clocks */
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE);
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#endif
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}
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static void GPIO_Configuration(void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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#ifdef RT_USING_UART1
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GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF;
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GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
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GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
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GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
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GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9|GPIO_Pin_10;
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GPIO_Init(GPIOA,&GPIO_InitStruct);
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
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#endif
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#ifdef RT_USING_UART6
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GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF;
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GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
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GPIO_InitStruct.GPIO_OType=GPIO_OType_PP;
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GPIO_InitStruct.GPIO_PuPd=GPIO_PuPd_UP;
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GPIO_InitStruct.GPIO_Pin=UART6_GPIO_TX|UART6_GPIO_RX;
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GPIO_Init(UART6_GPIO,&GPIO_InitStruct);
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GPIO_PinAFConfig(UART6_GPIO, GPIO_PinSource6, GPIO_AF_USART6);
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GPIO_PinAFConfig(UART6_GPIO, GPIO_PinSource7, GPIO_AF_USART6);
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#endif
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}
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static void NVIC_Configuration(void)
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{
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NVIC_InitTypeDef NVIC_InitStructure;
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#ifdef RT_USING_UART1
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/* Enable the USART1 Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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#endif
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#ifdef RT_USING_UART6
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/* Enable the USART1 Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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#endif
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}
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/*
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* Init all related hardware in here
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* rt_hw_serial_init() will register all supported USART device
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*/
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void rt_hw_usart_init()
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{
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USART_InitTypeDef USART_InitStructure;
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RCC_Configuration();
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GPIO_Configuration();
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NVIC_Configuration();
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/* uart init */
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#ifdef RT_USING_UART1
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USART_DeInit(USART1);
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No ;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART1, &USART_InitStructure);
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/* register uart1 */
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rt_hw_serial_register(&uart1_device, "uart1",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
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&uart1);
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/* enable interrupt */
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USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
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/* Enable USART1 */
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USART_Cmd(USART1, ENABLE);
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USART_ClearFlag(USART1,USART_FLAG_TXE);
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#endif
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/* uart init */
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#ifdef RT_USING_UART6
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USART_DeInit(USART6);
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No ;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART6, &USART_InitStructure);
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/* register uart1 */
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rt_hw_serial_register(&uart6_device, "uart6",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
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&uart6);
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/* enable interrupt */
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USART_ITConfig(USART6, USART_IT_RXNE, ENABLE);
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/* Enable USART6 */
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USART_Cmd(USART6, ENABLE);
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USART_ClearFlag(USART6,USART_FLAG_TXE);
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#endif
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}
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#ifdef RT_USING_UART1
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void USART1_IRQHandler()
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_hw_serial_isr(&uart1_device);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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#ifdef RT_USING_UART6
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void USART6_IRQHandler()
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_hw_serial_isr(&uart6_device);
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/* leave interrupt */
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rt_interrupt_leave();
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}
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#endif
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