/* * 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 * 2012-02-08 aozima update for F4. */ #include "stm32f4xx.h" #include "usart.h" #include "board.h" #include /* * 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 #ifdef RT_USING_UART6 struct stm32_serial_int_rx uart6_int_rx; struct stm32_serial_device uart6 = { USART6, &uart6_int_rx, RT_NULL }; struct rt_device uart6_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_TX_PIN_SOURCE GPIO_PinSource9 #define UART1_GPIO_RX GPIO_Pin_10 #define UART1_RX_PIN_SOURCE GPIO_PinSource10 #define UART1_GPIO GPIOA #define UART1_GPIO_RCC RCC_AHB1Periph_GPIOA #define RCC_APBPeriph_UART1 RCC_APB2Periph_USART1 #define UART1_TX_DMA DMA1_Channel4 #define UART1_RX_DMA DMA1_Channel5 #define UART2_GPIO_TX GPIO_Pin_2 #define UART2_TX_PIN_SOURCE GPIO_PinSource2 #define UART2_GPIO_RX GPIO_Pin_3 #define UART2_RX_PIN_SOURCE GPIO_PinSource3 #define UART2_GPIO GPIOA #define UART2_GPIO_RCC RCC_AHB1Periph_GPIOA #define RCC_APBPeriph_UART2 RCC_APB1Periph_USART2 /* USART3_REMAP[1:0] = 00 */ #define UART3_GPIO_TX GPIO_Pin_10 #define UART3_TX_PIN_SOURCE GPIO_PinSource10 #define UART3_GPIO_RX GPIO_Pin_11 #define UART3_RX_PIN_SOURCE GPIO_PinSource11 #define UART3_GPIO GPIOB #define UART3_GPIO_RCC RCC_AHB1Periph_GPIOB #define RCC_APBPeriph_UART3 RCC_APB1Periph_USART3 #define UART3_TX_DMA DMA1_Stream1 #define UART3_RX_DMA DMA1_Stream3 #define UART6_GPIO_TX GPIO_Pin_6 #define UART6_TX_PIN_SOURCE GPIO_PinSource6 #define UART6_GPIO_RX GPIO_Pin_7 #define UART6_RX_PIN_SOURCE GPIO_PinSource7 #define UART6_GPIO GPIOC #define UART6_GPIO_RCC RCC_AHB1Periph_GPIOC #define RCC_APBPeriph_UART6 RCC_APB2Periph_USART6 static void RCC_Configuration(void) { #ifdef RT_USING_UART1 /* Enable USART2 GPIO clocks */ RCC_AHB1PeriphClockCmd(UART1_GPIO_RCC, ENABLE); /* Enable USART2 clock */ RCC_APB2PeriphClockCmd(RCC_APBPeriph_UART1, ENABLE); #endif #ifdef RT_USING_UART2 /* Enable USART2 GPIO clocks */ RCC_AHB1PeriphClockCmd(UART2_GPIO_RCC, ENABLE); /* Enable USART2 clock */ RCC_APB1PeriphClockCmd(RCC_APBPeriph_UART2, ENABLE); #endif #ifdef RT_USING_UART3 /* Enable USART3 GPIO clocks */ RCC_AHB1PeriphClockCmd(UART3_GPIO_RCC, ENABLE); /* Enable USART3 clock */ RCC_APB1PeriphClockCmd(RCC_APBPeriph_UART3, ENABLE); /* DMA clock enable */ RCC_APB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); #endif #ifdef RT_USING_UART6 /* Enable USART6 GPIO clocks */ RCC_AHB1PeriphClockCmd(UART6_GPIO_RCC, ENABLE); /* Enable USART6 clock */ RCC_APB2PeriphClockCmd(RCC_APBPeriph_UART6, ENABLE); #endif } static void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; #ifdef RT_USING_UART1 /* Configure USART1 Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = UART1_GPIO_RX | UART1_GPIO_TX; GPIO_Init(UART1_GPIO, &GPIO_InitStructure); /* Connect alternate function */ GPIO_PinAFConfig(UART1_GPIO, UART1_TX_PIN_SOURCE, GPIO_AF_USART1); GPIO_PinAFConfig(UART1_GPIO, UART1_RX_PIN_SOURCE, GPIO_AF_USART1); #endif #ifdef RT_USING_UART2 /* Configure USART2 Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = UART2_GPIO_TX | UART2_GPIO_RX; GPIO_Init(UART2_GPIO, &GPIO_InitStructure); /* Connect alternate function */ GPIO_PinAFConfig(UART2_GPIO, UART2_TX_PIN_SOURCE, GPIO_AF_USART2); GPIO_PinAFConfig(UART2_GPIO, UART2_RX_PIN_SOURCE, GPIO_AF_USART2); #endif #ifdef RT_USING_UART3 /* Configure USART3 Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = UART3_GPIO_RX | UART3_GPIO_RX; GPIO_Init(UART3_GPIO, &GPIO_InitStructure); /* Connect alternate function */ GPIO_PinAFConfig(UART3_GPIO, UART3_TX_PIN_SOURCE, GPIO_AF_USART3); GPIO_PinAFConfig(UART3_GPIO, UART3_RX_PIN_SOURCE, GPIO_AF_USART3); #endif #ifdef RT_USING_UART6 /* Configure USART6 Rx/tx PIN */ GPIO_InitStructure.GPIO_Pin = UART6_GPIO_TX | UART6_GPIO_RX; GPIO_Init(UART6_GPIO, &GPIO_InitStructure); /* Connect alternate function */ GPIO_PinAFConfig(UART6_GPIO, UART6_TX_PIN_SOURCE, GPIO_AF_USART6); GPIO_PinAFConfig(UART6_GPIO, UART6_RX_PIN_SOURCE, GPIO_AF_USART6); #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_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); #endif #ifdef RT_USING_UART2 /* Enable the USART2 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); #endif #ifdef RT_USING_UART3 /* Enable the USART3 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* Enable the DMA1 Channel2 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream1_IRQn; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); #endif #ifdef RT_USING_UART6 /* Enable the USART6 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); #endif } static void DMA_Configuration(void) { #if defined (RT_USING_UART3) DMA_InitTypeDef DMA_InitStructure; // /* Configure DMA Stream */ // DMA_InitStructure.DMA_Channel = DMA_CHANNEL; // DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SRC_Const_Buffer; // DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)DST_Buffer; // DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToMemory; // DMA_InitStructure.DMA_BufferSize = (uint32_t)BUFFER_SIZE; // DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable; // DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; // DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; // DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // DMA_InitStructure.DMA_Priority = DMA_Priority_High; // DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; // DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full; // DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; // DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; // DMA_Init(DMA_STREAM, &DMA_InitStructure); /* Configure DMA Stream */ DMA_InitStructure.DMA_Channel = DMA_Channel_0; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART3->DR); DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)0; DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; DMA_InitStructure.DMA_BufferSize = (uint32_t)0; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_DeInit(UART3_TX_DMA); DMA_Init(UART3_TX_DMA, &DMA_InitStructure); // /* fill init structure */ // DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; // DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; // DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; // DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; // // /* 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 } volatile USART_TypeDef * uart2_debug = USART2; /* * 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(); DMA_Configuration(); /* uart init */ #ifdef RT_USING_UART1 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, &uart1); /* enable interrupt */ USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); #endif #ifdef RT_USING_UART2 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(USART2, &USART_InitStructure); /* register uart2 */ rt_hw_serial_register(&uart2_device, "uart2", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, &uart2); /* Enable USART2 DMA Rx request */ USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); #endif #ifdef RT_USING_UART3 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(USART3, &USART_InitStructure); // uart3_dma_tx.dma_channel= UART3_TX_DMA; /* register uart3 */ rt_hw_serial_register(&uart3_device, "uart3", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_TX, &uart3); /* Enable USART3 DMA Tx request */ USART_DMACmd(USART3, USART_DMAReq_Tx , ENABLE); /* enable interrupt */ USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); #endif #ifdef RT_USING_UART6 USART_InitStructure.USART_BaudRate = 9600; 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(USART6, &USART_InitStructure); /* register uart6 */ rt_hw_serial_register(&uart6_device, "uart6", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, &uart6); #endif }