[问答]

stm32f103ze nano3.15使用串口DMA接收配置时报错的原因？

问答对人有帮助，内容完整，我也想知道答案 0 使用stm32f103ze，移植完成nano的3.1.5版本。在增加uart2的dma接收配置时，出现问题，代码图下 #include "drive_uart.h" #define LEN_UART2_RECV_BUFF 100 UART_HandleTypeDef UART2_Handler; //UART2句柄 DMA_HandleTypeDef UART2RxDMA_Handler; unsigned char g_uart2_buff[LEN_UART2_RECV_BUFF]={0}; unsigned char hdma_usart2_rx=0; void uart2_init_console(u32 bound) { //UART 初始化设置 UART2_Handler.Instance=USART2; //USART2 UART2_Handler.Init.BaudRate=bound; //波特率 UART2_Handler.Init.WordLength=UART_WORDLENGTH_8B; //字长为8位数据格式 UART2_Handler.Init.StopBits=UART_STOPBITS_1; //一个停止位 UART2_Handler.Init.Parity=UART_PARITY_NONE; //无奇偶校验位 UART2_Handler.Init.HwFlowCtl=UART_HWCONTROL_NONE; //无硬件流控 UART2_Handler.Init.Mode=UART_MODE_TX_RX; HAL_UART_Init(&UART2_Handler); } void dma_usart2_rx_config() { __HAL_RCC_DMA1_CLK_ENABLE(); UART2RxDMA_Handler.Instance = DMA1_Channel6; UART2RxDMA_Handler.Init.Direction = DMA_PERIPH_TO_MEMORY; //外设到内存 UART2RxDMA_Handler.Init.PeriphInc = DMA_PINC_DISABLE; UART2RxDMA_Handler.Init.MemInc = DMA_MINC_ENABLE; UART2RxDMA_Handler.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; UART2RxDMA_Handler.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; UART2RxDMA_Handler.Init.Mode = DMA_CIRCULAR; UART2RxDMA_Handler.Init.Priority=DMA_PRIORITY_MEDIUM; HAL_DMA_DeInit(&UART2RxDMA_Handler); HAL_DMA_Init(&UART2RxDMA_Handler); __HAL_LINKDMA(&UART2_Handler, hdmatx, UART2RxDMA_Handler); HAL_UART_Receive_DMA(&UART2_Handler, g_uart2_buff, LEN_UART2_RECV_BUFF); } unsigned char buffer_data_num_index() { return (LEN_UART2_RECV_BUFF - __HAL_DMA_GET_COUNTER(&UART2RxDMA_Handler)); } void dma_usart2_init() { uart2_init_console(115200); dma_usart2_rx_config(); } 其中 dma_usart2_init 在 main 函数中调用。当在 dma_usart2_rx_config 函数中增加 HAL_UART_Receive_DMA 时，程序启动时会报错，信息如下 \ \| / RT - Thread Operating System / \| \ 3.1.5 build Aug 13 2023 2006 - 2020 Copyright by rt-thread team psr: 0x01000000 r00: 0x08001f5f r01: 0x00000000 r02: 0x00000064 r03: 0x00001000 r04: 0x20000208 r05: 0x00000064 r06: 0xdeadbeef r07: 0xdeadb \ \| / RT - Thread Operating System / \| \ 3.1.5 build Aug 13 2023 2006 - 2020 Copyright by rt-thread team psr: 0x01000000 r00: 0x08001f5f r01: 0x00000000 r02: 0x00000064 r03: 0x00001000 r04: 0x20000208 r05: 0x00000064 r06: 0xdeadbeef r07: 0xdeadbeef r08: 0xdeadbeef r09: 0xdeadbeef r10: 0xdeadbeef r11: 0xdeadbeef r12: 0x00000008 lr: 0x0800279f pc: 0x08001942 hard fault on thread: main thread pri status sp stack size max used left tick error tshell 21 ready 0x00000040 0x00000400 06% 0x0000000a 000 tidle 31 ready 0x00000044 0x00000100 26% 0x00000020 000 main 10 ready 0x00000044 0x00000400 23% 0x00000013 000 bus fault: SCB_CFSR_BFSR:0x04 IMPRECISERR 0
2023-8-20 16:56:29　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × ss 该类别下有 100 个回答。邀请回答 chunhuahua 该类别下有 55 个回答。邀请回答而无返还该类别下有 47 个回答。邀请回答最强海贼王该类别下有 45 个回答。邀请回答王尚岱该类别下有 45 个回答。邀请回答河神大人该类别下有 43 个回答。邀请回答 nhcp 该类别下有 40 个回答。邀请回答万航渡路该类别下有 40 个回答。邀请回答 wonick 该类别下有 39 个回答。邀请回答青sky 该类别下有 38 个回答。邀请回答 mintsy 该类别下有 38 个回答。邀请回答熊本熊该类别下有 37 个回答。邀请回答 h1654155272.9717 该类别下有 36 个回答。邀请回答其实znvm 该类别下有 36 个回答。邀请回答 zhongnian 该类别下有 36 个回答。邀请回答糖栗子该类别下有 35 个回答。邀请回答小野七七该类别下有 35 个回答。邀请回答 juju宇哥该类别下有 34 个回答。邀请回答向日葵的花季该类别下有 33 个回答。邀请回答剑寒九州该类别下有 33 个回答。邀请回答举报糖栗子相关推荐 • STM32F103ZE该如何去使用串口TX-DMA功能呢 1168 • STM32F103ZE与51单片机串口通信 3973 • STM32F103ZE最小系统板的主函数的流程是怎样的 1306 • STM32F103ZE单片机用ST-LINK下载程序失败的原因是什么？ 874 • 基于stm32F103ZE单片机的USART串口怎么使用？ 745 • 请问可以通过STM32F103ZE的USB操作SD卡吗？ 1174 • 请问一下STM32F103ZE最小系统有何作用 1031 • 请问stm32f103ze和stm32f103rb(vb)两个移植模板什么区别？ 4275 • 谁能用stm32f103ze帮我做个双字节音乐演奏的程序，感激不尽... 2276 • 怎样将uTenux移植到STM32F103ZE开发板上去呢 1450 1个回答

答案对人有帮助，有参考价值 0 .UART_HardwareFlowControl = UART_HWCONTROL_NONE, //无硬件数据流控制 .UART_Mode = UART_MODE_TX_RX, //收发模式 .UART_Parity = UART_PARITY_NONE, //无校验位 .UART_StopBits = UART_STOPBITS_1, //一停止位 .UART_WordLength = UART_WORDLENGTH_8B, //数据位为8位 .UART_BaudRate = bound //波特率 }; if(HAL_UART_Init(&UART2_Handler) != HAL_OK){ error_handler(); //初始化失败，死循环 } //使能 UART 接收 DMA 方式 __HAL_RCC_DMA1_CLK_ENABLE(); //使能 DMA1 时钟 HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 3, 3); //DMA 通道6中断通道设置 HAL_NVIC_EnableIRQ(DMA1_Channel6_IRQn); //DMA 通道6中断使能 UART2RxDMA_Handler.Instance = DMA1_Channel6; //DMA通道选择 UART2RxDMA_Handler.Init.Direction = DMA_PERIPH_TO_MEMORY; //外设到内存 UART2RxDMA_Handler.Init.PeriphInc = DMA_PINC_DISABLE; //外设不增量 UART2RxDMA_Handler.Init.MemInc = DMA_MINC_ENABLE; //内存增量 UART2RxDMA_Handler.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; //外设数据宽度为8位 UART2RxDMA_Handler.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; //内存数据宽度为8位 UART2RxDMA_Handler.Init.Mode = DMA_NORMAL; //普通模式 UART2RxDMA_Handler.Init.Priority = DMA_PRIORITY_LOW; //优先级为低 HAL_DMA_Init(&UART2RxDMA_Handler); //初始化 DMA 外设 __HAL_LINKDMA(&UART2_Handler,hdmarx,UART2RxDMA_Handler); //连接 UART2 的 DMA HAL_UART_Receive_DMA(&UART2_Handler,g_uart2_buff,LEN_UART2_RECV_BUFF); //启动 DMA 传输 } 这里需要注意的是，如果使用 DMA 收发，需要在 stm32f1xx_it.c 中添加 DMA 传输完成中断的处理函数 DMA1_Channel6_IRQHandler()。初始写法是没有优先级等级的，可以无脑设置成最高的，但之后代码升级优化就会出现问题。这里直接复制下在 H7 和 F4 上正常的写法： #define DMA_UART_RX_STREAM DMA2_Stream2 #define DMA_UART_RX_CHANNEL DMA_CHANNEL_4 #define DMA_UART_RX_IRQn DMA2_Stream2_IRQn #define DMA_UART_RX_IRQ_HANDLER DMA2_Stream2_IRQHandler #define DMA_UART_TX_STREAM DMA2_Stream7 #define DMA_UART_TX_CHANNEL DMA_CHANNEL_4 #define DMA_UART_TX_IRQn DMA2_Stream7_IRQn #define DMA_UART_TX_IRQ_HANDLER DMA2_Stream7_IRQHandler DMA_HandleTypeDef hdma_uart_rx; DMA_HandleTypeDef hdma_uart_tx; void MX_DMA_Init(void) { /* DMA controller clock enable / __HAL_RCC_DMA2_CLK_ENABLE(); / DMA interrupt init / / DMA2_Stream2_IRQn interrupt configuration / HAL_NVIC_SetPriority(DMA_UART_RX_IRQn, 3, 0); HAL_NVIC_EnableIRQ(DMA_UART_RX_IRQn); / DMA2_Stream7_IRQn interrupt configuration / HAL_NVIC_SetPriority(DMA_UART_TX_IRQn, 3, 0); HAL_NVIC_EnableIRQ(DMA_UART_TX_IRQn); } void MX_USART2_UART_Init(uint32_t baud_rate) { / USART2 parameter configuration / huart2.Instance = USART2; huart2.Init.BaudRate = baud_rate; huart2.Init.WordLength = UART_WORDLENGTH_8B; huart2.Init.StopBits = UART_STOPBITS_1; huart2.Init.Parity = UART_PARITY_NONE; huart2.Init.Mode = UART_MODE_TX_RX; huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart2.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart2) != HAL_OK) { Error_Handler(); } / Configure DMA channels */ hdma_uart_rx.Instance = DMA_UART_RX_STREAM; hdma_uart_rx.Init.Channel = DMA_UART_RX_CHANNEL; hdma_uart_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_uart_rx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_uart_rx.Init.MemInc = DMA_MINC_ENABLE; hdma_uart_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_uart_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_uart_rx.Init.Mode = DMA_CIRCULAR; hdma_uart_rx.Init.Priority = DMA_PRIORITY_LOW; if (HAL_DMA_Init(&hdma_uart_rx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(&huart2, hdmarx, hdma_uart_rx); hdma_uart_tx.Instance = DMA_UART_TX_STREAM; hdma_uart_tx.Init.Channel = DMA_UART_TX_CHANNEL; hdma_uart_tx.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_uart_tx.Init.PeriphInc = DMA_PINC_DISABLE; hdma_uart_tx.Init.MemInc = DMA_MINC_ENABLE; hdma_uart_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE; hdma_uart_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE; hdma_uart_tx.Init.Mode = DMA_NORMAL; hdma_uart_tx.Init.Priority = DMA_PRIORITY_LOW; if (HAL_DMA_Init(&hdma_uart_tx) != HAL_OK) { Error_Handler(); } __HAL_LINKDMA(&huart2, hdmatx, hdma_uart_tx); } 以上就是 stm32f103ze nano3.1.5 版本串口 DMA 接收配置的详细配置方法和解决报错问题的相关材料。如果在移植的过程中仍有疑问或其他问题，可以参考以上内容进行解决。

2023-10-11 11:27:34 评论举报敷衍作笑谈