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STM32【HAL库】使用外部SRAM程序

来源：博客园


(资料图)

#include #ifdef BSP_USING_SRAM#include #include #include #define DBG_TAG "drv_exsram"#define DBG_LVL DBG_LOG#include #define RAM_HEAP_EX_START           (0x68000000)#define RAM_HEAP_EX_SIZE            (1024 * 1024)#define RAM_HEAP_EX_END             (RAM_HEAP_EX_START + RAM_HEAP_EX_SIZE)/* 注意：SRAM 句柄不能为局部变量 */SRAM_HandleTypeDef SRAM_Handler;    // SRAM句柄#ifdef RT_USING_MEMHEAP_AS_HEAPstatic struct rt_memheap system_heap;#endif/**  * @brief SRAM 初始化  * @retval None  */static int system_sram_init(void){int result = RT_EOK;    FSMC_NORSRAM_TimingTypeDef FSMC_ReadWriteTim;    /*----------------------------------------- 使能时钟 -----------------------------------------*/    __HAL_RCC_GPIOD_CLK_ENABLE();           // 使能GPIOD时钟    __HAL_RCC_GPIOE_CLK_ENABLE();           // 使能GPIOE时钟    __HAL_RCC_GPIOF_CLK_ENABLE();           // 使能GPIOF时钟    __HAL_RCC_GPIOG_CLK_ENABLE();           // 使能GPIOG时钟    /*----------------------------------------- 配置 SRAM -----------------------------------------*/    SRAM_Handler.Instance = FSMC_NORSRAM_DEVICE;    SRAM_Handler.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;    SRAM_Handler.Init.NSBank = FSMC_NORSRAM_BANK3;                          // 使用NE3    SRAM_Handler.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_DISABLE;       // 地址/数据线不复用    SRAM_Handler.Init.MemoryType = FSMC_MEMORY_TYPE_SRAM;                   // SRAM    SRAM_Handler.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;      // 16位数据宽度    SRAM_Handler.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;     // 是否使能突发访问,仅对同步突发存储器有效,此处未用到    SRAM_Handler.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;   // 等待信号的极性,仅在突发模式访问下有用    SRAM_Handler.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;        // 存储器是在等待周期之前的一个时钟周期还是等待周期期间使能NWAIT    SRAM_Handler.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;         // 存储器写使能    SRAM_Handler.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;                // 等待使能位,此处未用到    SRAM_Handler.Init.ExtendedMode = FSMC_EXTENDED_MODE_DISABLE;            // 读写使用相同的时序    SRAM_Handler.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_DISABLE;    // 是否使能同步传输模式下的等待信号,此处未用到    SRAM_Handler.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;                // 禁止突发写    /*----------------------------------------- FSMC 读写时序控制 -----------------------------------------*/    FSMC_ReadWriteTim.AddressSetupTime = 0x00;          // 地址建立时间（ADDSET）为1个HCLK 1/72M = 13.8ns    FSMC_ReadWriteTim.AddressHoldTime = 0x00;           // 地址保持时间（ADDHLD）模式A未用到    FSMC_ReadWriteTim.DataSetupTime = 0x03;             // 数据保存时间为3个HCLK = 4*13.8 = 55ns    FSMC_ReadWriteTim.BusTurnAroundDuration = 0X00;    FSMC_ReadWriteTim.CLKDivision = 0X00;    FSMC_ReadWriteTim.DataLatency = 0X00;    FSMC_ReadWriteTim.AccessMode = FSMC_ACCESS_MODE_A;  // 模式A    if (HAL_SRAM_Init(&SRAM_Handler, &FSMC_ReadWriteTim, &FSMC_ReadWriteTim) != HAL_OK){LOG_E("SDRAM init failed!");        result = -RT_ERROR;}else    {#ifdef RT_USING_MEMHEAP_AS_HEAP        /* If RT_USING_MEMHEAP_AS_HEAP is enabled, SDRAM is initialized to the heap */rt_memheap_init(&system_heap, "sdram", (void *)RAM_HEAP_EX_START, RAM_HEAP_EX_SIZE);#else        rt_system_heap_init((void *)RAM_HEAP_EX_START, (void *)RAM_HEAP_EX_END);#endif    }return result;}INIT_BOARD_EXPORT(system_sram_init);#endif /* BSP_USING_SRAM */

调用时 HAL_SRAM_Init 需要使用 stm32f1xx_hal_sram.c 文件和 stm32f1xx_ll_fsmc.c 文件，并且需要在 stm32f1xx_hal_msp.c 文件中完成相应的引脚使能，代码如下所示：

static uint32_t FSMC_Initialized = 0;static void HAL_FSMC_MspInit(void){  /* USER CODE BEGIN FSMC_MspInit 0 */  /* USER CODE END FSMC_MspInit 0 */  GPIO_InitTypeDef GPIO_InitStruct ={0};  if (FSMC_Initialized) {    return;  }  FSMC_Initialized = 1;  /* Peripheral clock enable */  __HAL_RCC_FSMC_CLK_ENABLE();  /** FSMC GPIO Configuration  PF0   ------> FSMC_A0  PF1   ------> FSMC_A1  PF2   ------> FSMC_A2  PF3   ------> FSMC_A3  PF4   ------> FSMC_A4  PF5   ------> FSMC_A5  PF12   ------> FSMC_A6  PF13   ------> FSMC_A7  PF14   ------> FSMC_A8  PF15   ------> FSMC_A9  PG0   ------> FSMC_A10  PG1   ------> FSMC_A11  PE7   ------> FSMC_D4  PE8   ------> FSMC_D5  PE9   ------> FSMC_D6  PE10   ------> FSMC_D7  PE11   ------> FSMC_D8  PE12   ------> FSMC_D9  PE13   ------> FSMC_D10  PE14   ------> FSMC_D11  PE15   ------> FSMC_D12  PD8   ------> FSMC_D13  PD9   ------> FSMC_D14  PD10   ------> FSMC_D15  PD11   ------> FSMC_A16  PD12   ------> FSMC_A17  PD13   ------> FSMC_A18  PD14   ------> FSMC_D0  PD15   ------> FSMC_D1  PG2   ------> FSMC_A12  PG3   ------> FSMC_A13  PG4   ------> FSMC_A14  PG5   ------> FSMC_A15  PD0   ------> FSMC_D2  PD1   ------> FSMC_D3  PD4   ------> FSMC_NOE  PD5   ------> FSMC_NWE  PG10   ------> FSMC_NE3  PE0   ------> FSMC_NBL0  PE1   ------> FSMC_NBL1  */  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_12|GPIO_PIN_13                          |GPIO_PIN_14|GPIO_PIN_15;  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_10;  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);  GPIO_InitStruct.Pin = GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10                          |GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14                          |GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1;  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);  GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11                          |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15                          |GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5;  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);  /* USER CODE BEGIN FSMC_MspInit 1 */  /* USER CODE END FSMC_MspInit 1 */}void HAL_SRAM_MspInit(SRAM_HandleTypeDef* hsram){  /* USER CODE BEGIN SRAM_MspInit 0 */  /* USER CODE END SRAM_MspInit 0 */  HAL_FSMC_MspInit();  /* USER CODE BEGIN SRAM_MspInit 1 */  /* USER CODE END SRAM_MspInit 1 */}static uint32_t FSMC_DeInitialized = 0;static void HAL_FSMC_MspDeInit(void){  /* USER CODE BEGIN FSMC_MspDeInit 0 */  /* USER CODE END FSMC_MspDeInit 0 */  if (FSMC_DeInitialized) {    return;  }  FSMC_DeInitialized = 1;  /* Peripheral clock enable */  __HAL_RCC_FSMC_CLK_DISABLE();  /** FSMC GPIO Configuration  PF0   ------> FSMC_A0  PF1   ------> FSMC_A1  PF2   ------> FSMC_A2  PF3   ------> FSMC_A3  PF4   ------> FSMC_A4  PF5   ------> FSMC_A5  PF12   ------> FSMC_A6  PF13   ------> FSMC_A7  PF14   ------> FSMC_A8  PF15   ------> FSMC_A9  PG0   ------> FSMC_A10  PG1   ------> FSMC_A11  PE7   ------> FSMC_D4  PE8   ------> FSMC_D5  PE9   ------> FSMC_D6  PE10   ------> FSMC_D7  PE11   ------> FSMC_D8  PE12   ------> FSMC_D9  PE13   ------> FSMC_D10  PE14   ------> FSMC_D11  PE15   ------> FSMC_D12  PD8   ------> FSMC_D13  PD9   ------> FSMC_D14  PD10   ------> FSMC_D15  PD11   ------> FSMC_A16  PD12   ------> FSMC_A17  PD13   ------> FSMC_A18  PD14   ------> FSMC_D0  PD15   ------> FSMC_D1  PG2   ------> FSMC_A12  PG3   ------> FSMC_A13  PG4   ------> FSMC_A14  PG5   ------> FSMC_A15  PD0   ------> FSMC_D2  PD1   ------> FSMC_D3  PD4   ------> FSMC_NOE  PD5   ------> FSMC_NWE  PG10   ------> FSMC_NE3  PE0   ------> FSMC_NBL0  PE1   ------> FSMC_NBL1  */  HAL_GPIO_DeInit(GPIOF, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_12|GPIO_PIN_13                          |GPIO_PIN_14|GPIO_PIN_15);  HAL_GPIO_DeInit(GPIOG, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_10);  HAL_GPIO_DeInit(GPIOE, GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10                          |GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14                          |GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1);  HAL_GPIO_DeInit(GPIOD, GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11                          |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15                          |GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5);  /* USER CODE BEGIN FSMC_MspDeInit 1 */  /* USER CODE END FSMC_MspDeInit 1 */}void HAL_SRAM_MspDeInit(SRAM_HandleTypeDef* hsram){  /* USER CODE BEGIN SRAM_MspDeInit 0 */  /* USER CODE END SRAM_MspDeInit 0 */  HAL_FSMC_MspDeInit();  /* USER CODE BEGIN SRAM_MspDeInit 1 */  /* USER CODE END SRAM_MspDeInit 1 */}

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