297 lines
8.5 KiB
C
297 lines
8.5 KiB
C
/**
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******************************************************************
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* @file main.c
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* @author fire
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* @version V1.0
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* @date 2019-xx-xx
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* @brief DMA实验
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******************************************************************
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* @attention
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*
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* 实验平台:野火 STM32H750 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************
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*/
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#include "stm32h7xx.h"
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#include "main.h"
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#include "./led/bsp_led.h"
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#include "./delay/core_delay.h"
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/* 相关宏定义，使用存储器到存储器传输必须使用DMA2 */
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MDMA_HandleTypeDef MDMA_Handle;
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#define MDMA_INSTANCE MDMA_Channel0
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#define DMA_STREAM_CLOCK() __HAL_RCC_MDMA_CLK_ENABLE();
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#define BUFFER_SIZE 32
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__IO uint32_t TransferCompleted = 0;
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/* 定义aSRC_Const_Buffer数组作为DMA传输数据源
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const关键字将aSRC_Const_Buffer数组变量定义为常量类型 */
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static const uint32_t SRC_Const_Buffer[BUFFER_SIZE] =
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{
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0x01020304, 0x05060708, 0x090A0B0C, 0x0D0E0F10,
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0x11121314, 0x15161718, 0x191A1B1C, 0x1D1E1F20,
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0x21222324, 0x25262728, 0x292A2B2C, 0x2D2E2F30,
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0x31323334, 0x35363738, 0x393A3B3C, 0x3D3E3F40,
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0x41424344, 0x45464748, 0x494A4B4C, 0x4D4E4F50,
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0x51525354, 0x55565758, 0x595A5B5C, 0x5D5E5F60,
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0x61626364, 0x65666768, 0x696A6B6C, 0x6D6E6F70,
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0x71727374, 0x75767778, 0x797A7B7C, 0x7D7E7F80
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};
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/* 定义DMA传输目标存储器AXISRAM */
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__attribute__((at(0x24004000))) uint32_t DESTBuffer[BUFFER_SIZE];
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static void MDMA_Config(void);
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static void Delay(__IO uint32_t nCount);
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static void SystemClock_Config(void);
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uint8_t Buffercmp(const uint32_t* pBuffer, uint32_t* pBuffer1, uint16_t BufferLength);
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static void MDMA_TransferCompleteCallback(MDMA_HandleTypeDef *hmdma);
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/**
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* @brief 主函数
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* @param 无
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* @retval 无
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*/
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int main(void)
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{
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/* 定义存放比较结果变量 */
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uint8_t TransferStatus;
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/* 系统时钟初始化成480 MHz */
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SystemClock_Config();
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/* 默认不配置 MPU，若需要更高性能，当配置 MPU 后，使用
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DMA 时需注意 Cache 与 内存内容一致性的问题，
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具体注意事项请参考配套教程的 MPU 配置相关章节 */
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// Board_MPU_Config(0, MPU_Normal_WT, 0xD0000000, MPU_32MB);
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// Board_MPU_Config(1, MPU_Normal_WT, 0x24000000, MPU_512KB);
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SCB_EnableICache(); // 使能指令 Cache
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// SCB_EnableDCache(); // 使能数据 Cache
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/* LED 端口初始化 */
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LED_GPIO_Config();
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/* 设置RGB彩色灯为紫色 */
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LED_PURPLE;
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/* 简单延时函数 */
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Delay(0xFFFFFF);
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/* DMA传输配置 */
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MDMA_Config();
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/* 等待DMA传输完成 */
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while(TransferCompleted == 0)
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{
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}
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/* 比较源数据与传输后数据 */
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TransferStatus=Buffercmp(SRC_Const_Buffer, DESTBuffer, BUFFER_SIZE);
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/* 判断源数据与传输后数据比较结果*/
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if(TransferStatus==0)
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{
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/* 源数据与传输后数据不相等时RGB彩色灯显示红色 */
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LED_RED;
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}
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else
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{
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/* 源数据与传输后数据相等时RGB彩色灯显示蓝色 */
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LED_BLUE;
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}
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while (1)
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{
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}
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}
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/* 简单的延时函数 */
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static void Delay(__IO uint32_t nCount)
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{
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for(; nCount != 0; nCount--);
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}
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/**
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* DMA传输配置
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*/
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static void MDMA_Config(void)
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{
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HAL_StatusTypeDef DMA_status = HAL_ERROR;
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/* 使能MDMA时钟 */
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DMA_STREAM_CLOCK();
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//MDMA外设寄存器基地址——通道0
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MDMA_Handle.Instance = MDMA_INSTANCE;
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//软件触发MDMA采集
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MDMA_Handle.Init.Request = MDMA_REQUEST_SW;
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MDMA_Handle.Init.TransferTriggerMode = MDMA_FULL_TRANSFER;
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//MDMA的软件优先级：低
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MDMA_Handle.Init.Priority = MDMA_PRIORITY_HIGH;
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MDMA_Handle.Init.Endianness = MDMA_LITTLE_ENDIANNESS_PRESERVE;
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//源地址地址自增，长度为字
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MDMA_Handle.Init.SourceInc = MDMA_SRC_INC_WORD;
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//目标地址地址自增，长度为字节
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MDMA_Handle.Init.DestinationInc = MDMA_DEST_INC_BYTE;
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//源地址数据宽度：字
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MDMA_Handle.Init.SourceDataSize = MDMA_SRC_DATASIZE_WORD;
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//目标地址数据宽度：字节
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MDMA_Handle.Init.DestDataSize = MDMA_DEST_DATASIZE_BYTE;
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//数据对齐格式：右对齐（小端模式）
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MDMA_Handle.Init.DataAlignment = MDMA_DATAALIGN_PACKENABLE;
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//源地址地址不自增
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MDMA_Handle.Init.SourceBurst = MDMA_SOURCE_BURST_SINGLE;
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//目标地址地址不自增
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MDMA_Handle.Init.DestBurst = MDMA_DEST_BURST_SINGLE;
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MDMA_Handle.Init.BufferTransferLength = 4;
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MDMA_Handle.Init.SourceBlockAddressOffset = 0;
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MDMA_Handle.Init.DestBlockAddressOffset = 0;
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HAL_MDMA_Init(&MDMA_Handle);
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HAL_MDMA_RegisterCallback(&MDMA_Handle, HAL_MDMA_XFER_CPLT_CB_ID, MDMA_TransferCompleteCallback);
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/* Set Interrupt Group Priority */
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HAL_NVIC_SetPriority(MDMA_IRQn, 0, 0);
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/* Enable the MDMA channel global Interrupt */
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HAL_NVIC_EnableIRQ(MDMA_IRQn);
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DMA_status = HAL_MDMA_Start_IT(&MDMA_Handle, (uint32_t)&SRC_Const_Buffer,
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(uint32_t)&DESTBuffer,
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(BUFFER_SIZE * 4),
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1); /* 判断DMA状态 */
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if (DMA_status != HAL_OK)
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{
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/* DMA出错就让程序运行下面循环：RGB彩色灯闪烁 */
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while (1)
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{
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LED_RED;
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Delay(0xFFFFFF);
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LED_RGBOFF;
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Delay(0xFFFFFF);
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}
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}
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}
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/**
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* 判断指定长度的两个数据源是否完全相等，
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* 如果完全相等返回1，只要其中一对数据不相等返回0
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*/
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uint8_t Buffercmp(const uint32_t* pBuffer,
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uint32_t* pBuffer1, uint16_t BufferLength)
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{
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/* 数据长度递减 */
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while(BufferLength--)
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{
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/* 判断两个数据源是否对应相等 */
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if(*pBuffer != *pBuffer1)
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{
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/* 对应数据源不相等马上退出函数，并返回0 */
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return 0;
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}
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/* 递增两个数据源的地址指针 */
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pBuffer++;
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pBuffer1++;
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}
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/* 完成判断并且对应数据相对 */
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return 1;
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}
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/**
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* @brief MDMA conversion complete callback
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* @note This function is executed when the transfer complete interrupt
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* is generated
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* @retval None
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*/
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static void MDMA_TransferCompleteCallback(MDMA_HandleTypeDef *hmdma)
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{
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TransferCompleted = 1;
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}
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/**
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* @brief System Clock 配置
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* system Clock 配置如下:
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 480000000 (CPU Clock)
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* HCLK(Hz) = 240000000 (AXI and AHBs Clock)
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* AHB Prescaler = 2
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* D1 APB3 Prescaler = 2 (APB3 Clock 120MHz)
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* D2 APB1 Prescaler = 2 (APB1 Clock 120MHz)
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* D2 APB2 Prescaler = 2 (APB2 Clock 120MHz)
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* D3 APB4 Prescaler = 2 (APB4 Clock 120MHz)
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 5
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* PLL_N = 192
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* PLL_P = 2
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* PLL_Q = 4
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* PLL_R = 2
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* VDD(V) = 3.3
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* Flash Latency(WS) = 4
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* @param None
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* @retval None
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*/
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** 启用电源配置更新
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*/
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HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
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/** 配置主内稳压器输出电压
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
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while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
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/** 初始化CPU、AHB和APB总线时钟
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 5;
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RCC_OscInitStruct.PLL.PLLN = 192;
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RCC_OscInitStruct.PLL.PLLP = 2;
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RCC_OscInitStruct.PLL.PLLQ = 2;
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RCC_OscInitStruct.PLL.PLLR = 2;
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RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
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RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
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RCC_OscInitStruct.PLL.PLLFRACN = 0;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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while(1);
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}
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/** 初始化CPU、AHB和APB总线时钟
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
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|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
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RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
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{
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while(1);
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}
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}
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/****************************END OF FILE***************************/
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