265 lines
7.8 KiB
C
265 lines
7.8 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 2018-xx-xx
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* @brief DMA——存储器到存储器模式
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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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#include "./mpu/bsp_mpu.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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DMA_HandleTypeDef DMA_Handle;
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#define DMA_STREAM DMA2_Stream0
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#define DMA_STREAM_CLOCK() __DMA2_CLK_ENABLE()
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#define BUFFER_SIZE 32
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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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const uint32_t aSRC_Const_Buffer[BUFFER_SIZE]={
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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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/* 定义DMA传输目标存储器 */
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__attribute__((at(0x30000000))) uint32_t aDST_Buffer[BUFFER_SIZE];
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static void DMA_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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/**
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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480MHz */
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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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DMA_Config();
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/* 等待DMA传输完成 */
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while(__HAL_DMA_GET_FLAG(&DMA_Handle,DMA_FLAG_TCIF0_4)==DISABLE)
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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(aSRC_Const_Buffer, aDST_Buffer, 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 DMA_Config(void)
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{
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HAL_StatusTypeDef DMA_status = HAL_ERROR;
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/* 使能DMA时钟 */
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DMA_STREAM_CLOCK();
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DMA_Handle.Instance = DMA_STREAM;
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/* DMA数据流通道选择 */
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DMA_Handle.Init.Request = DMA_REQUEST_MEM2MEM;
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/* 存储器到存储器模式 */
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DMA_Handle.Init.Direction = DMA_MEMORY_TO_MEMORY;
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/* 使能自动递增功能 */
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DMA_Handle.Init.PeriphInc = DMA_PINC_ENABLE;
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/* 使能自动递增功能 */
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DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;
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/* 源数据是字大小(32位) */
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DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
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/* 目标数据也是字大小(32位) */
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DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
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/* 一次传输模式，存储器到存储器模式不能使用循环传输 */
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DMA_Handle.Init.Mode = DMA_NORMAL;
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/* DMA数据流优先级为高 */
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DMA_Handle.Init.Priority = DMA_PRIORITY_HIGH;
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/* 禁用FIFO模式 */
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DMA_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
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DMA_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
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/* 单次模式 */
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DMA_Handle.Init.MemBurst = DMA_MBURST_SINGLE;
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/* 单次模式 */
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DMA_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
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/* 完成DMA数据流参数配置 */
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HAL_DMA_Init(&DMA_Handle);
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DMA_status = HAL_DMA_Start(&DMA_Handle,(uint32_t)aSRC_Const_Buffer,(uint32_t)aDST_Buffer,BUFFER_SIZE);
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/* 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 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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