296 lines
9.1 KiB
C
296 lines
9.1 KiB
C
#include "sdio_sdcard.h"
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#include "string.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK STM32F429开发板
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//SD卡驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//创建日期:2016/1/16
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//版本：V1.0
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2014-2024
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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SD_HandleTypeDef SDCARD_Handler; //SD卡句柄
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HAL_SD_CardInfoTypedef SDCardInfo; //SD卡信息结构体
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DMA_HandleTypeDef SDTxDMAHandler,SDRxDMAHandler; //SD卡DMA发送和接收句柄
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//SD_ReadDisk/SD_WriteDisk函数专用buf,当这两个函数的数据缓存区地址不是4字节对齐的时候,
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//需要用到该数组,确保数据缓存区地址是4字节对齐的.
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__align(4) u8 SDIO_DATA_BUFFER[512];
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//SD卡初始化
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//返回值:0 初始化正确；其他值，初始化错误
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u8 SD_Init(void)
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{
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u8 SD_Error;
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//初始化时的时钟不能大于400KHZ
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SDCARD_Handler.Instance=SDIO;
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SDCARD_Handler.Init.ClockEdge=SDIO_CLOCK_EDGE_RISING; //上升沿
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SDCARD_Handler.Init.ClockBypass=SDIO_CLOCK_BYPASS_DISABLE; //不使用bypass模式，直接用HCLK进行分频得到SDIO_CK
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SDCARD_Handler.Init.ClockPowerSave=SDIO_CLOCK_POWER_SAVE_DISABLE; //空闲时不关闭时钟电源
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SDCARD_Handler.Init.BusWide=SDIO_BUS_WIDE_1B; //1位数据线
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SDCARD_Handler.Init.HardwareFlowControl=SDIO_HARDWARE_FLOW_CONTROL_DISABLE;//关闭硬件流控
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SDCARD_Handler.Init.ClockDiv=SDIO_TRANSFER_CLK_DIV; //SD传输时钟频率最大25MHZ
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SD_Error=HAL_SD_Init(&SDCARD_Handler,&SDCardInfo);
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if(SD_Error!=SD_OK) return 1;
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SD_Error=HAL_SD_WideBusOperation_Config(&SDCARD_Handler,SDIO_BUS_WIDE_4B);//使能宽总线模式
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if(SD_Error!=SD_OK) return 2;
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return 0;
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}
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//SDMMC底层驱动，时钟使能，引脚配置，DMA配置
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//此函数会被HAL_SD_Init()调用
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//hsd:SD卡句柄
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd)
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{
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DMA_HandleTypeDef TxDMAHandler,RxDMAHandler;
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GPIO_InitTypeDef GPIO_Initure;
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__HAL_RCC_SDIO_CLK_ENABLE(); //使能SDIO时钟
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__HAL_RCC_DMA2_CLK_ENABLE(); //使能DMA2时钟
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__HAL_RCC_GPIOC_CLK_ENABLE(); //使能GPIOC时钟
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__HAL_RCC_GPIOD_CLK_ENABLE(); //使能GPIOD时钟
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//PC8,9,10,11,12
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GPIO_Initure.Pin=GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
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GPIO_Initure.Mode=GPIO_MODE_AF_PP; //推挽复用
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GPIO_Initure.Pull=GPIO_PULLUP; //上拉
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GPIO_Initure.Speed=GPIO_SPEED_HIGH; //高速
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GPIO_Initure.Alternate=GPIO_AF12_SDIO; //复用为SDIO
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HAL_GPIO_Init(GPIOC,&GPIO_Initure); //初始化
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//PD2
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GPIO_Initure.Pin=GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD,&GPIO_Initure); //初始化
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#if (SD_DMA_MODE==1) //使用DMA模式
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HAL_NVIC_SetPriority(SDMMC1_IRQn,2,0); //配置SDMMC1中断，抢占优先级2，子优先级0
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HAL_NVIC_EnableIRQ(SDMMC1_IRQn); //使能SDMMC1中断
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//配置发送DMA
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SDRxDMAHandler.Instance=DMA2_Stream3;
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SDRxDMAHandler.Init.Channel=DMA_CHANNEL_4;
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SDRxDMAHandler.Init.Direction=DMA_PERIPH_TO_MEMORY;
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SDRxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
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SDRxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
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SDRxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
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SDRxDMAHandler.Init.MemDataAlignment=DMA_MDATAALIGN_WORD;
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SDRxDMAHandler.Init.Mode=DMA_PFCTRL;
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SDRxDMAHandler.Init.Priority=DMA_PRIORITY_VERY_HIGH;
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SDRxDMAHandler.Init.FIFOMode=DMA_FIFOMODE_ENABLE;
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SDRxDMAHandler.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_FULL;
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SDRxDMAHandler.Init.MemBurst=DMA_MBURST_INC4;
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SDRxDMAHandler.Init.PeriphBurst=DMA_PBURST_INC4;
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__HAL_LINKDMA(hsd, hdmarx, SDRxDMAHandler); //将接收DMA和SD卡的发送DMA连接起来
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HAL_DMA_DeInit(&SDRxDMAHandler);
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HAL_DMA_Init(&SDRxDMAHandler); //初始化接收DMA
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//配置接收DMA
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SDTxDMAHandler.Instance=DMA2_Stream6;
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SDTxDMAHandler.Init.Channel=DMA_CHANNEL_4;
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SDTxDMAHandler.Init.Direction=DMA_MEMORY_TO_PERIPH;
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SDTxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
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SDTxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
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SDTxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
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SDTxDMAHandler.Init.MemDataAlignment=DMA_MDATAALIGN_WORD;
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SDTxDMAHandler.Init.Mode=DMA_PFCTRL;
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SDTxDMAHandler.Init.Priority=DMA_PRIORITY_VERY_HIGH;
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SDTxDMAHandler.Init.FIFOMode=DMA_FIFOMODE_ENABLE;
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SDTxDMAHandler.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_FULL;
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SDTxDMAHandler.Init.MemBurst=DMA_MBURST_INC4;
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SDTxDMAHandler.Init.PeriphBurst=DMA_PBURST_INC4;
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__HAL_LINKDMA(hsd, hdmatx, SDTxDMAHandler);//将发送DMA和SD卡的发送DMA连接起来
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HAL_DMA_DeInit(&SDTxDMAHandler);
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HAL_DMA_Init(&SDTxDMAHandler); //初始化发送DMA
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HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 3, 0); //接收DMA中断优先级
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HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
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HAL_NVIC_SetPriority(DMA2_Stream6_IRQn, 3, 0); //发送DMA中断优先级
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HAL_NVIC_EnableIRQ(DMA2_Stream6_IRQn);
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#endif
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}
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//得到卡信息
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//cardinfo:卡信息存储区
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//返回值:错误状态
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u8 SD_GetCardInfo(HAL_SD_CardInfoTypedef *cardinfo)
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{
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u8 sta;
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sta=HAL_SD_Get_CardInfo(&SDCARD_Handler,cardinfo);
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return sta;
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}
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#if (SD_DMA_MODE==1) //DMA模式
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//通过DMA读取SD卡一个扇区
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//buf:读数据缓存区
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//sector:扇区地址
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//blocksize:扇区大小(一般都是512字节)
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_ReadBlocks_DMA(uint32_t *buf,uint64_t sector,uint32_t blocksize,uint32_t cnt)
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{
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u8 err=0;
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err=HAL_SD_ReadBlocks_DMA(&SDCARD_Handler,buf,sector,blocksize,cnt);//通过DMA读取SD卡一个扇区
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if(err==0)//读取成功
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{
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//等待读取完成
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err=HAL_SD_CheckReadOperation(&SDCARD_Handler,(uint32_t)SD_TIMEOUT);
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}
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return err;
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}
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//写SD卡
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//buf:写数据缓存区
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//sector:扇区地址
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//blocksize:扇区大小(一般都是512字节)
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_WriteBlocks_DMA(uint32_t *buf,uint64_t sector,uint32_t blocksize,uint32_t cnt)
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{
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u8 err=0;
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err=HAL_SD_WriteBlocks_DMA(&SDCARD_Handler,buf,sector,blocksize,cnt);//通过DMA写SD卡一个扇区
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if(err==0)//写成功
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{
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err=HAL_SD_CheckWriteOperation(&SDCARD_Handler,(uint32_t)SD_TIMEOUT);//等待读取完成/
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}
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return err;
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}
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//读SD卡
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//buf:读数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_ReadDisk(u8* buf,u32 sector,u32 cnt)
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{
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u8 sta=SD_OK;
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long long lsector=sector;
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u8 n;
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if(SDCardInfo.CardType!=STD_CAPACITY_SD_CARD_V1_1)lsector<<=9;
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if((u32)buf%4!=0)
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{
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for(n=0;n<cnt;n++)
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{
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sta=SD_ReadBlocks_DMA((uint32_t*)SDIO_DATA_BUFFER,lsector+512*n,512,1);
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memcpy(buf,SDIO_DATA_BUFFER,512);
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buf+=512;
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}
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}else
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{
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sta=SD_ReadBlocks_DMA((uint32_t*)buf,lsector, 512,cnt);
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}
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return sta;
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}
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//写SD卡
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//buf:写数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_WriteDisk(u8 *buf,u32 sector,u8 cnt)
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{
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u8 sta=SD_OK;
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long long lsector=sector;
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u8 n;
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if(SDCardInfo.CardType!=STD_CAPACITY_SD_CARD_V1_1)lsector<<=9;
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if((u32)buf%4!=0)
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{
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for(n=0;n<cnt;n++)
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{
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memcpy(SDIO_DATA_BUFFER,buf,512);
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sta=SD_WriteBlocks_DMA((uint32_t*)SDIO_DATA_BUFFER,lsector+512*n,512,1);//单个sector的写操作
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buf+=512;
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}
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}else
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{
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sta=SD_WriteBlocks_DMA((uint32_t*)buf,lsector,512,cnt);//多个sector的写操作
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}
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return sta;
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}
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//SDMMC1中断服务函数
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void SDMMC1_IRQHandler(void)
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{
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HAL_SD_IRQHandler(&SDCARD_Handler);
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}
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//DMA2数据流6中断服务函数
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void DMA2_Stream6_IRQHandler(void)
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{
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HAL_DMA_IRQHandler(SDCARD_Handler.hdmatx);
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}
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//DMA2数据流3中断服务函数
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void DMA2_Stream3_IRQHandler(void)
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{
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HAL_DMA_IRQHandler(SDCARD_Handler.hdmarx);
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}
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#else //轮训模式
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//读SD卡
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//buf:读数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_ReadDisk(u8* buf,u32 sector,u32 cnt)
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{
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u8 sta=SD_OK;
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long long lsector=sector;
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u8 n;
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lsector<<=9;
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INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
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if((u32)buf%4!=0)
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{
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for(n=0;n<cnt;n++)
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{
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sta=HAL_SD_ReadBlocks(&SDCARD_Handler,(uint32_t*)SDIO_DATA_BUFFER,lsector+512*n,512,1);//单个sector的读操作
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memcpy(buf,SDIO_DATA_BUFFER,512);
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buf+=512;
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}
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}else
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{
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sta=HAL_SD_ReadBlocks(&SDCARD_Handler,(uint32_t*)buf,lsector,512,cnt);//单个sector的读操作
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}
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INTX_ENABLE();//开启总中断
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return sta;
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}
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//写SD卡
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//buf:写数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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u8 SD_WriteDisk(u8 *buf,u32 sector,u8 cnt)
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{
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u8 sta=SD_OK;
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long long lsector=sector;
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u8 n;
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lsector<<=9;
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INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
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if((u32)buf%4!=0)
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{
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for(n=0;n<cnt;n++)
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{
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memcpy(SDIO_DATA_BUFFER,buf,512);
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sta=HAL_SD_WriteBlocks(&SDCARD_Handler,(uint32_t*)SDIO_DATA_BUFFER,lsector+512*n,512,1);//单个sector的写操作
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buf+=512;
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}
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}else
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{
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sta=HAL_SD_WriteBlocks(&SDCARD_Handler,(uint32_t*)buf,lsector,512,cnt);//多个sector的写操作
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}
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INTX_ENABLE();//开启总中断
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return sta;
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}
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#endif
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