上星期六剛剛買的新板子,因為之前的板子是藍橋杯競賽專用板(STM32F103RB)64PIN的,外設很少,以后比賽結束還要把這個爛板子交個學校創新創業中心!
由于之前答應@藍橋杯-嵌入式交流群里面的哥們們把SD卡搞下,所以就接著新板子,來處理下SD卡這個東西(后期還將做fatfs文件系統移植)

圖1 SD接口圖
圖1 的接口圖不是完全正確的,每個PIN上都必須接一個50K的上拉電阻;
在ST官方提供的庫里面有很多意見做好的外設,LCD,EEPROM,等等,當然我們比較幸運,也包括SD卡,這次移植基于3.5的庫
我們要移植的文件在這個STM32F10x_StdPeriph_Lib_V3.5.0\Utilities\STM32_EVAL下:

圖2 移植需要的文件
因為我的板子是stm32f103vet6跟STM3210E_EVAL比較相近,所以選這個;

圖3 common目錄
把stm32_eval_spi_sd.c /?stm32_eval_spi_sd.h 復制到你的工程里面,并添加;如果就這樣編譯的話有很多error和warning;
因為他里面確實一些函數,這些函數屬于API層、或者說是驅動層的,跟處理器有關,所以我們就要到STM3210E_EVAL目錄下看看了。
如果你把上面那個直接拿過去編譯的話,會提示少下面一些函數:
~~~
void SD_LowLevel_DeInit(void);
void SD_LowLevel_Init(void);
void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize);
void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize);
uint32_t SD_DMAEndOfTransferStatus(void);
~~~
和一些宏定義:
~~~
/**
* @brief SD FLASH SDIO Interface
*/
#define SD_DETECT_PIN GPIO_Pin_11 /* PF.11 */
#define SD_DETECT_GPIO_PORT GPIOF /* GPIOF */
#define SD_DETECT_GPIO_CLK RCC_APB2Periph_GPIOF
#define SDIO_FIFO_ADDRESS ((uint32_t)0x40018080)
/**
* @brief SDIO Intialization Frequency (400KHz max)
*/
#define SDIO_INIT_CLK_DIV ((uint8_t)0xB2)
/**
* @brief SDIO Data Transfer Frequency (25MHz max)
*/
#define SDIO_TRANSFER_CLK_DIV ((uint8_t)0x00)
~~~
這些聲明和定義都在STM3210E_EVAL目錄下的?"stm3210e_eval.h"里面,找到他們并復制到stm32_eval_spi_sd.h里面,如果你不想找的話,直接把我的這些復制走就好了!
對應的函數也都在"stm3210e_eval.c"里面;
~~~
/**
* @brief DeInitializes the SDIO interface.
* @param None
* @retval None
*/
void SD_LowLevel_DeInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*!< Disable SDIO Clock */
SDIO_ClockCmd(DISABLE);
/*!< Set Power State to OFF */
SDIO_SetPowerState(SDIO_PowerState_OFF);
/*!< DeInitializes the SDIO peripheral */
SDIO_DeInit();
/*!< Disable the SDIO AHB Clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, DISABLE);
/*!< Configure PC.08, PC.09, PC.10, PC.11, PC.12 pin: D0, D1, D2, D3, CLK pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/*!< Configure PD.02 CMD line */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
/**
* @brief Initializes the SD Card and put it into StandBy State (Ready for
* data transfer).
* @param None
* @retval None
*/
void SD_LowLevel_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*!< GPIOC and GPIOD Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);
/*!< Configure PC.08, PC.09, PC.10, PC.11, PC.12 pin: D0, D1, D2, D3, CLK pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/*!< Configure PD.02 CMD line */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
/*!< Enable the SDIO AHB Clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE);
/*!< Enable the DMA2 Clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
}
/**
* @brief Configures the DMA2 Channel4 for SDIO Tx request.
* @param BufferSRC: pointer to the source buffer
* @param BufferSize: buffer size
* @retval None
*/
void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_ClearFlag(DMA2_FLAG_TC4 | DMA2_FLAG_TE4 | DMA2_FLAG_HT4 | DMA2_FLAG_GL4);
/*!< DMA2 Channel4 disable */
DMA_Cmd(DMA2_Channel4, DISABLE);
/*!< DMA2 Channel4 Config */
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)BufferSRC;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA2_Channel4, &DMA_InitStructure);
/*!< DMA2 Channel4 enable */
DMA_Cmd(DMA2_Channel4, ENABLE);
}
/**
* @brief Configures the DMA2 Channel4 for SDIO Rx request.
* @param BufferDST: pointer to the destination buffer
* @param BufferSize: buffer size
* @retval None
*/
void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_ClearFlag(DMA2_FLAG_TC4 | DMA2_FLAG_TE4 | DMA2_FLAG_HT4 | DMA2_FLAG_GL4);
/*!< DMA2 Channel4 disable */
DMA_Cmd(DMA2_Channel4, DISABLE);
/*!< DMA2 Channel4 Config */
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)BufferDST;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA2_Channel4, &DMA_InitStructure);
/*!< DMA2 Channel4 enable */
DMA_Cmd(DMA2_Channel4, ENABLE);
}
/**
* @brief Returns the DMA End Of Transfer Status.
* @param None
* @retval DMA SDIO Channel Status.
*/
uint32_t SD_DMAEndOfTransferStatus(void)
{
return (uint32_t)DMA_GetFlagStatus(DMA2_FLAG_TC4);
}
~~~
同樣,把這些復制到stm32_eval_spi_sd.c里面;你也可以從這里直接復制!
就這么多,如果你不是我這個平臺的處理器,那么一定要注意找到適合你自己的再移植!
**如何判別是否適合呢?**
在STM321xxxE_EVAL目錄下的stm32xxxe_eval.c里面看函數void SD_LowLevel_DeInit(void);看他初始化的管腳是否是你的外設管腳;
~~~
/*!< Configure PC.08, PC.09, PC.10, PC.11, PC.12 pin: D0, D1, D2, D3, CLK pin */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
~~~
OK!這些移植好后,我們可以到STM32F10x_StdPeriph_Lib_V3.5.0\Project\STM32F10x_StdPeriph_Examples\SDIO\uSDCard里面把例程移植一個看看效果怎么樣;
我這里用了這個代碼,看看他有SD卡有多大:
~~~
Status = SD_Init();
Status = SD_GetCardInfo(&SDCardInfo);
printf("%d,%d\n",SDCardInfo.CardBlockSize,SDCardInfo.CardCapacity);
Status = SD_SelectDeselect((uint32_t) (SDCardInfo.RCA << 16));
Status = SD_EnableWideBusOperation(SDIO_BusWide_4b);
Status = SD_ReadBlock(buff, 0x00, 512);
if (Status == SD_OK)
printf("\nRead%s",buff);
printf("Test SD OK!");
~~~

圖4:?效果圖
【1:block size ? 2:memory size ? 3:read message】
今天就先到這里了!周日之前把fatfs文件系統移植好!
再次感謝 @STM32-粵-十萬 ?的啟發!!!
藍橋杯-嵌入式交流群
147520657
- 前言
- 【菜鳥入門】stm32的第一個程序--LED
- 【菜鳥入門】stm32 之 掃描按鍵
- 【菜鳥入門】stm32 之 中斷按鍵
- 【菜鳥入門】stm32 之 USART
- 【菜鳥入門】stm32 之 iic
- 【菜鳥入門】stm32 之 eeprom
- 【菜鳥入門】stm32 之 pwm
- 【菜鳥入門】stm32 之 ADC 模數轉換
- 【菜鳥入門】stm32 之 實時時鐘
- 【菜鳥入門】stm32 之 DMA
- 【菜鳥入門】stm32 之 DAC
- 【STM庫應用】stm32 之 USART
- 中斷源去抖辦法
- stm32 啟動代碼應用技巧
- 【STM庫應用】stm32 之 IIC應用
- 【STM庫應用】stm32 之 中斷按鍵初始化(注意事項)
- 關于結構體初始化
- 【STM庫應用】stm32 之 TIM (詳解一 通用定時器)
- 【STM庫應用】stm32 之 TIM (詳解二 脈沖寬度、周期測量)
- 【stm32庫應用】SD驅動移植(基于SDIO外設)
- SD卡fat文件系統移植
- stm32 DMA初始化選項研究
- stm32 靈活靜態存儲控制器(FSMC)(NORFLASH\PSRAM)
- 【stm32+uC/OS-II】ucosii移植簡單詳細步驟
- STM32 加入調試信息來調試代碼
- NRF24L01 無線通信模塊使用