/*
?*?@File:???drv_sdcard.c?
?*?@Author:?tianqf?
?*?@Date:???2018-1-23?17:35:46
?*?
?*?@LICENSE:?
?*?The?code?owner?is?tianqf.?Other?personnel?may?
?*?not?be?used?or?modified.
?*?
?*?Change?Logs:?
?*?Date???????????Author???????Notes?
?*?2018-1-23??????tianqf?????The?first?version.?
?*/?
?
#include?“drv_sdcard.h“
#include?“stm32f4xx.h“
#include?“sdio_sd.h“

#ifndef?SDCARD_SECTOR_SIZE
#define?SDCARD_SECTOR_SIZE?512
#endif

rt_err_t?sdcard_init（void）
{
????rt_uint8_t?ret?=?SD_OK;
???
????ret?=?SD_Init（）;

????if?（ret?==?SD_OK）
	{
		return?SD_OK;
	}
	else
	{
		return?SD_ERROR;
	}

}

rt_uint8_t?sdcard_read_blocks（rt_uint32_t?*buf?uint64_t?sector?rt_uint32_t?cnt）
{
????rt_uint8_t?ret?=?SD_OK;

#if?defined?（SD_DMA_MODE）
????ret?=?SD_ReadBlock（（uint8_t?*）buf?sector?cnt）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}

????ret?=?SD_WaitReadOperation（）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}
#else
????ret?=?SD_ReadBlock（（uint8_t?*）buf?sector?cnt）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}
#endif

????return?RT_EOK;
}

rt_uint8_t?sdcard_write_blocks（rt_uint32_t?*buf?uint64_t?sector?rt_uint32_t?cnt）
{
????rt_uint8_t?ret?=?SD_OK;
????
#if?defined?（SD_DMA_MODE）
????ret?=?SD_WriteBlock（（uint8_t?*）buf?sector?cnt）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}

????ret?=?SD_WaitWriteOperation（）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}
????
#else
????ret?=?SD_WriteBlock（（uint8_t?*）buf?sector?cnt）;
????if（ret?!=?SD_OK）
????{
????????return?RT_ERROR;
????}
#endif

????return?RT_EOK;
}


static?struct?rt_device?sdcard_device;
static?struct?rt_semaphore?sd_lock;

/*?RT-Thread?Device?Driver?Interface?*/
static?rt_err_t?rt_sdcard_init（rt_device_t?dev）
{
????
????if?（rt_sem_init（&sd_lock?“sdlock“?1?RT_IPC_FLAG_FIFO）?!=?RT_EOK）
????{
????????return?RT_ERROR;
????}

????return?RT_EOK;
}

static?rt_err_t?rt_sdcard_open（rt_device_t?dev?rt_uint16_t?oflag）
{
????return?RT_EOK;
}

static?rt_err_t?rt_sdcard_close（rt_device_t?dev）
{
????return?RT_EOK;
}

static?rt_uint32_t?sdio_buffer[512/sizeof（uint32_t）];
static?rt_size_t?rt_sdcard_read（rt_device_t?dev?rt_off_t?pos?void*?buffer?rt_size_t?size）
{
????rt_uint8_t?status?=?SD_OK;

????rt_sem_take（&sd_lock?RT_WAITING_FOREVER）;

????if（（（rt_uint32_t）buffer?&?0x03）?!=?0）
????{
????????/*?non-aligned.?*/
????????uint32_t?i;
????????uint64_t?sector_adr;
????????uint8_t*?copy_buffer;

????????sector_adr??=?（uint64_t）pos*SDCARD_SECTOR_SIZE;
????????copy_buffer?=?（uint8_t*）buffer;

????????for（i=0;?i????????{
????????????status?=?sdcard_read_blocks（sdio_buffer?sector_adr?1）;?
????????????rt_memcpy（copy_buffer?sdio_buffer?SDCARD_SECTOR_SIZE）;?

????????????sector_adr??+=?SDCARD_SECTOR_SIZE;
????????????copy_buffer?+=?SDCARD_SECTOR_SIZE;
????????}
????}
????else
????{
????????status?=

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????6072??2018-05-25?13:42??drv_sdcard.c
?????文件?????????478??2018-05-25?13:42??drv_sdcard.h
?????文件???????90898??2018-05-25?13:42??sdio_sd.c
?????文件???????18540??2018-05-25?13:42??sdio_sd.h