//
//Read Sector(s)
//
DRESULT disk_read(
uint8_t drv, /* Physical drive nmuber (0..) */
uint8_t* buff, /* Data buffer to store read data */
uint32_t sector, /* Sector address (LBA) */
uint8_t count /* Number of sectors to read (1..255) */
)
{
DRESULT res = RES_ERROR;
switch(drv)
{
#ifdef FUNC_CARD_EN
case DEV_ID_SD :
if(!SdReadBlock(sector, buff, count))
{
res = RES_OK;
}
break;
#endif //FUNC_CARD_EN
#ifdef FUNC_USB_EN
case DEV_ID_USB :
if(HostStorReadBlock(sector, buff, count))
{
res = RES_OK;
}
#endif //FUNC_USB_EN
default:
break;
}
return res;
}
/*******************************************************************************
* 函 数 名 ：ShowFullSDPic
* 函数功能 ：显示SD卡的bin文件形式的图片
* 输 入 ：add 图片起始地址，通过winhex查看
* 输 出 ：无
*******************************************************************************/
void ShowFullSDPic(unsigned long add)
{
unsigned long i=0,j=0,k=0;
AddressSet(0,0,239,319);
while(i < 76800)//240*320
{
LED = ~LED;
SdReadBlock(DATA,add+k*512,512);
for(j=0;j<256;j++)
{
LcdWriteData(DATA[j*2+1],DATA[j*2]); //写一个像素点
i++;
if(i >= 76800) break;
}
k++;
}
}
/*******************************************************************************
* 函 数 名: main
* 函数功能: 主函数
* 输 入: 无
* 输 出: 无
*******************************************************************************/
void main()
{
//彩屏实验时最好关闭数码管的锁存器，避免数码管乱闪
DULA = 1;
P0 = 0xff;
DULA = 0;
WELA = 1;
P0 = 0xff;
WELA = 0;
LcdInit();
CLeanFullScreen(0xff,0xff);//清屏
ShowString(0,0,"LCD init OK",RED,WHITE);
if(!SdInit())
{
ShowString(0,20,"SD Init Fail",RED,WHITE);
while(1);
}
if(!SdReadBlock(DATA,TXTADD,512))
{
ShowString(0,20,"SD Read Fail",RED,WHITE);
while(1);
}
ShowString(0,20,DATA,RED,WHITE);//显示TXT文本内容
Delayms(1000);
while (1)
{
ShowFullSDPic(PIC1ADD);
Delayms(2000);
ShowFullSDPic(PIC2ADD);
Delayms(2000);
}
}
