📄 lqsdok.c
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/**************************************************************************************
龙丘MC9S12(DG128)多功能开发板
编写:邱钊鹏
Designed by Chiu Sir
E-mail:chiusir@163.com
软件版本:V1.1
最后更新:2008年11月12日
相关信息参考下列地址：
博客： http://longqiu.21ic.org
淘宝店：http://shop36265907.taobao.com
------------------------------------
Code Warrior 4.6
Target : MC9S12DG128B
Crystal: 16.000Mhz
busclock:16.000MHz
pllclock:32.000MHz
目录路径:F:\IVTech\
*****************************************************************************************/
#include <mc9s12dg128.h>
#include "LQprintp.h"
#include "LQfun.h"
#define DDR_INI() DDRT |= 0xFF
#define SD_Sel() PTS_PTS7=0 //低电平
#define SD_deSel() PTS_PTS7=1 //高电平
extern U8 RXBUF[];
extern U8 TXBUF[];
#pragma CODE_SEG DEFAULT
void New_Buf8(U8 buffer[])
{
//-- Tx & Rx Buffer initialize
int i, j=0;
for(i=0;i<512;i++) //128[word]*16[blk]=8192[byte]
*(buffer+i)='x';
}
void CLS_Buf8(U8 buffer[])
{
//-- Flushing Rx buffer
int i;
for(i=0;i<512;i++) //128[word]*16[blk]=8192[byte]
*(buffer+i)=0;
}
void View_Buf8(U8 buffer[])
{
int i=0;
for(i=0;i<512;i++)
{
if((i%32)==0) printp( "\n" );
printp("%02x,", buffer[i]);
}
}
//写、读一个字节
U8 SPI_RdWr_Byte(U8 val)
{
SPI0DR = val;
while(!(SPI0SR_SPIF));
return SPI0DR;
}
//sd卡初始化
void SD_Init(void)
{
SPI_Init();
SD_deSel();
}
//sd卡写命令
U8 SD_Send_Cmd(U8 cmd, U32 arg)
{
U8 r1;
U8 retry=0;
SPI_RdWr_Byte(0xff);
SD_Sel();
SPI_RdWr_Byte(cmd | 0x40);//分别写入命令
SPI_RdWr_Byte(arg>>24);
SPI_RdWr_Byte(arg>>16);
SPI_RdWr_Byte(arg>>8);
SPI_RdWr_Byte(arg);
SPI_RdWr_Byte(0x95);
while((r1 = SPI_RdWr_Byte(0xff)) == 0xff)//等待响应，
if(retry++ > 8) break;//超时退出
SD_deSel();
return r1;//返回状态值
}
//sd卡复位
U8 SD_Reset(void)
{
U8 i;
U8 retry;
U8 r1=0;
retry = 0;
//SPI_Low();
do
{
for(i=0;i<10;i++) SPI_RdWr_Byte(0xff);
r1 = SD_Send_Cmd(0, 0);//发idle命令
retry++;
if(retry>10) return 1;//超时退出
} while(r1 != 0x01);
retry = 0;
do
{
r1 = SD_Send_Cmd(1, 0);//发active命令
retry++;
if(retry>100) return 1;//超时退出
} while(r1);
//SPI_High();
r1 = SD_Send_Cmd(59, 0);//关crc
r1 = SD_Send_Cmd(16, 512);//设扇区大小512
return 0;//正常返回
}
#pragma CODE_SEG DEFAULT
//读一个扇区
U8 Rd_Block(U32 sector, U8* buffer)
{
U8 r1;
U16 i;
//U8 retry=0;
r1 = SD_Send_Cmd(17, sector<<9);//读命令
if(r1 != 0x00) return r1;
SD_Sel();
//等数据的开始
while(SPI_RdWr_Byte(0xff) != 0xfe);//if(retry++ > 50){SD_deSel();return 1;}
for(i=0; i<512; i++)//读512个数据
{
*buffer++ = SPI_RdWr_Byte(0xff);
}
SPI_RdWr_Byte(0xff);//伪crc
SPI_RdWr_Byte(0xff);
SD_deSel();
return 0;
}
//写一个扇区
U8 Wt_Block(U32 sector, U8* buffer)
{
U8 r1;
U16 i;
//U8 retry=0;
if(sector<1) return 0xff; //为了保护SD卡引导区，跳过该区
r1 = SD_Send_Cmd(24, sector<<9);//写命令
if(r1 != 0x00) return r1;
SD_Sel();
SPI_RdWr_Byte(0xff);
SPI_RdWr_Byte(0xff);
SPI_RdWr_Byte(0xff);
SPI_RdWr_Byte(0xfe);//发开始符
for(i=0; i<512; i++)//送512字节数据
{
SPI_RdWr_Byte(*buffer++);
}
SPI_RdWr_Byte(0xff);
SPI_RdWr_Byte(0xff);
r1 = SPI_RdWr_Byte(0xff);
if( (r1&0x1f) != 0x05)//等待是否成功
{
SD_deSel();
return r1;
}
//等待操作完
while(!SPI_RdWr_Byte(0xff));//if(retry++ > 50){SPI_CS_Deassert();return 1;}
SD_deSel();
return 0;
}
//相当的好用！
U8 WriteFile(U8* str,U16 lenth)
{
U16 i=0,startaddr=0x209; //第一个文件的地址开始于0X208
U32 record_bytes=0,from_blkhead_2_here=0;
lenth<<=1;
if(Rd_Block(0x1FF,RXBUF)) return 1; //偏移字节存放在0X1FF块地址里面
record_bytes=(RXBUF[510]) | (RXBUF[509]<<8) | (RXBUF[508]<<16); //文件字写之前已经有的节数
startaddr+=(record_bytes/512);
if(Rd_Block(startaddr,RXBUF)) return 1;
//if((RXBUF[0]==0xff)||(RXBUF[1]==0xff)) record_bytes+=2;
from_blkhead_2_here=record_bytes%512;
if((from_blkhead_2_here+lenth)<=512)
{
for(i=0;i<lenth;i+=2)
*(RXBUF + i + from_blkhead_2_here) = *(str + (i>>1));
if(Wt_Block(startaddr,RXBUF)) return 1;
View_Buf8(RXBUF);
}
else
{
for(i=from_blkhead_2_here;i<512;i+=2)
*(RXBUF+from_blkhead_2_here) = *(str+ (i>>1) -from_blkhead_2_here);
if(Wt_Block(startaddr,RXBUF)) return 1;
printp("\naddress is:0x%04x",startaddr);
View_Buf8(RXBUF);
//CLS_Buf8(RXBUF);
if(Rd_Block(startaddr+1,RXBUF)) return 1;
//if((RXBUF[0]==0xff)||(RXBUF[1]==0xff)) record_bytes+=2;
for(i=0;i<(from_blkhead_2_here+lenth - 512);i +=2)
*(RXBUF+i) = *(str + (i>>1) + 512 - from_blkhead_2_here);
if(Wt_Block(startaddr+1,RXBUF)) return 1;
printp("\naddress is:0x%04x",startaddr+1);
View_Buf8(RXBUF);
}
if(Rd_Block(0x1FF,RXBUF)) return 1;
RXBUF[510]=(U8)( record_bytes+lenth);
RXBUF[509]=(U8)((record_bytes+lenth)>>8);
RXBUF[508]=(U8)((record_bytes+lenth)>>16);
if(Wt_Block(0x1FF,RXBUF)) return 1;
//View_Buf8(RXBUF);
printp("\nfile bytes is:0x%02x%02x%02x",RXBUF[508],RXBUF[509],RXBUF[510]);
return 0;
}
/*
//总是覆盖
U8 WriteFile(U8* str,U16 lenth)
{
U16 i=0,startaddr=0x209,from_blkhead_2_here=0; //第一个文件的地址开始于0X208
U32 record_bytes=0;
if(Rd_Block(0x1FF,RXBUF)) return 1; //偏移字节存放在0X1FF块地址里面
record_bytes=(RXBUF[510]) | (RXBUF[509]<<8) | (RXBUF[508]<<16); //文件写之前已经有的节数
if(Rd_Block(startaddr,RXBUF)) return 1;
startaddr += (record_bytes/256);
if((RXBUF[0]==0xff)||(RXBUF[1]==0xff)) record_bytes++;
from_blkhead_2_here = record_bytes%256;
if((from_blkhead_2_here+lenth)<=256)
{
for(i=0; i<lenth; i++)
*(RXBUF + ((i+ from_blkhead_2_here)<<1)) = *(str + i);
if(Wt_Block(startaddr,RXBUF)) return 1;
View_Buf8(RXBUF);
}
else
{
for(i=0; i<(256-from_blkhead_2_here); i++)
*(RXBUF + ((i + from_blkhead_2_here)<<1)) = *(str + i);
if(Wt_Block(startaddr,RXBUF)) return 1;
//View_Buf8(RXBUF);
//CLS_Buf8(RXBUF);
if(Rd_Block(startaddr+1,RXBUF)) return 1;
if((RXBUF[0]==0xff)||(RXBUF[1]==0xff))
{
record_bytes++;
for(i=1; i<(from_blkhead_2_here+lenth - 255); i++) // +1
*(RXBUF + (i<<1)) = *(str + i + 255 - from_blkhead_2_here); // -1
if(Wt_Block(startaddr+1,RXBUF)) return 1;
}
else
{
for(i=0; i<(from_blkhead_2_here+lenth - 256); i++)
*(RXBUF + (i<<1)) = *(str + i + 256 - from_blkhead_2_here);
if(Wt_Block(startaddr+1,RXBUF)) return 1;
}
printp("\n current address is:0x%04x",startaddr+1);
View_Buf8(RXBUF);
}
if(Rd_Block(0x1FF,RXBUF)) return 1;
RXBUF[510]=(U8)( record_bytes+lenth);
RXBUF[509]=(U8)((record_bytes+lenth)>>8);
RXBUF[508]=(U8)((record_bytes+lenth)>>16);
if(Wt_Block(0x1FF,RXBUF)) return 1;
//View_Buf8(RXBUF);
printp("\nfile bytes is:0x%02x%02x%02x",RXBUF[508],RXBUF[509],RXBUF[510]);
return 0;
}
//相当的好用！
U8 WriteFile(U8* str,U16 lenth)
{
U16 i=0,startaddr=0x209; //第一个文件的地址开始于0X208
U32 record_bytes=0,from_blkhead_2_here=0;
lenth<<=1;
if(Rd_Block(0x1FF,RXBUF)) return 1; //偏移字节存放在0X1FF块地址里面
record_bytes=(RXBUF[510]) | (RXBUF[509]<<8) | (RXBUF[508]<<16); //文件字写之前已经有的节数
startaddr+=(record_bytes/512);
if(Rd_Block(startaddr,RXBUF)) return 1;
//if((RXBUF[0]==0xff)||(RXBUF[1]==0xff)) record_bytes+=2;
from_blkhead_2_here=record_bytes%512;
if((from_blkhead_2_here+lenth)<=512)
{
for(i=0;i<lenth;i+=2)
*(RXBUF + i + from_blkhead_2_here) = *(str + (i>>1));
if(Wt_Block(startaddr,RXBUF)) return 1;
View_Buf8(RXBUF);
}
else
{
for(i=from_blkhead_2_here;i<512;i+=2)
*(RXBUF+from_blkhead_2_here) = *(str+ (i>>1) -from_blkhead_2_here);
if(Wt_Block(startaddr,RXBUF)) return 1;
printp("\naddress is:0x%04x",startaddr);
View_Buf8(RXBUF);
//CLS_Buf8(RXBUF);
if(Rd_Block(startaddr+1,RXBUF)) return 1;
//if((RXBUF[0]==0xff)||(RXBUF[1]==0xff)) record_bytes+=2;
for(i=0;i<(from_blkhead_2_here+lenth - 512);i +=2)
*(RXBUF+i) = *(str + (i>>1) + 512 - from_blkhead_2_here);
if(Wt_Block(startaddr+1,RXBUF)) return 1;
printp("\naddress is:0x%04x",startaddr+1);
View_Buf8(RXBUF);
}
if(Rd_Block(0x1FF,RXBUF)) return 1;
RXBUF[510]=(U8)( record_bytes+lenth);
RXBUF[509]=(U8)((record_bytes+lenth)>>8);
RXBUF[508]=(U8)((record_bytes+lenth)>>16);
if(Wt_Block(0x1FF,RXBUF)) return 1;
//View_Buf8(RXBUF);
printp("\nfile bytes is:0x%02x%02x%02x",RXBUF[508],RXBUF[509],RXBUF[510]);
return 0;
}
U8 WriteFile(U8* str,U16 lenth)
{
U32 startaddr=0x208,record_bytes=0;
U16 i=0,from_blkhead_2_here=0;
if(Rd_Block(0x1FF,RXBUF)) return 1; //偏移字节存放在0X1FF块地址里面
record_bytes=(RXBUF[508])|(RXBUF[509]<<8)|(RXBUF[510]<<16); //文件字写之前已经有的节数
startaddr+=(record_bytes/512);
if(Rd_Block(startaddr,RXBUF)) return 1;
from_blkhead_2_here=record_bytes%512;
if((from_blkhead_2_here+lenth)<512)
{
for(i=0;i<lenth;i++)
*(RXBUF+i+from_blkhead_2_here)=*(str+i);
if(Wt_Block(startaddr,RXBUF)) return 1;
View_Buf8(RXBUF);
}
else
{
for(i=from_blkhead_2_here;i<512;i++)
*(RXBUF+from_blkhead_2_here)=*(str+i-from_blkhead_2_here);
if(Wt_Block(startaddr,RXBUF)) return 1;
View_Buf8(RXBUF);
CLS_Buf8(RXBUF);
for(i=0;i<(from_blkhead_2_here+lenth-512);i++)
*(RXBUF+i)=*(str+i+512-from_blkhead_2_here);
if(Wt_Block(startaddr+1,RXBUF)) return 1;
View_Buf8(RXBUF);
}
if(Rd_Block(0x1FF,RXBUF)) return 1;
RXBUF[508]=(U8) startaddr;
RXBUF[509]=(U8)(startaddr>>8);
RXBUF[510]=(U8)(startaddr>>16);
if(Wt_Block(0x1FF,RXBUF)) return 1;
View_Buf8(RXBUF);
return 0;
}
*/
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