Eclipse开发调试ARM裸机程序(七)sd卡读写
一
、命令
和nandflash操作都很相似，都是发送不同命令进行不同的操作。命令有很多，但是用到这几个。
CMD0 使SD卡进入Idle状态 CMD2 广播获取卡的CID信息 CMD3 广播获取SD卡所分配的相对地址 CMD7 根据获取指定的RCA,选中SD卡 CMD9 获取SD相关的存储信息,如块大小,容量等（CSD寄存器） CMD12 停止多块传输操作 CMD13 获取卡的状态 CMD17 使SD卡进入传输状态,读取单个块 CMD18 使SD卡进入传输状态,读取多个块,直到收到CMD12为止 CMD24 使SD卡进入传输状态,写入单个块 CMD25 使SD卡进入传输状态,写入多个块 CDM55 特殊指令前命令,在发送ACMD类指令前,需要发送此命令 ACMD41 获取SD电压值
二
、模式
SD卡支持SPI模式和SD模式，没有用SPI模式。
三
、寄存器
SD卡的寄存器有这些：
每个寄存器都有特定的含义，我这里真分析的CSD寄存器，并用一个小程序算出每个参数的值。
先用Android手机或者开发板下载一个应用 “sd tools”，这样可以显示出SD卡的CSD，然后根据手册《SD Specifications Part 1 Physical Layer Simplified Specification Version 4.10 January 22, 2013》。测试的SD卡的CSD码值如图所示：
小程序如下：
#include <stdio.h>
#include <math.h>
typedef unsigned int u_size;
int main()
{
u_size a = 0, b = 0, c = 0, d = 0;
//CSD = 003e00325b5a83c5e597ffff12800000
a = 0x003e0032; //[127:96]
b = 0x5b5a83c5; //[95 :64]
c = 0xe597ffff; //[63 :32]
d = 0x12800000; //[31 :0 ]
u_size CSD_STRUCTURE = a / (u_size)pow(2,30) & 0x3; // [127:126 - 96]
u_size TAAC = a/(u_size)pow(2,16) & 0xff; // [119:112]
u_size NSAC = a/(u_size)pow(2,8) & 0xff; // [111:104]
u_size TRAN_SPEED = a/(u_size)pow(2,0) & 0xff; // [103:96 - 96]
u_size CCC = b/(u_size)pow(2,20) & 0xfff;
u_size READ_BL_LEN = b/(u_size)pow(2,16) & 0xf; // [83:80-64]
u_size READ_BL_PARTIA = b/(u_size)pow(2,15) & 0x1;
u_size WRITE_BLK_MISALIGN = b/(u_size)pow(2,14) & 0x1;
u_size READ_BLK_MISALIGN = b/(u_size)pow(2,13) & 0x1;
u_size DSR_IMP = b/(u_size)pow(2,12) & 0x1;
u_size C_SIZE = (b & 0x3ff)*(u_size)pow(2,2) \
+ ((c /(u_size)pow(2,30)) & 0x3); // [73:62]
u_size VDD_R_CURR_MIN = c/(u_size)pow(2,27) & 0x7;
u_size VDD_R_CURR_MAX = c/(u_size)pow(2,24) & 0x7;
u_size VDD_W_CURR_MIN = c/(u_size)pow(2,21) & 0x7;
u_size VDD_W_CURR_MAX = c/(u_size)pow(2,18) & 0x7;
u_size C_SIZE_MULT = c/(u_size)pow(2,15) & 0x7; // [49:47]
u_size ERASE_BLK_EN = d/(u_size)pow(2,14) & 0x1;
u_size SECTOR_SIZE = d/(u_size)pow(2,7) & 0xef;
u_size WP_GRP_SIZE = c/(u_size)pow(2,0) & 0xef;
u_size WP_GRP_ENABLE = d/(u_size)pow(2,31) & 0x1;
u_size R2W_FACTOR = d/(u_size)pow(2,26) & 0x7;
u_size WRITE_BL_LEN = d/(u_size)pow(2,22) & 0xf;
u_size WRITE_BL_PARTIAL = d/(u_size)pow(2,21) & 0x1;
u_size TMP_WRITE_PROTECT = d/(u_size)pow(2,12) & 0x1;
u_size FILE_FORMAT = d/(u_size)pow(2,10) & 0x3;
u_size CRC = d/(u_size)pow(2,1) & 0xff;
long C = (C_SIZE + 1) * pow(2, (C_SIZE_MULT+2)) * pow(2, READ_BL_LEN);
// C = (3863 + 1) * 512 * 1024
printf(" 1. CSD_STRUCTURE = 0x%x\n", CSD_STRUCTURE);
printf(" 3. TAAC = 0x%x\n", TAAC);
printf(" 4. NSAC = 0x%x\n", NSAC);
printf(" 5. TRAN_SPEED = 0x%x (0x32==>25MHz;0x5a==>50MHz)\n", TRAN_SPEED);
printf(" 6. CCC = 0x%x\n", CCC);
printf(" 7. READ_BL_LEN = %d\n", READ_BL_LEN);
printf(" 8. READ_BL_PARTIA = %d\n", READ_BL_PARTIA);
printf(" 9. WRITE_BLK_MISALIGN = %d\n", WRITE_BLK_MISALIGN);
printf("10. READ_BLK_MISALIGN = %d\n", READ_BLK_MISALIGN);
printf("11. DSR_IMP = %d\n", DSR_IMP);
printf("12. / *No Use* /\n");
printf("13. C_SIZE = %d\n", C_SIZE);
printf("14. VDD_R_CURR_MIN = %d\n", VDD_R_CURR_MIN);
printf("15. VDD_R_CURR_MAX = %d\n", VDD_R_CURR_MAX);
printf("16. VDD_W_CURR_MIN = %d\n", VDD_W_CURR_MIN);
printf("17. VDD_W_CURR_MAX = %d\n", VDD_W_CURR_MAX);
printf("18. C_SIZE_MULT = %d\t""(本SD卡容量 = %f G)\n", C_SIZE_MULT, (float)C/1073741824);
printf("19. ERASE_BLK_EN = 0x%x\n", ERASE_BLK_EN);
printf("20. SECTOR_SIZE = 0x%x\n", SECTOR_SIZE);
printf("21. WP_GRP_SIZE = 0x%x\n", WP_GRP_SIZE);
printf("22. WP_GRP_ENABLE = 0x%x\n", WP_GRP_ENABLE);
printf("23. / *No Use* /\n");
printf("24. R2W_FACTOR = 0x%x\n", R2W_FACTOR);
printf("25. WRITE_BL_LEN = 0x%x\n", WRITE_BL_LEN);
printf("26. WRITE_BL_PARTIAL = 0x%x\n", WRITE_BL_PARTIAL);
printf("31. TMP_WRITE_PROTECT = 0x%x\n", TMP_WRITE_PROTECT);
printf("32. FILE_FORMAT = 0x%x\n", FILE_FORMAT);
printf("34. CRC = 0x%x\t", CRC);
return 0;
}
运行结果如下：
S3C2440上的寄存器就多了，有几个难以理解的写下来：
SDICCON的后7位是发送命令值。但是真正填写的时候并不是命令值而是＆上了一个值（0x64），这个还没有找出原因所在。例如如果发送命令2，SDICCON的后7位应该是这样的：(0x40 | 2)。
四
、文件系统
如果只是简单的放一个数据，没有文件系统会显示无力，就无法在PC直接上查看。SD卡应该有一个文件系统如常用的fat32。这个u-boot中有实现，这里就先不做了。
五
、代码
完整代码这里下载：http://download.youkuaiyun.com/detail/kangear/5303482
这里贴出sdi.c:
/**
* @file sdi.c
* @brief sd卡 读写
* @details 本程序实现了，读SD卡的CSD寄存器；读写SD卡，并用LED显示。
* 程序正常：led1首先点亮，然后是0-15的二进制显示
* 程序出错：led2首先点亮，然后是乱无序的二进制显示
* 目前只能读写2G以下的SD卡
* （启动代码是适用于mini2440 nand 256M的开发板）
* 读写SD有三种模式：中断，DMA中断，查询。本程序使用的是查询
* @author kangear
* @date 2013-4-26
* @version A001
* @par Copyright (c):
* XXX公司
* @par History:
* version: author, date, desc\n
*
* docs 1.SD Specifications Part 1 Physical Layer Simplified Specification Version 4.10 January 22, 2013.pdf
* 2.SD Specifications Part A1 Advanced Security SD Extension Simplified Specification Version 2.00 May 18, 2010.pdf
* 3.SD Specifications Part A2 SD Host Controller Simplified Specification Version 3.00 February 25, 2011.pdf
* 4.SD Specifications Part E1 SDIO Simplified Specification Version 3.00 February 25, 2011.pdf
*
* download addr:https://www.sdcard.org/downloads/pls/simplified_specs/
*/
//#include <stdio.h>
//#include <string.h>
#include "def.h"
//#include "option.h"
//#include "2440addr.h"
#include "s3c24xx.h"
//#include "2440lib.h"
#include "sdi.h"
/*
* 用在SDICCON中的[７:０] 现在没有搞懂它的实际意义
* ＣＭＤ１ ＝ MAGIC_NUMBER | 1
*/
#define MAGIC_NUMBER 64
#define INICLK 300000
#define SDCLK 24000000 //PCLK=49.392MHz
#define POL 0
#define INT 1
#define DMA 2
int CMD13(void); // Send card status
int CMD9(void);
unsigned int *Tx_buffer; //128[word]*16[blk]=8192[byte]
unsigned int *Rx_buffer; //128[word]*16[blk]=8192[byte]
volatile unsigned int rd_cnt;
volatile unsigned int wt_cnt;
volatile unsigned int block;
volatile unsigned int TR_end=0;
int Wide=0; // 0:1bit, 1:4bit
int MMC=0; // 0:SD , 1:MMC
int Maker_ID;
char Product_Name[7];
int Serial_Num;
int PCLK = 50000000;
volatile int RCA;
void Test_SDI(void)
{
U32 save_rGPEUP, save_rGPECON;
RCA=0;
MMC=0;
block=3072; //3072Blocks=1.5MByte, ((2Block=1024Byte)*1024Block=1MByte)
save_rGPEUP=GPEUP;
save_rGPECON=GPECON;
GPEUP = 0xf83f; // SDCMD, SDDAT[3:0] => PU En.
GPECON = 0xaaaaaaaa; //SDCMD, SDDAT[3:0]
//Uart_Printf("\nSDI Card Write and Read Test\n");
if(!SD_card_init())
return;
TR_Buf_new();
Wt_Block();
Rd_Block();
View_Rx_buf();
Card_sel_desel(0); // Card deselect
if(!CMD9())
//Uart_Printf("Get CSD fail!!!\n");
SDIDCON=0;//tark???
SDICSTA=0xffff;
GPEUP=save_rGPEUP;
GPECON=save_rGPECON;
}
void TR_Buf_new(void)
{
//-- Tx & Rx Buffer initialize
int i, j;
Tx_buffer=(unsigned int *)0x31000000;
j=0;
for(i=0;i<2048;i++) //128[word]*16[blk]=8192[byte]
*(Tx_buffer+i)=i+j;
Flush_Rx_buf();
}
void Flush_Rx_buf(void)
{
//-- Flushing Rx buffer
int i;
Rx_buffer=(unsigned int *)0x31800000;
for(i=0;i<2048;i++) //128[word]*16[blk]=8192[byte]
*(Rx_buffer+i)=0;
//Uart_Printf("End Rx buffer flush\n");
}
void View_Rx_buf()
{
//-- Display Rx buffer
int i,error=0;
Tx_buffer=(unsigned int *)0x31000000;
Rx_buffer=(unsigned int *)0x31800000;
//Uart_Printf("Check Rx data\n");
for(i=0;i<128*block;i++)
{
if(Rx_buffer[i] != Tx_buffer[i])
{
//Uart_Printf("\nTx/Rx error\n");
//Uart_Printf("%d:Tx-0x%08x, Rx-0x%08x\n",i,Tx_buffer[i], Rx_buffer[i]);
error=1;
break;
}
Uart_Printf(".");
}
if(!error)
{
//Uart_Printf("\nThe Tx_buffer is same to Rx_buffer!\n");
//Uart_Printf("SD CARD Write and Read test is OK!\n");
}
}
void View_Tx_buf(void)
{
}
int SD_card_init(void)
{
//-- SD controller & card initialize
int i;
/* Important notice for MMC test condition */
/* Cmd & Data lines must be enabled by pull up resister */
SDIPRE=PCLK/(INICLK)-1; // 400KHz
//Uart_Printf("Init. Frequency is %dHz\n",(PCLK/(SDIPRE+1)));
SDICON=(1<<4)|1; // Type B, clk enable
SDIFSTA=SDIFSTA|(1<<16); //YH 040223 FIFO reset
SDIBSIZE=0x200; // 512byte(128word)
SDIDTIMER=0x7fffff; // Set timeout count
for(i=0;i<0x1000;i++); // Wait 74SDCLK for MMC card
CMD0();
//Uart_Printf("In idle\n");
//-- Check SD card OCR
if(!Chk_SD_OCR())
{
// fail
GPBDAT = (~(2<<5)); // 点亮LED2
//Uart_Printf("Initialize fail\nNo Card assertion\n");
return 0;
}
// Uart_Printf("In SD ready\n");
GPBDAT = (~(1<<5)); // 点亮LED1
do
{
//-- Check attaced cards, it makes card identification state
SDICARG = 0x0; // CMD2(stuff bit)
SDICCON = (0x1 << 10) | (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 2); //lng_resp, wait_resp, start, CMD2
//-- Check end of CMD2
} while (!Chk_CMDend(2, 1));
SDICSTA=0xa00; // Clear cmd_end(with rsp)
//Uart_Printf("End id\n");
do
{
//--Send RCA
SDICARG = MMC << 16; // CMD3(MMC:Set RCA, SD:Ask RCA-->SBZ)
SDICCON = (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 3); // sht_resp, wait_resp, start, CMD3
//-- Check end of CMD3
if (!Chk_CMDend(3, 1))
continue;
SDICSTA = 0xa00; // Clear cmd_end(with rsp)
//--Publish RCA
RCA = (SDIRSP0 & 0xffff0000) >> 16;
//Uart_Printf("RCA=0x%x\n",RCA);
SDIPRE = PCLK / (SDCLK) - 1; // Normal clock=25MHz
//Uart_Printf("SD Frequency is %dHz\n",(PCLK/(SDIPRE+1)));
//--State(stand-by) check
if (SDIRSP0 & 0x1e00 != 0x600) // CURRENT_STATE check
continue;
} while (0);
//Uart_Printf("In stand-by\n");
Card_sel_desel(1); // Select
Set_4bit_bus();
return 1;
}
void Card_sel_desel(char sel_desel)
{
//-- Card select or deselect
if(sel_desel)
{
do
{
SDICARG = RCA << 16; // CMD7(RCA,stuff bit)
SDICCON = (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 7); // sht_resp, wait_resp, start, CMD7
//-- Check end of CMD7
if (!Chk_CMDend(7, 1))
continue;
SDICSTA = 0xa00; // Clear cmd_end(with rsp)
//--State(transfer) check
if (SDIRSP0 & 0x1e00 != 0x800)
continue;
} while (0);
}
else
{
do
{
SDICARG = 0 << 16; //CMD7(RCA,stuff bit)
SDICCON = (0x1 << 8) | (MAGIC_NUMBER | 7); //no_resp, start, CMD7
//-- Check end of CMD7
if (!Chk_CMDend(7, 0))
continue;
} while (0);
SDICSTA=0x800; // Clear cmd_end(no rsp)
}
}
//void __irq Rd_Int(void)
//{
// U32 i,status;
//
// status=SDIFSTA;
// if( (status&0x200) == 0x200 ) // Check Last interrupt?
// {
// for(i=(status & 0x7f)/4;i>0;i--)
// {
// *Rx_buffer++=SDIDAT;
// rd_cnt++;
// }
// SDIFSTA=SDIFSTA&0x200; //Clear Rx FIFO Last data Ready, YH 040221
// }
// else if( (status&0x80) == 0x80 ) // Check Half interrupt?
// {
// for(i=0;i<8;i++)
// {
// *Rx_buffer++=SDIDAT;
// rd_cnt++;
// }
// }
//
// ClearPending(BIT_SDI);
//}
//void __irq Wt_Int(void)
//{
// ClearPending(BIT_SDI);
//
// SDIDAT=*Tx_buffer++;
// wt_cnt++;
//
// if(wt_cnt==128*block)
// {
// rINTMSK |= BIT_SDI;
// SDIDAT=*Tx_buffer;
// TR_end=1;
// }
//}
//
//void __irq DMA_end(void)
//{
// ClearPending(BIT_DMA0);
//
// TR_end=1;
//}
void Rd_Block(void)
{
U32 mode;
int status;
rd_cnt=0;
//Uart_Printf("Block read test[ Polling read ]\n");
mode = 0 ;
SDIFSTA=SDIFSTA|(1<<16); // FIFO reset
if(mode!=2)
SDIDCON=(2<<22)|(1<<19)|(1<<17)|(Wide<<16)|(1<<14)|(2<<12)|(block<<0); //YH 040220
SDICARG=0x0; // CMD17/18(addr)
RERDCMD:
switch(mode)
{
case POL:
if(block<2) // SINGLE_READ
{
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 17); // sht_resp, wait_resp, dat, start, CMD17
if(!Chk_CMDend(17, 1)) //-- Check end of CMD17
goto RERDCMD;
}
else // MULTI_READ
{
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 18); // sht_resp, wait_resp, dat, start, CMD18
if(!Chk_CMDend(18, 1)) //-- Check end of CMD18
goto RERDCMD;
}
SDICSTA=0xa00; // Clear cmd_end(with rsp)
while(rd_cnt<128*block) // 512*block bytes
{
if((SDIDSTA&0x20)==0x20) // Check timeout
{
SDIDSTA=(0x1<<0x5); // Clear timeout flag
break;
}
status=SDIFSTA;
if((status&0x1000)==0x1000) // Is Rx data?
{
*Rx_buffer++=SDIDAT;
rd_cnt++;
}
}
break;
// case INT:
// pISR_SDI=(unsigned)Rd_Int;
// rINTMSK = ~(BIT_SDI);
//
// rSDIIMSK=5; // Last & Rx FIFO half int.
//
// if(block<2) // SINGLE_READ
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 17); // sht_resp, wait_resp, dat, start, CMD17
// if(!Chk_CMDend(17, 1)) //-- Check end of CMD17
// goto RERDCMD;
// }
// else // MULTI_READ
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 18); // sht_resp, wait_resp, dat, start, CMD18
// if(!Chk_CMDend(18, 1)) //-- Check end of CMD18
// goto RERDCMD;
// }
//
// SDICSTA=0xa00; // Clear cmd_end(with rsp)
//
// while(rd_cnt<128*block);
//
// rINTMSK |= (BIT_SDI);
// rSDIIMSK=0; // All mask
// break;
//
// case DMA:
// pISR_DMA0=(unsigned)DMA_end;
// rINTMSK = ~(BIT_DMA0);
// SDIDCON=SDIDCON|(1<<24); //YH 040227, Burst4 Enable
//
// rDISRC0=(int)(SDIDAT); // SDIDAT
// rDISRCC0=(1<<1)+(1<<0); // APB, fix
// rDIDST0=(U32)(Rx_buffer); // Rx_buffer
// rDIDSTC0=(0<<1)+(0<<0); // AHB, inc
// rDCON0=(1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(2<<24)+(1<<23)+(1<<22)+(2<<20)+128*block;
//
// rDMASKTRIG0=(0<<2)+(1<<1)+0; //no-stop, DMA2 channel on, no-sw trigger
//
// SDIDCON=(2<<22)|(1<<19)|(1<<17)|(Wide<<16)|(1<<15)|(1<<14)|(2<<12)|(block<<0);
// if(block<2) // SINGLE_READ
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 17); // sht_resp, wait_resp, dat, start, CMD17
// if(!Chk_CMDend(17, 1)) //-- Check end of CMD17
// goto RERDCMD;
// }
// else // MULTI_READ
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 18); // sht_resp, wait_resp, dat, start, CMD18
// if(!Chk_CMDend(18, 1)) //-- Check end of CMD18
// goto RERDCMD;
// }
//
// SDICSTA=0xa00; // Clear cmd_end(with rsp)
// while(!TR_end);
// Uart_Printf("SDIFSTA=0x%x\n",SDIFSTA);
// rINTMSK |= (BIT_DMA0);
// TR_end=0;
// rDMASKTRIG0=(1<<2); //DMA0 stop
// break;
default:
break;
}
//-- Check end of DATA
if(!Chk_DATend())
//Uart_Printf("dat error\n");
SDIDCON=SDIDCON&~(7<<12);
SDIFSTA=SDIFSTA&0x200; //Clear Rx FIFO Last data Ready, YH 040221
SDIDSTA=0x10; // Clear data Tx/Rx end detect
if(block>1)
{
RERCMD12:
//--Stop cmd(CMD12)
SDICARG=0x0; //CMD12(stuff bit)
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 12);//sht_resp, wait_resp, start, CMD12
//-- Check end of CMD12
if(!Chk_CMDend(12, 1))
goto RERCMD12;
SDICSTA=0xa00; // Clear cmd_end(with rsp)
}
}
void Wt_Block(void)
{
U32 mode;
int status;
wt_cnt=0;
//Uart_Printf("Block write test[ Polling write ]\n");
mode = 0 ;
SDIFSTA=SDIFSTA|(1<<16); //YH 040223 FIFO reset
if(mode!=2)
SDIDCON=(2<<22)|(1<<20)|(1<<17)|(Wide<<16)|(1<<14)|(3<<12)|(block<<0); //YH 040220
SDICARG=0x0; // CMD24/25(addr)
REWTCMD:
switch(mode)
{
case POL:
if(block<2) // SINGLE_WRITE
{
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 24); //sht_resp, wait_resp, dat, start, CMD24
if(!Chk_CMDend(24, 1)) //-- Check end of CMD24
goto REWTCMD;
}
else // MULTI_WRITE
{
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 25); //sht_resp, wait_resp, dat, start, CMD25
if(!Chk_CMDend(25, 1)) //-- Check end of CMD25
goto REWTCMD;
}
SDICSTA=0xa00; // Clear cmd_end(with rsp)
while(wt_cnt<128*block)
{
status=SDIFSTA;
if((status&0x2000)==0x2000)
{
SDIDAT=*Tx_buffer++;
wt_cnt++;
Uart_Printf("Block No.=%d, wt_cnt=%d\n",block,wt_cnt);
}
}
break;
// case INT:
// pISR_SDI=(unsigned)Wt_Int;
// rINTMSK = ~(BIT_SDI);
//
// rSDIIMSK=0x10; // Tx FIFO half int.
//
// if(block<2) // SINGLE_WRITE
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 24); //sht_resp, wait_resp, dat, start, CMD24
// if(!Chk_CMDend(24, 1)) //-- Check end of CMD24
// goto REWTCMD;
// }
// else // MULTI_WRITE
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 25); //sht_resp, wait_resp, dat, start, CMD25
// if(!Chk_CMDend(25, 1)) //-- Check end of CMD25
// goto REWTCMD;
// }
//
// SDICSTA=0xa00; // Clear cmd_end(with rsp)
//
// while(!TR_end);
// //while(wt_cnt<128);
//
// rINTMSK |= (BIT_SDI);
// TR_end=0;
// rSDIIMSK=0; // All mask
// break;
//
// case DMA:
// pISR_DMA0=(unsigned)DMA_end;
// rINTMSK = ~(BIT_DMA0);
// SDIDCON=SDIDCON|(1<<24); //YH 040227, Burst4 Enable
//
// rDISRC0=(int)(Tx_buffer); // Tx_buffer
// rDISRCC0=(0<<1)+(0<<0); // AHB, inc
// rDIDST0=(U32)(SDIDAT); // SDIDAT
// rDIDSTC0=(1<<1)+(1<<0); // APB, fix
// rDCON0=(1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(2<<24)+(1<<23)+(1<<22)+(2<<20)+128*block;
// //handshake, sync PCLK, TC int, single tx, single service, SDI, H/W request,
// //auto-reload off, word, 128blk*num
// rDMASKTRIG0=(0<<2)+(1<<1)+0; //no-stop, DMA0 channel on, no-sw trigger
//
// SDIDCON=(2<<22)|(1<<20)|(1<<17)|(Wide<<16)|(1<<15)|(1<<14)|(3<<12)|(block<<0); //YH 040220
//
// // Word Tx, Tx after rsp, blk, 4bit bus, dma enable, Tx start, blk num
// if(block<2) // SINGLE_WRITE
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 24); //sht_resp, wait_resp, dat, start, CMD24
// if(!Chk_CMDend(24, 1)) //-- Check end of CMD24
// goto REWTCMD;
// }
// else // MULTI_WRITE
// {
// SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 25); //sht_resp, wait_resp, dat, start, CMD25
// if(!Chk_CMDend(25, 1)) //-- Check end of CMD25
// goto REWTCMD;
// }
//
// SDICSTA=0xa00; // Clear cmd_end(with rsp)
//
// while(!TR_end);
//
// rINTMSK |= (BIT_DMA0);
// TR_end=0;
// rDMASKTRIG0=(1<<2); //DMA0 stop
//
// break;
default:
break;
}
//-- Check end of DATA
if(!Chk_DATend())
//Uart_Printf("dat error\n");
SDIDCON=SDIDCON&~(7<<12); //YH 040220, Clear Data Transfer mode => no operation, Cleata Data Transfer start
SDIDSTA=0x10; // Clear data Tx/Rx end
if(block>1)
{
//--Stop cmd(CMD12)
REWCMD12:
SDIDCON=(1<<18)|(1<<17)|(0<<16)|(1<<14)|(1<<12)|(block<<0); //YH 040220
SDICARG=0x0; //CMD12(stuff bit)
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 12); //sht_resp, wait_resp, start, CMD12
//-- Check end of CMD12
if(!Chk_CMDend(12, 1))
goto REWCMD12;
SDICSTA=0xa00; // Clear cmd_end(with rsp)
//-- Check end of DATA(with busy state)
if(!Chk_BUSYend())
//Uart_Printf("error\n");
SDIDSTA=0x08; //! Should be cleared by writing '1'.
}
}
void Delay(volatile unsigned long dly)
{
for(; dly > 0; dly--);
}
int Chk_CMDend(int cmd, int be_resp)
//0: Timeout
{
int finish0;
if(!be_resp) // No response
{
finish0=SDICSTA;
while((finish0&0x800)!=0x800) // Check cmd end
finish0=SDICSTA;
SDICSTA=finish0;// Clear cmd end state
return 1;
}
else // With response
{
finish0=SDICSTA;
while( !( ((finish0&0x200)==0x200) | ((finish0&0x400)==0x400) )) // Check cmd/rsp end
finish0=SDICSTA;
if(cmd==1 | cmd==41) // CRC no check, CMD9 is a long Resp. command.
{
if( (finish0&0xf00) != 0xa00 ) // Check error
{
SDICSTA=finish0; // Clear error state
if(((finish0&0x400)==0x400))
return 0; // Timeout error
}
SDICSTA=finish0; // Clear cmd & rsp end state
}
else // CRC check
{
if( (finish0&0x1f00) != 0xa00 ) // Check error
{
//Uart_Printf("CMD%d:SDICSTA=0x%x, SDIRSP0=0x%x\n",cmd, SDICSTA, SDIRSP0);
SDICSTA=finish0; // Clear error state
if(((finish0&0x400)==0x400))
return 0; // Timeout error
}
SDICSTA=finish0;
}
return 1;
}
}
int Chk_DATend(void)
{
int finish;
finish=SDIDSTA;
while( !( ((finish&0x10)==0x10) | ((finish&0x20)==0x20) ))
// Chek timeout or data end
finish=SDIDSTA;
if( (finish&0xfc) != 0x10 )
{
//Uart_Printf("DATA:finish=0x%x\n", finish);
SDIDSTA=0xec; // Clear error state
return 0;
}
return 1;
}
int Chk_BUSYend(void)
{
int finish;
finish=SDIDSTA;
while( !( ((finish&0x08)==0x08) | ((finish&0x20)==0x20) ))
finish=SDIDSTA;
if( (finish&0xfc) != 0x08 )
{
//Uart_Printf("DATA:finish=0x%x\n", finish);
SDIDSTA=0xf4; //clear error state
return 0;
}
return 1;
}
void CMD0(void)
{
//-- Make card idle state
SDICARG=0x0; // CMD0(stuff bit)
SDICCON=(1<<8)|(MAGIC_NUMBER | 0); // No_resp, start, CMD0
//-- Check end of CMD0
Chk_CMDend(0, 0);
SDICSTA=0x800; // Clear cmd_end(no rsp)
}
int Chk_SD_OCR(void)
{
int i;
//-- Negotiate operating condition for SD, it makes card ready state
for(i=0;i<50;i++) //If this time is short, init. can be fail.
{
CMD55(); // Make ACMD
SDICARG=0xff8000; //ACMD41(SD OCR:2.7V~3.6V)
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 41);//sht_resp, wait_resp, start, ACMD41
//-- Check end of ACMD41
if( Chk_CMDend(41, 1) & SDIRSP0==0x80ff8000 )
{
SDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1; // Success
}
Delay(20000); // Wait Card power up status 1Sec
//Delay(200); // Wait Card power up status
}
Uart_Printf("SDIRSP0=0x%x\n",SDIRSP0);
SDICSTA=0xa00; // Clear cmd_end(with rsp)
return 0; // Fail
}
int CMD55(void)
{
//--Make ACMD
SDICARG=RCA<<16; //CMD7(RCA,stuff bit)
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 55); //sht_resp, wait_resp, start, CMD55
//-- Check end of CMD55
if(!Chk_CMDend(55, 1))
return 0;
SDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1;
}
int CMD13(void)//SEND_STATUS
{
int response0;
SDICARG=RCA<<16; // CMD13(RCA,stuff bit)
SDICCON=(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 13); // sht_resp, wait_resp, start, CMD13
//-- Check end of CMD13
if(!Chk_CMDend(13, 1))
return 0;
Uart_Printf("SDIRSP0=0x%x\n", SDIRSP0);
if(SDIRSP0&0x100)
Uart_Printf("Ready for Data\n");
//else
Uart_Printf("Not Ready\n");
response0=SDIRSP0;
response0 &= 0x3c00;
response0 = response0 >> 9;
Uart_Printf("Current Status=%d\n", response0);
if(response0==6)
Test_SDI();
SDICSTA=0xa00; // Clear cmd_end(with rsp)
return 1;
}
int CMD9(void)//SEND_CSD
{
SDICARG=RCA<<16; // CMD9(RCA,stuff bit)
SDICCON=(0x1<<10)|(0x1<<9)|(0x1<<8)|(MAGIC_NUMBER | 9); // long_resp, wait_resp, start, CMD9
//Uart_Printf("\nCSD register :\n");
//-- Check end of CMD9
if(!Chk_CMDend(9, 1))
return 0;
//Uart_Printf("SDIRSP0=0x%x\nSDIRSP1=0x%x\nSDIRSP2=0x%x\nSDIRSP3=0x%x\n", SDIRSP0,rSDIRSP1,rSDIRSP2,rSDIRSP3);
return 1;
}
void Set_4bit_bus(void)
{
Wide=1;
SetBus();
Uart_Printf("\n****4bit bus****\n");
}
void SetBus(void)
{
do
{
CMD55(); // Make ACMD
//-- CMD6 implement
SDICARG = Wide << 1; //Wide 0: 1bit, 1: 4bit
SDICCON = (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 6); //sht_resp, wait_resp, start, CMD55
if (!Chk_CMDend(6, 1)) // ACMD6
continue;
SDICSTA = 0xa00; // Clear cmd_end(with rsp)
} while (0);
}
void Set_Prt(void)
{
//-- Set protection addr.0 ~ 262144(32*16*512)
//Uart_Printf("[Set protection(addr.0 ~ 262144) test]\n");
do
{
//--Make ACMD
SDICARG = 0; // CMD28(addr)
SDICCON = (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 28); //sht_resp, wait_resp, start, CMD28
//-- Check end of CMD28
if (!Chk_CMDend(28, 1))
continue;
SDICSTA = 0xa00; // Clear cmd_end(with rsp)
} while (0);
}
void Clr_Prt(void)
{
//-- Clear protection addr.0 ~ 262144(32*16*512)
Uart_Printf("[Clear protection(addr.0 ~ 262144) test]\n");
do
{
//--Make ACMD
SDICARG = 0; // CMD29(addr)
SDICCON = (0x1 << 9) | (0x1 << 8) | (MAGIC_NUMBER | 29); //sht_resp, wait_resp, start, CMD29
//-- Check end of CMD29
if (!Chk_CMDend(29, 1))
continue;
SDICSTA = 0xa00; // Clear cmd_end(with rsp)
} while (0);
}
总结：调试和运行还是用很在的差别的，eclipse调试没有问题的，运行就会有点小问题，eclipse可以确定程序的框架，运行可以细节地显示问题，那个延时Delay(200)没有问题，到运行时候调整为Delay(2000)才可以正常。jlink的速率什么的都会影响，并不能代码整个实时的运行效果。在线调试和下载运行调试相接合才是王道。
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