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|
.TEXT
@--------------------------------sd data--------------------------------
.equ sd_comadd,0x9800000
.equ sd_dataadd,0x9000000
.equ sd_dataradd,0x9100000
@-----------------viod sd_data_write_s(u16 *buff,u16* crc16buff)-------------------
.ALIGN
.GLOBAL sd_data_write_s
.CODE 32
sd_data_write_s:
stmfd r13!,{r4-r5}
mov r5,#512
mov r2,#sd_dataadd
sd_data_write_busy:
ldrh r3,[r2]
tst r3,#0x100
beq sd_data_write_busy
ldrh r3,[r2]
mov r3,#0 @star bit
strh r3,[r2]
sd_data_write_loop:
ldrh r3,[r0],#2
add r3,r3,r3,lsl #20
mov r4,r3,lsl #8
stmia r2,{r3-r4}
subs r5, r5, #2
bne sd_data_write_loop
cmp r1,#0
movne r0,r1
movne r1,#0
movne r5,#8
bne sd_data_write_loop
mov r3,#0xff @end bit
strh r3,[r2]
sd_data_write_loop2:
ldrh r3,[r2]
tst r3,#0x100
bne sd_data_write_loop2
ldmia r2,{r3-r4}
ldmfd r13!,{r4-r5}
bx r14
@-----------------end sd_data_write_s-------------------
@----------void sd_data_read_s(u16 *buff)-------------
.ALIGN
.GLOBAL sd_data_read_s
.CODE 32
sd_data_read_s:
stmfd r13!,{r4}
mov r1,#sd_dataradd
sd_data_read_loop1:
ldrh r3,[r1] @star bit
tst r3,#0x100
bne sd_data_read_loop1
mov r2,#512
sd_data_read_loop:
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
ldmia r1,{r3-r4}
mov r3,r4,lsr #16
strh r3 ,[r0],#2
subs r2, r2, #16
bne sd_data_read_loop
ldmia r1,{r3-r4} @crc 16
ldmia r1,{r3-r4}
ldmia r1,{r3-r4}
ldmia r1,{r3-r4}
ldrh r3,[r1] @end bit
ldmfd r13!,{r4}
bx r14
@----------end sd_data_read_s-------------
@------void sd_com_crc16_s(u16* buff,u16 num,u16* crc16buff)
.ALIGN
.GLOBAL sd_crc16_s
.CODE 32
sd_crc16_s:
stmfd r13!,{r4-r9}
mov r9,r2
mov r3,#0
mov r4,#0
mov r5,#0
mov r6,#0
ldr r7,=0x80808080
ldr r8,=0x1021
mov r1,r1,lsl #3
sd_crc16_loop:
tst r7,#0x80
ldrneb r2,[r0],#1
mov r3,r3,lsl #1
tst r3,#0x10000
eorne r3,r3,r8
tst r2,r7,lsr #24
eorne r3,r3,r8
mov r4,r4,lsl #1
tst r4,#0x10000
eorne r4,r4,r8
tst r2,r7,lsr #25
eorne r4,r4,r8
mov r5,r5,lsl #1
tst r5,#0x10000
eorne r5,r5,r8
tst r2,r7,lsr #26
eorne r5,r5,r8
mov r6,r6,lsl #1
tst r6,#0x10000
eorne r6,r6,r8
tst r2,r7,lsr #27
eorne r6,r6,r8
mov r7,r7,ror #4
subs r1,r1,#4
bne sd_crc16_loop
mov r2,r9
mov r8,#16
sd_crc16_write_data:
mov r7,r7,lsl #4
tst r3,#0x8000
orrne r7,r7,#8
tst r4,#0x8000
orrne r7,r7,#4
tst r5,#0x8000
orrne r7,r7,#2
tst r6,#0x8000
orrne r7,r7,#1
mov r3,r3,lsl #1
mov r4,r4,lsl #1
mov r5,r5,lsl #1
mov r6,r6,lsl #1
sub r8,r8,#1
tst r8,#1
streqb r7,[r2],#1
cmp r8,#0
bne sd_crc16_write_data
ldmfd r13!,{r4-r9}
bx r14
@------end sd_com_crc16_s-----------------------------------
@--------------u8 sd_crc7_s(u16* buff,u16 num)----------------------------
.ALIGN
.GLOBAL sd_crc7_s
.CODE 32
sd_crc7_s:
stmfd r13!,{r4}
mov r3,#0
ldr r4,=0x80808080
mov r1,r1,lsl #3 @ *8
sd_crc7_loop:
tst r4,#0x80
ldrneb r2,[r0],#1
mov r3,r3,lsl #1
tst r3,#0x80
eorne r3,r3,#0x9
tst r2,r4,lsr #24
eorne r3,r3,#0x9
mov r4,r4,ror #1
subs r1,r1,#1
bne sd_crc7_loop
mov r3,r3,lsl #1
add r0,r3,#1
ldmfd r13!,{r4}
bx r14
@--------------end sd_crc7_s----------------------------
@--------------sd_com_read_s(u16* buff,u32 num)------------------
.ALIGN
.GLOBAL sd_com_read_s
.CODE 32
sd_com_read_s:
stmfd r13!,{r4-r6}
mov r2,#sd_comadd
sd_com_read_loop1:
ldrh r3,[r2] @star bit
tst r3,#1
bne sd_com_read_loop1
sd_com_read_loop:
ldmia r2,{r3-r6}
subs r1, r1, #1
bne sd_com_read_loop
ldmfd r13!,{r4-r6}
bx r14
@--------------end sd_com_read_s------------------
@-------------------void sd_com_write_s(u16* buff,u32 num)-----------------
.ALIGN
.GLOBAL sd_com_write_s
.CODE 32
sd_com_write_s:
stmfd r13!,{r4-r6}
mov r2,#sd_comadd
sd_com_write_busy:
ldrh r3,[r2]
tst r3,#0x1
beq sd_com_write_busy
ldrh r3,[r2]
sd_com_write_loop:
ldrb r3,[r0],#1
add r3,r3,r3,lsl #17
mov r4,r3,lsl #2
mov r5,r4,lsl #2
mov r6,r5,lsl #2
stmia r2,{r3-r6}
subs r1, r1, #1
bne sd_com_write_loop
ldmfd r13!,{r4-r6}
bx r14
@-------------------end sd_com_write_s-----------------
@-----------------void send_clk(u32 num)---------
.ALIGN
.GLOBAL send_clk
.CODE 32
send_clk:
mov r1,#sd_comadd
send_clk_loop1:
ldrh r3,[r1]
subs r0,r0,#1
bne send_clk_loop1
bx r14
@-----------------end send_clk---------
@---------------------------void SDCommand(u8 command,u8 num,u32 sector)--------------------
.ALIGN
.GLOBAL SDCommand
.CODE 32
@void SDCommand(u8 command,u8 num,u32 sector )
@{
@ u8 databuff[6];
@ register u8 *char1;
@ register u8 *char2;
@
@ char1=(u8*)(((u32)§or)+3);
@ char2=(u8*)databuff;
@ *char2++=coma+0x40;
@ *char2++=*char1--;
@ *char2++=*char1--;
@ *char2++=*char1--;
@ *char2++=*char1;
@ *char2=sd_crc7_s((u32)databuff,5);
@
@ sd_com_write_s((u32)databuff,6);
@
@}
SDCommand:
stmfd r13!,{r14}
sub r13,r13,#16
add r0,r0,#0x40
strb r0,[r13,#4]
mov r1,r2,lsr #24
strb r1,[r13,#5]
mov r1,r2,lsr #16
strb r1,[r13,#6]
mov r1,r2,lsr #8
strb r1,[r13,#7]
strb r2,[r13,#8]
add r0,r13,#4
mov r1,#5
bl sd_crc7_s
strb r0,[r13,#9]
add r0,r13,#4
mov r1,#6
bl sd_com_write_s
add r13,r13,#16
ldmfd r13!,{r15}
@ bx r14
@---------------------------end SDCommand--------------------
@----------void ReadSector(u16 *buff,u32 sector,u8 readnum)-------------
.ALIGN
.GLOBAL ReadSector @ r0:Srcp r1:num ok
.CODE 32
@void ReadSector(u16 *buff,u32 sector,u8 readnum)
@{
@ register u16 i,j;
@ i=readnum;
@ sectno<<=9;
@ SDCommand(18,0,sector);
@ for (j=0;j<i ; j++)
@ {
@ sd_data_read_s((u32)buff+j*512);
@ }
@ SDCommand(12,0,0);
@ get_resp();
@ send_clk(0x10);
@
@}
ReadSector:
stmfd r13!,{r4-r6,r14}
mov r4,r0
mov r5,r2
mov r2,r1,lsl #9
mov r0,#18
mov r1,#0
bl SDCommand
mov r6,#0
beginforj_ReadSector:
cmp r6,r5
bge endforj_ReadSector
mov r0,r4
add r0,r0,r6,lsl #9
bl sd_data_read_s
add r6,r6,#1
b beginforj_ReadSector
endforj_ReadSector:
mov r0,#12
mov r1,#0
mov r2,#0
bl SDCommand
bl get_resp
mov r0,#0x10
bl send_clk
mov r0,#1
ldmfd r13!,{r4-r6,r15}
@ bx r14
@----------end ReadSector------------
@-----------void get_resp(void)-------------------
.ALIGN
.GLOBAL get_resp @ r0:Srcp r1:num ok
.CODE 32
get_resp:
stmfd r13!,{r14}
mov r1,#6
bl sd_com_read_s
ldmfd r13!,{r15}
@-----------end get_resp-------------------
@---------------void WriteSector(u16 *buff,u32 sector,u8 writenum)---------------------
.ALIGN
.GLOBAL WriteSector @ r0:Srcp r1:num ok
.CODE 32
@void WriteSector(u16 *buff,u32 sector,u8 writenum)
@{
@ register u16 i,j;
@ u16 crc16[5];
@ i=writenum;
@
@ sectno<<=9;
@
@ SDCommand(25,0,sector);
@ get_resp();
@ send_clk(0x10);
@
@ for (j=0;j<i ; j++)
@ {
@ sd_crc16_s((u32)(u32)buff+j*512,512,(u32)crc16);
@ sd_data_write_s((u32)buff+j*512,(u32)crc16);
@ send_clk(0x10);
@ }
@ SDCommand(12,0,0);
@ get_resp();
@ send_clk(0x10);
@ while((*(u16*)sd_dataadd &0x0100)==0);
@
@}
@
WriteSector:
stmfd r13!,{r4-r6,r14}
sub r13,r13,#20
mov r4,r0
mov r5,r2
mov r2,r1,lsl #9
mov r0,#25
mov r1,#0
bl SDCommand
bl get_resp
mov r0,#0x10
bl send_clk
mov r6,#0
beginforj_WriteSector:
cmp r6,r5
bge endforj_WriteSector
mov r0,r4
add r0,r0,r6,lsl #9
mov r1,#512
add r2,r13,#4
bl sd_crc16_s
mov r0,r4
add r0,r0,r6,lsl #9
add r1,r13,#4
bl sd_data_write_s
mov r0,#0x10
bl send_clk
add r6,r6,#1
b beginforj_WriteSector
endforj_WriteSector:
mov r0,#12
mov r1,#0
mov r2,#0
bl SDCommand
bl get_resp
mov r0,#0x10
bl send_clk
ldr r0,=sd_dataadd
beginwhile_WriteSector:
ldrh r1,[r0]
tst r1,#0x0100
beq beginwhile_WriteSector
mov r0,#1
add r13,r13,#20
ldmfd r13!,{r4-r6,r15}
@---------------end WriteSector--------------------
@----------------void InitSCMode(void)---------------
.ALIGN
.GLOBAL InitSCMode
.CODE 32
InitSCMode:
mvn r0,#0x0F6000000
sub r0,r0,#0x01
mov r1,#0x0A500
add r1,r1,#0x5A
strh r1,[r0]
strh r1,[r0]
mov r2,#3
strh r2,[r0]
strh r2,[r0]
bx r14
@----------------end InitSCMode ---------------
@----------------bool MemoryCard_IsInserted(void)---------------
.ALIGN
.GLOBAL MemoryCard_IsInserted
.CODE 32
MemoryCard_IsInserted:
ldr r0,=sd_comadd
ldrh r1,[r0]
tst r1,#0x300
moveq r0,#1
movne r0,#0
bx r14
@----------------end MemoryCard_IsInserted---------------
.END
|
