2019-05-08 05:26:52 +10:00
|
|
|
#include "jumptable.inc"
|
|
|
|
|
.org 0x9000
|
|
|
|
|
|
|
|
|
|
call JUMP_SDCWAKEUP
|
|
|
|
|
|
2019-05-08 06:20:28 +10:00
|
|
|
; We expect a 0x01 R1 response
|
2019-05-08 07:28:07 +10:00
|
|
|
ld hl, sCmd
|
2019-05-08 06:20:28 +10:00
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 05:26:52 +10:00
|
|
|
ld a, 0b01000000 ; CMD0
|
|
|
|
|
ld hl, 0
|
|
|
|
|
ld de, 0
|
|
|
|
|
ld c, 0x95
|
|
|
|
|
call JUMP_SDCCMDR1
|
2019-05-08 06:20:28 +10:00
|
|
|
cp 0x01
|
2019-05-08 07:28:07 +10:00
|
|
|
jp nz, .error
|
2019-05-08 06:20:28 +10:00
|
|
|
ld hl, sOk
|
|
|
|
|
call JUMP_PRINTSTR
|
|
|
|
|
|
|
|
|
|
; We expect a 0x01 R1 response followed by 0x0001aa R7 response
|
2019-05-08 07:28:07 +10:00
|
|
|
ld hl, sCmd
|
2019-05-08 06:20:28 +10:00
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 05:26:52 +10:00
|
|
|
ld a, 0b01001000 ; CMD8
|
|
|
|
|
ld hl, 0
|
|
|
|
|
ld de, 0x01aa
|
|
|
|
|
ld c, 0x87
|
|
|
|
|
call JUMP_SDCCMDR7
|
2019-05-08 06:20:28 +10:00
|
|
|
ld a, d
|
|
|
|
|
cp 0x01
|
2019-05-08 07:28:07 +10:00
|
|
|
jp nz, .error
|
2019-05-08 06:20:28 +10:00
|
|
|
ld a, e
|
|
|
|
|
cp 0xaa
|
|
|
|
|
jr nz, .error
|
|
|
|
|
ld hl, sOk
|
|
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 06:38:08 +10:00
|
|
|
|
|
|
|
|
; Now we need to repeatedly run CMD55+CMD41 (0x40000000) until we
|
|
|
|
|
; the card goes out of idle mode, that is, when it stops sending us
|
|
|
|
|
; 0x01 response and send us 0x00 instead. Any other response means that
|
|
|
|
|
; initialization failed.
|
2019-05-08 07:28:07 +10:00
|
|
|
ld hl, sCmd
|
2019-05-08 06:38:08 +10:00
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 07:28:07 +10:00
|
|
|
.loop1:
|
2019-05-08 06:38:08 +10:00
|
|
|
ld a, 0b01110111 ; CMD55
|
|
|
|
|
ld hl, 0
|
|
|
|
|
ld de, 0
|
|
|
|
|
call JUMP_SDCCMDR1
|
|
|
|
|
cp 0x01
|
|
|
|
|
jr nz, .error
|
|
|
|
|
ld a, 0b01101001 ; CMD41 (0x40000000)
|
|
|
|
|
ld hl, 0x4000
|
|
|
|
|
ld de, 0x0000
|
|
|
|
|
call JUMP_SDCCMDR1
|
|
|
|
|
cp 0x01
|
2019-05-08 07:28:07 +10:00
|
|
|
jr z, .loop1
|
2019-05-08 06:38:08 +10:00
|
|
|
cp 0
|
|
|
|
|
jr nz, .error
|
|
|
|
|
; Success! out of idle mode!
|
|
|
|
|
ld hl, sOk
|
|
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 07:28:07 +10:00
|
|
|
|
|
|
|
|
; Alright, normally we should configure block size and all, but this is
|
|
|
|
|
; too exciting and we'll play it dirty: we'll read just enough bytes
|
|
|
|
|
; to fetch our "Hello World!" and print it and we'll leave the SD card
|
|
|
|
|
; hanging. Yeah, I know, not very polite.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
out (5), a
|
|
|
|
|
ld hl, sCmd
|
|
|
|
|
call JUMP_PRINTSTR
|
|
|
|
|
ld a, 0b01010001 ; CMD17
|
|
|
|
|
ld hl, 0 ; read single block at addr 0
|
|
|
|
|
ld de, 0
|
|
|
|
|
call JUMP_SDCCMD
|
|
|
|
|
cp 0
|
|
|
|
|
jr nz, .error
|
|
|
|
|
|
|
|
|
|
ld hl, sCmd
|
|
|
|
|
call JUMP_PRINTSTR
|
|
|
|
|
; Command sent, no error, now let's wait for our data response.
|
|
|
|
|
ld b, 20
|
|
|
|
|
.loop3:
|
|
|
|
|
call JUMP_SDCWAITRESP
|
|
|
|
|
; 0xfe is the expected data token for CMD17
|
|
|
|
|
cp 0xfe
|
|
|
|
|
jr z, .loop3end
|
|
|
|
|
cp 0xff
|
|
|
|
|
jr nz, .error
|
|
|
|
|
djnz .loop3
|
|
|
|
|
jr .error
|
|
|
|
|
|
|
|
|
|
.loop3end:
|
|
|
|
|
ld hl, sGettingData
|
|
|
|
|
call JUMP_PRINTSTR
|
|
|
|
|
; Data packets follow immediately
|
|
|
|
|
ld b, 12 ; size of "Hello World!"
|
|
|
|
|
ld hl, sDest ; sDest has null chars, we'll be alright
|
|
|
|
|
; printing it.
|
|
|
|
|
.loop2:
|
|
|
|
|
call JUMP_SDCWAITRESP
|
|
|
|
|
ld (hl), a
|
|
|
|
|
inc hl
|
|
|
|
|
djnz .loop2
|
|
|
|
|
out (6), a
|
|
|
|
|
ld hl, sDest
|
|
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 06:20:28 +10:00
|
|
|
ret
|
|
|
|
|
.error:
|
2019-05-08 07:28:07 +10:00
|
|
|
call JUMP_PRINTHEX
|
2019-05-08 06:20:28 +10:00
|
|
|
ld hl, sErr
|
|
|
|
|
call JUMP_PRINTSTR
|
2019-05-08 05:26:52 +10:00
|
|
|
ret
|
2019-05-08 06:20:28 +10:00
|
|
|
|
2019-05-08 07:28:07 +10:00
|
|
|
sCmd:
|
|
|
|
|
.db "CMD", 0xa, 0xd, 0
|
|
|
|
|
sGettingData:
|
|
|
|
|
.db "Data", 0xa, 0xd, 0
|
2019-05-08 06:20:28 +10:00
|
|
|
sOk:
|
|
|
|
|
.db "Ok", 0xa, 0xd, 0
|
|
|
|
|
sErr:
|
|
|
|
|
.db "Err", 0xa, 0xd, 0
|
2019-05-08 07:28:07 +10:00
|
|
|
|
|
|
|
|
sDest:
|
|
|
|
|
.fill 0x10
|
