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Change test program to use correct args

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Seems to work, when you run the test program it resets the card and
sends the voltage and test pattern, and it does receive a response from
the card.
This commit is contained in:
Byron Lathi
2023-01-12 21:45:13 -06:00
parent 98c07b59b4
commit 7682dffe3c
5 changed files with 172 additions and 156 deletions
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52
hw/efinix_fpga/test_programs/sdcard.s
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@@ -2,8 +2,6 @@
.export _sd_card_command
.export _sd_card_resp
.export _sd_card_read_byte
.export _sd_card_wait_for_data
.autoimport on
@@ -24,6 +22,11 @@ main:
jsr _sd_card_command
nop ; no resp, so need to wait for cmd to finish
lda #$18
@delay: dec
bne @delay
@cmd8:
lda #$aa
sta tmp1
@@ -50,28 +53,36 @@ stztmp:
rts
; Send sd card command.
; command is in A register, the args are on the stack
; I think the order is high byte first?
; command is in A register, the args are in tmp1-4 le
_sd_card_command:
pha
jsr popeax
pha ; store cmd
lda tmp1 ; write args
sta SD_ARG
stx SD_ARG+1
lda sreg
lda tmp2
sta SD_ARG+1
lda tmp3
sta SD_ARG+2
lda sreg+1
lda tmp4
sta SD_ARG+3
pla
pla ; write cmd
sta SD_CMD
rts
; void sd_card_resp(uint32_t* resp);
_sd_card_resp:
phy
sta ptr1 ; store pointer
stx ptr1+1
lda #$0
ldy #$0
sta (ptr1),y
iny
sta (ptr1),y
iny
sta (ptr1),y
iny
sta (ptr1),y
@1: lda SD_CMD ; wait for status flag
and #$01
beq @1
@@ -90,20 +101,7 @@ _sd_card_resp:
ply
rts
_sd_card_read_byte:
lda SD_DATA
ldx #$00
rts
_sd_card_wait_for_data:
pha
@1: lda SD_CMD ; wait for status flag
and #$02
beq @1
pla
rts
; int sd_card_resp_timeout(uint32_t* resp);
_sd_card_resp_timeout:
phy
@@ -118,7 +116,7 @@ _sd_card_resp_timeout:
sta (ptr1),y
iny
sta (ptr1),y
ldy #$9
ldy #$12
@1: dey
beq @timeout
lda SD_CMD ; wait for status flag