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; ****************************************************************************
; SD Card Blockwrite Test
;
; Writes one 512-byte block at the specified address. The 512-byte block
; consists of two times $00..$FF and the target address can be defined using
; two LBA constants.
;
; done by sy2002 in September 2022
; ****************************************************************************
#include "../dist_kit/sysdef.asm"
#include "../dist_kit/monitor.def"
.ORG 0x8000 ; start at 0x8000
; ; wait about 20 seconds
; MOVE 0x0900, R0
;LOOP_1 MOVE 0xFFFF, R1
;LOOP_2 SUB 1, R1
; RBRA LOOP_2, !Z
; SUB 1, R0
; RBRA LOOP_1, !Z
; Reset SD card
MOVE IO$SD_CSR, R0
MOVE SD$CMD_RESET, @R0
WAIT_RESETEND MOVE @R0, R1
AND SD$BIT_BUSY, R1
RBRA WAIT_RESETEND, !Z
; fill 512-byte internal buffer with 2x $00..$FF
MOVE IO$SD_DATA_POS, R0
MOVE IO$SD_DATA, R1
MOVE 0, @R0
FILL MOVE @R0, @R1
ADD 1, @R0
CMP 512, @R0
RBRA FILL, !Z
; Write block
MOVE IO$SD_ADDR_LO, R0
MOVE LBA_LO, @R0
MOVE IO$SD_ADDR_HI, R0
MOVE LBA_HI, @R0
MOVE IO$SD_CSR, R0
MOVE SD$CMD_WRITE, @R0
SYSCALL(exit, 1)
; Write at block at 7GB = 7.516.192.768 bytes = 0xE00000 blocks
LBA_HI .EQU 0x00E0
LBA_LO .EQU 0x0000
2541cced1This file is pinned to the selected release. Download the original to open it in your design tool.