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recipes/rc2014/sdcard: use "sdci" and blockdev rather than user prog
This commit is contained in:
Virgil Dupras
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2c80924df9
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@ -5,7 +5,8 @@
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;
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; Note that SPI can't really be used directly from the z80, so this part
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; assumes that you have a device that handles SPI communication on behalf of
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; the z80. This device is assumed to work in a particular way.
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; the z80. This device is assumed to work in a particular way. See the
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; "rc2014/sdcard" recipe for details.
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;
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; That device has 3 ports. One write-only port to make CS high, one to make CS
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; low (data sent is irrelevant), and one read/write port to send and receive
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@ -305,8 +306,7 @@ sdcReadBlk:
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sdcInitializeCmd:
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.db "sdci", 0, 0, 0
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call sdcInitialize
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call sdcSetBlkSize
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ret
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jp sdcSetBlkSize ; return
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; *** blkdev routines ***
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1
recipes/.gitignore
vendored
1
recipes/.gitignore
vendored
@ -1 +1,2 @@
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*.bin
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*.cfs
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@ -1,9 +1,16 @@
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TARGETS = os.bin sdinit.bin
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ZASM = ../../../tools/emul/zasm/zasm
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TARGETS = os.bin
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TOOLS = ../../../tools
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ZASM = $(TOOLS)/emul/zasm/zasm
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CFSPACK = $(TOOLS)/cfspack/cfspack
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.PHONY: all
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all: $(TARGETS)
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all: $(TARGETS) sdcard.cfs
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os.bin: glue.asm
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sdinit.bin: sdinit.asm
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$(TARGETS):
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$(ZASM) < $< > $@
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$(CFSPACK):
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make -C $(TOOLS)/cfspack
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sdcard.cfs: cfsin $(CFSPACK)
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$(CFSPACK) $< > $@
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@ -81,26 +81,22 @@ should have [glue code that looks like this](glue.asm).
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Initially, when you don't know if things work well yet, you should comment out
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the block creation part.
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## Testing CD card initialization
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This receipes contains a little [user program](sdinit.asm) that initializes a
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SD card, reads the first 12 bytes from its first sector and prints it.
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## Reading from the SD card
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The first thing we'll do is fill the SD card's first 12 bytes with "Hello
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World!":
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echo "Hello World!" > /dev/sdX
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Then, you can run `make` from within this folder to compile `sdinit.bin` and
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then [upload and run][run-from-mem] that code from memory. You might need to
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call the routine more than once (On my local tests, I need to call it twice).
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Then, insert your SD card in your SPI relay and boot the RC2014.
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If all goes well, you should see your "Hello World!" printed to the console!
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Run the `sdci` command which will initialize the card. Then, run `bsel 1` to
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select the second blockdev, which is configured to be the sd card.
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## Create a block device from the SD card reader
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TODO
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Set your memory pointer to somewhere you can write to with `mptr 9000` and then
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you're ready to load your contents with `load d` (load the 13 bytes that you
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wrote to your sd card earlier. You can then `peek d` and see that your
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"Hello World!\n" got loaded in memory!
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[schematic]: spirelay/spirelay.pdf
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[inspiration]: https://www.ecstaticlyrics.com/electronics/SPI/fast_z80_interface.html
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[run-from-mem]: ../../../doc/load-run-code.md
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1
recipes/rc2014/sdcard/cfsin/hello.txt
Normal file
1
recipes/rc2014/sdcard/cfsin/hello.txt
Normal file
@ -0,0 +1 @@
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Hello World!
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@ -41,14 +41,14 @@ jp aciaInt
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#include "stdio.asm"
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.equ SHELL_RAMSTART STDIO_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 3
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.equ SHELL_EXTRA_CMD_COUNT 4
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#include "shell.asm"
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.dw sdcInitializeCmd, blkBselCmd, blkSeekCmd
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.dw sdcInitializeCmd, blkBselCmd, blkSeekCmd, sdcInitializeCmd
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.equ SDC_RAMSTART SHELL_RAMEND
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.equ SDC_PORT_CSHIGH 6
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.equ SDC_PORT_CSLOW 5
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.equ SDC_PORT_SPI 4
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.equ SDC_RAMSTART SHELL_RAMEND
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.equ SDC_PORT_CSHIGH 6
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.equ SDC_PORT_CSLOW 5
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.equ SDC_PORT_SPI 4
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#include "sdc.asm"
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init:
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@ -1,52 +0,0 @@
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.equ JUMP_PRINTSTR 0x03
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.equ JUMP_PRINTHEX 0x06
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.equ JUMP_SDCINITALIZE 0x09
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.equ JUMP_SDCSENDRECV 0x0c
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.equ JUMP_SDCWAITRESP 0x0f
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.equ JUMP_SDCCMD 0x12
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.equ JUMP_SDCCMDR1 0x15
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.equ JUMP_SDCCMDR7 0x18
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.equ JUMP_SDCREAD 0x1b
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.equ JUMP_SDCSETBLKSIZE 0x1e
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.org 0x9000
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call JUMP_SDCINITALIZE
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or a
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jp nz, error
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ld hl, sOk
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call JUMP_PRINTSTR
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call JUMP_SDCSETBLKSIZE
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or a
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jp nz, error
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ld hl, sOk
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call JUMP_PRINTSTR
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; read sector 0
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xor a
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call JUMP_SDCREAD
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or a
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jp nz, error
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push hl
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ld hl, sOk
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call JUMP_PRINTSTR
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pop hl
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; SDC buffer address is in HL
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; YOLO! print it!
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call JUMP_PRINTSTR
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ret
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error:
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call JUMP_PRINTHEX
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ld hl, sErr
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call JUMP_PRINTSTR
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ret
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sOk:
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.db "Ok", 0xa, 0xd, 0
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sErr:
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.db "Err", 0xa, 0xd, 0
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