EverDrive-64 v3: Difference between revisions
add some registers' descriptions
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(add some registers' descriptions) |
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Line 31:
| 0x08040008 || REG_DMA_LEN || W || SD/USB DMA length in 512bytes blocks - 1 (ex. 0 = 0x200 bytes)
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| 0x0804000C ||
|-
| 0x08040010 || REG_MSG || ? || ?
Line 57:
| 0x0804003C || ? || ? || ?
|-
| 0x08040040 ||
|-
| 0x08040044 ||
|-
| 0x08040048 || MAX_MSG || R/W || Some configurations
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=== 0x08040000 (REG_CFG) ===
Read/Write
{| class="wikitable"
Line 93:
|}
=== 0x08040004 (REG_STATUS) ===
Read only
{| class="wikitable"
!bit from lsb
!description
|-
|15
|1=SDRAM enabled?
|-
|4
|SPI?
|-
|3
|RXF# on USB FIFO (0=some data from Host exists)
|-
|2
|TXE# on USB (0=able to send some data to Host)
|-
|1
|DMATOUT (1=last DMA was timed out, i.e. last transfer is less than 512bytes)
|-
|0
|DMABUSY (1=DMA is ongoing)
|}
=== 0x08040008 (REG_DMA_LEN) ===
Write only
Next SD/USB DMA transfers (this + 1) * 512 bytes.
ex. 0 = 0x200 bytes, 1 = 0x400 bytes, 2 = 0x600 bytes.
=== 0x0804000C (REG_DMA_RAM_ADDR) ===
Write only
Next SD/DMA DMA transfers from this * 2048 bytes.
ex. 0 = 0x00000000, 1 = 0x00000800, 2 = 0x00001000.
This is ED64 ROM address space, ex. 0xB0000000 on CPU = 0x10000000 on PI = 0x00000000 on ED64 ROM.
=== 0x08040010 (REG_MSG) ===
TBA
=== 0x08040014 (REG_DMA_CFG) ===
Write only
{| class="wikitable"
!value
!description
|-
|1
|SD -> Cart
|-
|2
|Cart -> SD
|-
|3
|USB -> Cart
|-
|4
|Cart -> USB
|}
Note that above table numbers are value, not "bit from lsb".
You must set REG_DMA_LEN and REG_DMA_RAM_ADDR before writing this register.
=== 0x08040018 (REG_SPI) ===
Read/Write
{| class="wikitable"
!bit from lsb
!description
|-
|7-0
|dat/cmd value. Bits are shifted in from lsb if 1bit mode.
|}
Writing value to this invokes clock CLK on SD card.
You should also write this to read. (write value is ignored)
=== 0x0804001C (REG_SPI_CFG) ===
Write only
{| class="wikitable"
!bit from lsb
!description
|-
|5
|Bits transferred on writing REG_SPI: 0=8bits 1=1bit
|-
|4
|Which line to R/W: 0=CMD 1=DAT
|-
|3
|Read or write: 0=write 1=read
|-
|2
|Slave Select line on SD card
|-
|1-0
|CLK speed: 10=init 01=25MHz 00=50MHz
|}
=== 0x08040020 (REG_KEY) ===
Write only
TBA
=== 0x08040024 (REG_SAV_CFG) ===
Write only
TBA
=== 0x08040028 (REG_SEC) ===
TBA
=== 0x0804002C (REG_VER) ===
Read only
TBA
=== 0x08040030 (I2C/RTC) ===
Read/Write
TBA
=== 0x08040040 (REG_CFG_CNT) ===
TBA
=== 0x08040044 (REG_CFG_DAT) ===
TBA
=== 0x08040048 (REG_MAX_MSG) ===
Read/Write
TBA
=== 0x0804004C (REG_CRC) ===
TBA
== USB Serial Communication ==
=== Common Code ===
Before communication, you must enable ED64 registers.
TBA
=== Sending Data to the Host ===
You should transfer data from RDRAM to some area on cart "ROM" area first, then use Cart->USB DMA on ED64.
TBA
=== Reading Data from the Host ===
You should use USB->Cart DMA on ED64 first, then transfer data from cart ROM area to RDRAM.
TBA
[[Category:Flash Carts]]
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