From NaWiki
Description
This is the protocol used for SPI communication between DS and DSerial.
Tables
Standard Write Packet
| Type | Description
|
| uint8 | selector with highest order bit set
|
| uint8 | size of data (max 32) to DSerial
|
| array | data to DSerial
|
Standard Read Packet
| Type | Description
|
| uint8 | selector with highest order bit cleared
|
| uint8 | size of data (max 32) from DSerial
|
| array | data from DSerial
|
Selectors
| Selector | Define | Description
|
| 0x00 | none | reserved
|
| 0x01 | SELECT_INTERRUPT | reads or writes Interrupt Status register
|
| 0x02 | SELECT_FLASH | writes or reads to flash
|
| 0x03 | SELECT_FLASH_ERASE | erases a 512 byte page in flash
|
| 0x04 | SELECT_BOOT_FIRMWARE | boots firmware at offset 0x0800 in flash
|
| 0x05 | SELECT_BOOT_LOADER | boots bootloader at offset 0x0000 in flash
|
| 0x10 | SELECT_UART_BAUD | sets or reads UART baudrate
|
| 0x11 | SELECT_UART_BUFFER | reads or writes UART data
|
| 0x9F | SELECT_CHECK | checks whether DSerial is inserted (see Detecting DSerial)
|
Interrupt Status
