Protocol
From NaWiki
Contents |
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Description
This is the protocol used for SPI communication between DS and DSerial.
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Tables
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Standard Write Packet
| Type | Description |
|---|---|
| uint8 | selector with highest order bit set |
| uint8 | size of data (max 32) to DSerial |
| array | data to DSerial |
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Standard Read Packet
| Type | Description |
|---|---|
| uint8 | selector with highest order bit cleared |
| uint8 | size of data (max 32) from DSerial |
| array | data from DSerial |
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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) |
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Interrupt Status
| Bit | Description |
|---|---|
| 0 | Bootloader |
| 1 | UART Sent |
| 2 | UART Received |
| 3 | I/O |
| 4 | ADC |
| 5 | PWM |
| 6 | USB |
| 7 | reserved |
