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Successful Reply Format
| Byte 0 | Value 14, indicating Rewrite NAND subcommand |
| Bytes 1 4 | 32-bit start page number |
| Bytes 5 8 | 32-bit final page number |
Syntax Failed Reply Format
| Byte 0 | Value 14, indicating Rewrite NAND subcommand |
| Bytes 1 4 | 32-bit start page number |
| Bytes 5 8 | 32-bit final page number |
Operation Failed Reply Format
| Byte 0 | Value 13, indicating NAND Read Disturbance Test subcommand |
| Bytes 1 4 | 32-bit start page number |
| Bytes 5 8 | 32-bit final page number |
| Bytes 9 12 | 32-bit page number of fault |
READ FILE (0x07)
The Read File command returns four consecutive bytes of EDAC protected memory from the supervisor processor. The read process is atomic, so that consistent data is always returned. This command is intended for back-compatibility with other NSP devices with 32-bit floating-point file systems. There are two command formats available: short and long. These return corresponding short and long replies. These can be distinguished by their lengths.
Short Command Format
| Byte 0 | EDAC address divided by 4 (0 255) |
Long Command Format
| Bytes 0 - 1 | EDAC address divided by 4 (0 65535) |
Short Reply Format
| Byte 0 | EDAC address divided by 4 (0 255) |
| Bytes 1 - 4 | EDAC data bytes read from memory |
Long Reply Format
| Bytes 0 1 | EDAC address divided by 4 (0 65535) |
| Bytes 2 5 | EDAC data bytes read from memory |
WRITE FILE (0x08)
The Write File command writes four consecutive bytes to EDAC memory. The write process is atomic, so that consistent data is always stored. This command is intended for back-compatibility with other NSP devices with 32-bit floating-point file systems. There are two command formats available: short and long. These return corresponding short and long replies. These can be distinguished by their lengths.
Short Command Format
| Bytes 0 | EDAC address divided by 4 (0 255) |
| Bytes 1 - 4 | Data bytes to write to EDAC memory |
Long Command Format
| Bytes 0 1 | EDAC address divided by 4 (0 65535) |
| Bytes 2 5 | Data bytes to write to EDAC memory |
Short Reply Format
| Bytes 0 | EDAC address divided by 4 (0 255) |
| Bytes 1 - 4 | Data bytes that were written to EDAC memory |
Long Reply Format
| Bytes 0 1 | EDAC address divided by 4 (0 65535) |
| Bytes 2 5 | Data bytes that were written to EDAC memory |
READ EDAC (0x09)
The Read EDAC command returns bytes from EDAC memory. The read process is atomic. Long and short command formats are available.
Short Command Format
| Bytes 0 1 | EDAC address to start reading |
| Byte 2 | Number of bytes to read. A value of 0 indicates that 256 bytes should be read. |
Long Command Format
| Bytes 0 1 | EDAC address to start reading |
| Bytes 2 - 3 | Number of bytes to read. |
Reply Format
| Bytes 0 1 | EDAC address where reading started |
| Bytes 2 N | The data bytes read from EDAC memory |
WRITE EDAC (0x0A)
The Write EDAC command writes bytes into EDAC memory. The write process is atomic.
Command Format
| Bytes 0 1 | EDAC address to start writing |
| Bytes 2 N | Data bytes to write to EDAC memory |
Reply Format
| Bytes 0 1 | EDAC address where writing started |
| Bytes 2 N | The data bytes written to EDAC memory |
GO (0x0B)
The Go Code command starts (or terminates) a star tracker sequence. The code is a bitfield, with the following contents:
| Bit 0 (LSB) | 0: Power off functional processor and detector immediately 1: Power on functional processor and detector immediately |
| Bit 1 | 0: Load functional processor software from supervisor flash 1: Load functional processor software from functional NAND flash |
| Bit 2 | 0: Power off functional processor and detector when functional processor indicates done, or after timeout 1: Do not turn off functional processor and detector when done |
| Bit 3 | 0: Do not send a command to the functional processor 1: Load the compact control structure into the functional processor |
| Bit 4 | 0: Do not execute a built-in-test 1: Execute a built-in-test. |
| Bit 5 | 0: Reboot the functional processor and then load software into it 1: Keep the functional processor running with whatever software is currently loaded. The timeout timer is reset. |
| Bits 6 7 (MSB) | Reserved for future use. Write as zero. |
If bit 1 is set the functional processor will load its bootloader from NAND flash (blocks 0, 1, 2 or 3). It will then immediately attempt to load and execute an Application Module image from block 0x8000, exactly as if it had received an INIT 0x00008000 command.
If bit 1 is clear the functional processor will load its bootloader from the supervisor flash. This will take several seconds, and when complete the star tracker will be in maintenance mode. Do not clear bit 1 when bit 3 or 4 is set.
Bit 5 is only valid when the sequence state is running or completed. If this is not the case, the bit will be considered cleared regardless of its commanded state.
If bit 2 is clear, the functional processor will be powered down after a timeout, completion, or an emergency terminate, whichever comes first.
If bit 2 is set but bit 5 is clear, the functional processor will be powered down by an emergency terminate only.
If bit 2 and bit 5 are set, the functional processor will be powered down if timeout occurs before completion. It will also be powered down by an emergency terminate. If it reaches completion before timeout it will remained powered.
Command Format
| Bytes 0 | Go code to execute |
Reply Format
| Bytes 0 | Go code that is being executed |
READ RESULT (0x0D)
The Read Result command is used to read the result structure from the supervisor memory. Short and long commands are available. If a single reply message would not be sufficient to contain the data requested then several messages will be sent back-to-back. The PF bit of the final message will be 1, and all other messages have a PF bit of 0.
Date: 2015-12-17; view: 668
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