There are fifteen (15) keys, which are only interpreted to have the special meaning shown below when input as the FIRST character of a command line, that is, when there is nothing else in the serial port's input buffer. They are not displayed, but are acted upon immediately. They cannot be entered across the nRF radio link, although the SRAM addresses which contain them can be changed using an "ES" command.
| Bits in bFlags_Serial at SRAM address 0x4B: | |||||||
| Key | Key name | ASCII value | Bit | Bit Name | Purpose / Notes | ||
|---|---|---|---|---|---|---|---|
| _ | underscore | 95 or 0x5F | 0 | BIT_SER_ECHO | Echo each received BYTE back out | ||
| \ | backslash | 92 or 0x5C | 1 | BIT_SER_INHIBITBR | Prevents BIT_SER_BLOCKRD from being autoenabled | ||
| [ | left bracket | 91 or 0x5B | 2 | BIT_SER_QUIET | Suppress usual script change output | ||
| single quote | 39 or 0x27 | 3 | BIT_SER_SHOWCMD | Show the enbuffered command before processing it | |||
| ^ | up arrow | 94 or 0x5E | 4 | BIT_SER_UPARROW | For user use; no system logic uses it now | ||
| | | verical bar | 124 or 0x7C | 5 | BIT_SER_VERTBAR | For user use; no system logic uses it now | ||
| (no key toggles this bit) | 6 | BIT_SER_BLOCKRD | Unprintable BYTEs autoenable it (unless BIT_SER_INHIBITBR) | ||||
| (no key toggles this bit) | 7 | BIT_SER_PROCESS | A command is enbuffered; service pending | ||||
| Bits in bFlags_Debug at SRAM address 0x125: | |||||||
| Key | Key name | ASCII value | Bit | Bit Name | Purpose / Notes | ||
| # | pound | 35 or 0x23 | 0 | BIT_DDT_EEPROM | Details when a BYTE in EEPROM changes | ||
| % | percent | 37 or 0x25 | 1 | BIT_DDT_SLEEP | Unused in the 328P; sleep details in other versions | ||
| ] | right bracket | 93 or 0x5D | 2 | BIT_DDT_SCRIPT | Enables detailed script process reporting | ||
| " | double quote | 34 or 0x22 | 3 | BIT_DDT_DETAILS | Reports each script line as it is processed | ||
| + | plus | 43 or 0x2B | 4 | BIT_DDT_SEQCHG | Terse info during sequencer mode changes | ||
| ) | right paren | 41 or 0x29 | 5 | BIT_DDT_SEARCH | Sequencer next Logic Block search details | ||
| * | asterisk | 42 or 0x2A | 6 | BIT_DDT_LEDS | For user use; no system logic uses it now | ||
| } | left brace | 125 or 0x7D | 7 | BIT_DDT_REGS | Enables output for DumpRegisters calls | ||
The last one is the '$' Manager Mode toggle. It can also be turned OFF from the command line with "Log" (for "LogOut" or "LogOff") but cannot be toggled ON that way; only the '$' first key does that (and can be used to also toggle it off, of course, just like the others above.)
Example of how the '#' toggle key causes EEPROM changes to be displayed.
> DE+ 0x300 16 0300: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................ >EW 0x300 = 42 S EEPROM BYTE at address 0x0300 changed from 0xFF to 0x2A EEPROM BYTE at address 0x0301 changed from 0xFF to 0x00 EEPROM BYTE at address 0x0302 changed from 0xFF to 0x81 EEPROM BYTE at address 0x0303 changed from 0xFF to 0x03 >DE+ 0x300 16 EEPROM contents: 0300: 2A 00 81 03 FF FF FF FF-FF FF FF FF FF FF FF FF *............... >EL 0x300 = -2 EEPROM BYTE at address 0x0300 changed from 0x2A to 0xFE EEPROM BYTE at address 0x0301 changed from 0x00 to 0xFF EEPROM BYTE at address 0x0302 changed from 0x81 to 0xFF EEPROM BYTE at address 0x0303 changed from 0x03 to 0xFF >DE+ 0x300 16 EEPROM contents: 0300: FE FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................ >EL 0x300 = -1 EEPROM BYTE at address 0x0300 changed from 0xFE to 0xFF >DE+ 0x300 16 EEPROM contents: 0300: FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................ >
| Notes: | |
| These are "toggle" keys. Each time one is input, the system flips the state of the corresponding bit. So, for example, typing "$$" immediately enables Manager mode and disables it again. As the first key is acted upon and purged, there are still no character in the buffer and the second one also is the first key in the buffer. Neither key is echoed to the console since each is the first character on the line. | |
| These BITs are all maintained in SRAM. After a reboot, all of them are OFF. The only one which the Operating System automatically sets after a reboot is BIT_SER_ECHO. | |
| See also: | |
| The registers System Command as well as the DumpRegisters and DumpRegs_Begin System Functions. | |