User guide

4 HDMI5 Component Video Switch
K.I.S.S.™ (Continued)
mal parameter used by the command. For instances if the bits ‘AS’ and ‘IJ’ where to be set to 1, and the rest of the bits set to zero, the parameter value would be calculated as: 8+1, making the parameter value: 9. The command to directly set those two bits, and reset all the others would be:
XS 9<CR>
Individual bits of a bitmapped parameter can be set or reset without affecting the other bits, by prefi xing the bitmapped parameter with a ‘+’ to set individual bits, or a ‘-’ to reset individual bits.
For instance in the above example the bitmapped value has been set to ‘9’. If we would now like to enable the IR remote, by setting the ‘IRE’ bit, the following command can be issued:
XS +4<CR>
The will set the ‘IR’ bit, and have no affect on the others, and the new “XS” value would be: 13 If we’d like to now disable the IR jack and the IR remote functions and the Front Panel, by clear- ing the ‘IRJ’, ‘IRE’ & ‘FP’ bits, we’d use the value “16+4+2”, or 22, and issue the command:
XS -22<CR>
leaving the new “XS” value to be: 1.
Command Checksums and CRC-8 Checkcodes A checksum or CRC-8 checkcode may be appended to any command, and if given, will be calculated by the device and compared with the given value. If a mismatch occurs an error will be returned and the command will not be executed. This can be used to help assure reliable op- eration in noisy environments. Checksums are more commonly used in serial protocols, however CRC-8 checkcodes offer a more secure means of insuring error free communications. A checksum or CRC-8 checkcode is appended to the command by adding a semicolon (‘;’) or colon (‘:’) suffi x character followed by the checksum or checkcode. An example of appending a checksum to a command:
LI 2,13;178<CR>
the ‘;’ indicates a checksum follows, the ‘178’ is the checksum of the command string up to and including the ‘;’ character. In a similar fashion a CRC-8 checkcode can be appended to a command:
LI 2,13:213<CR>
The ‘:’ indicates that a CRC-8 checkcode follows, the ‘213’ is the calculated CRC-8 checkcode. Optional spaces are allowed before the ‘;’ and ‘:’ characters but NOT after them. The checksum must immediately follow the ‘;’ character, and a CRC-8 checkcode must immediately follow the ‘:’ character, anything else, including whitespace, will cause a syntax error to be returned. Similarly the <CR> must immediately follow the checksum or checkcode parameter or a syntax error will
25HDMI5 Component Video Switch
Response String: =XE settings Where ‘settings’ is a bitmapped parameter:
Decimal Value +4096 +2048 +1024 +512 +256 +128 +64 +32 +16 +8 +4 +2 +1 Bit Position 12 11 10 9876543210 Name RS2 RS1 RL2 RL1 EQU SWD CTL LMI IRC IRR BTN SEL PWR Factory Settings: 0 0 0 0000000011
PWR - 1=Power State has changed. SEL - 1=Selection (Input / Output Mapping) has changed. BTN - 1=One or more buttons have been pressed. IRR - 1=A new IR code has been received. IRC - 1=New IR codes have been learned. LMI - 1=Lighting Mode or Intensity Level Settings have changed. CTL - 1=Control Settings have changed. SWD - 1=Switching delays have changed. EQU - 1=Equalization or Bandwidth settings have changed. RL1 - 1=Auxiliary 1’s relay has changed states. RL2 - 1=Auxiliary 2’s relay has changed states. RS1 - 1=Auxiliary 1 relay’s parameters have changed. RS2 - 1=Auxiliary 2 relay’s parameters have changed.
The ‘$’ parameter is a “Backup Control Settings” fl ag. If it exists, then the current settings will be backed up in EEPROM, and will remain unchanged through a power failure. Backing up the “Extended Control Settings” will also backup the “Control Settings”. Input Equalization & Bandwidth This command allows setting the equalization, bandwidth and control settings of the currently selected input.
EQU equ,bw,ctl,$ Where: equ = Indicates the cable length equalization setting (0=Shortest, 15=Longest). bw = Bandwidth setting. (0=4MHz, 1=3MHz, 2=6Mhz, 3=5MHz). ctl = Bitmapped control settings (See following bitmap table). $ = If present, settings are backed up in EEPROM. Response string: =EQU equ,bw,ctl
HDMI5 Command Ref. (Cont’d)