Data generating method, connection checking system, and computer product

A connection checking system comprising:

• a writing device that writes to programmable devices, checking data for checking a connection between terminals of the programmable devices;
• and
• a plurality of the programmable devices that work based on the checking data, and that are connected to one another on a board, wherein the writing device includes
• a retrieving unit that retrieves terminal data of terminals of the programmable devices,
• a determining unit that determines whether each of the terminals is an output terminal or an input terminal based on the terminal data and determines whether each of the terminals is an external connection terminal to be coupled to an external device other than the programmable devices;
• a setting up unit that sets up an assumed terminal in the external device every time a terminal is determined to be the external connection terminal by the determining unit;
• an assigning unit that assigns unique data to the output terminal, and the assumed terminal coupled to the input terminal;
• a recording unit that records comparison data in association with information about the input terminal and the assumed terminal coupled to the output terminal, the comparison data being same as the unique data of a corresponding output terminal or a corresponding assumed terminal;
• a generating unit that generates, for each programmable device, a checking circuit that checks the connections between the terminals by comparing the unique data with the comparison data, and
• a writing unit that writes to the programmable devices, the checking data corresponding to the checking circuit, wherein
• the programmable devices check, based on the checking data, whether there is a failure in connections between terminals on the board, and
• the generating unit generates
• an output circuit that causes the unique data to be output from output terminals,
• a comparing circuit that compares data input from input terminals with the comparison data, and
• a timer circuit that switches, when a predetermined time elapses after the unique data is output from the output terminals, between the input direction and the output direction of the unique data of the bi-directional terminals.

A computer-readable recording medium that stores therein a computer program that causes a computer to generate checking data to be written to programmable devices for checking a connection between terminals of the programmable devices, the computer program causing the computer to execute:

• retrieving terminal data of the terminals of the programmable devices;
• determining whether each of the terminals is an output terminal or an input terminal based on the terminal data;
• determining whether each of the terminals is an external connection terminal to be coupled to an external device other than the programmable devices;
• setting up an assumed terminal in the external device every time a terminal is determined to be the external connection terminal;
• assigning unique data to the output terminal, and the assumed terminal coupled to the input terminal;
• recording comparison data in association with information about the input terminal and the assumed terminal coupled to the output terminal, the comparison data being same as the unique data of a corresponding output terminal or a corresponding assumed terminal;
• generating, for each of the programmable devices, a checking circuit that checks the connection between the terminals by comparing the unique data with the comparison data;
• and
• generating the checking data corresponding to the checking circuit, wherein the generating the checking circuit includes
• generating an output circuit that causes the unique data to be output from output terminals,
• generating a comparing circuit that compares data input from input terminals with the comparison data, and
• generating a timer circuit that switches, when a predetermined time elapses after the unique data is output from the output terminals, between the input direction and the output direction of the unique data of the bi-directional terminals.