Techniques of accessing serial console of bmc using host serial port

An apparatus, the apparatus being an embedded-system device, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• provide to a host of the embedded-system device control of a first serial port controller at the embedded-system device;
• provide to an operational program at the embedded-system device control of a second first serial port controller of the embedded-system device;
• connect a serial port at the embedded-system device with the first serial port controller;
• determine whether the embedded-system device is in a predetermined condition;
• when the embedded-system device is not in the predetermined condition:
• receive, at the first serial port controller, first command or data from the host for driving the first serial port controller;
• generate, at the first serial port controller, first signals in accordance with the first command or data;
• and
• output the first signals at the serial port;
• when the embedded-system device is in the predetermined condition:
• disconnect the serial port from the first serial port controller;
• connect the serial port with a second serial port controller at the embedded-system device;
• receive, at the second serial port controller, second command or data from the operational program for driving the second serial port controller;
• generate, at the second serial port controller, second signals in accordance with the second command or data;
• and
• output the second signals at the serial port.

A non-transitory computer-readable medium storing computer executable code for operating an embedded-system device, comprising code to:

• provide to a host of the embedded-system device control of a first serial port controller at the embedded-system device;
• provide to an operational program at the embedded-system device control of a second first serial port controller of the embedded-system device;
• connect a serial port at the embedded-system device with the first serial port controller;
• determine whether the embedded-system device is in a predetermined condition;
• when the embedded-system device is not in the predetermined condition:
• receive, at the first serial port controller, first command or data from the host for driving the first serial port controller;
• generate, at the first serial port controller, first signals in accordance with the first command or data;
• and
• output the first signals at the serial port;
• when the embedded-system device is in the predetermined condition:
• disconnect the serial port from the first serial port controller;
• connect the serial port with a second serial port controller at the embedded-system device;
• receive, at the second serial port controller, second command or data from the operational program for driving the second serial port controller;
• generate, at the second serial port controller, second signals in accordance with the second command or data;
• and
• output the second signals at the serial port.