US 10,120,677 B2Granted

Method of rewriting printer firmware, and printer

AssigneeSeiko Epson Corporation

InventorsMakoto Noguchi, Akio Takamoto, Makoto Yoshiki, Masahiro Takei

Life of this patent

Estimating the term…

Loading patent…

Abstract

A printer having multiple processor cores, and a firmware rewriting method for the printer, enable rewriting firmware in a short time. A first rewrite controller controls rewriting the firmware of the first core by the boot program of the first core; a second rewrite controller controls rewriting the firmware of a second core, which is one of the multiple cores other than the first core, by the boot program of the first core; and a reset unit resets the printer after rewriting the firmware of the first core and the firmware of the second core by the boot program of the first core ends.

Claims8

Dependent claims

A firmware rewriting method of a printer, comprising:

receiving, by a first core that includes a first processor and a first memory, from an external device, first rewrite firmware for rewriting first firmware and second rewrite firmware for rewriting second firmware;
storing the received first rewrite firmware and the second rewrite firmware using a boot program of the first core to a memory outside the first core and the second core;
rewriting the first firmware of the first core using the boot program of the first core and the first rewrite firmware read from the memory outside the first core and the second core;
rewriting the second firmware of a second core that includes a second processor and a second memory using the boot program and the second rewrite firmware read from the memory outside the first core and the second core;
and
resetting the printer after rewriting the first firmware and rewriting the second firmware.

3 more elements

A printer, comprising:

a first core that includes a first processor and a first memory, the first core storing a boot program and first firmware;
a second core that includes a second processor and a second memory, the second core storing second firmware;
memory outside of the first core and the second core configured to store received first rewrite firmware and second rewrite firmware;
and
a reset unit configured to reset the printer after the first firmware and the second firmware are rewritten using the boot program of the first core;
wherein the first core is configured to rewrite the first firmware of the first core and to rewrite the second firmware of the second core using the boot program,
the first core is configured to receive from an external device the first rewrite firmware for rewriting the first firmware, and the second rewrite firmware for rewriting the second firmware, and
the first core configured to rewrite the first firmware of the first core using the first rewrite firmware read from the memory outside of the first core and the second core, and to rewrite the second firmware of the second core using the second rewrite firmware read from the memory outside of the first core and the second core.

5 more elements

Dependencies are inferred from the claim text.