A method for updating a firmware - component and the apparatus - of the measuring and control technology

摘要

The present invention relates to a method for updating a the functionality of a device of the mess - and control technology which provides the first firmware - component which in a microcontroller of the device is embedded, comprising:– segment-wise receiving a first firmware - images by means of a connected with an external device data ports of the microcontroller, wherein the first firmware - image a data area and a signature field, and wherein the data area for updating the first firmware - component, comprising a firmware - program code data, and the signature field is generated after a first cryptomethods, a first authentication information contains;– Performing an authentication of the first firmware - images on the basis of the first authentication information by means of a first firmware - component included auth_id - algorithm after the first cryptomethods;– Generating a second authentication information for the in the data area of the first firmware - image data contained by means of one of the first firmware - component included algorithm for the production of the second authentication information according to any one of the first cryptomethods, different, second cryptomethods;– after successful authentication of the first firmware - image storing the second authentication information in a persistent memory of the device;– Erasing of the first firmware - component, wherein the erasing is embedded in the microcontroller by means of a second firmware - component is controlled;– renewed transmission of the means for updating the first firmware - component data serving as a component of a second firmware - images, with the participation of the second firmware - component via the data ports to the microcontroller and storing the data in persistent memory of the microcontroller;– Performing an authentication of the in the case of the new transmission received second firmware - images on the basis of the stored in the microcontroller by means of a second authentication information from the second firmware - component included auth_id - algorithm according to the second cryptomethods, and– for the case of a successful authentication of the second firmware - images actively switching and executing the with the second firmware - image transmitted and stored firmware - program code as the new first firmware - component.