A method for accessing functions of an embedded device, for example a controller programmable from memory, wherein function blocks of the embedded device are assigned to at least two hierarchically superimposed levels, an access to a function block of the embedded device occurs from outside of the embedded device by a data interface, and for access an authentication must occur for the level to which the respective function block is assigned, and again for each individual level above the level to which the function block is assigned, to permit execution of a function of the function block, wherein the functions of the function blocks permit access to a firmware of the embedded device.

A method for accessing functions of an embedded device, for example a controller programmable from memory, wherein function blocks of the embedded device are assigned to at least two hierarchically superimposed levels, an access to a function block of the embedded device occurs from outside of the embedded device by a data interface, and for access an authentication must occur for the level to which the respective function block is assigned, and again for each individual level above the level to which the function block is assigned, to permit execution of a function of the function block, wherein the functions of the function blocks permit access to a firmware of the embedded device.

The present disclosure relates to methods and devices of process editing, acquisition and process data protection for solar cell production apparatus. The process editing method includes: storing hardware information of the production apparatus of a solar cell production line in a process editing terminal; editing first process data of at least one of the production apparatus via a process editor in the process editing terminal; and encrypting the first process data according to the hardware information of the production apparatus stored in the process editing terminal and an encryption method to obtain a first process file of the production apparatus.