Method of sequencing execution commands, execution method, computer program and integrated circuit

A method for causing a plurality of sets of instructions to be executed by a processing unit in a particular sequence, the method being implemented by a control unit suitable for periodically receiving time interrupts and for transmitting commands to the processing unit to execute the plurality of sets of instructions, the method comprising:

• a) initializing a main counter in a memory of the control unit to have a main instantaneous value of zero;
• b) incrementing the main instantaneous value of the main counter upon receipt of a time interrupt;
• c) in response to receiving the time interrupt, generating a command to execute a set of instructions among the plurality of sets of instructions at least in part by:
• i) initializing a secondary counter in the memory to have a secondary instantaneous value of zero;
• ii) calculating a value based on the main instantaneous value of the main counter and on the secondary instantaneous value of the secondary counter;
• iii) determining whether the calculated value is an integer;
• and
• iv) if the calculated value is an integer:
• comparing the secondary instantaneous value of the secondary counter to a predefined threshold stored in the memory;
• and
• based on determining that the secondary instantaneous value of the secondary counter is less than the predefined threshold, transmitting a command configured to cause the processing unit to execute a particular set of instructions among the plurality of sets of instructions, the command including the secondary instantaneous value of the secondary counter for identifying a rank of the particular set of instructions;
• or
• v) if the calculated value is not an integer, incrementing the secondary instantaneous value of the secondary counter and repeating steps ii) and iii);
• and
• d) repeating steps a) to c) at least once.