Bootloader Value Replacement via Trigger Address Matching
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Solution Overview
Problem
Bootloader instructions in electronic devices are inflexible, making it costly and inconvenient to update configuration settings for peripherals like accelerometers, especially when hardware revisions are required due to changes in initialization command values.
Innovation Solution
A replacement generator is integrated into the instruction processor to dynamically replace values accessed during the bootloader process by comparing trigger instruction addresses with current addresses and updating values accordingly, allowing for corrections without modifying the stored bootloader instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bootloader instructions are made fixed and stored in non-volatile memory, then device reliability is improved, but adaptability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-storing replacement values in non-volatile memory alongside the fixed bootloader instructions. When a configuration value needs to be updated, the system prepares the replacement value in advance in the non-volatile memory, so that during bootloader execution, the value can be dynamically replaced without modifying the original fixed instructions. This resolves the contradiction by maintaining the reliability of fixed instructions while enabling adaptability through pre-prepared replacement values.
Solution Approach 2:
The patent applies parameter changes by allowing configuration values within the bootloader instructions to be dynamically modified during execution. The system changes specific parameters (configuration values) while keeping the overall instruction structure fixed. This is achieved by comparing trigger values with current configuration values and replacing them when mismatches are detected, thus maintaining reliability of the fixed instruction framework while enabling adaptability of specific parameters.
2Adaptability or versatility
If hardware revisions are performed to update initialization command values, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies copying by creating replacement copies of configuration values and storing them in non-volatile memory. Instead of modifying the original fixed bootloader instructions or performing hardware revisions, the system creates alternative copies of the configuration values that can be swapped in during execution. This resolves the contradiction by enabling adaptability through value copying while avoiding the complexity and cost of hardware revisions.
Solution Approach 2:
The patent introduces an intermediary mechanism - the replacement value storage area in non-volatile memory - that mediates between the fixed bootloader instructions and the need for configuration updates. The intermediary allows dynamic value substitution without requiring hardware changes or complicating the device architecture. This resolves the contradiction by providing a simple intermediary layer that enables adaptability without increasing device complexity.
3Adaptability or versatility
If bootloader instructions are modified to update configuration values, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent applies segmentation by separating the fixed bootloader instruction structure from the configurable parameter values. The instructions are divided into immutable opcode portions and mutable data portions (configuration values). This allows the configuration values to be updated independently without affecting the manufacturing precision of the fixed instruction code. The segmentation enables adaptability while preserving the precision of the manufactured instruction set.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing replacement configuration values in non-volatile memory before device operation. Instead of modifying instructions during manufacturing or use, the system prepares all possible replacement values in advance. This resolves the contradiction by maintaining manufacturing precision of the original instructions while enabling adaptability through pre-prepared replacement values that can be activated as needed.
Data Source
AI summary
Methods, apparatus, and systems to replace values in a device are disclosed. An example apparatus includes a processor and a replacement generator coupled to the processor and configured to detect an access, by the processor, of a first instruction at a first address in a first memory, in response to the detected access, compare the first address to a set of trigger instruction address records in a second memory, wherein the set of trigger instruction address records includes a first trigger instruction address record that is associated with a first replacement address record and a first replacement value record, and based on the first address corresponding to the first trigger instruction address record, replace a first value at a second address in a third memory specified by the first replacement address record with a second value specified by the first replacement value record.