MDK for STM32C0/F0/G0/L0 and BlueNRG-1/2/LP/LPS provides software developers working with STM32 and BlueNRG family devices with a free-to-use tool suite. Keil MDK is the most comprehensive software development system for Arm processor-based microcontroller applications.
When addressing these specifications, software traps are considered to be the best way to achieve a high observability while maintaining high flexibility, as the designer defines the relevant events and introduces the trap code in the required places in the code. In order to achieve a very low intrusion level, a hardware attachable node frees the monitored system from the task of monitoring data management. The communication between both nodes must be performed through standard interfaces already available in most of the monitored nodes, providing reusability and hardware independence. Consequently, an active hybrid hardware/software solution is considered to be the best proposal.
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This implementation uses a 4-bit coding for events, as shown in Table 1. Designers are free to define their own codes (and additional data) in order to adjust the system to the monitoring and application operation they require.
The implementation costs in the sensor nodes is, usually, very low. Commonly, microcontrollers in sensor nodes have free communication interfaces that can be used to send the traps to the Monitor node. The only additional hardware engineering required is that the selected interface is externally available through a connector.
The time intrusion of active monitoring tools is much greater that those caused by the presented solution. For example, an active tool like Envirolog [3,30], in which the sensor node is in charge of capturing the trap events, processing and storing them in flash memory, can generate an overhead of 70% for 15 traps. This overhead seems unacceptable in a real scenario, explaining the interest in hybrid solutions to free the sensor node from most of the monitoring functions.
Arm provides software developers working with Nuvoton devices based on the Arm Cortex-M0, Cortex-M0+, and M23 processors with a free-to-use professional tool suite for commercial use.
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