stack pointer

Operating Modes of ARM Cortex-M3/M4

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Operating Modes of ARM Cortex-M3/M4

In the field of embedded development, the Cortex-M3/M4 processors have become the preferred architecture in areas such as the Internet of Things and industrial control due to their high performance, low power consumption, and rich peripheral support. This article will delve into its core design mechanisms—the cooperative working mechanism of dual stack pointers (MSP/PSP) and … Read more

Embedded Learning Day 2

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Embedded Learning Day 2

The Cortex-M3 processor features general-purpose registers R0-R15 along with several special function registers. Registers R0-R12 are 32-bit general-purpose registers used for data operations. However, most 16-bit Thumb instructions can only use R0-R7 (the low register group), while 32-bit Thumb-2 instructions can access all general-purpose registers. The special function registers have predefined functions and must be … Read more