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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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AN4141 Scheda tecnica(PDF) 7 Page - STMicroelectronics |
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AN4141 Scheda tecnica(HTML) 7 Page - STMicroelectronics |
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7 / 42 page  DocID023425 Rev 2 7/42 AN4141 Why migrate from HAL to StdPeriph_Lib? 1.1.1 CMSIS description As part of the CMSIS, ARM provides the following software layers, which are available for various compiler implementations: • Core peripheral access layer: contains name definitions, address definitions and helper functions to access core registers and peripherals. It also defines a device- independent interface for RTOS kernels that includes debug channel definitions. • Device peripheral access layer: provides definitions for all device peripherals. For a Cortex-Mx microcontroller system, CMSIS defines: • A common way of accessing peripheral registers and a common way of defining exception vectors • Register names of the core peripherals and names of the core exception vectors • A device-independent interface for RTOS kernels, including a debug channel • Interfaces for middleware components (TCP/IP stack, flash file system) 1.1.2 CMSIS structure Figure 1 illustrates different layers for a CMSIS-based application. Figure 1. CMSIS layer structure Application code Real-time kernel Middleware components Core peripheral functions Middleware access functions Device peripheral functions Peripheral register & interrupt vector definitions Cortex CPU SysTick RTOS kernel timer NVIC nested vector interrupt controller Debug/Trace interface Other peripherals ai15990 |
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