STM32 Journal - Digikey

STM32 Journal
CMSIS comprises several parts
(see Figure 4):
〉〉 CMSIS-CORE is a standard API
for all Cortex-M-based devices
and abstracts key functionality
〉〉 CMSIS-RTOS provides an API
for RTOS integration with other
tools and middleware
〉〉 CMSIS-DSP is a collection of
61 digital signal processing
functions that take advantage
of the STM32’s integrated
floating-point and DSP
capabilities. The library is
designed for block processing
to reduce interrupt overhead,
optimize DMA utilization, and
facilitate easy integration with
an RTOS or kernel
〉〉 CMSIS-SVD provides a
System View Description for all
peripherals to abstract actual
peripheral implementations
from application code and
enable peripheral-awareness
for debuggers
With the release of CMSIS 3.0,
ARM is standardizing on an
RTOS API that makes it easier
for middleware components from
different vendors to interoperate.
This will facilitate the propagation
of application-specific
components, such as a TCP/
IP stack, as well as enable the
USER
CMSIS
MCU
CMSIS-DSP
DSP-Library
CMSIS-CORE
SIMD
Cortex-M4
Cortex
CPU
development tool chain to be
RTOS-aware.
The CMSIS DSP library gives
developers a substantial head
start on the development of
complex algorithms. It also
allows developers to create
complex application code that
can be carried between MCUs
Application Code
CMSIS-RTOS
API
Real Time Kernel
(3 rd Party)
Core Peripheral Functions
Peripheral Register & Interrupt Vector Definitions
SysTick
RTOS Kernel
Timer
NVIC
Nested Vectored
Interrupt Controller
DEBUG
+ Trace
that may not have hardwarebased
DSP instructions. This
means that developers can write
code for the STM32 F2 and,
when they compile it for the
STM32 F4, automatically get the
full advantage of the STM32 F4’s
DSP capabilities.
Device Peripheral
Functions
(Silicon Vendor)
Other
Peripherals
Debugger
(3 rd Party)
System View
Description (XML)
CMSIS-
SVD
Figure 4 The ARM Cortex Microcontroller Software Interface Standard (CMSIS) provides a consistent software interface that
accelerates product development as well as simplifies software reuse across the entire STM32 product line of 300+ devices.
Peripheral
View
Accelerated Peripheral
Configuration and
Driver Design
One time-consuming part
of product development is
configuring an MCU’s peripherals
and then writing drivers for
the application to utilize them.
To facilitate faster application
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