1# CMSIS-Core Device Files {#cmsis_device_files}
2
3The **CMSIS-Core Device Files** implement CMSIS-Core support for a specific microcontroller device or family of devices. These files are typically provided by the device vendor and use \ref cmsis_standard_files via \#include directives.
4
5CMSIS-Core specifies the organization of CMSIS-Core Device Files, defines their functionalities, and provides unified naming conventions. This brings   following benefits:
6 - Simplified device support for vendors with fast scaling for device families and variants on all Arm Cortex-M cores.
7 - Uniform workflows and experience for application developers.
8
9Following CMSIS-Core Device Files are defined:
10 - \subpage system_c_pg
11 - \subpage device_h_pg
12 - \subpage startup_c_pg
13 - \subpage linker_sct_pg
14\if ARMv8M
15 - \subpage partition_h_pg
16 - \subpage partition_gen_h_pg
17\endif
18
19\ref cmsis_files_dfps explains how to distribute \ref cmsis_device_files in CMSIS-Pack format.
20
21## Device Template Files {#cmsis_template_files}
22
23CMSIS-Core includes the template files that simplify the creation of CMSIS-Core Device Files for a specific device variant.
24
25Silicon vendors typically need to add to these template files the following information:
26 - **Device Peripheral Access Layer** that provides definitions for device-specific peripherals.
27 - **Access Functions for Peripherals** (optional) that provides additional helper functions to access device-specific peripherals.
28 - **Interrupt vectors** in the startup file that are device specific.
29
30Template File                       | Description
31:-----------------------------------|:----------------------------------------
32�� CMSIS/Core/Template/Device_M     | Folder with CMSIS-Core device file templates ([See on GitHub](https://github.com/ARM-software/CMSIS_6/tree/main/CMSIS/Core/Template/Device_M/))
33 ┣ �� Config                        | Template configuration files
34    ┣ �� Device_ac6.sct   | \ref linker_sct_pg template
35    ┣ �� Device_gcc.ld    | Linker description file for GNU GCC Arm Embedded Compiler
36    ┗ �� partition_Device.h |\ref partition_h_pg template
37 ┣ �� Include                       | Template header files
38    ┣ �� Device.h         | \ref device_h_pg template
39    ┗ �� system_Device.h  | \ref system_Device_sec
40 ┗ �� Source                        | Template C files
41    ┣ �� startup_Device.c | \ref startup_c_pg template
42    ┗ �� system_Device.c  | \ref system_Device_sec
43
44**Adapt Template Files to a Device**
45
46Each template file contains comments that start with **ToDo:** and describe required modifications.
47
48The templates contain several placeholders that need to be replaced when creating CMSIS-Core device files:
49
50Placeholder                | To be replaced with
51:--------------------------|:----------------------------------------
52`<Device>`                 | The specific device name or device family name, for example `LPC17xx`
53`<DeviceInterrupt>`        | The specific interrupt name of the device, for example `TIM1` for Timer 1 interrupt
54`<DeviceAbbreviation>`     | Short name or abbreviation of the device family, for example `LPC`
55`Cortex-M#`                | The specific Cortex-M processor name, for example `Cortex-M3`
56
57Device files for the \ref device_examples can be also a good reference point for implementing CMSIS-Core support for specific devices.
58