SLAU131V User guide | 德州仪器 TI.com.cn

SLAU131V October 2004 – February 2020

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B.2.5 Placement Map

The <placement_map> element describes the memory placement details of all named memory areas in the application, including unused spaces between logical groups that have been placed in a particular memory area.

The <memory_area> is a description of the placement details within a named memory area (container). The description consists of these items:

The <name> names the memory area (string).
The <page_id> gives the id of the memory page in which this memory area is defined (constant).
The <origin> specifies the beginning address of the memory area (constant).
The <length> specifies the length of the memory area (constant).
The <used_space> specifies the amount of allocated space in this area (constant).
The <unused_space> specifies the amount of available space in this area (constant).
The <attributes> lists the RWXI attributes that are associated with this area, if any (string).
The <fill_value> specifies the fill value that is to be placed in unused space, if the fill directive is specified with the memory area (constant).
The <usage_details> lists details of each allocated or available fragment in this memory area. If the fragment is allocated to a logical group, then a <logical_group_ref> element is provided to facilitate access to the details of that logical group. All fragment specifications include <start_address> and <size> elements.
- The <allocated_space> element provides details of an allocated fragment within this memory area (container):
  - The <start_address> specifies the address of the fragment (constant).
  - The <size> specifies the size of the fragment (constant).
  - The <logical_group_ref> provides a reference to the logical group that is allocated to this fragment (reference).
- The <available_space element provides details of an available fragment within this memory area (container):
  - The <start_address> specifies the address of the fragment (constant).
  - The <size> specifies the size of the fragment (constant).