7.9.8.37. GEL_MapAddStr()¶
Adds to the memory map.
Syntax
GEL_MapAddStr(address, page, length, “attribute”, waitstate );
Parameters
| address | Starting address of a range in memory. This Parameters can be an absolute address, any C expression, the name of a C function, or an assembly language label. |
| page | Identifies the type of memory to fill: 0 (Program memory), 1 (Data memory) or 2 (I/O space) For processors which do not have more than one type of memory, use 0 for this Parameters. For simulated targets, the I/O Space option is not supported. |
| length | Defines the length of the range. This Parameters can be any C expression |
| attribute | Defines one or more attributes for the specified memory range. The attributes must be enclosed in quotation marks. See Predefined Attribute Strings. Additional attributes may be supported for your device driver. More than one attribute can be specified. Use the vertical bar “|” character to separate multiple attributes. For example, “R|W|P” is equivalent to “IOPORT”. Access size can be specified using “ASn”, where n is the access size in bytes. For example, “R|AS4” specifies 32 bits ROM. The attribute “SHnC” can be used to define a block of shared memory. |
| waitstate | Defines the number of waitstates. When reading from or writing to slower external memory, the CPU waits one extra clock cycle for every waitstate. The waitstate Parameters accepts any non-negative integer value (for example: 0, 1, 2, 3). |
Description
This function adds one or more attributes for a range of target memory to the memory map. If the range overlaps an existing entry, the attributes of the new range take precedence in the memory map.
Synchronous
Synchronous from GEL: Yes
Completely synchronous: Yes
Predefined Attribute Strings
String R W P EX EM PR ER DA ASn SHnC CACHE TX MN SA FL MR NULL |
Description Read Write Port External Emulator Programmable Erasable Dual access Access size Shared † Cache † Text Monitor Single access Flash Memory mapped NULL |
String NONE RAM ROM WOM INPORT OUTPORT IOPORT SARAM DARAM FLASH EXRAM EXROM EPROM MONITOR PRAM PROM NULL |
Description No memory/protecte d Read and write † Read only † Write only Port read only Port write only Port read and write Single access RAM Dual access RAM Flash ROM External RAM External ROM Erasable write-able EPROM Monitor ROM Program RAM Program ROM NULL |
†Defining Shared Memory describes how to use these attributes to add a range of shared memory to the memory map.
Example
Related Topics