Execute application code from CCM RAM using the IAR EWARM toolchain

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Execute application code from CCM RAM

using the IAR EWARM toolchain

2.1

Executing a simple code from CCM RAM (except for interrupt

handler)

A simple code can be composed of one or more functions that are not referenced from an

interrupt handler. If the code is referenced from an interrupt handler, follow the steps

described in Section 2.2: Executing an interrupt handler from CCM RAM.

EWARM provides the possibility to place one or more functions or a whole source file in

CCM RAM.

This operation requires a new section to be defined in the linker file (.icf) to host the code to

be placed in CCM RAM. This section is copied to CCM RAM at startup. The required steps

are the following:

1.

Define the address area for the CCM RAM by indicating the start and end addresses.

2.

Tell the linker to copy at startup the section named .ccmram from Flash memory to

CCM RAM.

3.

Indicate to the linker that the code section .ccmram should be placed in the CCM RAM

region.

Refer to Figure 2: EWARM linker update for an example of code implementing these

operations.

Note:

This procedure is not valid for interrupt handlers.