ARM ARM DUI 0224I manual Loading and running an application from NOR flash, Load region in flash

Models: ARM DUI 0224I

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Getting Started

2.6.7Loading and running an application from NOR flash

To run an image from NOR flash:

1.Build the application as described in Building an application with the platform library on page 2-23 and specify a link address suitable for flash. There are the following options for selecting the address:

Load region in flash

The image is linked such that its load region, though not necessarily its execution region, is in flash. The load region specified when the image was linked is used as the location in flash and the FLASH_ADDRESS option is ignored. If the blocks in flash are not free, the command fails. Use the FLASH RUN command to run the image.

Load region not in flash and image location not specified

The image is programmed into the first available contiguous set of blocks in flash that is large enough to hold the image. Use the FLASH LOAD and then the FLASH RUN commands to load and run the image.

Load region not in flash, but image stored at a specified flash address

Use the FLASH_ADDRESS option to specify the location of the image in flash. If the option is not used, the image is programmed into the first available contiguous set of blocks in flash that is large enough to hold the image. Use the FLASH LOAD or FLASH RUN commands to load and run the image.

Note

Images with multiple load regions are not supported.

If the image is loaded into flash, but the FLASH RUN command relocates code to

SDRAM for execution, the execution address must not be in the top 4MBytes of

SDRAM since this is used by the Boot Monitor.

2.The image must be programmed into flash using the Boot Monitor. Flash support is implemented in the Boot Monitor image.

Run the Boot Monitor image from the debugger and enter the flash subsystem, type FLASH at the prompt:

>FLASH

flash>

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ARM DUI 0224I

Page 60
Image 60
ARM ARM DUI 0224I manual Loading and running an application from NOR flash, Load region in flash