Incorporates the ARM7TDMI® ARM® Thumb® Processor . Atmel’s AT91SAM7X/ is a member of a series of highly integrated Flash. Development Board for the Atmel AT91SAM7X Microcontroller trademarks or trademarks of ARM Ltd. I2C™ is a trademark of Koninklijke. Microchip AT91SAM7X ARM Microcontrollers – MCU are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Microchip.

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The semaphore immediately unblocks the uIP task, which processes the data and if necessary generates a response.

The interaction is further simplified by the single buffer memory management of uIP. Therefore a ‘Check’ task is created whose job it is to ensure that no errors have been detected amr any of the other tasks.

The toggle rate increasing to ms indicates that the ‘Check’ task has discovered at least one error. Performance is therefore greatly improved by transmitting dynamically generated data as one large packet, rather than multiple small packets. See the Source Code Organization section for a description of the downloaded files and information on creating a new project.

Functionality The demo application creates 33 tasks – consisting predominantly of the standard demo application tasks see the demo application section for details of the individual tasks. Entering the IP address into the web browser obviously use the correct IP address for your system. This can be ensured by making the first three octets of both IP addresses identical.

Building the demo application for debug Two project configurations are provided. Use the tree menu to navigate groups of related pages. Open a web browser on the connected computer. When executing correctly the demo application will behave as follows: See the Demo Application Hardware Setup notes above.


Ark IP addresses used by the web browser computer and the prototyping board must be compatible. The CGI script used to generate the table of tasks transmits the entire table in one packet and therefore loads quickly.


The embedded microcontroller Flash memory will automatically get programmed with the demo application, and the debugger will break at the reset vector address 0. It waits for each packet to be acknowledged individually. In addition there is a uIP task that implements the embedded web server, a ‘Check’ task and at91eam7x256 idle task.

When a buffer is available for processing an EMAC interrupt is generated. Simply open the rtosdemo. This is in contrast to the lwIP demo, where mutual exclusion is explicitly handled by use of a semaphore at the network interface level. For example, if the web browser computer uses IP address The perl script requires Linux or, as I use, a Cygwin shell.

Performance The uIP stack only permits one packet to be unacknowledged at any one time. See at91sam7x265 uIP documentation for further information. You must ensure that the configured MAC address is unique on the network to which the prototyping board is being connected.

Ensure an Ethernet cable is connected as described above. If this is the case, then it is also likely that the project file has been silently corrupted and will need to be restored to its original state before it can be built even with an updated IAR version. Every three seconds the at91sam7x56 task examines all the tasks in the system to ensure they are executing without error. The lwIP stack implements a more flexible complex memory management scheme, therefore the lwIP demo application contains a more comprehensive EMAC driver.


Demonstrates the creation of ar91sam7x256 data with a simple CGI scripting language written by Adam Dunkels.

The driver included in the download uses the EMAC in its most basic configuration. The demo application uses the LEDs built into the prototyping board so no other hardware setup is required.

Thread aware file system Hint: See the Embedded Ethernet Examples List page for more information. If you are not using one of these demo application xrm then ensure At9sam7x256 mode is entered before calling vTaskStartScheduler. The size of each transmit buffer is equal to the uIP buffer size.

The prototyping board should also allow the use of a standard Ethernet cable when connecting point to point, but I have not tested this configuration. This must be set appropriately for your hardware.

Atmel AT91SAM7X (ARM) Board, Color LCD, USB, 2x

Selecting the flash debug configuration Running the demo application The IAR port cannot be executed using the IAR simulator so must be executed on the target hardware.

If this project fails to build then it is likely the version of IAR Embedded Workbench being used is at91sam7x25 old. This site required JavaScript to be enabled. This demo – Consists entirely of open source software.