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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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Creates 31 of the standard demo tasks in addition to the web server task and at91zam7x256 idle task. If you are not using one of these demo application projects then ensure Supervisor mode is entered before calling vTaskStartScheduler.

uIP Embedded Web Server Demo on the AT91SAM7X ARM Using FreeRTOS

The interaction is further simplified by the single buffer memory management of uIP. The CGI script used to generate the table of tasks transmits the entire table in one packet and therefore loads quickly. Open a web browser on the connected computer. The demo application uses the LEDs built into the prototyping board so no other hardware setup is required. This ay91sam7x256 be ensured by making the first three octets of both IP addresses identical. At991sam7x256 is demonstrated by the sample CGI scripts included in the source code download.


The toggle rate increasing to ms indicates that the ‘Check’ task has discovered at least one error. When a buffer is available for processing an EMAC interrupt is generated.


Use the tree menu to navigate groups of related pages. The target hardware will serve web pages to a standard web browser. If this is the case, then it is also likely that the project file has been silently corrupted and will need to at991sam7x256 restored to its original state before it can be built even with an updated IAR version.

Delivered online or on-site. This demo – Consists entirely of open source software. The perl script requires Linux or, as I use, a Cygwin shell.

When executing correctly the demo application will behave as follows: Therefore a ‘Check’ task is created whose job it is to ensure that no errors have been detected in any of the other tasks. Performance The uIP stack only permits one packet to be unacknowledged at any one time. For example, if the web browser computer uses IP address The size of each transmit buffer is equal to the uIP buffer size. It waits for each packet to be acknowledged individually.

Thread aware file system.

To connect to the target: Every three seconds the ‘Check’ task examines all the tasks in the system to ensure they are executing without error. Thread aware file system Hint: Simply open the rtosdemo. Please refer to the SAM7S demo documentation for more detailed information. If this project fails to build then it is likely the version of IAR Embedded Workbench being used is too old. 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.


See the Source Code Organization section for a description of the downloaded files and information on creating a new project. 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.

See the Embedded Ethernet Examples List page for more information. Not all the tasks update an LED so have no visible indication that they are operating correctly.

Selecting the flash debug configuration. Performance is therefore greatly improved by transmitting dynamically generated data as one large packet, rather than multiple small packets. Entering the IP address into the web browser obviously use the correct IP address for your system. The uIP task blocks on the semaphore with a timeout.

Atmel AT91SAM7X256

Building the demo application for debug Two project configurations are provided. The IP addresses used by the web browser computer and the prototyping board must be compatible.

This must be set appropriately for your hardware. Demonstrates the creation of dynamic data with a simple CGI scripting language written by At91sam7x56 Dunkels. This is in contrast to the lwIP demo, where mutual exclusion is explicitly handled by use of a semaphore at the network interface level.