Basic Dhrystone Project 1.4

Purpose

This application measures how many dhrystone per seconds that the chip can produce under several different configurations.

Description

When launched, this program displays a menu on the DBGU, enabling the user to choose between several options:

• Change the processor & master clock frequencies
• Enable or disable the processor instruction cache (SAM9 only)
• Start a dhrystone measurement

Usage

1. Build the program and download it inside the evaluation board. Please refer to the SAM-BA User Guide, the GNU-Based Software Development application note or to the IAR EWARM User Guide, depending on your chosen solution.
2. On the computer, open the DBGU port with a terminal application (e.g. HyperTerminal on Microsoft Windows).
• Settings: 115200 bauds, 8 bits, 1 stop bit, no parity, no flow control.
3. Start the application.
4. The application menu should appear as shown below (example for AT91SAM9263):

   -- Basic Dhrystone Project 1.4 --

Menu :
------
0: Set PCK = 240 MHz, MCK = 120 MHz
1: Set PCK = 120 MHz, MCK = 120 MHz
2: Set PCK = 96 MHz, MCK = 48 MHz
3: Set PCK = 48 MHz, MCK = 48 MHz
i: Toggle instruction cache
m: Perform measurements
h: Display this menu again


   Select one or more options to set the configuration of the device, then start a measurement by typing 'm'.

Atmel Corporation ©2008