文件列表:

Real-Time Clock (ASM) (0, 2007-08-07)
Real-Time Clock (ASM)\RTC.dpj (4079, 2007-06-27)
Real-Time Clock (ASM)\RTC_stopwatch_wake.asm (9156, 2007-06-27)

**************************************************************************************************** ADSP-BF537 EZ-KIT Lite RTC Example Analog Devices, Inc. DSP Division Three Technology Way Norwood, MA 02062 Date Created: 12/14/04 ____________________________________________________________________________________________________ This directory contains an example ADSP-BF537 RTC project that does a basic blink routine and then puts the part in deep sleep mode to be woken up from a RTC Stopwatch Event. Once woken up, the RTC is reconfigured to toggle the EZ KIT LEDs using RTC second, minute, hour, and day interrupts. Files contained in this directory: RTC.dpj VisualDSP++ project file RTC_stopwatch_wake.asm assembly file for application code readme.txt this project description file ____________________________________________________________________________________________________ CONTENTS I. FUNCTIONAL DESCRIPTION II. IMPLEMENTATION DESCRIPTION III. OPERATION DESCRIPTION I. FUNCTIONAL DESCRIPTION The RTC demo demonstrates the ability of the Real-Time Clock to wake the processor up after being put into deep sleep mode and the processor's abilities to service real-time interrupts by toggling LEDs in real time. II. IMPLEMENTATION DESCRIPTION The main portion of the algorithm calls: 1. Setup_Interrupt_Vectors - overwrites the default EVTx values setup in startup.asm for EVTs used 2. Configure_Flash - initializes the flash ports to have access to the EZKIT's LEDs 3. Blink_LEDs - flashes the LEDs to show a running algorithm before going to deep sleep 4. GoTo_DeepSleepMode - sets RTC wake-up event at 16 seconds, writes PLL_CTL to go to deep sleep 5. Configure_RTC - after wake-up, resets RTC to toggle LEDs for real-time interrupts III. OPERATION DESCRIPTION - Open the project "RTC.dpj" in an ADSP-BF537 EZ-KIT Lite session in the VisualDSP Integrated Development Environment (IDDE). - Under the "Project" tab, select "Build Project" (program is then loaded automatically into DSP). - Select "Run" from the "Debug" tab on the menu bar of VisualDSP. - Observe LEDs flashing and then getting "stuck" for 16 seconds while processor is in deep sleep. - After 16 seconds, LED display clears and then: LED1 toggles every second LED2 toggles every minute LED3 toggles every hour LED4 toggles every day

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