I use the function vTaskDelay( ( portTickType ) 500 ); to delay the task and to turn on and off a led. I notice that the led is flashing at a slower frequency than expected. In the configuration file the following setup: configCPU_CLOCK_HZ            ( ( unsigned portLONG ) 8000000 ) configTICK_RATE_HZ            ( ( portTickType ) 1000 ) I would think 1ms is one tick?? So a delay of 500 should be half a second?? I’am using an ATMEGA32 with 8Mhz resonator and have CKOPT, SUT0, CKSEL3, CKSEL2, CKSEL1 turned on and programmed with Ponyprog.

Have you changed the start up code at all?  The function prvSetupTimerInterrupt() in port.c?  It works exactly for me.  I don’t know ponyprog, but I suspect a fuse setting problem.

Try to verify the clock setting by toggling an LED within a timer interrupt before starting the scheduler.  For example, toggle the LED every 1000 ticks to get a 1 second toggle. Once you have got the frequency correct try the scheduler test again. I suspect the clock fuse settings might be incorrect. Regards.

Set the clock fuse settings to the Calibrated Internal RC Oscillator at 8Mhz and it is running fine now. Thanx for comments, Adrian