Hi, I am a complete novice in this field of uc programming and am still learning the ropes of it. I am working with an EVK1100 board and programming with AVR32 Studio Ver. 2.5 I have to generate a PWM signal with a frequency of 66 Mhz. I have already tried using the built in Example program in AVR32 studio i.e. EVK1100-Drivers-PWM example. It is working fine and I am able to manipulate the recieved signal by changing the value of Channel prescaler and the channel period in the main c program. But the minimum value of the prescaler that I can apply is 2 else it is giving me an error. Also the values of the period and duty cycle are 2 & 1 respectively (Have attached a screenshot of the same). I am observing the output at LED 7. The max freq I get with this is 28kHz. Is it possible to get a PWM output of 66Mhz with this configuration? Is an external clock signal required for the same? What can I further modify in the program? Please help...
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PWM.JPG
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The PWM clock is based off of the system clock MCK, it seems, so that's the maximum. The prescaler (2 in your case) can be set to 1 according to the datasheet. It think that would be AVR32_PWM_CPRE_MCK instead of AVR32_PWM_CPRE_MCK_DIV_2 (haven't tried though).
Dear John, Yes I did try that infact and I could get the signal frequency upto 56kHz but not further. I need a signal until 66Mhz and I do not know how I can multiply this signal so as to get the desired result!
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