AVR timebased pwm controller

Use an Atmega64 and DS1307 to control 2-4 channels of PWM.? Connected to 20x4 lcd module, have a menu to set time and date, a time to start? and stop? each? PWM channel, set the? maximum duty cycle for each channel, and? must be able to set the duration of the start up.? ? ? ? Example, at 7:00 am start? pwm and increment to 90% over a time of 90min. and at 6:00 pm start to decrement to 0% in a time of 40? minutes. Each channels should be independent. Prefer to use Bascom? code, but not necessary.