Hi i'm a beginner in MCUs world . i'm facing some issues ... in LPC17XX datasheet there are 6-output general purpose PWM available in LPC1768 I'm planning to use 7 PWM pin to control the speed of 7 BLDCs by ESCs but i need one more PWM pin .(i need them separately)
sometimes it happen that some more pin of a kind are required separately(i mean asynchronous) do you have any idea how to solve this problem ? by the way this micro has one specialized motor control PWM can i use it for 7th one ? i may also need some more PWM pins for 2 or 3 DC motors (synchronous) .
I've found out that one expanding way is using multiplexers for synchronous buses . one more way that i saw pple used with arduino was Latch method and shift register method ( in this method they use 74Hc595 ).... but they have their own difficulty ....
Eh????
But your problem is that fact that your chip has insufficient PWM pins for your requirement.
So you chose the wrong chip!
As explained, there is no way to change that; so choosing a different chip - which does meet your requirements - is the solution to your problem!
IF U CANT CHANGE HOUR CHIP ADD ANOTHER SO U GET MORE PWMS. JUST NEED SOMETHING LIKE I2C OR SPI OR PARRALEL (HA HA) SO THE CHIPS TALK TO EACH OTHER.