Quote Originally Posted by Caius1 View Post
Regarding the blink can you verify that the blink still occurs when:
1 The last value of the period = 2^nBits - 2 instead of 2^nBits-1
2 New value is only updated at the start of a pwm period.
I assume you mean reversing the order of bits 6 and 7.

Yes, the blink still occurs. It just happens at different numbers.
No matter which way you order the bit's, if they are only scanned in one direction, there will always be a blink at some point.

I also found that at other points in the dutycycle, the original BAM has several more less obvious blinks as the phase shift does the exact same thing in the lower bits. You just can't see them as well because they are shorter periods. But if you stare right at the LED straight on, you can definitely see them.

However, the symmetrical nature of the Mirror Imaged waveform, completely eliminates ALL of the blinking. It's really amazing how well it fixed the problems.

You can see how it works from the animation in this thread ...

MIBAM - (Mirror Imaged Bit Angle Modulation)
http://www.picbasic.co.uk/forum/showthread.php?t=10564