Bump. I could still use some help with this. Even if I hookup PB1 to the PWM input on the LD-29, I would still like to know about how this would be done. I have another project (17mm DD+7135 — linear regulated driver w/ FET turbo) which would benefit from the ability to use two PWM outputs (not simultaneously). The PCB for that project is already laid out for using both PB0 and PB1.
Dunno, but I’ll be quite happy if anyone has an answer… because when I get time I’d rather like to make a RGBW light with each color controlled individually… and I’m hoping I can use PWM arbitrarily on any two colors at the same time (most likely will need a better MCU though, with two PWM channels).
It might be a while before I can start on that though… too many other projects.
Sorry guys, was hoping someone else would chime in ;)
I've never changed the PWM from PB1 to PB0, but it looks like, along with what you changed already, you need to change TCCR0A to this...
TCCR0A = 0x83; // phase corrected PWM is 0x81 for PB0, fast-PWM is 0x83
That's my guess looking at the datasheet, which I've never been the best at reading. I just searched for TCCR0A and the first two bits relate to COM0A (PB0), and the next two bits relate to COM0B (PB1). So instead of it being "0010", it's "1000".
An outstanding thing for me to look into for RMM is the ability to change the PWM output pin based on the mode selected (so you could have a single 7135 on one pin, the rest on the other), and/or be able to change the PWM mode between phase correct and fast PWM based on the mode as phase correct does a better job with lower levels. I'm sure this was discussed before, I just haven't been paying attention lately :(
Thanks JonnyC, I’ll try that and continue to poke around in that vein if it doesn’t work by itself.
If there was a discussion about the minimum level that Fast PWM vs Phase Correct PWM could sustain, I missed it too.
I was thinking of using a 2D array to store pin states (including PWM levels) for modes. I think that could be implemented in a reasonably flexible way in order to facilitate drivers which need to do various pin sequences for modes. We currently have drivers with one PWM pin, plus drivers which operate like the DQG 26650 driver (a run pin + several pins which should be turned on exclusively for different modes), and in the future I’d really like to have a driver which operates the way I described here (#32). I think it might be possible for us to describe the modes for each of those drivers (plus the DD+7135 one I linked to before) using the same array format.
OK, so, what did you copy it from? Notepad? Was 'word wrap' enabled in notepad when you copied it? Atmel Studio chokes on the line breaks if you paste in source that's using 'word wrap'. That frequently causes those kind of errors - some variable ends up being placed on a new line by itself when it really belongs at the end of the previous line. 'Word wrap' is the cause of that.
Also, your screenshot is not showing the line with the error in it (line 59), please take another shot showing what's on line 59 (double click the entry in the 'errors' list at the bottom, it will scroll the upper window to the problem line automatically).