I want to use the TI TLC5940 led driver to build a module.
It can be controlled via SPI, that’s not the problem.
But as described in the datasheet it needs a reference clock for grayscale PWM control on pin GSCLK.
I googled a while and only found a few AVR and arduino examples. They always use timer interrupts to do that.
There are also matches that use NetMF. First one is this:
and the second one (netduino) is that:
I simply don’t understand how I can get the count for the GSCLK pin.
In the first article the threadstarter wrote about “LPC2387” to generate the signal.
Altough Brett described the meaning of it, I don’t get it
And in the second article, an external circuit is used (I don’t have enough skills to understand the usage of the components, so I would avoid to use that solution).
So can someone tell me what “LPC2387” means, or are there other solutions the get the signal? Maybe using an AVR only for that?