Quote from: lampii on December 06, 2016, 09:41:03 pm
When ever I set my RD, CS, WR, RS pins to their alternate function, my FMC stops streaming. Time to dig deeper .
It might be timing. If you have a logic analyser then probe WR and some data lines to see how long your write transaction is versus the limits in the datasheet. The F429 is a very fast device and you could be exceeding the LCD timing limits when using the FMC. Setting the lines manually with GPIO will be much, much slower and could be bringing you back into spec.
Also, CS is usually not required and can be tied low (active).