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How to change GPIO PORT CLK = CPU1 CLK.

Peter Adamcik
Expert 1425 points

Hi Guys, I'm doing a VGA driver project using F28377D. I'm running PORTA through a home made 12bit (4096 colours) resistor DAC. All colours and HSYNC / VSYNC timing is working fine but I can see that the speed of PORTA is not running the same speed as CPU1. I can change the PLL to whatever speed I like and I can see the speed change in the horizontal pixel resolution but it still seems that the GPIO PORT is not running as fast as CPU1. Even at hi clock rates the pixel res is very low which proves to me that the GPIO ports is not running as fast as CPU1.

How do I change the Peripheral clock to GPIO clk = CPU1 clock.

I can't seem to find info on changing the peripheral clock.

Thanks guys again for your help :)

Pete