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Setting ENABLE_LCD_3V3 and LCD_OE_5V om J18

I have added a KingTech LCD using RGB 24 bit parallel interface to the TMX320DM365 board using the J18, 19 and 23.

To enable backlight I need to activate the following enablers:

ENABLE_LCD_3V3

LCD_OE_5V

I have used the /usr/bin/mem_util with parameters

0x0b000000 b 0xC0 but when measuring on pin 2 and 10 on J18 are not showing 3.3 V and 5V respectively. There is however a constant 5V on pin 1.

I can toggle the LEDs using 0x04000010 b 0xFF and 0x00 so what is wrong with the parameters for 3V3 and 5V?