Some define in i0_cfg.h in nRFready Desktop 2 keyboard part

Question

#define IO_CHERRY8x16_ROW_PORT 0x13E02040UL
#define IO_CHERRY8x16_COLUMN_PORT 0x60031FBFUL 
 Why this number be defined like this ? What are this two things use for? 
 If I what custom made mine own keyboard should I change this number?

Håkon Alseth · Accepted Answer

Hi, 
 That is the IO mask that the rows and columns are connected to the GPIO port.
Each bit place indicates what GPIOs it is connected to externally.
You can see how it's used in drv_keyboard_cherry8x16.c file. 
 If you make your own custom board, you will have to find which rows and columns goes to which GPIO on the nRF, and then map up the buttons manually. 
 Best regards
Håkon