Simple LED toggle won't work: xCore 200 MC (Multi Channel Au Topic is solved

[holdend]

Hi,

I am just trying to get the 4x4 LED array on this dev board to light up. I don't see anything wrong with the simple few lines of code attached - does anyone know why the LED's arent responding? Thanks!

[Vineela]

Hi, could you please write all '0' s on rows and '1's on columns for all the leds to glow? On xcore-200-MC board rows of led matrix are active low and columns are active high. Please check the schematics for more information.

Thanks,

Vineela.

 

 

[mon2]

Try again but with the following declaration for the ports:

Code: Select all

/* LED grid port */
on tile[1] : out port p_leds_row = XS1_PORT_4C;
on tile[1] : out port p_leds_col = XS1_PORT_4D;

 

and your revised code:

printstrln("toggle!");
p_leds_row <: (unsigned) (0x0);
p_leds_col <: (unsigned) (0xF);
while(1);

From the user manual schematics for this development board, the LED matrix is bonded to Tile[1] GPIO pins so this detail must be manually declared otherwise you are tickling the wrong set of GPIO pins which are on Tile[0]. Been there, done that :)