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8x8 running message display

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gopalakrishnan

Joined: 18 Jun 2010
Posts: 25

8x8 running message display

Posted: Mon Jan 03, 2011 1:26 am

Code:

main(){
char cnt, col;

set_tris_b(0); /* set port_b as outputs */
set_tris_a(0); /* set port_a as output */

port_b = 0; /* ZERO port_a & port_b */
port_a = 0;

for( ;; )
{
col = 1;
for(cnt = 0;cnt < 5;cnt++)
{
port_b = pat[cnt];
port_a = col;

delay_ms(1);

col<<=1; } } }

hai to all I want to know what is the purpose of col<<=1 ? What is column masking ?

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