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Embedded Systems With LPC1769.pptx

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Embedded Systems With LPC1769.pptx

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Embedded Systems With LPC1769
-N.SIVA GOVIND
Assistant Professor
1
GPIO’S IN LPC1769
● GPIO is what lets your microcontroller be something more than a weak auxiliary
processor
● With it you can interact with the environment, connecting up other devices and
turning your microcontroller into something useful.
What is a GPIO
2
3
Important GPIO registers
➢PINSEL
➢FIODIR
➢FIOSET
➢FIOCLR
4
5
#include <lpc17xx.h>
int main(void)
{
int i;
LPC_PINCON->PINSEL1 = 0x00000000;
LPC_GPIO0->FIODIR = 0x02000000;
while(1)
{
LPC_GPIO0->FIOSET = 0x02000000;/*PORT 0 25TH PIN SET AS 1*/
for(i=0;i<50000;i++);
LPC_GPIO0->FIOCLR = 0x02000000;/* PORT 0 25TH PIN SET AS 1*/
for(i=0;i<50000;i++);
}
}
6
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Embedded Systems With LPC1769.pptx

Editor's Notes

  1. N SIVA GOVIND Assistant professor