Difference between revisions of "IO Operations"
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[[User:Amruta|Amruta]] ([[User talk:Amruta|talk]]) 11:24, 17 March 2015 (IST) | [[User:Amruta|Amruta]] ([[User talk:Amruta|talk]]) 11:24, 17 March 2015 (IST) | ||
----- | ----- | ||
+ | |||
+ | =Basics= | ||
+ | =Code= | ||
+ | |||
+ | <syntaxhighlight> | ||
+ | |||
+ | |||
+ | #include "lpc17xx.h" // NXP Library containing all port abd register definations | ||
+ | #include "stdutils.h" // Explore Embedded library | ||
+ | |||
+ | #define LED 29 //P1.29 | ||
+ | #define SWITCH 28 //P1.28 | ||
+ | int main() | ||
+ | { | ||
+ | SystemInit(); | ||
+ | |||
+ | LPC_PINCON->PINSEL3 = 0x00; // Configure Pin as GPIO | ||
+ | util_BitSet(LPC_GPIO1->FIODIR,LED); // Set pin direction as output | ||
+ | util_BitClear (LPC_GPIO1->FIODIR,SWITCH); // Set pin direction as input | ||
+ | |||
+ | while(1) | ||
+ | { | ||
+ | if (util_IsBitCleared (LPC_GPIO1->FIOPIN,SWITCH)) // check if switch is pressed | ||
+ | util_BitSet (LPC_GPIO1->FIOSET,LED); // turn on LED | ||
+ | else | ||
+ | util_BitSet (LPC_GPIO1->FIOCLR,LED); // turn off LED | ||
+ | } | ||
+ | } |
Revision as of 11:53, 17 March 2015
Amruta (talk) 11:24, 17 March 2015 (IST)
Basics
Code
#include "lpc17xx.h" // NXP Library containing all port abd register definations #include "stdutils.h" // Explore Embedded library #define LED 29 //P1.29 #define SWITCH 28 //P1.28 int main() { SystemInit(); LPC_PINCON->PINSEL3 = 0x00; // Configure Pin as GPIO util_BitSet(LPC_GPIO1->FIODIR,LED); // Set pin direction as output util_BitClear (LPC_GPIO1->FIODIR,SWITCH); // Set pin direction as input while(1) { if (util_IsBitCleared (LPC_GPIO1->FIOPIN,SWITCH)) // check if switch is pressed util_BitSet (LPC_GPIO1->FIOSET,LED); // turn on LED else util_BitSet (LPC_GPIO1->FIOCLR,LED); // turn off LED } }