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| − | [[category: ARM Tutorials]] | + | #REDIRECT [[LPC1768: Led Blinking]] |
| − | [[User:Amruta|Amruta]] ([[User talk:Amruta|talk]]) 11:24, 17 March 2015 (IST)
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| − | -----
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| − | =Basics=
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| − | ====lpc17xx header file====
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| − | This is peripheral access header file for NXP LPC17xx device series. It contains all required register and peripheral definitions which one requires in order to access any peripheral.
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| − | If you take look at this header file, you will notice that all registers associated with a peripheral are clubbed together in a structure. So to access a register we need to use the respective structure
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| − | e.g. LPC_PINCON->PINSELx for PINSEL register,
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| − | LPC_GPIOx->FIOSET for GPIO register, etc.
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| − | ====PINSEL and GPIO====
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| − | =Schematic=
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| − | =Code=
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| − | In this code, we will demonstrate LED and Switch interfacing with the LPC1768.
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| − | We will monitor the switch condition and will glow LED when switch is pressed.
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| − | <syntaxhighlight>
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| − | #include "lpc17xx.h" // NXP Library containing all port abd register definations
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| − | #include "stdutils.h" // Explore Embedded library
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| − | #define LED 29 //P1.29
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| − | #define SWITCH 28 //P1.28
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| − | int main()
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| − | {
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| − | SystemInit();
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| − | LPC_PINCON->PINSEL3 = 0x00; // Configure Pin as GPIO
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| − | util_BitSet(LPC_GPIO1->FIODIR,LED); // Set pin direction as output
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| − | util_BitClear (LPC_GPIO1->FIODIR,SWITCH); // Set pin direction as input
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| − | while(1)
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| − | {
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| − | if (util_IsBitCleared (LPC_GPIO1->FIOPIN,SWITCH)) // check if switch is pressed
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| − | util_BitSet (LPC_GPIO1->FIOSET,LED); // turn on LED
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| − | else
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| − | util_BitSet (LPC_GPIO1->FIOCLR,LED); // turn off LED
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| − | }
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| − | }
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| − | {{DISQUS}}
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