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/*----------------------------------------------------------------------------
* Name: LED.c
* Purpose: low level LED functions
* Note(s):
*----------------------------------------------------------------------------
* This file is part of the uVision/ARM development tools.
* This software may only be used under the terms of a valid, current,
* end user licence from KEIL for a compatible version of KEIL software
* development tools. Nothing else gives you the right to use this software.
*
* This software is supplied "AS IS" without warranties of any kind.
*
* Copyright (c) 2009-2011 Keil - An ARM Company. All rights reserved.
*----------------------------------------------------------------------------*/
#include "LPC17xx.h" /* LPC17xx definitions */
#include "LED.h"
const unsigned long led_mask[] = { 1UL<<28, 1UL<<29, 1UL<<31, 1UL<< 2,
1UL<< 3, 1UL<< 4, 1UL<< 5, 1UL<< 6 };
/*----------------------------------------------------------------------------
initialize LED Pins
*----------------------------------------------------------------------------*/
void LED_Init (void) {
LPC_SC->PCONP |= (1 << 15); /* enable power to GPIO & IOCON */
LPC_GPIO1->FIODIR |= 0xB0000000; /* LEDs on PORT1 are output */
LPC_GPIO2->FIODIR |= 0x0000007C; /* LEDs on PORT2 are output */
}
/*----------------------------------------------------------------------------
Function that turns on requested LED
*----------------------------------------------------------------------------*/
void LED_On (unsigned int num) {
if (num < 3) LPC_GPIO1->FIOPIN |= led_mask[num];
else LPC_GPIO2->FIOPIN |= led_mask[num];
}
/*----------------------------------------------------------------------------
Function that turns off requested LED
*----------------------------------------------------------------------------*/
void LED_Off (unsigned int num) {
if (num < 3) LPC_GPIO1->FIOPIN &= ~led_mask[num];
else LPC_GPIO2->FIOPIN &= ~led_mask[num];
}
/*----------------------------------------------------------------------------
Function that outputs value to LEDs
*----------------------------------------------------------------------------*/
void LED_Out(unsigned int value) {
int i;
for (i = 0; i < LED_NUM; i++) {
if (value & (1<<i)) {
LED_On (i);
} else {
LED_Off(i);
}
}
}
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