target/linux/at91/image/dfboot/src/led.c

   1 /*
   2  * (C) Copyright 2006
   3  * Atmel Nordic AB <www.atmel.com>
   4  * Ulf Samuelsson <ulf@atmel.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <AT91RM9200.h>
  26
  27 #define GREEN_LED       AT91C_PIO_PB0
  28 #define YELLOW_LED      AT91C_PIO_PB1
  29 #define RED_LED AT91C_PIO_PB2
  30
  31 void    LED_set(unsigned int led)
  32 {
  33         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  34         PIOB->PIO_SODR          = (led ^ 0x7) & 0x7;            // All 0's => Set PIO high => OFF
  35         PIOB->PIO_CODR          =  led & 0x7;                   // All 1's => Set PIO low   => ON
  36 }
  37
  38 void    green_LED_on(void)
  39 {
  40         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  41 //      PIOB->PIO_CODR          = GREEN_LED;
  42         PIOB->PIO_CODR          = (1 << 0);
  43 }
  44
  45 void     yellow_LED_on(void)
  46 {
  47         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  48 //      PIOB->PIO_CODR          = YELLOW_LED;
  49         PIOB->PIO_CODR          = (1 << 1);
  50 }
  51
  52 void     red_LED_on(void)
  53 {
  54         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  55 //      PIOB->PIO_CODR          = RED_LED;
  56         PIOB->PIO_CODR          = (1 << 2);
  57 }
  58
  59 void    green_LED_off(void)
  60 {
  61         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  62 //      PIOB->PIO_SODR          = GREEN_LED;
  63         PIOB->PIO_SODR          = (1 << 0);
  64 }
  65
  66 void    yellow_LED_off(void)
  67 {
  68         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  69 //      PIOB->PIO_SODR          = YELLOW_LED;
  70         PIOB->PIO_SODR          = (1 << 1);
  71 }
  72
  73 void    red_LED_off(void)
  74 {
  75         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  76 //      PIOB->PIO_SODR          = RED_LED;
  77         PIOB->PIO_SODR          = (1 << 2);
  78 }
  79
  80 void    LED_blink(unsigned int led)
  81 {
  82         volatile int i,j;
  83         for(i = 0; i < 5; i++) {
  84                 LED_set((1 << led)&0x7);
  85                 for(j= 0; j < 200000; j++);
  86                 LED_set(0);
  87                 for(j= 0; j < 200000; j++);
  88         }
  89 }
  90
  91
  92 void LED_init (void)
  93 {
  94         AT91PS_PIO      PIOB    = AT91C_BASE_PIOB;
  95         AT91PS_PMC      PMC     = AT91C_BASE_PMC;
  96         PMC->PMC_PCER           = (1 << AT91C_ID_PIOB); // Enable PIOB clock
  97         // Disable peripherals on LEDs
  98         PIOB->PIO_PER           = AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
  99         // Enable pins as outputs
 100         PIOB->PIO_OER           = AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
 101         // Turn all LEDs OFF
 102         PIOB->PIO_SODR          = AT91C_PIO_PB2 | AT91C_PIO_PB1 | AT91C_PIO_PB0;
 103 }