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/*
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* This programmer uses AT91' System clock
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*
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* 2010 by Ricardo V. Rojas Quispe
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include "./Librerias/at91sysclock.h"
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//Mapeando los registro en memoria:
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AT91S_PMC *clock_map(unsigned int clockbase){
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int fd;
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void *base;
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AT91S_PMC *clock;
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off_t addr = clockbase;
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if ((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1) {
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fprintf(stderr, "Cannot open /dev/mem.\n");
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exit(EXIT_FAILURE);
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}
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//fprintf(stderr, "/dev/mem opened.\n");
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base = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, addr & ~MAP_MASK);
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if (base == (void *) -1) {
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fprintf(stderr, "Cannot open /dev/mem.\n");
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exit(EXIT_FAILURE);
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}
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//fprintf(stderr, "Memory mapped at address %p.\n", base);
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clock = base + (addr & MAP_MASK);
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return clock;
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}
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//Habilitamos el clock de ADC
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void enable_clock_adc(AT91S_PMC * clock){
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clock->PMC_PCER=0x20;
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}
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//Leemos el registro de estado de clock para perifericos
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unsigned int status_clock_adc(AT91S_PMC * clock){
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return (clock->PMC_PCSR);
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}
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