//Main/***************************************************************** Author: kh@ipimp.at****************************************************************** Minimum setup of GPIO ****************************************************************/#include "gpio.h" // Generel Purpose Input/Output#include "rcc.h" // Reset and clock Control#include "usart.h"#include "I2C.h"#include <stdio.h>#include <stdint.h>/* * Time structure */struct time { int sec; int min; int hour; int day; int month; int year;};/* * Check if year is leap year */int leap_year(int year){ if(year % 400 == 0 || (year % 100 != 0 && year % 4 == 0)){ return 1; // Is leap year } else { return 0; // Is not leap year }}/* * Get year lenght in days */int year_len(int year){ if(leap_year(year)){ return 366; // 366 days in leap year } else { return 365; // 365 days in normal year }}/* * Get month lenght in days */int month_len(int month, int year){ if(month == 2){ // February is 28/29 days return (leap_year(year) ? 29 : 28); } else { // Normal is 30/31 days return ((month - 1) % 7 % 2 ? 30 : 31); }}int time_to_seconds(struct time *t){ int i, seconds; // Year printf("Calculating seconds since 1970\r\n"); for(i = 1970; i<t->year; i++){ int days; days = year_len(i); printf("Calculating number of seconds in year %i (days: %i)\r\n", i, days); // Convert year to seconds seconds += 60*60*24*days; } // Month for(i = 1; i<t->month; i++){ int days; days = month_len(i, t->year); printf("Calculating number of seconds in month %i in %i (days: %i)\r\n", i, t->year, days); seconds += 60*60*24*days; } // Days printf("Calculating seconds in days in month %i in year %i\r\n", t->month, t->year); for(i = 1; i<t->day; i++){ printf("Calculating number of seconds in day %i in month %i\r\n", i, t->month); seconds += 60*60*24; } // Hours printf("Calculating seconds in hours in day %i in month %i\r\n", t->day, t->month); seconds += 60*60*t->hour; // Minuts printf("Calculating seconds in minuts in hour %i in day %i in month %i\r\n", t->hour, t->day, t->month); seconds += 60*t->min; // Seconds printf("Adding remaining seconds\r\n"); seconds += t->sec; // Return return seconds;}int seconds_to_time(int seconds){ return 0;}int main (void) { int seconds; struct time t; // Start Clock on GPIO Port E (Enable port E) rcc_apb2enr(RCC_APB2ENR_IOPEEN,ENABLE); rcc_clockmode5(); usart_enable(); //unsigned int volatile * const RSSE2 = (unsigned int *) (RCC_BASE + 0x18); //*RSSE2 |= 1 << 6; //Setting bit 8 to 15 of PORT E to Generel Purpose output push-pull max 50Mhz GPIOE->CRH=0x33333333; putstr("\x1b[2J\x1b[H"); putstr("I2C Initialise\n\r"); I2C_Init(); printf("Setting time\r\n"); // Convert datetime struct to secconds t.sec = 44; t.min = 11; t.hour = 22; t.day = 5; t.month = 7; t.year = 2012; seconds = time_to_seconds(&t); printf("Converted %i-%i-%i %02i:%02i:%02i to %i secs\r\n", t.year, t.month, t.day, t.hour, t.min, t.sec, seconds); //Do stuff printf("Starting main-loop\r\n"); printf("==================\r\n\n"); while (1) { // Running }}