ATNEL tech-forum2014-11-09T20:34:12+01:00https://forum.atnel.pl/feed.php?f=58&t=9162&mode2014-11-09T20:32:36+01:002014-11-09T20:32:36+01:00https://forum.atnel.pl/viewtopic.php?t=9162&p=103055#p103055<![CDATA[Re: Atmega32 i RTC DS1302 - problem]]>Statystyki: Napisane przez grzeszal — 9 lis 2014, o 20:32
]]>2014-11-09T20:20:31+01:002014-11-09T20:20:31+01:00https://forum.atnel.pl/viewtopic.php?t=9162&p=103052#p103052<![CDATA[Re: Atmega32 i RTC DS1302 - problem]]>
grzeszal napisał(a):
...nie chce mi działać z Atmegą32
... a JTAG'a odznaczyłeś? - on może psuć PORTC
Pozdr.
Statystyki: Napisane przez kicajek — 9 lis 2014, o 20:20
]]>2014-11-09T20:34:12+01:002014-11-09T18:23:03+01:00https://forum.atnel.pl/viewtopic.php?t=9162&p=103034#p103034<![CDATA[Atmega32 i RTC DS1302 - problem]]>Przy Atmedze32 dostaję dziwne odczyty typu data: 45/45/20145, a godzina np. 45:82:67
main.c [syntax=c]/* * main.c * * Created on: 18-11-2013 * Author: Grzegorz */ #include <stdlib.h> #include <stdio.h> #include <avr/io.h> #include <avr/interrupt.h> #include <avr/pgmspace.h> #include <avr/eeprom.h> #include <util/delay.h> #include <util/atomic.h>
oraz pliki obsługi RTC [syntax=c]#ifndef __RTC2_CONFIG_H__ #define __RTC2_CONFIG_H__ /* * bibloteka zostala zmodyfikowany do pracy w systemie 24 godzinnym (RTC2_FORMAT_24) */
// if there is no configuration then apply some defaults #ifndef RTC2_PORT
// port where DS1302 is connected. currently only one port mode // is supported, e.g. you should connect all lines from DS1302 // to one port #define RTC2_PORT PORTC #define RTC2_PIN PINC #define RTC2_DDR DDRC
// DS1302 SCLK line #define RTC2_CLK PC0 // DS1302 I/O line #define RTC2_IO PC1 // DS1302 CE line #define RTC2_CE PC2
// memory read address range. write address = read address - 1 // make sure this matches your datasheet #define RTC2_MEM_START 0xC1 #define RTC2_MEM_END 0xFD
#endif
// following defines disable/enable library features. // to save some space you can disable unused functionality.
// define global variable? #ifndef RTC2_DEFAULT #define RTC2_DEFAULT 1 #endif
// a macro for getting available memory size. not used anywhere, // maybe can be used in program #define RTC2_MEM_SIZE ((RTC2_MEM_START - RTC2_MEM_END) / 2 + 1)
// Read (update) functions {{{ #if RTC2_READ // gets all clock value from DS1302 void rtc2_update(rtc2_datetime dst); // gets specified fields from DS1302. fields are given // as bitwise concatenation of RTC2_*_FIELD constants. // providing RTC2_ALL_FIELDS is effectively the same // as rtc2_update. void rtc2_get(rtc2_datetime dst, uint8_t fields);
// Timestamp conversion functions {{{ #if RTC2_TIMESTAMP // **WARNING1**: IT IS IN LOCAL TIMEZONE // **WARNING2**: Because we have unsigned chars everywhere // and today is 2014 after all, base line for calculation // is 2000/1/1 00:00:00. E.g. all dates are treated like they're // after the this date. // // returns UNIX timestamp (since 1970/1/1 00:00:00) // month starts from 1, years are two digits since 2000 uint32_t rtc2_mktime(uint8_t seconds, uint8_t minutes, uint8_t hours, uint8_t date, uint8_t month, uint8_t year); // wrapper passing rtc2_datetime fields to rtc2_mktime uint32_t rtc2_timestamp(rtc2_datetime src); // populates rtc2_datetime from timestamp // will return 0 if timestamp is < RTC2_BASE_TIMESTAMP which is 1st January 2000 uint8_t rtc2_localtime(rtc2_datetime dst, uint32_t timestamp); #endif //}}}
#endif // }}}
// RAM access functions {{{ #if RTC2_RAM
// offset in RAM functions is relative to RTC2_MEM_START. // do not pass actual address. // whenever those functions see that target have offset not fiting // into memory range they'll silently cancel. // // functions operating on memory chunks verify both first byte (offset) // and last byte (offset + size). // // also those functions will work in burst mode only if offset is 0 // that is reading from beginning of memory and RTC2_BURST is non-zero.
// Initializer. Configures I/O ports and maybe sets up global variable {{{ void rtc2_init(void){ // set all pins to output RTC2_DDR |= _BV(RTC2_CE) | _BV(RTC2_CLK) | _BV(RTC2_IO); // and turn them off RTC2_PORT &= ~(_BV(RTC2_CE) | _BV(RTC2_CLK) | _BV(RTC2_IO));
// initialize default global pointer if needed #if RTC2_DEFAULT && (RTC2_READ || RTC2__WRITE) RTC2_VALUE = &rtc2_default; #endif } // }}}
// Utility stuff used to reset current transfer state {{{ static inline void rtc2_reset(void){ RTC2_STOP_TRANSMISSION; RTC2_CE_HIGH; } // }}}
// Low level write functions {{{
// Routine used for pretty much any operation {{{ #if RTC2_READ || RTC2_WRITE ||RTC2_RAM || RTC2_UTILITY static void rtc2_write_byte(uint8_t byte){ uint8_t i;
// decode values received from DS1302 from BCD to bin encoding. // see datasheet for details. because some registers // contain also control bits we cut off higher parts // that are not data. static uint8_t rtc2_parse_val(uint8_t field, uint8_t val){ switch(field){ case RTC2_SECONDS_READ: case RTC2_MINUTES_READ: val = (val & 0x0F) + ((val & 0x70) >> 4) * 10; break; case RTC2_HOURS_READ: val = (val & 0x0F) + ((val & 0x30) >> 4) * 10; break; case RTC2_DATE_READ: val = (val & 0x0F) + ((val & 0x30) >> 4) * 10; break; case RTC2_MONTH_READ: val = (val & 0x0F) + ((val & 0x10) >> 4) * 10; break; case RTC2_WDAY_READ: val &= 0x07; break; case RTC2_YEAR_READ: val = (val & 0x0F) + ((val & 0xF0) >> 4) * 10; break; }
// check that first byte is valid *and* last byte is valid too // (hence whole chunk fits) if(RTC2_MEM_WRITE_INVALID(offset) || RTC2_MEM_WRITE_INVALID(offset + size * 2)) return;
// here we read until 0 byte or up to maxlen - 1 // to guarantee we always have a valid C string. for(; maxlen > 1; --maxlen, ++str, offset += 2){ *str = rtc2_read(offset);