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AB_RTC.c
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AB_RTC.c
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#include "AB_RTC.h"
#include "i2c_driver_init.h"
#include <time.h>
static uint32_t m_time_stamp;
static uint32_t minimum_epoc = 989443411;// Wednesday, 9 May 2001 ., 21:23:31 ????
static uint8_t bcd2bin (uint8_t val) { return val - 6 * (val >> 4); }
static uint8_t bin2bcd (uint8_t val) { return val + 6 * (val / 10); }
static uint32_t abrtc_write(uint8_t reg, uint8_t* val, uint16_t len);
static uint32_t abrtc_read(uint8_t reg, uint8_t* val, uint16_t len);
static uint32_t abrtc_decimal_of_seconds_set(abrtc_decimal_of_seconds_t val);
static uint32_t abrtc_decimal_of_seconds_get(abrtc_decimal_of_seconds_t* val);
uint32_t AB_RTC_set_timestamp(uint32_t unix_time_stamp)
{
// Dummy abstraction until real RTC driver will be implemented
// m_time_stamp = unix_time_stamp;
// return 0;
uint32_t ret = 0;
abrtc_seconds_t sec_reg;
abrtc_minutes_t min_reg;
abrtc_flags_t flag_reg;
abrtc_calendar_t clock_regs;
struct tm *hmn_rdbl_tm;
Twi1_Enable();
memset(&sec_reg,0,sizeof(sec_reg));
memset(&flag_reg,0,sizeof(flag_reg));
ret = abrtc_read(ABRTC_SECONDS_REG,(uint8_t*)&sec_reg,sizeof(sec_reg));
ret |= abrtc_read(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
if(ret == 0)
{
if( (sec_reg.os != osc_is_enabled) & (flag_reg.of != oscilator_failure_not_detected) )
{
flag_reg.of = oscilator_failure_not_detected;
ret |= abrtc_write(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
sec_reg.os = osc_is_enabled;
ret |= abrtc_write(ABRTC_SECONDS_REG,(uint8_t*)&sec_reg,sizeof(sec_reg));
}
hmn_rdbl_tm = localtime( (time_t*)&unix_time_stamp );
ret = abrtc_read(ABRTC_DECIMAL_OF_SECONDS_REG,(uint8_t*)&clock_regs,sizeof(clock_regs));
clock_regs.decimal_seconds.sec_div_10 = 0;
clock_regs.decimal_seconds.sec_div_100 = 0;
clock_regs.seconds.seconds = bin2bcd(hmn_rdbl_tm->tm_sec);
clock_regs.minutes.minutes = bin2bcd(hmn_rdbl_tm->tm_min);
clock_regs.hours.hours = bin2bcd(hmn_rdbl_tm->tm_hour);
clock_regs.dayes.weekday = bin2bcd((hmn_rdbl_tm->tm_wday + 1)); // weekday accepts 1-7 values tm_wday are 0-6
clock_regs.date.date = bin2bcd((hmn_rdbl_tm->tm_mday ));
clock_regs.month_century.month = bin2bcd((hmn_rdbl_tm->tm_mon + 1)); // month accepts 1-12 values tm_wday are 0-11
clock_regs.month_century.century = century_20xx;
clock_regs.year.year = bin2bcd((hmn_rdbl_tm->tm_year + 1900) - 2000);
ret |= abrtc_write(ABRTC_DECIMAL_OF_SECONDS_REG,(uint8_t*)&clock_regs,sizeof(clock_regs));
}
Twi1_Disable();
return ret;
}
uint32_t AB_RTC_get_timestamp()
{
// Dummy abstraction until real RTC driver will be implemented
// m_time_stamp++;
// return m_time_stamp;
uint32_t ret;
abrtc_seconds_t sec_reg;
abrtc_minutes_t min_reg;
abrtc_flags_t flag_reg;
abrtc_calendar_t clock_regs;
struct tm hmn_rdbl_tm;
Twi1_Enable();
memset(&sec_reg,0,sizeof(sec_reg));
memset(&flag_reg,0,sizeof(flag_reg));
memset(&hmn_rdbl_tm,0,sizeof(hmn_rdbl_tm));
ret = abrtc_read(ABRTC_SECONDS_REG,(uint8_t*)&sec_reg,sizeof(sec_reg));
ret |= abrtc_read(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
if(ret == 0)
{
if( (sec_reg.os != osc_is_enabled) & (flag_reg.of != oscilator_failure_not_detected) )
{
flag_reg.of = oscilator_failure_not_detected;
ret |= abrtc_write(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
sec_reg.os = osc_is_enabled;
ret |= abrtc_write(ABRTC_SECONDS_REG,(uint8_t*)&sec_reg,sizeof(sec_reg));
AB_RTC_set_timestamp(minimum_epoc);
m_time_stamp = minimum_epoc;
}
else
{
ret = abrtc_read(ABRTC_DECIMAL_OF_SECONDS_REG,(uint8_t*)&clock_regs,sizeof(clock_regs));
hmn_rdbl_tm.tm_sec = bcd2bin(clock_regs.seconds.seconds);
hmn_rdbl_tm.tm_min = bcd2bin(clock_regs.minutes.minutes);
hmn_rdbl_tm.tm_hour = bcd2bin(clock_regs.hours.hours);
hmn_rdbl_tm.tm_wday = bcd2bin(clock_regs.dayes.weekday) - 1;
hmn_rdbl_tm.tm_mday = bcd2bin(clock_regs.date.date);
hmn_rdbl_tm.tm_mon = bcd2bin(clock_regs.month_century.month) - 1;
hmn_rdbl_tm.tm_year = (bcd2bin(clock_regs.year.year) + 2000 ) - 1900;
hmn_rdbl_tm.tm_isdst = -1; // Is DST on? 1 = yes, 0 = no, -1 = unknown
m_time_stamp = mktime(&hmn_rdbl_tm);
}
}
return m_time_stamp;
}
uint32_t abrtc_init(uint8_t* osc_does_not_stopped)
{
uint32_t ret = 0;
abrtc_seconds_t sec_reg;
abrtc_minutes_t min_reg;
abrtc_flags_t flag_reg;
abrtc_month_alarm_t alarm_reg;
Twi1_Enable();
memset(&sec_reg,0,sizeof(sec_reg));
memset(&flag_reg,0,sizeof(flag_reg));
ret = abrtc_read(ABRTC_SECONDS_REG,(uint8_t*)&sec_reg,sizeof(sec_reg));
ret |= abrtc_read(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
ret |= abrtc_read(ABRTC_MONTH_ALARM_REG,(uint8_t*)&alarm_reg,sizeof(alarm_reg));
if(alarm_reg.clk_out_en != clk_out_disable)
{
alarm_reg.clk_out_en = clk_out_disable;
ret |= abrtc_write(ABRTC_MONTH_ALARM_REG,(uint8_t*)&alarm_reg,sizeof(alarm_reg));
}
if(ret == 0)
{
if( (sec_reg.os == osc_is_enabled) & (flag_reg.of == oscilator_failure_not_detected) )
{
*osc_does_not_stopped = 1;
}
else
{
*osc_does_not_stopped = 0;
flag_reg.of = oscilator_failure_not_detected;
ret |= abrtc_write(ABRTC_FLAGS_REG,(uint8_t*)&flag_reg,sizeof(flag_reg));
}
}
Twi1_Disable();
return ret;
}
uint32_t abrtc_write(uint8_t reg, uint8_t* val, uint16_t len)
{
uint32_t ret = 0;
ret = TWI1_Write_Gen(ABRTC_ADDR,reg,val,len);
return ret;
}
uint32_t abrtc_read(uint8_t reg, uint8_t* val, uint16_t len)
{
uint32_t ret = 0;
ret = TWI1_Read_Gen(ABRTC_ADDR,reg,val,len);
return ret;
}