void
i2c_at24mac_read(char *buf, uint8_t eui64)
{
if(eui64) {
i2c_read_mem(I2C_AT24MAC_ADDR, 0x98, (uint8_t *)buf, 8);
}
/* 128bit unique serial number */
else {
i2c_read_mem(I2C_AT24MAC_ADDR, 0x80, (uint8_t *)buf, 16);
}
}
uint8_t ds1338_get_date_time(struct date_time * date_time)
{
/* Receive all registers from ds1338 except format register */
uint8_t ret = i2c_read_mem(DS1338_I2C_ADDR,0,(uint8_t*)date_time,sizeof(*date_time)-1);
if(ret)
{
return ret;
}
/* convert ds1338 time format to RTC time format */
if(date_time->hours&&(1<<DS1338_TIME_FORMAT))
{
/* 12h time format */
/* clear 12/24h bit in hours byte */
date_time->hours &= ~(1<<DS1338_TIME_FORMAT);
/* set proper bit in format byte */
date_time->format |= (1<<RTC_FORMAT_12_24);
/* check AM/PM */
if(date_time->hours&&(1<<DS1338_TIME_PM_AM))
{
/* if PM clear proper bit in rtc format byte */
date_time->format &= ~(1<<RTC_FORMAT_AM_PM);
}
else
{
/* if AM set proper bit in rtc format byte */
date_time->format |= (1<<RTC_FORMAT_AM_PM);
}
/* clear AM/PM bit in hours byte */
date_time->hours &= ~(1<<DS1338_TIME_PM_AM);
}
return 0;
}
uint8_t ds1338_start_stop(uint8_t start)
{
uint8_t sec;
uint8_t ret;
/* read CH's register */
ret = i2c_read_mem(DS1338_I2C_ADDR,DS1338_REG_CLOCK_HALT,&sec,1);
if(ret) return ret;
/* set or clear CH bit*/
if(start)
{
sec &= ~(1<<DS1338_CLOCK_HALT);
}
else
{
sec |= (1<<DS1338_CLOCK_HALT);
}
/* write CH's register */
return i2c_write_mem(DS1338_I2C_ADDR,DS1338_REG_CLOCK_HALT,&sec,1);
}
uint8_t ds1338_set_format(uint8_t format)
{
uint8_t sec;
uint8_t ret;
/* read time format register */
ret = i2c_read_mem(DS1338_I2C_ADDR,DS1338_REG_TIME_FORMAT,&sec,1);
if(ret)
{
return ret;
}
/* set time format register */
if(format&(1<<RTC_FORMAT_12_24))
{
sec |= (1<<DS1338_TIME_FORMAT);
}
else
{
sec &= ~(1<<DS1338_TIME_FORMAT);
}
/* write time format register */
return i2c_write_mem(DS1338_I2C_ADDR,DS1338_REG_TIME_FORMAT,&sec,1);
}