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The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.
LibDriver DS1307 is a full function driver of ds1307 launched by LibDriver.It provides time reading, square wave output and other functions. LibDriver is MISRA compliant.
/src includes LibDriver DS1307 source files.
/interface includes LibDriver DS1307 IIC platform independent template.
/test includes LibDriver DS1307 driver test code and this code can test the chip necessary function simply.
/example includes LibDriver DS1307 sample code.
/doc includes LibDriver DS1307 offline document.
/datasheet includes DS1307 datasheet.
/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.
/misra includes the LibDriver MISRA code scanning results.
Reference /interface IIC platform independent template and finish your platform IIC driver.
Add /src, /interface and /example to your project.
#include "driver_ds1307_basic.h"
uint8_t res;
uint8_t addr;
uint8_t data;
uint32_t t;
ds1307_time_t time;
/* basic init */
res = ds1307_basic_init();
if (res != 0)
{
return 1;
}
/* set the zone */
res = ds1307_basic_set_timestamp_time_zone(8);
if (res != 0)
{
(void)ds1307_basic_deinit();
return 1;
}
...
t = 1612686500;
/* set time */
res = ds1307_basic_set_timestamp((time_t)t);
if (res != 0)
{
(void)ds1307_basic_deinit();
return 1;
}
/* output */
ds1307_interface_debug_print("ds1307: set timestamp %d.\n", (time_t)t);
...
/* basic get time */
res = ds1307_basic_get_time(&time);
if (res != 0)
{
(void)ds1307_basic_deinit();
return 1;
}
/* output */
if (time.format == DS1307_FORMAT_24H)
{
ds1307_interface_debug_print("ds1307: %04d-%02d-%02d %02d:%02d:%02d %d.\n",
time.year, time.month, time.date,
time.hour, time.minute, time.second, time.week
);
}
else
{
ds1307_interface_debug_print("ds1307: %04d-%02d-%02d %s %02d:%02d:%02d %d.\n",
time.year, time.month, time.date, (time.am_pm == DS1307_AM) ? "AM" : "PM",
time.hour, time.minute, time.second, time.week
);
}
...
addr = 0;
data = 0x08;
/* write ram */
res = ds1307_basic_write_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1307_basic_deinit();
return 1;
}
/* output */
ds1307_interface_debug_print("ds1307: ram write addr %d 0x%02X.\n", addr, data);
/* read ram */
res = ds1307_basic_read_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1307_basic_deinit();
return 1;
}
/* output */
ds1307_interface_debug_print("ds1307: ram read addr %d 0x%02X.\n", addr, data);
...
/* basic deinit */
(void)ds1307_basic_deinit();
return 0;#include "driver_ds1307_output.h"
uint8_t res;
uint32_t t;
ds1307_time_t time;
/* output init */
res = ds1307_output_init();
if (res != 0)
{
return 1;
}
/* set the zone */
res = ds1307_output_set_timestamp_time_zone(8);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
...
t = 1612686500;
/* set time */
res = ds1307_output_set_timestamp((time_t)t);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
/* output */
ds1307_interface_debug_print("ds1307: set timestamp %d.\n", (time_t)t);
/* output get time */
res = ds1307_output_get_time(&time);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
/* output */
if (time.format == DS1307_FORMAT_24H)
{
ds1307_interface_debug_print("ds1307: %04d-%02d-%02d %02d:%02d:%02d %d.\n",
time.year, time.month, time.date,
time.hour, time.minute, time.second, time.week
);
}
else
{
ds1307_interface_debug_print("ds1307: %04d-%02d-%02d %s %02d:%02d:%02d %d.\n",
time.year, time.month, time.date, (time.am_pm == DS1307_AM) ? "AM" : "PM",
time.hour, time.minute, time.second, time.week
);
}
...
/* set mode */
res = ds1307_output_set_mode(DS1307_OUTPUT_MODE_LEVEL);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
/* set level */
res = ds1307_output_set_level(DS1307_OUTPUT_LEVEL_LOW);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
...
/* set mode */
res = ds1307_output_set_mode(DS1307_OUTPUT_MODE_SQUARE_WAVE);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
/* set freq */
res = ds1307_output_set_square_wave_frequency(DS1307_SQUARE_WAVE_FREQUENCY_1_HZ);
if (res != 0)
{
(void)ds1307_output_deinit();
return 1;
}
...
/* output deinit */
(void)ds1307_output_deinit();
return 0;Online documents: https://www.libdriver.com/docs/ds1307/index.html.
Offline documents: /doc/html/index.html.
Please refer to CONTRIBUTING.md.
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