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The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time 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 an AM/PM indicator.Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1μW.
LibDriver DS1302 is a full function driver of ds1302 launched by LibDriver.It provides time reading, ram reading or writing and other functions. LibDriver is MISRA compliant.
/src includes LibDriver DS1302 source files.
/interface includes LibDriver DS1302 GPIO platform independent template.
/test includes LibDriver DS1302 driver test code and this code can test the chip necessary function simply.
/example includes LibDriver DS1302 sample code.
/doc includes LibDriver DS1302 offline document.
/datasheet includes DS1302 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 GPIO platform independent template and finish your platform GPIO driver.
Add the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.
You can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.
#include "driver_ds1302_basic.h"
uint8_t res;
uint8_t addr = 0x00;
uint8_t data = 0x00;
uint32_t t = 0;
char time_buffer[32];
/* basic init */
res = ds1302_basic_init();
if (res != 0)
{
return 1;
}
/* set time zone */
res = ds1302_basic_set_timestamp_time_zone(8);
if (res != 0)
{
(void)ds1302_basic_deinit();
return 1;
}
...
/* set timestamp */
res = ds1302_basic_set_timestamp(t);
if (res != 0)
{
(void)ds1302_basic_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("set timestamp %d.\n", t);
...
/* set timestamp */
memset(time_buffer, 0, sizeof(char) * 32);
res = ds1302_basic_get_ascii_time(time_buffer, 32);
if (res != 0)
{
(void)ds1302_basic_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print(time_buffer);
...
/* write ram */
res = ds1302_basic_write_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1302_basic_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("write ram addr 0x%02X data 0x%02X.\n", addr, data);
...
/* read ram */
res = ds1302_basic_read_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1302_basic_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("read ram addr 0x%02X data 0x%02X.\n", addr, data);
...
(void)ds1302_basic_deinit();
return 0;#include "driver_ds1302_advance.h"
uint8_t res;
uint8_t i;
uint8_t addr = 0x00;
uint8_t data = 0x00;
uint32_t t = 0;
uint8_t burst_buffer[31];
char time_buffer[32];
/* advance init */
res = ds1302_advance_init();
if (res != 0)
{
return 1;
}
/* set time zone */
res = ds1302_advance_set_timestamp_time_zone(8);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
/* set timestamp */
res = ds1302_advance_set_timestamp(t);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("set timestamp %d.\n", t);
...
/* set timestamp */
memset(time_buffer, 0, sizeof(char) * 32);
res = ds1302_advance_get_ascii_time(time_buffer, 32);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print(time_buffer);
...
/* write ram */
res = ds1302_advance_write_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("write ram addr 0x%02X data 0x%02X.\n", addr, data);
...
/* read ram */
res = ds1302_advance_read_ram(addr, &data, 1);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
/* output */
ds1302_interface_debug_print("read ram addr 0x%02X data 0x%02X.\n", addr, data);
...
/* set charge */
res = ds1302_advance_set_charge(DS1302_CHARGE_DISABLE);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
...
res = ds1302_advance_burst_write(DS1302_BURST_TYPE_RAM, burst_buffer, 31);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
ds1302_interface_debug_print("ram burst write: ");
for (i = 0; i < 31; i++)
{
ds1302_interface_debug_print("0x%02X ", burst_buffer[i]);
}
...
res = ds1302_advance_burst_read(DS1302_BURST_TYPE_RAM, burst_buffer, 31);
if (res != 0)
{
(void)ds1302_advance_deinit();
return 1;
}
ds1302_interface_debug_print("ram burst read: ");
for (i = 0; i < 31; i++)
{
ds1302_interface_debug_print("0x%02X ", burst_buffer[i]);
}
...
(void)ds1302_advance_deinit();
return 0;Online documents: https://www.libdriver.com/docs/ds1302/index.html.
Offline documents: /doc/html/index.html.
Please refer to CONTRIBUTING.md.
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