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This module is an I2C bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO. In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer function, time update interrupt function, and 32.768 kHz output function. The devices in this module are fabricated via a C-MOS process for low current consumption, which enables long-term battery back-up. All of these many functions are implemented in a SOP package.
LibDriver RX8025T is a full-featured driver for RX8025T, launched by LibDriver. It provides time reading, alarm, timer and additional features. LibDriver is MISRA compliant.
/src includes LibDriver RX8025T source files.
/interface includes LibDriver RX8025T IIC platform independent template.
/test includes LibDriver RX8025T driver test code and this code can test the chip necessary function simply.
/example includes LibDriver RX8025T sample code.
/doc includes LibDriver RX8025T offline document.
/datasheet includes RX8025T 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 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_rx8025t_basic.h"
uint8_t res;
uint8_t data;
rx8025t_time_t t;
uint32_t timestamp;
/* basic init */
res = rx8025t_basic_init();
if (res != 0)
{
return 1;
}
...
/* set the zone */
res = rx8025t_basic_set_timestamp_time_zone(8);
if (res != 0)
{
(void)rx8025t_basic_deinit();
return 1;
}
/* set time */
res = rx8025t_basic_set_timestamp((time_t)timestamp);
if (res != 0)
{
(void)rx8025t_basic_deinit();
return 1;
}
/* output */
rx8025t_interface_debug_print("rx8025t: set timestamp %d.\n", (time_t)timestamp);
...
/* basic get time */
res = rx8025t_basic_get_time(&t);
if (res != 0)
{
(void)rx8025t_basic_deinit();
return 1;
}
/* output */
rx8025t_interface_debug_print("rx8025t: %04d-%02d-%02d %02d:%02d:%02d %d.\n",
t.year, t.month, t.date,
t.hour, t.minute, t.second, t.week
);
...
/* write ram */
res = rx8025t_basic_write_ram(data);
if (res != 0)
{
(void)rx8025t_basic_deinit();
return 1;
}
/* output */
rx8025t_interface_debug_print("rx8025t: ram write 0x%02X.\n", data);
...
/* read ram */
res = rx8025t_basic_read_ram(&data);
if (res != 0)
{
(void)rx8025t_basic_deinit();
return 1;
}
/* output */
rx8025t_interface_debug_print("rx8025t: ram read 0x%02X.\n", data);
...
/* basic deinit */
(void)rx8025t_basic_deinit();
return 0;#include "driver_rx8025t_alarm.h"
uint8_t res;
static uint8_t gs_flag;
uint8_t (*g_gpio_irq)(void) = NULL;
uint8_t date = 0x00;
uint8_t hour = 0x00;
uint8_t minute = 0x00;
uint8_t weekday = 0x01;
uint32_t timeout = 60;
rx8025t_bool_t date_weekday_mask = RX8025T_BOOL_TRUE;
rx8025t_bool_t hour_mask = RX8025T_BOOL_TRUE;
rx8025t_bool_t minute_mask = RX8025T_BOOL_TRUE;
rx8025t_alarm_t date_week = RX8025T_ALARM_DAY;
static void a_alarm_callback(uint8_t type)
{
switch (type)
{
case RX8025T_STATUS_UPDATE :
{
break;
}
case RX8025T_STATUS_TIMER :
{
break;
}
case RX8025T_STATUS_ALARM :
{
rx8025t_interface_debug_print("rx8025t: irq alarm.\n");
gs_flag = 1;
break;
}
case RX8025T_STATUS_VOLTAGE_LOW :
{
rx8025t_interface_debug_print("rx8025t: irq voltage low.\n");
break;
}
case RX8025T_STATUS_VOLTAGE_DETECTION :
{
rx8025t_interface_debug_print("rx8025t: irq voltage detection.\n");
break;
}
default :
{
rx8025t_interface_debug_print("rx8025t: unknown code.\n");
break;
}
}
}
/* alarm init */
res = rx8025t_alarm_init(a_alarm_callback);
if (res != 0)
{
return 1;
}
...
/* alarm config */
res = rx8025t_alarm_config(minute, hour, date_week, date, weekday,
minute_mask, hour_mask, date_weekday_mask);
if (res != 0)
{
(void)rx8025t_alarm_deinit();
return 1;
}
/* output */
rx8025t_interface_debug_print("rx8025t: alarm minute is %d.\n", minute);
rx8025t_interface_debug_print("rx8025t: alarm hour is %d.\n", hour);
rx8025t_interface_debug_print("rx8025t: alarm date is %d.\n", date);
rx8025t_interface_debug_print("rx8025t: alarm weekday is %d.\n", weekday);
if (date_week == RX8025T_ALARM_DAY)
{
rx8025t_interface_debug_print("rx8025t: alarm date mode.\n");
}
else
{
rx8025t_interface_debug_print("rx8025t: alarm week mode.\n");
}
rx8025t_interface_debug_print("rx8025t: alarm minute mask is %s.\n", (minute_mask == RX8025T_BOOL_TRUE) ? "true" : "false");
rx8025t_interface_debug_print("rx8025t: alarm hour mask is %s.\n", (hour_mask == RX8025T_BOOL_TRUE) ? "true" : "false");
rx8025t_interface_debug_print("rx8025t: alarm date weekday mask is %s.\n", (date_weekday_mask == RX8025T_BOOL_TRUE) ? "true" : "false");
...
/* interrupt init */
if (gpio_interrupt_init() != 0)
{
(void)rx8025t_alarm_deinit();
return 1;
}
g_gpio_irq = rx8025t_alarm_irq_handler;
...
/* output */
rx8025t_interface_debug_print("rx8025t: start alarm.\n");
/* init 0 */
gs_flag = 0;
/* running */
while (timeout != 0)
{
/* check flag */
if (gs_flag != 0)
{
break;
}
/* delay 1s */
rx8025t_interface_delay_ms(1000);
}
...
/* check timeout */
if (timeout != 0)
{
/* output */
rx8025t_interface_debug_print("rx8025t: end alarm.\n");
}
else
{
/* output */
rx8025t_interface_debug_print("rx8025t: timeout.\n");
}
...
/* alarm deinit */
(void)rx8025t_alarm_deinit();
(void)gpio_interrupt_deinit();
g_gpio_irq = NULL;
return 0;#include "driver_rx8025t_timer.h"
uint8_t res;
static uint8_t gs_flag;
uint8_t (*g_gpio_irq)(void) = NULL;
uint32_t t;
rx8025t_timer_clock_t clk = RX8025T_TIMER_CLOCK_4096_HZ;
uint16_t counter = 100;
static void a_timer_callback(uint8_t type)
{
switch (type)
{
case RX8025T_STATUS_UPDATE :
{
break;
}
case RX8025T_STATUS_TIMER :
{
rx8025t_interface_debug_print("rx8025t: irq timer.\n");
gs_flag = 1;
break;
}
case RX8025T_STATUS_ALARM :
{
break;
}
case RX8025T_STATUS_VOLTAGE_LOW :
{
rx8025t_interface_debug_print("rx8025t: irq voltage low.\n");
break;
}
case RX8025T_STATUS_VOLTAGE_DETECTION :
{
rx8025t_interface_debug_print("rx8025t: irq voltage detection.\n");
break;
}
default :
{
rx8025t_interface_debug_print("rx8025t: unknown code.\n");
break;
}
}
}
/* timer init */
res = rx8025t_timer_init(a_timer_callback);
if (res != 0)
{
return 1;
}
...
/* timer config */
res = rx8025t_timer_config(clk, counter);
if (res != 0)
{
(void)rx8025t_timer_deinit();
return 1;
}
...
/* output */
if (clk == RX8025T_TIMER_CLOCK_4096_HZ)
{
t = counter * 2 * 1;
/* output */
rx8025t_interface_debug_print("rx8025t: set clock 4096hz, counter %d.\n", counter);
}
else if (clk == RX8025T_TIMER_CLOCK_64_HZ)
{
t = counter * 2 * 16;
/* output */
rx8025t_interface_debug_print("rx8025t: set clock 64hz, counter %d.\n", counter);
}
else if (clk == RX8025T_TIMER_CLOCK_1_HZ)
{
t = counter * 2 * 1000;
/* output */
rx8025t_interface_debug_print("rx8025t: set clock 1hz, counter %d.\n", counter);
}
else
{
t = counter * 2 * 1000 * 60;
/* output */
rx8025t_interface_debug_print("rx8025t: set clock 1min, counter %d.\n", counter);
}
...
/* interrupt init */
if (gpio_interrupt_init() != 0)
{
(void)rx8025t_timer_deinit();
return 1;
}
g_gpio_irq = rx8025t_timer_irq_handler;
...
/* output */
rx8025t_interface_debug_print("rx8025t: start timer.\n");
/* start */
res = rx8025t_timer_start();
if (res != 0)
{
(void)rx8025t_timer_deinit();
(void)gpio_interrupt_deinit();
g_gpio_irq = NULL;
return 1;
}
...
/* init 0 */
gs_flag = 0;
while (t != 0)
{
/* check flag */
if (gs_flag != 0)
{
break;
}
/* delay 1ms */
rx8025t_interface_delay_ms(1);
/* t-- */
t--;
}
if (t != 0)
{
/* output */
rx8025t_interface_debug_print("rx8025t: end timer.\n");
}
else
{
/* output */
rx8025t_interface_debug_print("rx8025t: timeout.\n");
}
...
/* timer deinit */
(void)rx8025t_timer_stop();
(void)rx8025t_timer_deinit();
(void)gpio_interrupt_deinit();
g_gpio_irq = NULL;
return 0;Online documents: https://www.libdriver.com/docs/rx8025t/index.html.
Offline documents: /doc/html/index.html.
Please refer to CONTRIBUTING.md.
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