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#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/i2c.h"
#include "hardware/rtc.h"
#include "pico/util/datetime.h"
#include "oled/ss_oled.h"
// To modify the I2C port used, change the `#define I2C_PORT` in "oled/BitBang_I2C.c"
// Pin numbers are GPIO pins.
#define SDA_PIN 6
#define SCL_PIN 7
#define RESET_PIN -1
#define OLED_DEFAULT_CONTRAST 40
SSOLED oled;
// Unused but useful for reference:
#define OLED_WIDTH 128
#define OLED_HEIGHT 64
void init_display() {
oledInit(&oled, OLED_128x64, 0x3d, 0, 0, 1, SDA_PIN, SCL_PIN, RESET_PIN, 1000000L);
oledFill(&oled, 0,1);
oledSetContrast(&oled, OLED_DEFAULT_CONTRAST);
//oledSetTextWrap(&oled, true);
}
void init_rtc() {
datetime_t init_date = {
.year = 2020,
.month = 06,
.day = 05,
.dotw = 5, // 0 is Sunday, so 5 is Friday
.hour = 15,
.min = 45,
.sec = 00 };
rtc_init();
rtc_set_datetime(&init_date);
}
// Time as string
// Adapted from pico-sdk/scr/common/pico_util/datetime.c
void time_as_str(char *buf, uint buf_size, const datetime_t *t) {
snprintf(buf,
buf_size,
"%d:%02d:%02d",
t->hour,
t->min,
t->sec);
};
void date_as_str(char *buf, uint buf_size, const datetime_t *t) {
static const char *DATETIME_DOWS[7] = {
"Sun",
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
};
snprintf(buf,
buf_size,
"%02d-%02d-%02d %s",
t->year,
t->month,
t->day,
DATETIME_DOWS[t->dotw - 1]);
};
void show_datetime() {
char datetime_buf[256];
char *datetime_str = &datetime_buf[0];
datetime_t t;
rtc_get_datetime(&t);
// time
time_as_str(datetime_str, sizeof(datetime_buf), &t);
oledWriteString(&oled, 0,10,3, datetime_str, FONT_12x16, 0, 1);
// date
date_as_str(datetime_str, sizeof(datetime_buf), &t);
oledWriteString(&oled, 0,0,7, datetime_str, FONT_8x8, 0, 1);
}
int main() {
stdio_init_all();
init_display();
init_rtc();
oledWriteString(&oled, 0,15,0, (char *)"Test clock", FONT_8x8, 0, 1);
while (1) {
show_datetime();
sleep_ms(500);
}
return 0;
}
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