Hello. I have had some trouble compiling the NWatch firmware. I have set up the libraries and they all work fine. Can someone help me out what I am doing wrong here? Here is the whole error:
Arduino: 1.8.10 (Mac OS X), Board: "Arduino Leonardo"
/var/folders/rc/hpl1rsgd2h7bg45b04my1c280000gn/T//ccoFxOvs.ltrans0.ltrans.o: In function `oled_flush':
sketch/oled.c:108: undefined reference to `spi_transfer_nr'
sketch/oled.c:109: undefined reference to `spi_transfer_nr'
sketch/oled.c:110: undefined reference to `spi_transfer_nr'
sketch/oled.c:112: undefined reference to `spi_transfer_nr'
sketch/oled.c:113: undefined reference to `spi_transfer_nr'
/var/folders/rc/hpl1rsgd2h7bg45b04my1c280000gn/T//ccoFxOvs.ltrans0.ltrans.o:sketch/oled.c:114: more undefined references to `spi_transfer_nr' follow
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Leonardo.
For the time I was not able to upload the firmware, I have been working on my own software, and after the battery of the watch has died, the real-time clock has fallen behind for the amount of time that the watch was uncharged. How can I fix this issue? Can I fix it by a few lines of code, do I have to do a full restart on the watch, or do I have to recalibrate it manually? Here is my code:
#include <SPI.h>
#include <Wire.h>
//timer
#include "RTClib.h"
//oled
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_DC A3
#define OLED_CS A5
#define OLED_RESET A4
Adafruit_SSD1306 oled(OLED_DC, OLED_RESET, OLED_CS);
#define BUTTON_1 10
#define BUTTON_2 8
#define BUTTON_3 11
//timer instance
RTC_DS3231 rtc;
int display_count = 0;
//battery indicator variables
float percent = 0;
float prev_percent = -1;
static byte bPin = A11;
static byte battEn = 4;
float R1 = 10000;
float R2 = 10000;
float voltage;
float vDivider = (R2 / (R1 + R2));
//time and date variables
DateTime now;
DateTime prev_time;
int charPixel = 12; //for double sized text on the display
int offset = (128 - charPixel * 8)/2;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void setup() {
// put your setup code here, to run once:
pinMode(BUTTON_1, INPUT_PULLUP);
pinMode(BUTTON_2, INPUT_PULLUP);
pinMode(BUTTON_3, INPUT_PULLUP);
Serial.begin(9600);
oled_setup();
delay(3000);
timer_setup();
prev_time = rtc.now();
now = prev_time;
display_current_time();
display_current_date(true);
}
void loop() {
if (display_count < 10){
display_battery();
display_date();
display_time();
}
if (digitalRead(BUTTON_1) == LOW || digitalRead(BUTTON_2) == LOW || digitalRead(BUTTON_3) == LOW){
prev_time = rtc.now();
now = prev_time;
prev_percent = 0;
display_battery();
display_current_time();
display_current_date(true);
display_count = 0;
oled.display();
}
}
void oled_setup(){
oled.begin();
oled.clearDisplay();
}
void timer_setup(){
rtc.begin();
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, lets set the time!");
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
}
void display_time(){
now = rtc.now();
if(display_count < 10 && prev_time.hour() != now.hour()){
oled.setTextSize(2);
oled.setCursor(offset, 32 - 6);
oled.setTextColor(BLACK);
print_double_digit(prev_time.hour());
oled.print(":");
print_double_digit(prev_time.minute());
oled.print(":");
print_double_digit(prev_time.second());
oled.display();
display_current_time();
if (++display_count >= 10){
clear_display();
}
prev_time = now;
}else if(display_count < 10 && prev_time.minute() != now.minute()){
oled.setTextSize(2);
oled.setCursor(36 + offset, 32 - 6);
oled.setTextColor(BLACK);
print_double_digit(prev_time.minute());
oled.print(":");
print_double_digit(prev_time.second());
oled.display();
display_current_time();
if (++display_count >= 10){
clear_display();
}
prev_time = now;
} else if(display_count < 10 && prev_time.second() != now.second()){
oled.setTextSize(2);
oled.setCursor(72 + offset, 32 - 6);
oled.setTextColor(BLACK);
print_double_digit(prev_time.second());
oled.display();
display_current_time();
if (++display_count >= 10){
clear_display();
}
prev_time = now;
}
}
void display_current_time(){
oled.setTextSize(2);
oled.setCursor(offset, 32 - 6);
oled.setTextColor(WHITE);
print_double_digit(now.hour());
oled.print(":");
print_double_digit(now.minute());
oled.print(":");
print_double_digit(now.second());
oled.display();
}
void display_battery(){
digitalWrite(battEn, HIGH);
delay(50);
voltage = analogRead(bPin);
voltage = (voltage / 1024) * 3.35;
voltage = voltage / vDivider;
delay(50);
digitalWrite(battEn, LOW);
if (voltage > 4.2){
percent = 100;
}else if(voltage < 3.0){
percent = 0;
}else{
percent = (((voltage - 3.0) / 1.2)) * 100;
}
if (prev_percent + 0.7 < percent || prev_percent - 0.7 > percent){
oled.setTextSize(1);
oled.setCursor(0, 0);
oled.setTextColor(BLACK);
oled.print((int)ceil(prev_percent));
oled.print("%");
oled.display();
oled.setCursor(0, 0);
oled.setTextColor(WHITE);
oled.print((int)ceil(percent));
oled.print("%");
oled.display();
prev_percent = percent;
}
}
void display_date(){
if (prev_time.day() != now.day() || prev_time.month() || prev_time.year() != now.year()){
display_current_date(false);
display_current_date(true);
}
}
void display_current_date(bool white){
oled.setTextSize(1);
DateTime date;
if (white){
oled.setTextColor(WHITE);
date = now;
}else{
oled.setTextColor(BLACK);
date = prev_time;
}
oled.setCursor(0, 56);
print_double_digit(date.day());
oled.print('/');
print_double_digit(date.month());
oled.print('/');
oled.print(date.year());
oled.print(" ");
oled.print(daysOfTheWeek[date.dayOfTheWeek()]);
}
void print_double_digit(int num){
if(num < 10){
oled.print("0");
}
oled.print(num);
}
void clear_display(){
oled.clearDisplay();
oled.display();
}
I would appreciate the help 