Hi,
I am trying to hack together 2 libraries to create a Countdown display and clock. I am using MD_Parola and Chronos and can't seem to put a uint32_t into a char array.
Code below, issue is around line 179, I have tried using sprintf but I don't know what I am doing. Been playing around casually for years but never really delved in and learned how to do this stuff, now I am trying but am completely lost.
Ignore my ignorance if it is a very simple fix but I can't see the wood for the trees.
// Program to demonstrate the MD_Parola library
//
// Display the time in one zone and other information scrolling through in
// another zone.
// - Time is shown in a user defined fixed width font
// - Scrolling text uses the default font
// - Temperature display uses user defined characters
// - Optional use of DS1307 module for time and DHT11 sensor for temp and humidity
// - DS1307 library (MD_DS1307) found at http://arduinocode.codeplex.com
// - DHT11 library (DHT11_lib) found at http://arduino.cc/playground/Main/DHT11Lib
//
// Use the DHT11 temp and humidity sensor
#define USE_DHT11 0
// Use the DS1307 clock module
#define USE_DS1307 1
// Header file includes
#include <Time.h>
#include <Chronos.h>
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#if USE_LIBRARY_SPI
#include <SPI.h>
#endif
#include "Font_Data.h"
// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define MAX_DEVICES 8
#define CLK_PIN 13
#define DATA_PIN 11
#define CS_PIN 10
#define SECONDSINDAY 86400
#define SECONDSINHOUR 3600
#define SECONDSINMINUTE 60
#if USE_DHT11
#include <dht11.h>
#define DHT11_PIN 2
dht11 DHT11;
#endif
#if USE_DS1307
#include <MD_DS1307.h>
#include <Wire.h>
#endif
// Hardware SPI connection
MD_Parola P = MD_Parola(CS_PIN, MAX_DEVICES);
// Arbitrary output pins
// MD_Parola P = MD_Parola(DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
#define SPEED_TIME 75
#define PAUSE_TIME 0
#define MAX_MESG 20
// Turn on debug statements to the serial output
#define DEBUG 0
// Global variables
char szTime[9]; // mm:ss\0
char szMesg[MAX_MESG+1] = "";
uint8_t degC[] = { 6, 3, 3, 56, 68, 68, 68 }; // Deg C
uint8_t degF[] = { 6, 3, 3, 124, 20, 20, 4 }; // Deg F
char *mon2str(uint8_t mon, char *psz, uint8_t len)
// Get a label from PROGMEM into a char array
{
static const __FlashStringHelper* str[] =
{
F("Jan"), F("Feb"), F("Mar"), F("Apr"),
F("May"), F("Jun"), F("Jul"), F("Aug"),
F("Sep"), F("Oct"), F("Nov"), F("Dec")
};
strncpy_P(psz, (const char PROGMEM *)str[mon-1], len);
psz[len] = '\0';
return(psz);
}
char *dow2str(uint8_t code, char *psz, uint8_t len)
{
static const __FlashStringHelper* str[] =
{
F("Sunday"), F("Monday"), F("Tuesday"),
F("Wednesday"), F("Thursday"), F("Friday"),
F("Saturday")
};
strncpy_P(psz, (const char PROGMEM *)str[code-1], len);
psz[len] = '\0';
return(psz);
}
void getTime(char *psz, bool f = true)
// Code for reading clock time
{
#if USE_DS1307
RTC.readTime();
sprintf(psz, "%02d%c%02d", RTC.h, (f ? ':' : ' '), RTC.m);
#else
uint16_t h, m, s;
s = millis()/1000;
m = s/60;
h = m/60;
m %= 60;
s %= 60;
sprintf(psz, "%02d%c%02d", h, (f ? ':' : ' '), m);
#endif
}
void getDate(char *psz)
// Code for reading clock date
{
#if USE_DS1307
char szBuf[10];
RTC.readTime();
sprintf(psz, "%d %s %04d", RTC.dd, mon2str(RTC.mm, szBuf, sizeof(szBuf)-1), RTC.yyyy);
#else
strcpy(szMesg, "29 Feb 2016");
#endif
}
void setup(void)
{
P.begin(2);
P.setInvert(false);
P.setZone(0, 0, MAX_DEVICES-5);
P.setZone(1, MAX_DEVICES-4, MAX_DEVICES-1);
P.setFont(1, numeric7Seg);
P.displayZoneText(1, szTime, CENTER, SPEED_TIME, PAUSE_TIME, PRINT, NO_EFFECT);
P.displayZoneText(0, szMesg, CENTER, SPEED_TIME, 0, SCROLL_LEFT, SCROLL_LEFT);
#if USE_DS1307
RTC.control(DS1307_CLOCK_HALT, DS1307_OFF);
RTC.control(DS1307_12H, DS1307_OFF);
#endif
getTime(szTime);
}
void loop(void)
{
static uint32_t lastTime = 0; // millis() memory
static uint8_t display = 0; // current display mode
static bool flasher = false; // seconds passing flasher
P.displayAnimate();
if (P.getZoneStatus(0))
{
switch (display)
{
case 0: // Days until
Chronos::DateTime targetDateTime(2016,4,25,20,00,00);
RTC.readTime();
Chronos::DateTime curDateTime(RTC.yyyy, RTC.mm, RTC.dd, RTC.h, RTC.m, RTC.s);
Chronos::Span::Absolute timeDiff = targetDateTime - curDateTime;
P.setTextEffect(0,SCROLL_LEFT,SCROLL_LEFT);
//strcpy(szMesg, timeDiff.days());
sprintf(szMesg, "%04" PRIu32, timeDiff.days());
display++;
break;
case 1: // day of week
P.setTextEffect(0, SCROLL_LEFT, SCROLL_LEFT);
display++;
dow2str(RTC.dow, szMesg, MAX_MESG);
break;
default: // Calendar
P.setTextEffect(0, SCROLL_LEFT, SCROLL_LEFT);
display = 0;
getDate(szMesg);
break;
}
P.displayReset(0);
}
// Finally, adjust the time string if we have to
if (millis() - lastTime >= 1000)
{
lastTime = millis();
getTime(szTime, flasher);
flasher = !flasher;
P.displayReset(1);
}
}