Diff: main.cpp

Revision:

3:7dcce0aa2535

Parent:

2:f33d74cebc4c

--- a/main.cpp	Sun Dec 12 01:07:29 2010 +0000
+++ b/main.cpp	Fri Aug 05 14:43:18 2011 +0000
@@ -1,161 +1,126 @@
-#include "mbed.h"
-
-// rudimentary driving of a 20T202DA2JA vacuum fluorescent display, 20 chars x 2 lines
-// display has 5 pins
-// 1 - green - GND
-// 2 - yellow - Vcc
-// 3 - orange - SIO - serial data - MOSI - p5
-// 4 - red - /STB - active low device select - p10
-// 5 - brown - SCK - serial clock - sclk - p7
-
-// Also, I have fitted a battery on my breadboard to the RTC, to keep the time across power downs.
-
-// VFD
-SPI spi(p5, p6, p7); // mosi, miso, sclk (miso not used by display)
-DigitalOut cs(p10); // chip select (active low)
-
-// button (push)
-DigitalIn set_the_time_button (p11); // “set the time” button (active low, pullup resistor)
-
-void DATA(unsigned char displaying) {
-    // Select the device by setting chip select low
-    cs = 0;
-    spi.write(0xfa);
-    spi.write(displaying);
-    // Deselect the device
-    cs = 1;
-}
-
-void COM(unsigned char telling) {
-    // Select the device by setting chip select low
-    cs = 0;
-    spi.write(0xf8);
-    spi.write(telling);
-    // Deselect the device
-    cs = 1;
-}
-
-void INITIALISE_DISPLAY() {
-    COM(0x01); //clear all display and set DD-RAM address 0 in address counter
-    COM(0x02); //move cursor to the original position
-    COM(0x06); //set the cursor direction increment and cursor shift enabled
-    COM(0x38); //set 8bit operation,2 line display and 100% brightness level
-    COM(0x80); //set cursor to the first position of 1st line
-    COM(0x0c); //set display on,cursor on,blinking off
-}
-
-tm ASK_FOR_THE_TIME(struct tm t) {
-    // get the current time from the terminal by asking the user to enter
-    // unfortunately, there's no echo back, so they can't see what they type
-
-    //year
-    printf("Enter year:\n"); // ask to enter year
-    printf("YYYY[enter]\n"); // as YYYY
-    scanf("%d", &t.tm_year); // put the typing into here
-
-    //month
-    printf("Enter month:\n"); // ask to enter month
-    printf("MM[enter]\n"); // as MM
-    scanf("%d", &t.tm_mon); // put the typing into here
-
-    //date
-    printf("Enter date:\n"); // ask to enter date
-    printf("DD[enter]\n"); // as DD
-    scanf("%d", &t.tm_mday); // put the typing into here
-
-    //hours
-    printf("Enter hours:\n"); // ask to enter hours
-    printf("HH[enter]\n"); // as HH
-    scanf("%d", &t.tm_hour); // put the typing into here
-
-    //minutes
-    printf("Enter minutes:\n"); // ask to enter minutes
-    printf("MM[enter]\n"); // as MM
-    scanf("%d", &t.tm_min); // put the typing into here
-
-    //seconds
-    printf("Enter seconds:\n"); // ask to enter seconds
-    printf("SS[enter]\n"); // as SS
-    scanf("%d", &t.tm_sec); // put the typing into here
-
-    // adjust for tm structure required values
-    t.tm_year = t.tm_year - 1900;
-    t.tm_mon = t.tm_mon - 1;
-
-    // set the time
-    set_time(mktime(&t));
-    //set_time(1289676600);  // Set RTC time to Sat, 13 Nov 2010 19:30:00 in case of testing
-
-    return t;
-
-}
-// spare display testing string
-// char theString[41] = {"20T202DA2JA VFD driven by mbed using SPI"}; // forty characters max
-char timeStringTop[21], timeStringBottom1[3], timeStringBottom2[17]; // string to put the time representation into
-
-char day_suffix[3] =  "th"; // suffix string for days like 1st 2nd 3rd
-char first[3]= "st", second[3] = "nd", third[3] = "rd"; // holding strings for the suffixes
-
-int main() {
-    // Setup the spi for 8 bit data, high steady state clock,
-    // second edge capture, with a 1MHz clock rate
-    spi.format(8,3); // set SPI mode
-    spi.frequency(1000000);
-
-    INITIALISE_DISPLAY(); // call the function that initialises the VFD
-
-    while (1) {
-        struct tm t;
-
-        if (set_the_time_button == false) {
-            ASK_FOR_THE_TIME(t);
-        }
-
-        time_t rtc_seconds = time(NULL); // somehow gets the current amount of seconds, evah!
-
-        int i = 0; // initalise the character steppers
-
-        // build the two lines of the display separately
-        strftime(timeStringTop, 20, "%X %A %p  ", localtime(&rtc_seconds)); // put the hours:minutes:seconds, then full day, then am/pm
-
-        COM(0x80); // first line
-        for (i=0; i<20; i++) {
-            DATA(timeStringTop[i]); // step through the top line
-        }
-
-        // this builds the second line in three pieces
-        strftime(timeStringBottom1, 2, "%e", localtime(&rtc_seconds)); // put the date in
-        strftime(timeStringBottom2, 16, " %B %Y  ", localtime(&rtc_seconds)); // put a space then the full month then the year then spaces
-
-        // first do a quick check to see if our date needs a 'st'; 'nd'; 'rd' or 'th' suffix
-        if ((t.tm_mday < 10) | (t.tm_mday > 20)) { // if the date is below the 10th or above the 20th
-            switch (t.tm_mday%10) {
-                case 1:
-                    strcpy (day_suffix,first); // is it a day that needs a "st"?
-                    break;
-                case 2:
-                    strcpy (day_suffix,second); // is it a day that needs a "nd"
-                    break;
-                case 3:
-                    strcpy (day_suffix,third); // is it a day that needs a "rd"
-                    break;
-                default:
-                    break; // leave 'day_suffix' saying "th" then.
-            }
-        }
-
-        COM(0xc0); // second line
-        for (i=0; i<2; i++) {
-            DATA(timeStringBottom1[i]); // step through the first part of the bottom line
-        }
-        for (i=0; i<2; i++) {
-            DATA(day_suffix[i]); // then add the day suffix
-        }
-        for (i=0; i<17; i++) {
-            DATA(timeStringBottom2[i]); // finish stepping through the bottom line
-        }
-
-        wait(1);
-    }
-
+#include "mbed.h"
+#include "EthernetNetIf.h" // ethernet 
+#include "NTPClient.h" // Network Time Protocol client
+
+// rudimentary driving of a 20T202DA2JA vacuum fluorescent display, 20 chars x 2 lines
+// display has 5 pins
+// 1 - green - GND
+// 2 - yellow - Vcc
+// 3 - orange - SIO - serial data - MOSI - p5
+// 4 - red - /STB - active low device select - p10
+// 5 - brown - SCK - serial clock - sclk - p7
+
+// Also, I have fitted a battery on my breadboard to the RTC, to keep the time across power downs.
+
+// VFD
+SPI spi(p5, p6, p7); // mosi, miso, sclk (miso not used by display)
+DigitalOut cs(p10); // chip select (active low)
+
+// alternatively, look on the ethernet interface to find an NTP server and set the time from that.
+EthernetNetIf eth; // instantiate an ethernet connection
+NTPClient ntp; // instantiate an NTP client
+
+// summertime
+int summertime = true; // if this is true, then it's summer!
+
+void DATA(unsigned char displaying) {
+    // Select the device by setting chip select low
+    cs = 0;
+    spi.write(0xfa);
+    spi.write(displaying);
+    // Deselect the device
+    cs = 1;
+}
+
+void COM(unsigned char telling) {
+    // Select the device by setting chip select low
+    cs = 0;
+    spi.write(0xf8);
+    spi.write(telling);
+    // Deselect the device
+    cs = 1;
+}
+
+int i = 0; // initalise the character steppers
+
+void INITIALISE_DISPLAY() {
+    COM(0x01); //clear all display and set DD-RAM address 0 in address counter
+    COM(0x02); //move cursor to the original position
+    COM(0x06); //set the cursor direction increment and cursor shift enabled
+    COM(0x38); //set 8bit operation,2 line display and 100% brightness level
+    COM(0x80); //set cursor to the first position of 1st line
+    COM(0x0c); //set display on,cursor on,blinking off
+}
+
+void printVFDLine1(char statusString[21]) {
+    COM(0x80); // first line
+    for (i=0; i<20; i++) {
+        DATA(statusString[i]); // step through the top line
+    }
+}
+
+void printVFDLine2(char statusString[21]) {
+    COM(0xc0); // second line
+    for (i=0; i<20; i++) {
+        DATA(statusString[i]); // step through the first part of the bottom line
+    }
+}
+
+char timeStringTop[21]; // used with the NTP code in the first line display code
+char timeStringBottom[21]; // used with the NTP code in the second line display code
+char statusString[41]; // place to put startup status text, etc
+
+int main() {
+    // Setup the spi for 8 bit data, high steady state clock,
+    // second edge capture, with a 1MHz clock rate
+    spi.format(8,3); // set SPI mode
+    spi.frequency(1000000);
+
+    // Ethernet and NTP stuff begins (from http://mbed.org/cookbook/NTP-Client )
+    INITIALISE_DISPLAY();
+    char statusString1[21] = "Start               ";
+    printVFDLine1(statusString1);
+    char statusString2[21] = "Setting up...       ";
+    printVFDLine2(statusString2);
+
+    EthernetErr ethErr = eth.setup();
+    if (ethErr) {
+        printf("Error %d in setup.\n\r", ethErr);
+
+        char statusString3[21] = "Error %d in setup.\n\r";
+        printVFDLine1(statusString3);
+        return -1;
+    }
+
+    Host server(IpAddr(), 123, "0.uk.pool.ntp.org");
+    ntp.setTime(server);
+
+    char statusString4[21] = "0.uk.pool.ntp.org   ";
+    printVFDLine1(statusString4);
+    char statusString5[21] = "Setup OK            ";
+    printVFDLine2(statusString5);
+
+    // end of Ethernet and NTP stuff
+
+    INITIALISE_DISPLAY(); // call the function that initialises the VFD
+
+    while (1) {
+
+        time_t rtc_seconds = time(NULL); // somehow gets the current amount of seconds, evah!
+
+        if (summertime) { // if the summertime variable is true, we add 3600 seconds to rtc_seconds
+            rtc_seconds = rtc_seconds + 3600;
+        }
+
+        // build the two lines of the display separately
+        strftime(timeStringTop, 21, "%a %d %b %T ", localtime(&rtc_seconds)); // put the hours:minutes:seconds, then full day, then am/pm
+        printVFDLine1(timeStringTop);
+
+        //  char thingStringBottom[21] = "This is a blank line";
+        //  printVFDLine2(thingStringBottom);
+
+        wait(1);
+
+    }
+
 }
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