Revision 0:a62a79548d00, committed 2011-03-01

Comitter:

suupen

Date:

Tue Mar 01 11:42:37 2011 +0000

Commit message:

Seven-Segment Numeric LED Display Dynamic drive sample program
http://www.youtube.com/watch?v=9f5sl4-In4U

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 01 11:42:37 2011 +0000
@@ -0,0 +1,224 @@
+/**********************************************************
+*    Attention : The comment on this file is written in Japanese. 
+*
+*    main.cpp
+*    dynamic kudou no sample program
+*    This is program to control LTC-4627(Seven-Segment Numeric LED Display) with mbed.
+*
+*    LTC4627(4keta 7segment LED) o dynamic kudou suru. 
+*     http://www.excesssolutions.com/mas_assets/acrobat/ES5721.pdf
+*    common  shuturyoku wa 5 hon.
+*    segment shuturyoku wa 8 hon.
+*    1hon no LED niwa 20[mA] nagasu no de teikou ha 165[ohm](165[ohm] = 3.3[V] / 20[mA])o tukau.165[ohm]ni chikai atai no 180[ohm]o tukau.
+*         
+*
+*    LTC4627 to mbed no setuzoku kankei
+*    LTC4627                                      R(180[ohm])     mbed
+*    PinNo    PinKinou                            (*1)            Pin name (*2)
+*     1        Common Anode Digit 1                -                p20
+*     2        Common Anode Digit 2                -                p19
+*     3        Cathode D                           R                p18
+*     4        Common Anode Digit L1,L2,L3         -                p17
+*     5        Cathode E                           R                p16
+*     6        Common Anode Digit 3                -                p15
+*     7        Cathode D.P                         R                p14
+*     8        Common Anode Digit 4                -                p13
+*     9        No Connection                       -                -
+*    10        No Pin                              -                -
+*    11        Cathode F                           R                p25
+*    12        No Pin                              -                -
+*    13        Cathode C, L3                       R                p24
+*    14        Cathode A, L1                       R                p23
+*    15        Cathode G                           R                p22
+*    16        Cathode B, L2                       R                p21
+*
+*    *1 : "R" no tokoro wa LTC4627 to mbed no aidani teikou o chokuretu ni ireru.
+*        "-" wa teikou ha setuzoku sinai.
+*    *2 : subete "DigitalOut" 
+*
+**********************************************************/
+
+
+#include "mbed.h"
+
+void dynamic_output(void);
+
+// mbed pin no teigi
+// common shuturyoku no setttei
+DigitalOut com_1(p20);
+DigitalOut com_2(p19);
+DigitalOut com_3(p15);
+DigitalOut com_4(p13);
+DigitalOut com_L(p17);  // colon
+
+// segment shuturyoku no settei
+DigitalOut seg_a(p23);
+DigitalOut seg_b(p21);
+DigitalOut seg_c(p24);
+DigitalOut seg_d(p18);
+DigitalOut seg_e(p16);
+DigitalOut seg_f(p25);
+DigitalOut seg_g(p22);
+DigitalOut seg_p(p14);  // DP
+
+DigitalOut seg_col1(p23);
+DigitalOut seg_col2(p21);
+DigitalOut seg_col3(p24);
+
+// 7segment no shuturyoku pattern
+                          //          seg: a b c d  e f g p
+                          //          bit: 7 6 5 4  3 2 1 0
+                          //          ---------------------
+#define D_0 (0xfc)        // 0             1 1 1 1  1 1 0 0
+#define D_1 (0x60)        // 1             0 1 1 0  0 0 0 0
+#define D_2 (0xda)        // 2             1 1 0 1  1 0 1 0
+#define D_3 (0xf2)        // 3             1 1 1 1  0 0 1 0
+#define D_4 (0x66)        // 4             0 1 1 0  0 1 1 0
+#define D_5 (0xb6)        // 5             1 0 1 1  0 1 1 0
+#define D_6 (0xbe)        // 6             1 0 1 1  1 1 1 0
+#define D_7 (0xe4)        // 7             1 1 1 0  0 1 0 0
+#define D_8 (0xfe)        // 8             1 1 1 1  1 1 1 0
+#define D_9 (0xf6)        // 9             1 1 1 1  0 1 1 0
+
+
+DigitalOut myled(LED1);    // program dosa kakunin yo LED
+
+unsigned char D_7seg[4];    // 7segment heno shuturyoku data kakunou you hensu
+                            // [0]:1000 no kurai   [1]:100 no kurai [2]:10 no kurai [3]:1 no kurai
+
+/**************************************
+* main
+**************************************/
+int main() {
+    
+    
+    int data = 0; // hyoji data (4keta no 7segment LED nanode 0 kara 9999 made hyoji dekiru)
+
+    float count = -1;  // 0 kara hyoji saseru tameni -1 o settei suru
+
+   while(1) {
+
+        // program dosa kakunin yo LED tenmetu
+        myled = !myled;
+        wait(0.001000);                // while{} o 1kai shori suru jikan o chosei(kokode jikan tubusi)  (Seven segment refresh rate 1ms)    check.1
+
+        // hyoji data no kousin
+        count = count + 1.000000;          // while{} o 1kai shori surugoto no kasan su      check.2
+        if(count > 9999){count = 0;}    // saidaichi o 9999 ni seigen 
+        data = (int)count;
+        
+        // shuturyoku data no kousin
+        D_7seg[0] =  data / 1000;          // 1000 no kurai no data
+        D_7seg[1] = (data % 1000) / 100;   //  100 no kurai no data
+        D_7seg[2] = (data %  100)  / 10;   //   10 no kurai no data
+        D_7seg[3] = (data %   10);         //    1 no kurai no data
+
+        // dynamic shuturyoku shori
+        dynamic_output();
+    }
+}
+
+/**************************************
+* dynamic_comAllClear
+*
+* common pin o subete OFF suru
+**************************************/
+void dynamic_comAllClear(void){
+    com_1 = 0;
+    com_2 = 0;
+    com_3 = 0;
+    com_4 = 0;
+    com_L = 0;
+}
+
+/**************************************
+* dynamic_segAllClear
+*
+* segment pin o subete OFF suru
+**************************************/
+void dynamic_segAllClear(void){
+    seg_a = 1;
+    seg_b = 1;
+    seg_c = 1;
+    seg_d = 1;
+    seg_e = 1;
+    seg_f = 1;
+    seg_p = 1;
+}
+
+/**************************************
+* dynamic_segDataSet
+*
+* segment pin ni shuturyoku data o settei
+**************************************/
+void dynamic_segDataSet(unsigned char data){
+    const unsigned char Z_segData[10] = {D_0, D_1, D_2, D_3, D_4, D_5, D_6, D_7, D_8, D_9,};
+    unsigned char work;
+    
+    work = Z_segData[data];
+    
+    seg_a = (work & 0x80) ? 0 : 1;
+    seg_b = (work & 0x40) ? 0 : 1;
+    seg_c = (work & 0x20) ? 0 : 1;
+    seg_d = (work & 0x10) ? 0 : 1;
+    seg_e = (work & 0x08) ? 0 : 1;
+    seg_f = (work & 0x04) ? 0 : 1;
+    seg_g = (work & 0x02) ? 0 : 1;
+    seg_p = (work & 0x01) ? 0 : 1;
+    
+}
+
+/**************************************
+* dynamic_output
+*
+* dynamic dosa saseru.
+* kono kansu wo jiikou suru tabi ni common pin o kirikaeru
+**************************************/
+void dynamic_output(void){
+    static unsigned char M_seg = 0;
+        
+    switch(M_seg){
+    case 0:                                // shoto
+        dynamic_comAllClear();
+        dynamic_segAllClear();
+        
+        M_seg = 1;
+        
+        break;
+    case 1:                               // common1 shuturyoku
+        dynamic_comAllClear();
+        dynamic_segDataSet(D_7seg[0]);
+        com_1 = 1;
+        
+        M_seg = 2;
+        break;
+    case 2:                              // common2 shuturyoku
+        dynamic_comAllClear();
+        dynamic_segDataSet(D_7seg[1]);
+        com_2 = 1;
+        
+        M_seg = 3;
+        break;
+    case 3:                             // common3 shuturyoku
+        dynamic_comAllClear();
+        dynamic_segDataSet(D_7seg[2]);
+        com_3 = 1;
+        
+        M_seg = 4;
+        break;
+    case 4:                             // common4 shuturyoku
+        dynamic_comAllClear();
+        dynamic_segDataSet(D_7seg[3]);
+        com_4 = 1;
+        
+        M_seg = 1;
+        break;
+    default:                           // M_seg no atai ga ijo no tokino shori
+        dynamic_comAllClear();
+        dynamic_segAllClear();
+        M_seg = 1;
+        break;
+       
+    }
+        
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Mar 01 11:42:37 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9a9732ce53a1