mbed

Revision 0:a62a79548d00, committed 01 Mar 2011

Comitter:

suu pen

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

main.cpp	Show annotated file Show diff for this revision Revisions of this file
mbed.bld	Show annotated file Show diff for this revision Revisions of this file

--- /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