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Seven-Segmet Numeric LED Display : LTC-4627 Dynamic drive. mbed - LTC-4627 direct drive
Diff: main.cpp
- Revision:
- 0:a62a79548d00
--- /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;
+
+ }
+
+}