Nathan Yonkee / Mbed OS Seeed_Grove_4_Digit_Display_Clock

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Dependencies:   Data_Clock_Pair Seeed_Chainable_LED Seeed_Four_Digit_Disp Seeed_IR_Temp_Sensor Seeed_Led_Bar

Fork of Seeed_Grove_4_Digit_Display_Clock by Seeed

SeeedFourDigitDisp.h@12:a16d86fac131, 2017-04-27 (annotated)

Committer:
tulanthoar
Date:
Thu Apr 27 16:08:02 2017 -0600
Revision:
12:a16d86fac131
Parent:
7:b16b9733d859
Child:
15:abda719ba6e6
use a pin pair struct to avoid confusing data and clock pins

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tulanthoar 7:b16b9733d859 1 #ifndef SEEED_FOUR_DIGIT_DISP_H
tulanthoar 7:b16b9733d859 2 #define SEEED_FOUR_DIGIT_DISP_H
tulanthoar 7:b16b9733d859 3 #include "mbed.h"
tulanthoar 12:a16d86fac131 4 #include "DataClockPair.h"
tulanthoar 7:b16b9733d859 5
tulanthoar 7:b16b9733d859 6 class SeeedFourDigitDisp {
tulanthoar 7:b16b9733d859 7 private:
tulanthoar 7:b16b9733d859 8 int digitTable_[17];
tulanthoar 7:b16b9733d859 9 static const int onByte_ = 0x88;
tulanthoar 7:b16b9733d859 10 static const int fixedAddrByte_ = 0x44;
tulanthoar 7:b16b9733d859 11 static const int positionBit_ = 0xc0;
tulanthoar 7:b16b9733d859 12 static const int nullDigit_ = 16;
tulanthoar 7:b16b9733d859 13 static const int colonBit_ = 0x80;
tulanthoar 7:b16b9733d859 14 void start_cmd();
tulanthoar 7:b16b9733d859 15 void stop_cmd();
tulanthoar 7:b16b9733d859 16 DigitalOut datPin_;
tulanthoar 7:b16b9733d859 17 DigitalOut clkPin_;
tulanthoar 7:b16b9733d859 18 void pin_delay(int delay_us = 1);
tulanthoar 7:b16b9733d859 19 void send_byte(int byte);
tulanthoar 7:b16b9733d859 20 public:
tulanthoar 7:b16b9733d859 21 int brightness;
tulanthoar 7:b16b9733d859 22 bool colonFlag;
tulanthoar 7:b16b9733d859 23 void set_digit(int pos, int digit);
tulanthoar 7:b16b9733d859 24 void set_integer(int value);
tulanthoar 7:b16b9733d859 25 void clear_display();
tulanthoar 7:b16b9733d859 26 void turn_on();
tulanthoar 12:a16d86fac131 27 SeeedFourDigitDisp (DataClockPair pins);
tulanthoar 7:b16b9733d859 28 };
tulanthoar 7:b16b9733d859 29
tulanthoar 12:a16d86fac131 30 SeeedFourDigitDisp::SeeedFourDigitDisp(DataClockPair pins) : datPin_(pins.dataPin, 1), clkPin_(pins.clockPin, 1) {
tulanthoar 7:b16b9733d859 31 brightness = 7;
tulanthoar 7:b16b9733d859 32 colonFlag = false;
tulanthoar 7:b16b9733d859 33 const int digits[] = {0x3f, 0x06, 0x5b, 0x4f,
tulanthoar 7:b16b9733d859 34 0x66, 0x6d, 0x7d, 0x07,
tulanthoar 7:b16b9733d859 35 0x7f, 0x6f, 0x77, 0x7c,
tulanthoar 7:b16b9733d859 36 0x39, 0x5e, 0x79, 0x71,
tulanthoar 7:b16b9733d859 37 0x00
tulanthoar 7:b16b9733d859 38 }; //0~9,A,b,C,d,E,F,null
tulanthoar 12:a16d86fac131 39 for (int i = 0; i < 17; ++i) {
tulanthoar 7:b16b9733d859 40 digitTable_[i] = digits[i];
tulanthoar 7:b16b9733d859 41 }
tulanthoar 7:b16b9733d859 42 clear_display();
tulanthoar 7:b16b9733d859 43 }
tulanthoar 7:b16b9733d859 44
tulanthoar 12:a16d86fac131 45 void SeeedFourDigitDisp::pin_delay(int delay_us) {
tulanthoar 12:a16d86fac131 46 wait_us(delay_us);
tulanthoar 12:a16d86fac131 47 }
tulanthoar 12:a16d86fac131 48
tulanthoar 7:b16b9733d859 49 void SeeedFourDigitDisp::start_cmd() {
tulanthoar 12:a16d86fac131 50 datPin_ = !datPin_;
tulanthoar 7:b16b9733d859 51 }
tulanthoar 7:b16b9733d859 52
tulanthoar 7:b16b9733d859 53 void SeeedFourDigitDisp::stop_cmd() {
tulanthoar 7:b16b9733d859 54 datPin_ = 0;
tulanthoar 12:a16d86fac131 55 clkPin_ = !clkPin_;
tulanthoar 7:b16b9733d859 56 pin_delay();
tulanthoar 12:a16d86fac131 57 clkPin_ = !clkPin_;
tulanthoar 12:a16d86fac131 58 datPin_ = !datPin_;
tulanthoar 7:b16b9733d859 59 }
tulanthoar 7:b16b9733d859 60
tulanthoar 12:a16d86fac131 61 void SeeedFourDigitDisp::send_byte(int byte) {
tulanthoar 12:a16d86fac131 62 byte |= 0x100; // bring data high for ack after 8 bits
tulanthoar 12:a16d86fac131 63 for (int i = 0; i < 9; ++i) {
tulanthoar 12:a16d86fac131 64 pin_delay();
tulanthoar 12:a16d86fac131 65 clkPin_ = !clkPin_;
tulanthoar 12:a16d86fac131 66 pin_delay();
tulanthoar 12:a16d86fac131 67 datPin_ = byte & 1;
tulanthoar 12:a16d86fac131 68 byte >>= 1;
tulanthoar 12:a16d86fac131 69 pin_delay();
tulanthoar 12:a16d86fac131 70 clkPin_ = !clkPin_;
tulanthoar 12:a16d86fac131 71 }
tulanthoar 7:b16b9733d859 72 }
tulanthoar 7:b16b9733d859 73
tulanthoar 7:b16b9733d859 74 void SeeedFourDigitDisp::set_digit(int pos, int digit) {
tulanthoar 7:b16b9733d859 75 int flaggedDigit = digitTable_[digit] | (colonFlag ? colonBit_ : 0);
tulanthoar 7:b16b9733d859 76 start_cmd(); //start signal sent to TM1637 from MCU
tulanthoar 7:b16b9733d859 77 send_byte(fixedAddrByte_);
tulanthoar 7:b16b9733d859 78 stop_cmd();
tulanthoar 7:b16b9733d859 79 start_cmd();
tulanthoar 7:b16b9733d859 80 send_byte(pos|positionBit_);
tulanthoar 7:b16b9733d859 81 send_byte(flaggedDigit);
tulanthoar 7:b16b9733d859 82 stop_cmd();
tulanthoar 7:b16b9733d859 83 start_cmd();
tulanthoar 7:b16b9733d859 84 send_byte(onByte_ + brightness);
tulanthoar 7:b16b9733d859 85 stop_cmd();
tulanthoar 12:a16d86fac131 86 }
tulanthoar 7:b16b9733d859 87
tulanthoar 12:a16d86fac131 88 void SeeedFourDigitDisp::turn_on() {
tulanthoar 12:a16d86fac131 89 start_cmd();
tulanthoar 12:a16d86fac131 90 send_byte(onByte_+brightness);
tulanthoar 12:a16d86fac131 91 stop_cmd();
tulanthoar 7:b16b9733d859 92 }
tulanthoar 7:b16b9733d859 93
tulanthoar 12:a16d86fac131 94 void SeeedFourDigitDisp::clear_display() {
tulanthoar 12:a16d86fac131 95 set_digit(0,nullDigit_);
tulanthoar 12:a16d86fac131 96 set_digit(1,nullDigit_);
tulanthoar 12:a16d86fac131 97 set_digit(2,nullDigit_);
tulanthoar 12:a16d86fac131 98 set_digit(3,nullDigit_);
tulanthoar 12:a16d86fac131 99 }
tulanthoar 12:a16d86fac131 100
tulanthoar 12:a16d86fac131 101
tulanthoar 7:b16b9733d859 102 void SeeedFourDigitDisp::set_integer(int value) {
tulanthoar 7:b16b9733d859 103 clear_display();
tulanthoar 7:b16b9733d859 104 if( value < 0 ) {
tulanthoar 7:b16b9733d859 105 colonFlag = true;
tulanthoar 7:b16b9733d859 106 set_digit(0, 0);
tulanthoar 7:b16b9733d859 107 return;
tulanthoar 7:b16b9733d859 108 }
tulanthoar 7:b16b9733d859 109 if( value > 9999 ) {
tulanthoar 7:b16b9733d859 110 colonFlag = true;
tulanthoar 7:b16b9733d859 111 set_digit(0, 15);
tulanthoar 7:b16b9733d859 112 return;
tulanthoar 7:b16b9733d859 113 }
tulanthoar 7:b16b9733d859 114 for (int i = 3; i >= 0; --i) {
tulanthoar 7:b16b9733d859 115 int digit = value % 10;
tulanthoar 7:b16b9733d859 116 set_digit(i, digit);
tulanthoar 7:b16b9733d859 117 value -= digit;
tulanthoar 7:b16b9733d859 118 if(value < 10) return;
tulanthoar 7:b16b9733d859 119 value /= 10;
tulanthoar 7:b16b9733d859 120 }
tulanthoar 7:b16b9733d859 121 }
tulanthoar 7:b16b9733d859 122
tulanthoar 7:b16b9733d859 123
tulanthoar 7:b16b9733d859 124 #endif