Nathan Yonkee / Mbed OS Seeed_Grove_4_Digit_Display_Clock

fork of seeed studio 4-digit display for st nucleo board

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@8:09c844708255, 2017-04-21 (annotated)

Committer:
tulanthoar
Date:
Fri Apr 21 13:47:19 2017 +0000
Revision:
8:09c844708255
Parent:
7:b16b9733d859
Child:
12:a16d86fac131
add fastio library

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 7:b16b9733d859 4
tulanthoar 7:b16b9733d859 5 class SeeedFourDigitDisp {
tulanthoar 7:b16b9733d859 6 private:
tulanthoar 7:b16b9733d859 7 int digitTable_[17];
tulanthoar 7:b16b9733d859 8 static const int onByte_ = 0x88;
tulanthoar 7:b16b9733d859 9 static const int fixedAddrByte_ = 0x44;
tulanthoar 7:b16b9733d859 10 static const int positionBit_ = 0xc0;
tulanthoar 7:b16b9733d859 11 static const int nullDigit_ = 16;
tulanthoar 7:b16b9733d859 12 static const int colonBit_ = 0x80;
tulanthoar 7:b16b9733d859 13 void start_cmd();
tulanthoar 7:b16b9733d859 14 void stop_cmd();
tulanthoar 7:b16b9733d859 15 DigitalOut datPin_;
tulanthoar 7:b16b9733d859 16 DigitalOut clkPin_;
tulanthoar 7:b16b9733d859 17 void pin_delay(int delay_us = 1);
tulanthoar 7:b16b9733d859 18 void send_byte(int byte);
tulanthoar 7:b16b9733d859 19 public:
tulanthoar 7:b16b9733d859 20 int brightness;
tulanthoar 7:b16b9733d859 21 bool colonFlag;
tulanthoar 7:b16b9733d859 22 void set_digit(int pos, int digit);
tulanthoar 7:b16b9733d859 23 void set_integer(int value);
tulanthoar 7:b16b9733d859 24 void clear_display();
tulanthoar 7:b16b9733d859 25 void turn_on();
tulanthoar 7:b16b9733d859 26 SeeedFourDigitDisp (PinName dataOut, PinName clockOut);
tulanthoar 7:b16b9733d859 27 };
tulanthoar 7:b16b9733d859 28
tulanthoar 7:b16b9733d859 29 SeeedFourDigitDisp::SeeedFourDigitDisp(PinName dataOut, PinName clockOut) : datPin_(dataOut), clkPin_(clockOut) {
tulanthoar 7:b16b9733d859 30 brightness = 7;
tulanthoar 7:b16b9733d859 31 colonFlag = false;
tulanthoar 7:b16b9733d859 32 const int digits[] = {0x3f, 0x06, 0x5b, 0x4f,
tulanthoar 7:b16b9733d859 33 0x66, 0x6d, 0x7d, 0x07,
tulanthoar 7:b16b9733d859 34 0x7f, 0x6f, 0x77, 0x7c,
tulanthoar 7:b16b9733d859 35 0x39, 0x5e, 0x79, 0x71,
tulanthoar 7:b16b9733d859 36 0x00
tulanthoar 7:b16b9733d859 37 }; //0~9,A,b,C,d,E,F,null
tulanthoar 7:b16b9733d859 38 for (int i = 0; i < 17; i++) {
tulanthoar 7:b16b9733d859 39 digitTable_[i] = digits[i];
tulanthoar 7:b16b9733d859 40 }
tulanthoar 7:b16b9733d859 41 clear_display();
tulanthoar 7:b16b9733d859 42 }
tulanthoar 7:b16b9733d859 43
tulanthoar 7:b16b9733d859 44 void SeeedFourDigitDisp::start_cmd() {
tulanthoar 7:b16b9733d859 45 datPin_ = 0;
tulanthoar 7:b16b9733d859 46 }
tulanthoar 7:b16b9733d859 47
tulanthoar 7:b16b9733d859 48 void SeeedFourDigitDisp::stop_cmd() {
tulanthoar 7:b16b9733d859 49 clkPin_ = 0;
tulanthoar 7:b16b9733d859 50 datPin_ = 0;
tulanthoar 7:b16b9733d859 51 pin_delay();
tulanthoar 7:b16b9733d859 52 clkPin_ = 1;
tulanthoar 7:b16b9733d859 53 datPin_ = 1;
tulanthoar 7:b16b9733d859 54 }
tulanthoar 7:b16b9733d859 55
tulanthoar 7:b16b9733d859 56 void SeeedFourDigitDisp::clear_display() {
tulanthoar 7:b16b9733d859 57 set_digit(0,nullDigit_);
tulanthoar 7:b16b9733d859 58 set_digit(1,nullDigit_);
tulanthoar 7:b16b9733d859 59 set_digit(2,nullDigit_);
tulanthoar 7:b16b9733d859 60 set_digit(3,nullDigit_);
tulanthoar 7:b16b9733d859 61 }
tulanthoar 7:b16b9733d859 62
tulanthoar 7:b16b9733d859 63 void SeeedFourDigitDisp::set_digit(int pos, int digit) {
tulanthoar 7:b16b9733d859 64 int flaggedDigit = digitTable_[digit] | (colonFlag ? colonBit_ : 0);
tulanthoar 7:b16b9733d859 65 start_cmd(); //start signal sent to TM1637 from MCU
tulanthoar 7:b16b9733d859 66 send_byte(fixedAddrByte_);
tulanthoar 7:b16b9733d859 67 stop_cmd();
tulanthoar 7:b16b9733d859 68 start_cmd();
tulanthoar 7:b16b9733d859 69 send_byte(pos|positionBit_);
tulanthoar 7:b16b9733d859 70 send_byte(flaggedDigit);
tulanthoar 7:b16b9733d859 71 stop_cmd();
tulanthoar 7:b16b9733d859 72 start_cmd();
tulanthoar 7:b16b9733d859 73 send_byte(onByte_ + brightness);
tulanthoar 7:b16b9733d859 74 stop_cmd();
tulanthoar 7:b16b9733d859 75
tulanthoar 7:b16b9733d859 76 }
tulanthoar 7:b16b9733d859 77
tulanthoar 7:b16b9733d859 78 void SeeedFourDigitDisp::set_integer(int value) {
tulanthoar 7:b16b9733d859 79 clear_display();
tulanthoar 7:b16b9733d859 80 if( value < 0 ) {
tulanthoar 7:b16b9733d859 81 colonFlag = true;
tulanthoar 7:b16b9733d859 82 set_digit(0, 0);
tulanthoar 7:b16b9733d859 83 return;
tulanthoar 7:b16b9733d859 84 }
tulanthoar 7:b16b9733d859 85 if( value > 9999 ) {
tulanthoar 7:b16b9733d859 86 colonFlag = true;
tulanthoar 7:b16b9733d859 87 set_digit(0, 15);
tulanthoar 7:b16b9733d859 88 return;
tulanthoar 7:b16b9733d859 89 }
tulanthoar 7:b16b9733d859 90 for (int i = 3; i >= 0; --i) {
tulanthoar 7:b16b9733d859 91 int digit = value % 10;
tulanthoar 7:b16b9733d859 92 set_digit(i, digit);
tulanthoar 7:b16b9733d859 93 value -= digit;
tulanthoar 7:b16b9733d859 94 if(value < 10) return;
tulanthoar 7:b16b9733d859 95 value /= 10;
tulanthoar 7:b16b9733d859 96 }
tulanthoar 7:b16b9733d859 97 }
tulanthoar 7:b16b9733d859 98
tulanthoar 7:b16b9733d859 99 void SeeedFourDigitDisp::turn_on() {
tulanthoar 7:b16b9733d859 100 start_cmd();
tulanthoar 7:b16b9733d859 101 send_byte(onByte_+brightness);
tulanthoar 7:b16b9733d859 102 stop_cmd();
tulanthoar 7:b16b9733d859 103 }
tulanthoar 7:b16b9733d859 104
tulanthoar 7:b16b9733d859 105 void SeeedFourDigitDisp::pin_delay(int delay_us) {
tulanthoar 7:b16b9733d859 106 wait_us(delay_us);
tulanthoar 7:b16b9733d859 107 }
tulanthoar 7:b16b9733d859 108
tulanthoar 7:b16b9733d859 109 void SeeedFourDigitDisp::send_byte(int byte) {
tulanthoar 7:b16b9733d859 110 byte |= 0x100; // bring data high for ack after 8 bits
tulanthoar 7:b16b9733d859 111 for (uint8_t i = 0; i < 9; i++) {
tulanthoar 7:b16b9733d859 112 pin_delay();
tulanthoar 7:b16b9733d859 113 clkPin_ = 0;
tulanthoar 7:b16b9733d859 114 pin_delay();
tulanthoar 7:b16b9733d859 115 datPin_ = byte & 1;
tulanthoar 7:b16b9733d859 116 pin_delay();
tulanthoar 7:b16b9733d859 117 byte >>= 1;
tulanthoar 7:b16b9733d859 118 clkPin_ = 1;
tulanthoar 7:b16b9733d859 119 }
tulanthoar 7:b16b9733d859 120 }
tulanthoar 7:b16b9733d859 121
tulanthoar 7:b16b9733d859 122 #endif