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Harald Pichler 2017-08-07 15:46:53 +02:00
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examples/osd/week-clock/TM1637.cpp Normal file
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// Author:Frankie.Chu
// Date:9 April,2012
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//
// Modified record:
//
/*******************************************************************************/
#include "TM1637.h"
#include <Arduino.h>
static int8_t TubeTab[] = {0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};//0~9,A,b,C,d,E,F
TM1637::TM1637(uint8_t Clk, uint8_t Data)
{
Clkpin = Clk;
Datapin = Data;
pinMode(Clkpin,OUTPUT);
pinMode(Datapin,OUTPUT);
}
void TM1637::init(void)
{
clearDisplay();
}
void TM1637::writeByte(int8_t wr_data)
{
uint8_t i,count1=0;
for(i=0;i<8;i++) //sent 8bit data
{
digitalWrite(Clkpin,LOW);
if(wr_data & 0x01)digitalWrite(Datapin,HIGH);//LSB first
else digitalWrite(Datapin,LOW);
wr_data >>= 1;
digitalWrite(Clkpin,HIGH);
}
digitalWrite(Clkpin,LOW); //wait for the ACK
digitalWrite(Datapin,HIGH);
digitalWrite(Clkpin,HIGH);
pinMode(Datapin,INPUT);
while(digitalRead(Datapin))
{
count1 +=1;
if(count1 == 200)//
{
pinMode(Datapin,OUTPUT);
digitalWrite(Datapin,LOW);
count1 =0;
}
pinMode(Datapin,INPUT);
}
pinMode(Datapin,OUTPUT);
}
//send start signal to TM1637
void TM1637::start(void)
{
digitalWrite(Clkpin,HIGH);//send start signal to TM1637
digitalWrite(Datapin,HIGH);
digitalWrite(Datapin,LOW);
digitalWrite(Clkpin,LOW);
}
//End of transmission
void TM1637::stop(void)
{
digitalWrite(Clkpin,LOW);
digitalWrite(Datapin,LOW);
digitalWrite(Clkpin,HIGH);
digitalWrite(Datapin,HIGH);
}
//display function.Write to full-screen.
void TM1637::display(int8_t DispData[])
{
int8_t SegData[4];
uint8_t i;
for(i = 0;i < 4;i ++)
{
SegData[i] = DispData[i];
}
coding(SegData);
start(); //start signal sent to TM1637 from MCU
writeByte(ADDR_AUTO);//
stop(); //
start(); //
writeByte(Cmd_SetAddr);//
for(i=0;i < 4;i ++)
{
writeByte(SegData[i]); //
}
stop(); //
start(); //
writeByte(Cmd_DispCtrl);//
stop(); //
}
//******************************************
void TM1637::display(uint8_t BitAddr,int8_t DispData)
{
int8_t SegData;
SegData = coding(DispData);
start(); //start signal sent to TM1637 from MCU
writeByte(ADDR_FIXED);//
stop(); //
start(); //
writeByte(BitAddr|0xc0);//
writeByte(SegData);//
stop(); //
start(); //
writeByte(Cmd_DispCtrl);//
stop(); //
}
void TM1637::clearDisplay(void)
{
display(0x00,0x7f);
display(0x01,0x7f);
display(0x02,0x7f);
display(0x03,0x7f);
}
//To take effect the next time it displays.
void TM1637::set(uint8_t brightness,uint8_t SetData,uint8_t SetAddr)
{
Cmd_SetData = SetData;
Cmd_SetAddr = SetAddr;
Cmd_DispCtrl = 0x88 + brightness;//Set the brightness and it takes effect the next time it displays.
}
//Whether to light the clock point ":".
//To take effect the next time it displays.
void TM1637::point(boolean PointFlag)
{
_PointFlag = PointFlag;
}
void TM1637::coding(int8_t DispData[])
{
uint8_t PointData;
if(_PointFlag == POINT_ON)PointData = 0x80;
else PointData = 0;
for(uint8_t i = 0;i < 4;i ++)
{
if(DispData[i] == 0x7f)DispData[i] = 0x00;
else DispData[i] = TubeTab[DispData[i]] + PointData;
}
}
int8_t TM1637::coding(int8_t DispData)
{
uint8_t PointData;
if(_PointFlag == POINT_ON)PointData = 0x80;
else PointData = 0;
if(DispData == 0x7f) DispData = 0x00 + PointData;//The bit digital tube off
else DispData = TubeTab[DispData] + PointData;
return DispData;
}