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https://github.com/avishorp/TM1637.git
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Initial library files
The code writes to the display module and shows a predefined constant pattern
This commit is contained in:
Avishay
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// Author: avishorp@gmail.com
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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extern "C" {
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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}
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#include <TM1637Display.h>
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#include <Arduino.h>
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TM1637Display::TM1637Display(uint8_t pinClk, uint8_t pinDIO)
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{
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// Copy the pin numbers
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m_pinClk = pinClk;
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m_pinDIO = pinDIO;
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// Set the pin direction and default value.
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// Both pins are set as inputs, allowing the pull-up resistors to pull them up
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pinMode(m_pinClk, INPUT);
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pinMode(m_pinDIO,INPUT);
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digitalWrite(m_pinClk, LOW);
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digitalWrite(m_pinDIO, LOW);
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}
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void TM1637Display::setBrightness(uint8_t brightness)
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{
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m_brightness = brightness;
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}
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void TM1637Display::setSegments(uint8_t segments[], uint8_t length, uint8_t pos)
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{
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start();
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if (!writeByte(0x40))
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digitalWrite(13,HIGH);
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stop();
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start();
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writeByte(0xc0);
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writeByte(0xff);
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writeByte(0xff);
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writeByte(0x00);
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writeByte(0xff);
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stop();
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start();
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writeByte(0x8f);
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stop();
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}
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void TM1637Display::showNumberDec(int num, bool leading_zero, uint8_t length, uint8_t pos)
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{
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}
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void TM1637Display::bitDelay()
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{
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delay(1);
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// int i;
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// for(i = 0; i < 250; i++);
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}
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void TM1637Display::start()
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{
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pinMode(m_pinDIO, OUTPUT);
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bitDelay();
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}
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void TM1637Display::stop()
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{
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pinMode(m_pinDIO, OUTPUT);
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bitDelay();
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pinMode(m_pinClk, INPUT);
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bitDelay();
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pinMode(m_pinDIO, INPUT);
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bitDelay();
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}
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bool TM1637Display::writeByte(uint8_t b)
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{
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uint8_t data = b;
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// 8 Data Bits
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for(uint8_t i = 0; i < 8; i++) {
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// CLK low
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pinMode(m_pinClk, OUTPUT);
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bitDelay();
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// Set data bit
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if (data & 0x01)
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pinMode(m_pinDIO, INPUT);
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else
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pinMode(m_pinDIO, OUTPUT);
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bitDelay();
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// CLK high
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pinMode(m_pinClk, INPUT);
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bitDelay();
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data = data >> 1;
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}
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// Wait for acknowledge
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// CLK to zero
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pinMode(m_pinClk, OUTPUT);
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pinMode(m_pinDIO, INPUT);
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bitDelay();
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// CLK to high
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pinMode(m_pinClk, INPUT);
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bitDelay();
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uint8_t ack = digitalRead(m_pinDIO);
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if (ack == 0)
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pinMode(m_pinDIO, OUTPUT);
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bitDelay();
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pinMode(m_pinClk, OUTPUT);
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bitDelay();
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return ack;
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}
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@@ -0,0 +1,82 @@
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// Author: avishorp@gmail.com
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef __TM1637DISPLAY__
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#define __TM1637DISPLAY__
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#include <inttypes.h>
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class TM1637Display {
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public:
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//! Initialize a TM1637Display object, setting the clock and
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//! data pins.
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//!
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//! @param pinClk - The number of the digital pin connected to the clock pin of the module
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//! @param pinDIO - The number of the digital pin connected to the DIO pin of the module
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TM1637Display(uint8_t pinClk, uint8_t pinDIO);
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//! Sets the brightness of the display.
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//!
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//! The setting takes effect when a command is given to change the data being
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//! displayed.
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//!
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//! @param brightness A number from 0 (lowes brightness) to 7 (highest brightness)
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void setBrightness(uint8_t brightness);
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//! Display arbitrary data on the module
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//!
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//! This function receives raw segment values as input and displays them. The segment data
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//! is given as a byte array, each byte corresponding to a single digit. Within each byte,
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//! bit 0 is segment A, bit 1 is segment B etc.
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//! The function may either set the entire display or any desirable part on its own. The first
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//! digit is given by the @ref pos argument with 0 being the leftmost digit. The @ref length
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//! argument is the number of digits to be set. Other digits are not affected.
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//!
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//! @param segments An array of size @ref length containing the raw segment values
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//! @param length The number of digits to be modified
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//! @param pos The position from which to start the modification (0 - leftmost, 3 - rightmost)
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void setSegments(uint8_t segments[], uint8_t length = 4, uint8_t pos = 0);
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//! Displayes a decimal number
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//!
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//! Dispalyes the given argument as a decimal number
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//!
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//! @param num The number to be shown
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//! @param leading_zero When true, leading zeros are displayed. Otherwise unnecessary digits are
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//! blank
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//! @param length The number of digits to set. The user must ensure that the number to be shown
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//! fits to the number of digits requested (for example, if two digits are to be displayed,
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//! the number must be between 0 to 99)
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//! @param pos The position least significant digit (0 - leftmost, 3 - rightmost)
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void showNumberDec(int num, bool leading_zero = false, uint8_t length = 4, uint8_t pos = 0);
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protected:
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void bitDelay();
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void start();
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void stop();
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bool writeByte(uint8_t b);
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private:
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uint8_t m_pinClk;
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uint8_t m_pinDIO;
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uint8_t m_brightness;
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};
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#endif // __TM1637DISPLAY__
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