Wim Huiskamp / SAA1064

7 Segment LED Displaydriver, I2C interface, SAA1064

Dependents:   812_hello

SAA1064.h@2:970360b29a2a, 2013-09-23 (annotated)

Committer:
wim
Date:
Mon Sep 23 19:23:34 2013 +0000
Revision:
2:970360b29a2a
Parent:
1:79cb73f852da 
Documentation updated

Who changed what in which revision?

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wim 0:48adc4a70511 1 /* SAA1064 - I2C LED Driver used in multiplex mode (4x 7 Segments and Decimal Point)
wim 0:48adc4a70511 2 * Copyright (c) 2013 Wim Huiskamp
wim 0:48adc4a70511 3 *
wim 0:48adc4a70511 4 * Released under the MIT License: http://mbed.org/license/mit
wim 0:48adc4a70511 5 *
wim 0:48adc4a70511 6 * version 0.2 Initial Release
wim 0:48adc4a70511 7 */
wim 0:48adc4a70511 8 #ifndef _SAA1064_H
wim 0:48adc4a70511 9 #define _SAA1064_H
wim 0:48adc4a70511 10
wim 1:79cb73f852da 11 /** Driver for SAA1064 I2C 4-Digit 7-Segment LED Driver
wim 1:79cb73f852da 12 *
wim 1:79cb73f852da 13 * @code
wim 1:79cb73f852da 14 * #include "mbed.h"
wim 1:79cb73f852da 15 * #include "SAA1064.h"
wim 1:79cb73f852da 16 *
wim 1:79cb73f852da 17 * // I2C Communication
wim 1:79cb73f852da 18 * I2C i2c_lcd(p28,p27); // SDA, SCL for LPC1768
wim 1:79cb73f852da 19 * //I2C i2c_lcd(P0_10,P0_11); // SDA, SCL for LPC812
wim 1:79cb73f852da 20 *
wim 1:79cb73f852da 21 * SAA1064 LED(&i2c_lcd); // I2C bus, Default SAA1064 Slaveaddress
wim 1:79cb73f852da 22 *
wim 1:79cb73f852da 23 * int main() {
wim 1:79cb73f852da 24 * uint8_t count = 0;
wim 1:79cb73f852da 25 *
wim 1:79cb73f852da 26 * // Display 0, 1, 2, 3
wim 1:79cb73f852da 27 * LED.write(SAA1064_SEGM[0], SAA1064_SEGM[1], SAA1064_SEGM[2], SAA1064_SEGM[3]);
wim 1:79cb73f852da 28 * wait(1);
wim 1:79cb73f852da 29 *
wim 1:79cb73f852da 30 * while(1) {
wim 1:79cb73f852da 31 * wait(0.3);
wim 1:79cb73f852da 32 * count++;
wim 1:79cb73f852da 33 *
wim 1:79cb73f852da 34 * LED.writeInt(-150 + count, 3, false); // Display value, dont suppress leading zero's
wim 1:79cb73f852da 35 * }
wim 1:79cb73f852da 36 *
wim 1:79cb73f852da 37 * }
wim 1:79cb73f852da 38 * @endcode
wim 1:79cb73f852da 39 */
wim 1:79cb73f852da 40
wim 1:79cb73f852da 41
wim 0:48adc4a70511 42 //Address Defines for SAA1064
wim 0:48adc4a70511 43 #define SAA1064_SA0 0x70
wim 0:48adc4a70511 44 #define SAA1064_SA1 0x72
wim 0:48adc4a70511 45 #define SAA1064_SA2 0x74
wim 0:48adc4a70511 46 #define SAA1064_SA3 0x76
wim 0:48adc4a70511 47
wim 0:48adc4a70511 48 //Register Defines for SAA1064
wim 0:48adc4a70511 49 #define SAA1064_CTRL 0x00
wim 0:48adc4a70511 50 #define SAA1064_DIG1 0x01
wim 0:48adc4a70511 51 #define SAA1064_DIG2 0x02
wim 0:48adc4a70511 52 #define SAA1064_DIG3 0x03
wim 0:48adc4a70511 53 #define SAA1064_DIG4 0x04
wim 0:48adc4a70511 54
wim 0:48adc4a70511 55 //Control Register Defines for SAA1064
wim 0:48adc4a70511 56 //Static display (2 digits) or Multiplexed (4 digits)
wim 0:48adc4a70511 57 #define SAA1064_MPX 0x01
wim 0:48adc4a70511 58 //Digits 1 and 2 On
wim 0:48adc4a70511 59 #define SAA1064_B0 0x02
wim 0:48adc4a70511 60 //Digits 3 and 4 On
wim 0:48adc4a70511 61 #define SAA1064_B1 0x04
wim 0:48adc4a70511 62 //Intensity of display
wim 0:48adc4a70511 63 #define SAA1064_INT0 0x00
wim 0:48adc4a70511 64 #define SAA1064_INT1 0x10
wim 0:48adc4a70511 65 #define SAA1064_INT2 0x20
wim 0:48adc4a70511 66 #define SAA1064_INT3 0x30
wim 0:48adc4a70511 67 #define SAA1064_INT4 0x40
wim 0:48adc4a70511 68 #define SAA1064_INT5 0x50
wim 0:48adc4a70511 69 #define SAA1064_INT6 0x60
wim 0:48adc4a70511 70 #define SAA1064_INT7 0x70
wim 0:48adc4a70511 71
wim 0:48adc4a70511 72 //Default Mode: Multiplex On, All Digits On
wim 0:48adc4a70511 73 #define SAA1064_CTRL_DEF (SAA1064_MPX | SAA1064_B0 | SAA1064_B1)
wim 0:48adc4a70511 74
wim 0:48adc4a70511 75
wim 0:48adc4a70511 76 //Pin Defines for SAA1064
wim 0:48adc4a70511 77 #define D_L0 0x01
wim 0:48adc4a70511 78 #define D_L1 0x02
wim 0:48adc4a70511 79 #define D_L2 0x04
wim 0:48adc4a70511 80 #define D_L3 0x08
wim 0:48adc4a70511 81 #define D_L4 0x10
wim 0:48adc4a70511 82 #define D_L5 0x20
wim 0:48adc4a70511 83 #define D_L6 0x40
wim 0:48adc4a70511 84 #define D_L7 0x80
wim 0:48adc4a70511 85
wim 0:48adc4a70511 86 //Defines for Segments
wim 1:79cb73f852da 87 const uint8_t SAA1064_SEGM[] = {0x3F, //0
wim 1:79cb73f852da 88 0x06, //1
wim 1:79cb73f852da 89 0x5B, //2
wim 1:79cb73f852da 90 0x4F, //3
wim 1:79cb73f852da 91 0x66, //4
wim 1:79cb73f852da 92 0x6D, //5
wim 1:79cb73f852da 93 0x7D, //6
wim 1:79cb73f852da 94 0x07, //7
wim 1:79cb73f852da 95 0x7F, //8
wim 1:79cb73f852da 96 0x6F, //9
wim 1:79cb73f852da 97 0x77, //A
wim 1:79cb73f852da 98 0x7C, //B
wim 1:79cb73f852da 99 0x39, //C
wim 1:79cb73f852da 100 0x5E, //D
wim 1:79cb73f852da 101 0x79, //E
wim 1:79cb73f852da 102 0x71}; //F
wim 0:48adc4a70511 103
wim 1:79cb73f852da 104 #define SAA1064_DP 0x80 //Decimal Point
wim 1:79cb73f852da 105 #define SAA1064_MINUS 0x40 //Minus Sign
wim 1:79cb73f852da 106 #define SAA1064_BLNK 0x00 //Blank Digit
wim 1:79cb73f852da 107 #define SAA1064_ALL 0xFF //All Segments On
wim 0:48adc4a70511 108
wim 0:48adc4a70511 109
wim 1:79cb73f852da 110
wim 1:79cb73f852da 111
wim 1:79cb73f852da 112 /** Create an SAA1064 object connected to the specified I2C bus and deviceAddress
wim 0:48adc4a70511 113 *
wim 0:48adc4a70511 114 */
wim 0:48adc4a70511 115 class SAA1064 {
wim 0:48adc4a70511 116 public:
wim 1:79cb73f852da 117 /** Create a SAA1064 LED displaydriver object using a specified I2C bus and slaveaddress
wim 1:79cb73f852da 118 *
wim 1:79cb73f852da 119 * @param I2C &i2c the I2C port to connect to
wim 1:79cb73f852da 120 * @param char deviceAddress the address of the SAA1064
wim 1:79cb73f852da 121 */
wim 1:79cb73f852da 122 SAA1064(I2C *i2c, uint8_t deviceAddress = SAA1064_SA0);
wim 1:79cb73f852da 123
wim 1:79cb73f852da 124 /** Set segment brightness
wim 1:79cb73f852da 125 *
wim 1:79cb73f852da 126 * @param intensity intensity value, valid Range between 0-7, 0 = 0 mA/segment, 1 = 3 mA/segment etc
wim 1:79cb73f852da 127 */
wim 1:79cb73f852da 128 void setIntensity(uint8_t intensity);
wim 1:79cb73f852da 129
wim 1:79cb73f852da 130
wim 1:79cb73f852da 131 /** Write digits
wim 1:79cb73f852da 132 *
wim 1:79cb73f852da 133 * @param digit1 LED segment pattern for digit1 (MSB)
wim 1:79cb73f852da 134 * @param digit2 LED segment pattern for digit2
wim 1:79cb73f852da 135 * @param digit3 LED segment pattern for digit3
wim 1:79cb73f852da 136 * @param digit4 LED segment pattern for digit4 (LSB)
wim 1:79cb73f852da 137 */
wim 1:79cb73f852da 138 void write(uint8_t digit1, uint8_t digit2, uint8_t digit3, uint8_t digit4);
wim 0:48adc4a70511 139
wim 1:79cb73f852da 140 /** Write Integer
wim 1:79cb73f852da 141 *
wim 1:79cb73f852da 142 * @param value integer value to display, valid range -999...9999
wim 1:79cb73f852da 143 * @param dp_digit digit where decimal point is set, valid range 1..4 (no DP shown for dp_digit = 0)
wim 1:79cb73f852da 144 * @param leading suppress leading zero (false=show leading zero, true=suppress leading zero)
wim 1:79cb73f852da 145 */
wim 1:79cb73f852da 146 void writeInt(int value, uint8_t dp_digit=0, bool leading=true);
wim 0:48adc4a70511 147
wim 0:48adc4a70511 148
wim 1:79cb73f852da 149 /** snake: show a short animation
wim 1:79cb73f852da 150 *
wim 1:79cb73f852da 151 * @param count number of times animation is repeated, valid range 0..15
wim 1:79cb73f852da 152 *
wim 1:79cb73f852da 153 */
wim 1:79cb73f852da 154 void snake(uint8_t count);
wim 1:79cb73f852da 155
wim 1:79cb73f852da 156 /** splash: show a short animation
wim 1:79cb73f852da 157 *
wim 1:79cb73f852da 158 * @param count number of times animation is repeated, valid range 0..15
wim 1:79cb73f852da 159 *
wim 1:79cb73f852da 160 */
wim 1:79cb73f852da 161 void splash (uint8_t count);
wim 1:79cb73f852da 162
wim 0:48adc4a70511 163 protected:
wim 1:79cb73f852da 164 I2C *_i2c; //I2C bus reference
wim 1:79cb73f852da 165 uint8_t _slaveAddress; //I2C Slave address of device
wim 0:48adc4a70511 166
wim 1:79cb73f852da 167 /** Initialise LED driver
wim 1:79cb73f852da 168 *
wim 1:79cb73f852da 169 */
wim 0:48adc4a70511 170 void _init();
wim 0:48adc4a70511 171 };
wim 0:48adc4a70511 172
wim 0:48adc4a70511 173 #endif