Suga koubou / I2CLEDDisp

Parallel to I2C for Intelligent LED Display module PD2435~7 / PD3535~7 / PD4435~7 (OSRAM)

Dependents:   i2cleddisp_sample WeatherPlatform_20110408 WeatherPlatform WeatherStation

I2CLEDDisp.cpp@0:eae10b76cd72, 2010-10-21 (annotated)

Committer:
okini3939
Date:
Thu Oct 21 11:51:14 2010 +0000
Revision:
0:eae10b76cd72

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


okini3939

0:eae10b76cd72


     1

/*





okini3939

0:eae10b76cd72


     2

 * mbed library for I2C LED Display





okini3939

0:eae10b76cd72


     3

 * Copyright (c) 2010 Hiroshi Suga





okini3939

0:eae10b76cd72


     4

 * Released under the MIT License: http://mbed.org/license/mit





okini3939

0:eae10b76cd72


     5

 *





okini3939

0:eae10b76cd72


     6

 * This product includes:





okini3939

0:eae10b76cd72


     7

 * mbed TextLCD Library, for a 4-bit LCD based on HD44780





okini3939

0:eae10b76cd72


     8

 * Copyright (c) 2007-2010, sford





okini3939

0:eae10b76cd72


     9

 */





okini3939

0:eae10b76cd72


    10







okini3939

0:eae10b76cd72


    11

#include "mbed.h"





okini3939

0:eae10b76cd72


    12

#include "I2CLEDDisp.h"





okini3939

0:eae10b76cd72


    13







okini3939

0:eae10b76cd72


    14







okini3939

0:eae10b76cd72


    15

int I2CLEDDisp::_putc (int value) {





okini3939

0:eae10b76cd72


    16







okini3939

0:eae10b76cd72


    17

    if (value == '\n') {





okini3939

0:eae10b76cd72


    18

		locate(0, 0);





okini3939

0:eae10b76cd72


    19







okini3939

0:eae10b76cd72


    20

    } else {





okini3939

0:eae10b76cd72


    21







okini3939

0:eae10b76cd72


    22

        disp_out(value, address(x, y));





okini3939

0:eae10b76cd72


    23

        x ++;





okini3939

0:eae10b76cd72


    24

        if (x >= cols()) {





okini3939

0:eae10b76cd72


    25

            x = 0;





okini3939

0:eae10b76cd72


    26

        }





okini3939

0:eae10b76cd72


    27







okini3939

0:eae10b76cd72


    28

		if (ctrl & LEDDISP_CONTROL_ATTRIB && (ctrl & 0x03) != LEDDISP_CONTROL_AB) {





okini3939

0:eae10b76cd72


    29

	        disp_out(0x80 | disp_in(address(x, y)), address(x, y));





okini3939

0:eae10b76cd72


    30

		}





okini3939

0:eae10b76cd72


    31







okini3939

0:eae10b76cd72


    32

    }





okini3939

0:eae10b76cd72


    33







okini3939

0:eae10b76cd72


    34

    return value;





okini3939

0:eae10b76cd72


    35

}





okini3939

0:eae10b76cd72


    36







okini3939

0:eae10b76cd72


    37

int I2CLEDDisp::_getc() {





okini3939

0:eae10b76cd72


    38

	int i;





okini3939

0:eae10b76cd72


    39







okini3939

0:eae10b76cd72


    40

	i = disp_in(x);





okini3939

0:eae10b76cd72


    41

    x ++;





okini3939

0:eae10b76cd72


    42

    if (x >= cols()) {





okini3939

0:eae10b76cd72


    43

        x = 0;





okini3939

0:eae10b76cd72


    44

    }





okini3939

0:eae10b76cd72


    45

    return i;





okini3939

0:eae10b76cd72


    46

}





okini3939

0:eae10b76cd72


    47







okini3939

0:eae10b76cd72


    48







okini3939

0:eae10b76cd72


    49

I2CLEDDisp::I2CLEDDisp (PinName p_sda, PinName p_scl, int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) : i2c(p_sda, p_scl) {





okini3939

0:eae10b76cd72


    50

    init(p_i2caddr, p_type, p_ctrl);





okini3939

0:eae10b76cd72


    51

}





okini3939

0:eae10b76cd72


    52







okini3939

0:eae10b76cd72


    53

I2CLEDDisp::I2CLEDDisp (I2C& p_i2c, int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) : i2c(p_i2c) {





okini3939

0:eae10b76cd72


    54

    init(p_i2caddr, p_type, p_ctrl);





okini3939

0:eae10b76cd72


    55

}





okini3939

0:eae10b76cd72


    56







okini3939

0:eae10b76cd72


    57

void I2CLEDDisp::init (int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) {





okini3939

0:eae10b76cd72


    58







okini3939

0:eae10b76cd72


    59

	i2caddr = p_i2caddr;





okini3939

0:eae10b76cd72


    60

    type = p_type;





okini3939

0:eae10b76cd72


    61

    ctrl = p_ctrl;





okini3939

0:eae10b76cd72


    62







okini3939

0:eae10b76cd72


    63

    cls();





okini3939

0:eae10b76cd72


    64

}





okini3939

0:eae10b76cd72


    65







okini3939

0:eae10b76cd72


    66

void I2CLEDDisp::cls() {





okini3939

0:eae10b76cd72


    67

	int i;





okini3939

0:eae10b76cd72


    68

	





okini3939

0:eae10b76cd72


    69

	for (i = 0; i < type; i ++) {





okini3939

0:eae10b76cd72


    70

	    disp_out(LEDDISP_CONTROL_CLEAR, i << 4);





okini3939

0:eae10b76cd72


    71

	    disp_out(ctrl, i << 4);





okini3939

0:eae10b76cd72


    72

	}





okini3939

0:eae10b76cd72


    73

    locate(0, 0);





okini3939

0:eae10b76cd72


    74

}





okini3939

0:eae10b76cd72


    75







okini3939

0:eae10b76cd72


    76

void I2CLEDDisp::locate(int col, int row) {





okini3939

0:eae10b76cd72


    77

	if (ctrl & LEDDISP_CONTROL_ATTRIB && (ctrl & 0x03) != LEDDISP_CONTROL_AB) {





okini3939

0:eae10b76cd72


    78

        disp_out(~0x80 & disp_in(address(x, y)), address(x, y));





okini3939

0:eae10b76cd72


    79

	    x = col;





okini3939

0:eae10b76cd72


    80

	    y = row;





okini3939

0:eae10b76cd72


    81

        disp_out(0x80 | disp_in(address(x, y)), address(x, y));





okini3939

0:eae10b76cd72


    82

	} else {





okini3939

0:eae10b76cd72


    83

	    x = col;





okini3939

0:eae10b76cd72


    84

	    y = row;





okini3939

0:eae10b76cd72


    85

	}





okini3939

0:eae10b76cd72


    86

}





okini3939

0:eae10b76cd72


    87







okini3939

0:eae10b76cd72


    88

int I2CLEDDisp::address(int col, int row) {





okini3939

0:eae10b76cd72


    89

	return ((col & 0x0c) << 2) | 0x04 | (~col & 0x03);





okini3939

0:eae10b76cd72


    90

}





okini3939

0:eae10b76cd72


    91







okini3939

0:eae10b76cd72


    92

int I2CLEDDisp::cols() {





okini3939

0:eae10b76cd72


    93

	return 4 * type;





okini3939

0:eae10b76cd72


    94

}





okini3939

0:eae10b76cd72


    95







okini3939

0:eae10b76cd72


    96

int I2CLEDDisp::rows() {





okini3939

0:eae10b76cd72


    97

	return 1;





okini3939

0:eae10b76cd72


    98

}





okini3939

0:eae10b76cd72


    99







okini3939

0:eae10b76cd72


   100

void I2CLEDDisp::disp_cfg (I2CLEDDispConfig cfg) {





okini3939

0:eae10b76cd72


   101

	int i;





okini3939

0:eae10b76cd72


   102

	





okini3939

0:eae10b76cd72


   103

	for (i = 0; i < type; i ++) {





okini3939

0:eae10b76cd72


   104

    	i2c.start();





okini3939

0:eae10b76cd72


   105

    	i2c.write(i2caddr + (i << 1));





okini3939

0:eae10b76cd72


   106

    	i2c.write(LEDDISPCFG_ENABLE | (cfg & 0x71));





okini3939

0:eae10b76cd72


   107

    	i2c.stop();





okini3939

0:eae10b76cd72


   108

	}





okini3939

0:eae10b76cd72


   109

}





okini3939

0:eae10b76cd72


   110







okini3939

0:eae10b76cd72


   111

void I2CLEDDisp::disp_out (int dat, int addr) {





okini3939

0:eae10b76cd72


   112

    i2c.start();





okini3939

0:eae10b76cd72


   113

    i2c.write(i2caddr | (addr >> 3));





okini3939

0:eae10b76cd72


   114

    i2c.write(addr & 0x07);





okini3939

0:eae10b76cd72


   115

    i2c.write(dat);





okini3939

0:eae10b76cd72


   116

    i2c.stop();





okini3939

0:eae10b76cd72


   117

}





okini3939

0:eae10b76cd72


   118







okini3939

0:eae10b76cd72


   119

int I2CLEDDisp::disp_in (int rs) {





okini3939

0:eae10b76cd72


   120

    int i;





okini3939

0:eae10b76cd72


   121







okini3939

0:eae10b76cd72


   122

    i2c.start();





okini3939

0:eae10b76cd72


   123

    i2c.write(i2caddr | (addr >> 3));





okini3939

0:eae10b76cd72


   124

    i2c.write(addr & 0x07);





okini3939

0:eae10b76cd72


   125







okini3939

0:eae10b76cd72


   126

    i2c.start();





okini3939

0:eae10b76cd72


   127

    i2c.write(i2caddr | (addr >> 3) | 0x01);





okini3939

0:eae10b76cd72


   128

    i = i2c.read(0);





okini3939

0:eae10b76cd72


   129

    i2c.stop();





okini3939

0:eae10b76cd72


   130







okini3939

0:eae10b76cd72


   131

    return i;





okini3939

0:eae10b76cd72


   132

}





okini3939

0:eae10b76cd72


   133