MAX6954 or 6955 Help

[jayanth.devarayanadurga]

Can somebody provide MAX6955 or 6954 initialization routine. I need to drive 8 X 16-Segment displays.

Edit: I found this C++ Code. Can somebody translate it to C Code? I found this code at mbed.com

https://mbed.org/users/lonesometraveler/code/MAX6955/rev/

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Code C - [expand]
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#include "MAX6955.h"
 
MAX6955::MAX6955(PinName sda, PinName scl, char driver): i2c_(sda, scl), driver_(driver){}
 
int MAX6955::write(char command, char data){
    char i2cData[2];
    i2cData[0] = command;
    i2cData[1] = data;
    int result = i2c_.write(driver_, i2cData, 2);
    wait(0.07);
    return result;
}
 
int MAX6955::writeS(char* buffer){
    int result = i2c_.write(driver_, (char *) buffer, 8);
    wait(0.07);
    return result;
}
 
int MAX6955::init(){
    int result = 0;
    result = result + write(reg_decodeMode, 0x00);
    result = result + write(reg_scanLimit, 0x07);
    result = result + write(reg_configuration, 0x21);
    result = result + write(reg_globalIntensity, 0x08);
    result = result + write(reg_digitType, 0xFF);
    result = result + write(reg_displayTest, 0x00);
    return result;
}

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Code C - [expand]
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#ifndef MAX6955_H
#define MAX6955_H
 
#include "mbed.h"
 
#define reg_noOp 0x00
#define reg_decodeMode 0x01
#define reg_globalIntensity 0x02
#define reg_scanLimit 0x03
#define reg_configuration 0x04
#define reg_displayTest 0x07
#define reg_digitType 0x0C
 
#define reg_intensity10 0x10
#define reg_intensity32 0x11
#define reg_intensity54 0x12
#define reg_intensity76 0x13
#define reg_intensity10a 0x14
#define reg_intensity32a 0x15
#define reg_intensity54a 0x16
#define reg_intensity76a 0x17
 
#define USE_GLOBAL 0x00
#define USE_DISCRETE 0x40
#define RUN 0x01
#define SHUTDOWN 0x00
 
#define reg_digit0 0x60
#define reg_digit1 0x61
#define reg_digit2 0x62
#define reg_digit3 0x63
#define reg_digit4 0x64
#define reg_digit5 0x65
#define reg_digit6 0x66
#define reg_digit7 0x67
#define reg_digit0a 0x68
#define reg_digit1a 0x69
#define reg_digit2a 0x6A
#define reg_digit3a 0x6B
#define reg_digit4a 0x6C
#define reg_digit5a 0x6D
#define reg_digit6a 0x6E
#define reg_digit7a 0x6F
 
class MAX6955{
    public:
        /* 
         * @param sda mbed pin for I2C SDA
         * @param scl mbed pin for I2C SCL
         * @param driver I2C device address
         */
        MAX6955(PinName sda, PinName scl, char driver);   
        int write(char command, char data);
        int writeS(char* buffer);
        int init(void);
        
    private:
        I2C i2c_;
        char driver_;
};
 
#endif

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Somebody please explain these lines.

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Code C++ - [expand]
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MAX6955::MAX6955(PinName sda, PinName scl, char driver): i2c_(sda, scl), driver_(driver){}
 
int result = i2c_.write(driver_, i2cData, 2);
 
private:
        I2C i2c_;
        char driver_;

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Edit:

I got CCS C Code. Can somebody translate this to mikroC Code?

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Code C - [expand]
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#define MAX6955BaseAddress 0b11000000 
 
#define reg_noOp 0x00 
#define reg_decodeMode 0x01 
#define reg_globalIntensity 0x02 
#define reg_scanLimit 0x03 
#define reg_configuration 0x04 
#define reg_displayTest 0x07 
#define reg_digitType 0x0C 
 
#define reg_intensity10 0x10 
#define reg_intensity32 0x11 
#define reg_intensity54 0x12 
#define reg_intensity76 0x13 
#define reg_intensity10a 0x14 
#define reg_intensity32a 0x15 
#define reg_intensity54a 0x16 
#define reg_intensity76a 0x17 
 
#define USE_GLOBAL 0x00 
#define USE_DISCRETE 0x40 
#define RUN 0x01 
#define SHUTDOWN 0x00 
 
#define reg_digit0 0x60 
#define reg_digit1 0x61 
#define reg_digit2 0x62 
#define reg_digit3 0x63 
#define reg_digit4 0x64 
#define reg_digit5 0x65 
#define reg_digit6 0x66 
#define reg_digit7 0x67 
#define reg_digit0a 0x68 
#define reg_digit1a 0x69 
#define reg_digit2a 0x6A 
#define reg_digit3a 0x6B 
#define reg_digit4a 0x6C 
#define reg_digit5a 0x6D 
#define reg_digit6a 0x6E 
#define reg_digit7a 0x6F 
 
void writeMAX6955(unsigned char, unsigned char, unsigned char); 
void initMAX6955(unsigned char); 
 
void writeMAX6955(unsigned char driver, unsigned char command, unsigned char data) 
{ 
   i2c_start(); 
   i2c_write(MAX6955BaseAddress + (driver<<1)); 
   i2c_write(command); 
   i2c_write(data); 
   i2c_stop(); 
} 
 
void initMAX6955(unsigned char driver) 
{ 
   writeMAX6955(driver, reg_decodeMode, 0x00); 
   writeMAX6955(driver, reg_scanLimit, 0x07); 
   writeMAX6955(driver, reg_configuration, (RUN|USE_DISCRETE)); 
   writeMAX6955(driver, reg_globalIntensity, 0x0F); 
   writeMAX6955(driver, reg_digitType, 0x00); 
   writeMAX6955(driver, reg_displayTest, 0x01); 
   delay_ms(1000); 
   writeMAX6955(driver, reg_displayTest, 0x00); 
}

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Can somebody tell what should be the values of driver, command, and data? I need to display HI on 16 segment displays. I also need the connections.

 

[jayanth.devarayanadurga]

Now I am trying this Code. **broken link removed**

Can somebody check what the problem is. It is not working. I am attaching CCS C Code and Proteus File.

**broken link removed**

Edit: I am attaching a working code. Can somebody modify it so that it displays string "230.145 V".