File content as of revision 0:452bfcde2612:

#include "mbed.h"

//10の割り算 0から1028までは、正しい。主に0から999
#define DVI10(n) ((n*205)>>11)

AnalogIn adc_vbat(A3); //PA_4

#define ADDR        (0xD0)   //  address
#define ADDR_LCD    (0x7C)   //  address

//I2C i2c(I2C_SDA, I2C_SCL); //767
//I2C i2c(dp5, dp27); //1114
I2C i2c(PA_10, PA_9); //010

char    data_read[8];   //i2cバッファー

char INIT_com[]={0x0,0x38,
0x0,0x39,
0x0,0x4,
0x0,0x14,
0x0,0x70,
0x0,0x56,
0x0,0x6C,
0x0,0x38,
0x0,0xC,
0x0,0x1,
0x40,0x41};

char INIT_cls[]={0x0,0x1};

char ch_hex_a_b[5];
char *ch_hex_a(int l_num)
{
    int a,b,c;

    b=DVI10(l_num);
    c=l_num-(b*10);
    l_num=b;
    a=DVI10(l_num);
    b=l_num-(a*10);

    ch_hex_a_b[0] = '@';
    ch_hex_a_b[1] = '0' + a;
    ch_hex_a_b[2] = '0' + b;
    ch_hex_a_b[3] = '0' + c;
    ch_hex_a_b[4] = 0;

    return(ch_hex_a_b);
}

int ii;     //ループカウンタ

int main()
{
    //液晶の初期化
    for(ii=0;ii<11;ii++){
        i2c.write(ADDR_LCD, &INIT_com[ii*2], 2);wait_ms(2);
    } //for

//    i2c.write(ADDR, "\230", 1); //16bit 15sps PGA x1

    int p,s;
    while (1) {
        //液晶のクリア
        i2c.write(ADDR_LCD,INIT_cls,2);wait_ms(2);

    //adcの読み込み
        s = (adc_vbat.read_u16()>>4);

    //  (4096*165)/2048=330 電圧の100倍に変換
    //s = 13;
    p = (s*165) >> 11; 

//        //データの読み込み
//        i2c.read(ADDR | 1, data_read, 2);
//        
//        s = (data_read[0] * 256 ) + data_read[1];
//        //s = 32767;
//        //printf("-s=%d\r\n",s); //767
//        //printf(" h=%d\r\n",data_read[0] * 256 );
//        //printf(" l=%d\r\n",data_read[1]);
//
//        // 32768/(163.84/2)=400 luxに変換
//        p=( ((s>>5)*6)  + (s>>7)  ) >> 4;
//        //printf(" p=%d\r\n",p); //767
        
        i2c.write(ADDR_LCD, ch_hex_a( p ) ,4);

        wait_ms(1000);
    }//while

}//main

void error(const char* format, ...){}