STM32F767とMCP3425でなんちゃってluxを液晶表示(MCP3425A0T-E/CH 16bitADC)(明るさ)

STM32L010用に軽量コンパクト

構成
STM32G031J6M6
MCP3425A0T-E/CH
NJL7502L
AQM0802A

1.SCLとSDAを接続、プルアップも忘れずに
2.電源の接続
3.下記のソースコードを書き込む
4.コンパイル実行で表示されたら終了
5.おわり

#include "mbed.h"

#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;

    if( l_num >= 400 ) {
        a=4;b=0;c=0;
 
    } else if( l_num >= 300) {
        a=3;b=(l_num-300) / 10;c=l_num % 10;

    } else if( l_num >= 200) {
        a=2;b=(l_num-200) / 10;c=l_num % 10;
        
        
        
    } else if( l_num >= 100) {
        a=1;b=(l_num-100) / 10;c=l_num % 10;
    } else {
        a=0;b= l_num / 10;c=l_num % 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);

        //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);
        //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);
        
        i2c.write(ADDR_LCD, ch_hex_a( p ) ,4);

        wait_ms(1000);
    }//while

}//main