STM32G031とMCP9701で温度をシリアルに出力 (UnbufferedSerial)(テーブル方式)

x MCP9701-E/TO 販売コード 103199

x 超超重要 なぜか秋月STM32G031J6M6がうり切れていた。注意!!(2022/8/27現在)

x 過去ログを見よ
x PA_2をOBでGPIOに出来る人むけ
x STM32G031は、秋月で売っているSTM32G031J6M6の事

目的
秋月で売っている安価なMCP9701(約25円)を使って温度を出力する。
なぜこうなったかは、MCP9701のログをみて
センター400mV,ステップ19.5mV/1℃

//SER_MCP9701_table_031_1


//温度

static const char tmp_t[]= {
    0*2+0,0*2+1,0*2+1,
    1*2+0,1*2+1,1*2+1,
    2*2+0,2*2+1,2*2+1,
    3*2+0,3*2+1,3*2+1,
    4*2+0,4*2+1,4*2+1,
    5*2+0,5*2+1,5*2+1,
    6*2+0,6*2+1,6*2+1,
    7*2+0,7*2+1,7*2+1,
    8*2+0,8*2+1,8*2+1,
    9*2+0,9*2+1,9*2+1,
    10*2+0,10*2+1,10*2+1,
    11*2+0,11*2+1,11*2+1,
    12*2+0,12*2+1,12*2+1,
    13*2+0,13*2+1,13*2+1,
    14*2+0,14*2+1,14*2+1,
    15*2+0,15*2+1,15*2+1,
    16*2+0,16*2+1,16*2+1,
    17*2+0,17*2+0,17*2+1,
    18*2+0,18*2+0,18*2+1,
    19*2+0,19*2+0,19*2+1,
    20*2+0,20*2+0,20*2+1,
    21*2+0,21*2+0,21*2+1,
    22*2+0,22*2+0,22*2+1,
    23*2+0,23*2+0,23*2+1,
    24*2+0,24*2+0,24*2+1,
    25*2+0,25*2+0,25*2+1,
    26*2+0,26*2+0,26*2+1,
    27*2+0,27*2+0,27*2+1,
    28*2+0,28*2+0,28*2+1,
    29*2+0,29*2+0,29*2+1,
    30*2+0,30*2+0,30*2+1,
    31*2+0,31*2+0,31*2+1,
    32*2+0,32*2+0,32*2+1,
    33*2+0,33*2+0,33*2+1,
    34*2+0,34*2+0,34*2+1,
    35*2+0,35*2+0,35*2+1,
    36*2+0,36*2+0,36*2+1,36*2+1,
    37*2+0,37*2+1,37*2+1,
    38*2+0,38*2+1,38*2+1,
    39*2+0,39*2+1,39*2+1
};


static const char data[][5]= {
    "00.0","00.5","01.0","01.5","02.0","02.5","03.0","03.5","04.0","04.5","05.0","05.5","06.0","06.5","07.0","07.5","08.0","08.5","09.0","09.5",
    "10.0","10.5","11.0","11.5","12.0","12.5","13.0","13.5","14.0","14.5","15.0","15.5","16.0","16.5","17.0","17.5","18.0","18.5","19.0","19.5",
    "20.0","20.5","21.0","21.5","22.0","22.5","23.0","23.5","24.0","24.5","25.0","25.5","26.0","26.5","27.0","27.5","28.0","28.5","29.0","29.5",
    "30.0","30.5","31.0","31.5","32.0","32.5","33.0","33.5","34.0","34.5","35.0","35.5","36.0","66.5","37.0","37.5","38.0","38.5","39.0","39.5"
};


#include "mbed.h"

//シリアルの定義
UnbufferedSerial serial_port(PA_2, PA_3); //031

//アナログ入力の設定
AnalogIn adc_vbat(PB_7); //PB_7 ADC1/11


//メイン関数
int main()
{

    //シリアルの初期化
    serial_port.baud(9600);
    serial_port.format(
        /* bits */ 8,
        /* parity */ SerialBase::None,
        /* stop bit */ 1
    );

    //無限ループ
    while(1) {

        //センサーのADC値を0から512に変換
        int s = (int)(adc_vbat.read() * 512.0);
 
        //温度の表示
        //s = (s >> 3);
        if(s >= 184) {
            serial_port.write("40.0", 4);
        } else if(s <= 62) {
            serial_port.write("-0.0", 4);
        } else {
            serial_port.write(data[tmp_t[s-63]], 4);
        }
        serial_port.write("\r\n", 2);

        //1秒待つ
        wait_us(1000*1000);

    } //while

} //main