Diff: main.cpp

Revision:

0:1a55aa7b10a5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon May 03 05:18:29 2021 +0000
@@ -0,0 +1,96 @@
+#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)
+
+//アナログ入力の設定
+AnalogIn adc_vbat(A3); //PA_4
+//AnalogIn adc_vbat(A0); //767
+
+#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);
+} //ch_hex_a
+
+int ii;  //ループカウンタ
+int s;   //アナログ読み取り値
+
+int main()
+{
+    //printf("767\r\n"); //767
+    //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
+    
+    //無限ループ
+    while (1) {
+        //液晶のクリア
+        i2c.write(ADDR_LCD,INIT_cls,2);wait_ms(2);
+
+        //adcの読み込み 0から4096
+        s = (adc_vbat.read_u16()>>4);
+        
+        //電圧を温度に変換 ex 20.0 -> 200 温度の十倍を出力
+        s=((s-496)*27081)>>16;
+
+        //小数点以上と小数点以下を分ける
+        ii=DVI10(s);  // 10の桁
+        s =(s-(ii*10))*10; //  1の桁
+        
+        //温度の小数点以上の表示
+        i2c.write(ADDR_LCD, ch_hex_a( ii ) ,4);
+
+       //温度の小数点以下の表示
+        ch_hex_a( s );
+        ch_hex_a_b[1] = '.';
+      //ch_hex_a_b[2] = '0' + s;
+        ch_hex_a_b[3] = 'C';
+        i2c.write(ADDR_LCD, ch_hex_a_b ,4);
+
+        //1秒待つ
+        wait_ms(1000);
+
+    }//while
+
+}//main
+
+//容量削減
+void error(const char* format, ...){}