Diff: main.cpp

Revision:

0:d94b2f254fe3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Oct 17 07:42:09 2021 +0000
@@ -0,0 +1,73 @@
+#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)
+
+//1000の割り算 だいたい正しい
+#define DVI1000(n) ((n>>10)+(((n>>10)*32)>>10))
+
+#define HIGH 1
+DigitalIn in1(PA_1);
+
+DigitalOut led1(PA_4); //debug
+
+RawSerial pc(PA_2, PA_3); //010 tx, rx
+
+//タイマーの設定
+Timer t;
+
+//in1のオン時間をusで測る　今のところ引数は、無効
+int pulseIn(int pin1,int pu1,int timeout1)
+{
+    t.reset();
+
+    //while(in1 != 0) {}
+
+    loop_ins:
+    //                      1234567890123456
+    if (   (GPIOA->IDR) & 0b0000000000000010   ) { goto loop_ins;}
+
+    //while(in1 == 0) {}
+
+    loop_s1:
+    //                            1234567890123456
+    if (     (~(GPIOA->IDR))  & 0b0000000000000010    ) { goto loop_s1;}
+
+    //led1 = 1;//debug
+
+    int sd = t.read_us();
+
+
+    //while(in1 != 0) {}
+
+    loop_in1:
+    //                      1234567890123456
+    if (   (GPIOA->IDR) & 0b0000000000000010   ) { goto loop_in1;}
+
+    //led1 = 0;//debug
+
+    return(t.read_us()-sd);
+
+}//pulseIn
+
+int main() {
+
+    t.start(); //pulseInで必要
+
+    int pwmco2; //onの間隔 us
+
+    //無限ループ
+    while(1){
+
+        //PWMでデータ取得
+        pwmco2=pulseIn(7 ,HIGH,2000000);
+        //pwmco2=82000; //debug
+        printf("The time taken was %d seconds\r\n", pwmco2  );
+        printf("The time taken was %d seconds\r\n", DVI1000(pwmco2)  );
+
+        //0.1秒待つ
+        wait_ms(100);
+
+    }//while
+
+}//main