Diff: main.cpp

Revision:

0:d024d4d62f2e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jun 03 15:46:55 2020 +0000
@@ -0,0 +1,83 @@
+/* ADコンバータであるMCP3204を使い，圧力センサP-7100からデータを取得するためのコード */
+
+#include "mbed.h"
+
+SPI spi(p5, p6, p7);
+DigitalOut cs(p8);
+Timer t;
+
+Serial pc(USBTX, USBRX);
+
+int main()
+{
+    // ADC val
+    uint8_t high, low;
+    double value, v, tp;
+    
+    //file val
+    int i = 0, j = 0, k = 1000;
+    double V[k], TP[k],T[k];
+    
+    spi.format(7, 0);
+    spi.frequency(1000000);
+    
+    pc.baud(460800);
+    
+    pc.printf("start!\n");
+    
+    t.start();
+    
+    while(j < 20)
+    {
+    
+    while(i < k)
+    {
+        cs = 0;
+        
+        spi.write(0x60); //シングル
+        //spi.write(0x40); //差動
+        
+        high = spi.write(0x00);
+        low = spi.write(0x00);
+        
+        low = (high << 5) | (low >> 2);
+        high = high >> 3;
+        
+        value = (high << 8) | low;
+        
+        v = value / 4096 * 5.0;
+        
+        tp = 0.25 * v - 0.125;
+        
+        V[i] = v;
+        TP[i] = tp;
+        T[i] = t.read();
+        
+        //pc.printf("sensor 0 value = %lf\n", value);
+        
+        cs = 1;
+        
+        i++;
+        
+        wait(0.009);
+    }
+    
+    i  = 0;
+    
+    while(i < k)
+    {
+        pc.printf("%f, %f, %f\n", T[i], V[i], TP[i]);
+        
+        i++;
+    }
+    
+    i = 0;
+    
+    j++;
+    
+    }
+    
+    t.stop();
+    
+    pc.printf("finish!");
+}