Diff: main.cpp

Revision:

0:fdabc5739b6c

Child:

1:2aadc0008662

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jun 24 15:42:58 2019 +0000
@@ -0,0 +1,52 @@
+#include "mbed.h"
+
+DigitalIn spiin(p5);
+//SPISlave slave(PTA7,PTA6,PTB0,PTA5);
+SPISlave slave(p5,p6,p7,p8);
+AnalogIn ain1(p20);
+//SPISlave slave(p11,p12,p13,p14);
+
+Serial pc(USBTX, USBRX);
+#define VER "1.34"
+
+int main() {
+    spiin.mode(PullUp);
+    slave.format(8,0);
+    slave.frequency(1000000);
+    int v, res,res2;
+    int cnt=0;
+    int slvrecnt=0;
+
+    pc.printf(" start spi slave test %s   \n\r",VER );     
+    slave.reply(0);    // is in the example ? 
+    float  sample=0;
+    int slavereply;
+    while(1) {
+        cnt++;
+        //if( (cnt % 10000000) ==0)   pc.printf("%s loop : cnt %d , slvrsv cnt %d\n\r",VER,cnt, slvrecnt);
+        sample=200*ain1.read();
+        if(slave.receive()) {       
+            v = slave.read();   // Read byte from master
+            if(v!=0){// discard the dummy buffer write
+                //res=(v+5);     // Add 5 to it
+                res=slvrecnt%256;
+               // res=0x13;
+                slavereply=(int)sample;
+                slave.reply(slavereply);// Make this the next reply
+                
+               //pc.printf("v=%x res= %x\n\r", v,slavereply);
+                slvrecnt++;
+            }
+            else {
+                res2=cnt%256;    
+                slave.reply(res2);         // Make this the next reply
+                slvrecnt=0;
+                //pc.printf("v=%d   res2 = %x\n\r", v , res2);
+            }
+            //pc.printf( "slave receive done  \n\r");
+            //}
+        }
+    } 
+
+
+}
\ No newline at end of file