Revision 0:c571c0b21eb7, committed 2015-08-17

Comitter:

Mr_What

Date:

Mon Aug 17 14:20:36 2015 +0000

Commit message:

working tester for bluetooth input

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 17 14:20:36 2015 +0000
@@ -0,0 +1,79 @@
+#include "mbed.h"
+
+DigitalOut myled(LED_GREEN);
+Serial PC(USBTX, USBRX);
+Serial BT(PTC15, PTC14);  // for Bluetooth module header
+
+#define RINGBUF
+#ifdef RINGBUF
+#define CMDBUFLEN 128
+int cbuf[CMDBUFLEN];
+static int bufIn=0;
+static int bufOut=0;
+void gotChar() {
+    int c = BT.getc();
+    cbuf[bufIn % CMDBUFLEN]=c;
+    bufIn++;
+    // prevent byte count overflow
+    //   WARNING:  if there is a race and this thread resets counts...
+    //              counts could look funny for a bit, but since bufIn
+    //              decrements before bufOut, one hopes that the glitch will not be problematic.
+    //       On race, bufIn < bufOut, they will think buffer is empty until next time
+    //       they check, when count will be OK
+    if (bufIn > 202*CMDBUFLEN) {
+        bufIn  -= 200*CMDBUFLEN;
+        bufOut -= 200*CMDBUFLEN;
+    }    
+}
+#endif
+
+void heartbeat() {
+    static int i=0;
+    PC.printf("%d \r", i++); // print the value of variable i
+    myled = !myled; // toggle a led
+}
+
+int main()
+{
+    BT.baud(57600);   // set to match your bluetooth-serial module
+    PC.baud(115200);
+    //int i = 0;
+    BT.printf("Hello World!\n");
+    PC.puts("Ready\r");
+#ifdef RINGBUF
+    BT.attach(&gotChar);
+#endif
+
+    Ticker HeartBeat;
+    HeartBeat.attach(heartbeat,0.8f);
+
+    while (true) {
+        wait(0.5f); // wait a small period of time
+
+#ifdef RINGBUF
+        int n = bufIn - bufOut;
+        if (n>0) {
+            PC.putc('\n');
+            if ((n > CMDBUFLEN-3) && (n < CMDBUFLEN*180))
+                PC.printf("\r\n\tserial command input overflow warning!\r\n");
+
+            while (bufOut < bufIn) {
+                int c = cbuf[bufOut % CMDBUFLEN];
+                //PC.printf("\r\t%d got %d(%c)\r\n",bufOut++,c,c);
+                if ((c=='\r')||(c=='\n')||(c==0)) PC.putc('\n');
+                else PC.putc(c);
+                bufOut++;
+            }
+            PC.putc('\n');
+        }
+#else
+        int n = PC.readable();
+        PC.printf("\n\n%d readable ",n);
+        while(n>0) {
+            int c = PC.getc();
+            PC.printf("\n got %d(%c)\n",c,c);    
+            n = PC.readable();
+        }
+#endif
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Aug 17 14:20:36 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/bad568076d81
\ No newline at end of file