Diff: main.cpp

Revision:

0:cf99a7b873b3

Child:

2:57a6c415e495

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 14 08:50:32 2015 +0000
@@ -0,0 +1,124 @@
+#include "mbed.h"
+#include "jtlcd.h"
+#include "Counter.h"
+
+
+float coolant;
+int int_coolant = 0;
+void callback_reed(void);
+void siphon_data();
+
+DigitalOut myled(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut myled4(LED4);
+
+ 
+DigitalIn reed(p9); //would default to in but we wanna play with its mode
+Counter counter_reed(p9, callback_reed ); //setup the counter to use pin 9
+
+void sioRXHandler(void);
+#define combuffsize  256  
+char comBuff[combuffsize];   /* space for commands yeh its small make bigger if you need to */
+int comBuffIndex;           /* buffer index       */
+
+char lineBuffer[32]; //for saving data for the lcd display
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+/*=====================================================================================*/
+//
+// callback funtions mostly for the counters
+//
+/*=====================================================================================*/
+/*=====================================================================================*/
+// callback for the reed switch input
+// puts logentry into the ringbuffer
+/*=====================================================================================*/
+void callback_reed()
+{
+    time_t seconds = time(NULL);    
+    //LPC_RTC->GPREG3 = counter_reed.read();
+    __disable_irq();    // Disable Interrupts
+    comBuffIndex = 0;
+    __enable_irq();
+    pc.putc('A');
+
+}
+
+void serialInit(void)
+{  
+    pc.attach(&sioRXHandler);
+}
+
+
+/*======================================================================*/
+/* sioRXHandler               */
+/*======================================================================*/
+/*
+This is inefficient and long handed but makes explaining it to someone
+easier.
+
+Which is the point, to be understandable at this stage :-)
+
+
+If more data received than buffer length we throw it away!
+*/
+void sioRXHandler(void)
+{
+char theChar = 0x00;
+myled2 = 1;
+myled3 = 1;
+    while (pc.readable()){
+        theChar = pc.getc();
+        pc.putc(theChar); //echo it back 
+        if (comBuffIndex >= combuffsize - 1)
+        {
+            comBuffIndex = combuffsize - 1;
+        }
+        comBuff[comBuffIndex] = theChar;
+        comBuffIndex++;
+  }
+  myled2 = 0;
+}
+ 
+/*======================================================================*/
+/* Main            */
+/*======================================================================*/
+int main() {
+     setbuf(stdout, NULL);
+    // no buffering for this filehandle, this stop the weird
+    //behaviour with things not being dfiplaye untill a character was received.
+    serialInit();
+    reed.mode(PullUp);   
+    
+    LcdInit();
+    LcdHomeTop();
+    LcdWriteTextLine("GM0HYY");
+    LcdHomeBottom();
+    LcdWriteTextLine("Hello World");
+    while(1) {
+         siphon_data();
+        myled = 1;
+        wait(0.2);
+        myled = 0;
+        wait(0.2);
+        LcdHomeBottom();
+        sprintf(lineBuffer,"%.3f %04X %3d", coolant, int_coolant, counter_reed.read());
+        LcdWriteTextLine(lineBuffer);
+    }
+}
+
+void siphon_data(){
+__disable_irq();    // Disable Interrupts
+
+int_coolant = 0;
+    if(comBuffIndex > 24){     
+       int_coolant = comBuff[23];
+       int_coolant <<= 8;
+       int_coolant |= comBuff[22];
+       coolant = (int_coolant-320) * 0.05555;
+    }
+__enable_irq();   
+     
+}
\ No newline at end of file