Jon Trinder / Mbed 2 deprecated JonsDebugTerminal

When debugging code it can be handy to examine/alter variables and to check the state of input lines. So your main program can run and you have access to alter variables and run functions from a terminal. In this sample the main program is just a loop that flashes an LED. In that loop a periodic call is made to ShellTC which handles any commands from the serial terminal. The code is a bit quirky(it was originally written for a very resource limited device) but it works well enough to be useful, hence its published. More details in the main.cpp

Dependencies:   mbed

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Diff: sio.cpp

Revision:
0:87e65dabdb95
Child:
1:329a8125838a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sio.cpp	Thu Oct 25 21:57:40 2012 +0000
@@ -0,0 +1,141 @@
+/* Copyright (c) <year> <copyright holders>, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+/*
+sio handler august 96
+*/
+//(c)jont@ninelocks.com 1992-2012
+#include "string.h"
+#include <stdio.h>
+#include <ctype.h>
+
+#include "mbed.h" //fiddle
+
+#define XON     0x11
+#define XOFF    0x13
+
+
+//why do we end up defineing true and false
+
+#define combuffsize  16                       
+void sioRXHandler(void);
+//horrible as this is platform depdndent but for now
+Serial pc(USBTX, USBRX); // tx, rx
+
+
+int commandWaiting;    /* flag to indicate if data in buffer */
+char comBuff[combuffsize];    /* space for commands yeh its small make bigger if you need to */
+int comBuffIndex;    /* buffer index       */
+unsigned char JPORTOK0;
+
+void serialInit(void)
+{
+    JPORTOK0 = 0;
+    pc.attach(&sioRXHandler);
+   //  pc.printf("Hello World!");
+
+}
+
+/*======================================================================*/
+/* Get a character into our buffer                */
+/*======================================================================*/
+/* read single character into command buffer */
+void sioGetSingle(void)
+{
+
+
+
+//char theChar;
+char theChar = 0x00; //used to be a char...
+//h8    theChar = SIO_RDR;        /* get received character */
+//theChar = pc.getc();
+theChar = LPC_UART0->RBR; //oct2012 expereiment
+//
+//see this for reg names http://mbed.org/users/4180_1/notebook/cc-io-register-names/
+ do {
+            } while ((LPC_UART0->LSR & 0x20)==0) ;
+//write character to UART
+            LPC_UART0->THR = theChar ;
+
+    //theChar = RCREG;    //PIC
+   // theChar = 0x42;    //TODO2k12 this needs to be whats read from sio RXREG
+    /* if an Xoff was received from
+    remote term telling us to stop...
+    in which case if anything other than an xon is receievd
+    we'll get caught as cant send due to xoff and cant get an irq
+    as were already in one */
+
+    switch(theChar)
+        {
+        case (XOFF):
+            JPORTOK0 = 0xff; ;break; /* busy     */
+        case (XON):
+            JPORTOK0 = 0x00; ;break; /* not busy */
+        case ('?'):        
+           comBuffIndex = 0; comBuff[0] ='\0';
+        //   printf("\n\r>?"); break; /* start of enq com */    
+        default:        break;    
+    }
+
+    if (theChar != XON && theChar != XOFF && theChar != '?')
+    {
+        if (comBuffIndex >= combuffsize - 1)
+        {
+            comBuffIndex = combuffsize - 1;
+        }
+
+/* jt need to force upper case ?? also add set functions */        
+        comBuff[comBuffIndex] = toupper(theChar);
+        if (theChar == 0x0d)
+        {
+            comBuff[comBuffIndex] = '\0';    /* null terminate it */    
+        }
+            comBuffIndex++;    /* inc index for next time */
+
+    /* we use to check for 2 chhars as well */
+            if (theChar == 0x0d )
+        {
+           commandWaiting = true; /* set flag */    
+           comBuffIndex = 0;        
+        }        
+
+    }
+
+}
+
+///should normally be called by an irq that notices incoming characters
+/*======================================================================*/
+/* sioRXHandler               */
+/*======================================================================*/
+//used to work great for one character recived, but not with mbed, so lets see if its 
+//got multi characyters before it call the irq
+void sioRXHandler(void)
+{
+
+//see http://mbed.org/forum/mbed/topic/3414/?page=1#comment-17231
+   while (pc.readable() == 1){
+  // jtdebug();
+     sioGetSingle();
+     uint32_t UART_0_RBR = LPC_UART0->RBR;  
+    
+  }
+  //http://mbed.org/forum/mbed/topic/408/?page=1#comment-2221
+ // pc.putc(0x00);
+ 
+ uint32_t UART_0_RBR = LPC_UART0->RBR;  
+    
+}