Diff: main.cpp

Revision:

1:10cb71a29f88

Parent:

0:bbc9cfdee3bc

--- a/main.cpp	Mon Sep 22 02:34:12 2014 +0000
+++ b/main.cpp	Tue Apr 28 17:01:47 2015 +0000
@@ -1,11 +1,110 @@
 #include "mbed.h"
 #include "EthernetInterface.h"
+#include "SDFileSystem.h"
+#include "Shell.h"
  
 #define MBED_DEV_IP       "192.168.0.52"
 #define MBED_DEV_MASK     "255.255.255.0"
 #define MBED_DEV_GW       "0.0.0.0"
 #define ECHO_SERVER_PORT   5000
 
+#define SD_MOSI PTE3
+#define SD_MISO PTE1
+#define SD_SCLK PTE2
+#define SD_CS   PTE4
+#define SD_DETECT PTE6
+
+Serial pc(PTC17,PTC16);
+SDFileSystem sd(SD_MOSI, SD_MISO, SD_SCLK, SD_CS, "sd");
+
+#define SHELL_STACK_SIZ 1024
+// Pre-allocate the shell's stack (on global mem)
+unsigned char shellStack[SHELL_STACK_SIZ];
+Shell shell(&pc);
+
+/**
+ *  \brief Gets the amount of free memory
+ *  \param none
+ *  \return none
+ **/
+static void cmd_mem(Stream * chp, int argc, char * argv[])
+{
+   // In order to get free mem within RTOS
+   // we need to get the main thread's stack pointer
+   // and subtract it with the top of the heap
+   // ------+-------------------+   Last Address of RAM (INITIAL_SP)
+   //       | Scheduler Stack   |
+   //       +-------------------+
+   //       | Main Thread Stack |
+   //       |         |         |
+   //       |         v         |
+   //       +-------------------+ <- bottom_of_stack/__get_MSP()
+   // RAM   |                   | 
+   //       |  Available RAM    |  
+   //       |                   |  
+   //       +-------------------+ <- top_of_heap
+   //       |         ^         |
+   //       |         |         |
+   //       |       Heap        |
+   //       +-------------------+ <- __end__ / HEAP_START (linker defined var)
+   //       | ZI                |
+   //       +-------------------+
+   //       | ZI: Shell Stack   |
+   //       +-------------------+
+   //       | ZI: Idle Stack    |
+   //       +-------------------+
+   //       | ZI: Timer Stack   |
+   //       +-------------------+
+   //       | RW                |  
+   // ------+===================+  First Address of RAM
+   //       |                   |
+   // Flash |                   |
+   //
+
+   uint32_t bottom_of_stack = __get_MSP();
+   char     * top_of_heap =  (char *) malloc(sizeof(char));
+   uint32_t diff = bottom_of_stack - (uint32_t) top_of_heap;
+
+   free((void *) top_of_heap);
+
+   chp->printf("Available Memory : %d bytes\r\n",
+        diff);
+}
+
+/**
+ *  \brief List Directories and files 
+ *  \param none
+ *  \return int
+ **/
+static void cmd_ls(Stream * chp, int argc, char * argv[])
+{
+   DIR * dp;
+   struct dirent * dirp;
+   FILINFO fileInfo;
+   char dirroot[256];
+   
+   if (argc >= 1)
+       sprintf(dirroot, "/sd/%s", argv[0]);
+   else
+       sprintf(dirroot, "/sd");
+   
+   chp->printf("Listing directory [%s]\r\n", dirroot);
+   
+   dp = opendir(dirroot);           
+   while((dirp = readdir(dp)) != NULL)
+   {
+       if (sd.stat(dirp->d_name, &fileInfo) == 0)
+       {
+           if (fileInfo.fattrib & AM_DIR )
+                   chp->printf("<DIR>\t\t");
+           else
+                   chp->printf("%ld\t\t", fileInfo.fsize);
+       }
+       chp->printf("%s\r\n", dirp->d_name);
+   }
+   closedir(dp);
+}
+
  
 int main (void) {
     EthernetInterface eth;
@@ -16,7 +115,15 @@
     TCPSocketServer server;
     server.bind(ECHO_SERVER_PORT);
     server.listen();
+
+    // Start the shell
+    pc.printf("Starting debug shell ...\r\n");
+    shell.addCommand("ls", cmd_ls);
+    shell.addCommand("mem", cmd_mem);
+    // Start the thread statically (separate stack)
+    shell.start(osPriorityNormal, SHELL_STACK_SIZ, shellStack);
     
+        
     while (true) {
         printf("\nWait for new connection...\n");
         TCPSocketConnection client;