Adding dual channel to scope example, fixing logic and QT source code.

Examples/ADC/Scope-QT-src/jz47xx_mmap.cpp

@@ -0,0 +1,39 @@
+/*
+ * JZ47xx GPIO lines
+ *
+ * Written 2010 by Andres Calderon andres.calderon@emqbit.com
+ */
+
+#include <stdio.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <jz47xx_mmap.h>
+
+
+unsigned int *
+jz_mmap (off_t address)
+{
+  int fd;
+
+  unsigned int *pio;
+
+  if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
+    {
+      fprintf (stderr, "Cannot open /dev/mem.\n");
+      return 0;
+    }
+
+  pio = (unsigned int *) mmap (0, getpagesize (), PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
+
+  if (pio == (unsigned int *) -1)
+    {
+      fprintf (stderr, "Cannot mmap.\n");
+      return 0;
+    }
+
+  return pio;
+}