Adding PS2, capacitive keyboard examples

cap_keyboard/src/user_space/jz47xx_mmap.c

@@ -0,0 +1,64 @@
+/*
+ * 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>
+
+
+void *
+jz_mmap (off_t address)
+{
+  int fd;
+
+  void *pio;
+
+  if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
+    {
+      fprintf (stderr, "Cannot open /dev/mem.\n");
+      return 0;
+    }
+
+  pio = (void *) mmap (0, getpagesize (), PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
+
+  if (pio == (void *) -1)
+    {
+      fprintf (stderr, "Cannot mmap.\n");
+      return 0;
+    }
+
+  return pio;
+}
+
+void *
+jz_fpga_map (off_t address)
+{
+  int fd;
+
+  void *fpga;
+
+  if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
+    {
+      fprintf (stderr, "Cannot open /dev/mem.\n");
+      return 0;
+    }
+
+  fpga = (void *) mmap (0, FPGA_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
+
+  if (fpga == (void *) -1)
+    {
+      fprintf (stderr, "Cannot mmap.\n");
+      return 0;
+    }
+
+  return fpga;
+}
+