Changeset 758 for trunk/softs/tsar_boot/drivers/reset_tty.c

Timestamp:

Jul 24, 2014, 3:19:18 PM (10 years ago)

Author:

cfuguet

Message:

tsar_boot: improving configuration infrastructure

• Using hard_config.h which respects the same sintax that the hard_config.h file of all TSAR platforms. This file can be then generated by the GIET-VM genmap tool or written manually.

• All peripheral drivers have been moved to a drivers directory and they are compiled as a static library. This allows GCC to only include in the final .ELF the object files of used peripherals and not all of them.

• Example hard_config.h and ldscripts have been introduced in the conf directory.

• Improving comments in all files

Location:

trunk/softs/tsar_boot/drivers

Files:

• . (added)
• reset_tty.c (moved) (moved from trunk/softs/tsar_boot/src/reset_tty.c) (6 diffs)

trunk/softs/tsar_boot/drivers/reset_tty.c

@@ -2 +2 @@
  * \file    reset_tty.c
  * \date    5 mars 2014
- * \author  Cesar Fuguet 
+ * \author  Cesar Fuguet
  *
- * Minimal driver for TTY controler 
+ * Minimal driver for TTY controler
  *******************************************************************/
 
@@ -11 +11 @@
 #include <defs.h>
 
+#ifndef SEG_TTY_BASE
+#   error "SEG_TTY_BASE constant must be defined in the hard_config.h file"
+#endif
+
+static int* const tty_address = (int* const)SEG_TTY_BASE;
+
+enum tty_registers {
+    TTY_WRITE   = 0,
+    TTY_STATUS  = 1,
+    TTY_READ    = 2,
+    TTY_CONFIG  = 3,
+
+    TTY_SPAN    = 4,
+};
+
 ///////////////////////
 int reset_getc(char *c)
 {
-    unsigned int* tty_address = (unsigned int*) TTY_PADDR_BASE;
-
     if (ioread32( &tty_address[TTY_STATUS] ) == 0) return 0;
     *c = ioread32( &tty_address[TTY_READ] );
@@ -24 +37 @@
 void reset_putc(const char c)
 {
-    unsigned int* tty_address = (unsigned int*) TTY_PADDR_BASE;
-
     iowrite32( &tty_address[TTY_WRITE], (unsigned int)c );
     if (c == '\n') reset_putc( '\r' );
@@ -31 +42 @@
 
 ///////////////////////////////////
-void reset_puts(const char *buffer) 
+void reset_puts(const char *buffer)
 {
     unsigned int n;
@@ -40 +51 @@
         reset_putc(buffer[n]);
     }
-} 
+}
 
 /////////////////////////////////
@@ -54 +65 @@
 
     for ( c = 0 ; c < 8 ; c++ )
-    { 
+    {
         buf[9-c] = HexaTab[val&0xF];
         val = val >> 4;