Changes between Version 6 and Version 7 of Component/Vci Multi Tty

Timestamp:

Jan 4, 2008, 12:37:31 PM (17 years ago)

Author:

Nicolas Pouillon

Comment:

soclib_io

Component/Vci Multi Tty

@@ -24 +24 @@
 Each TTY controller contains 3 memory mapped registers:
 
- * `TTY_WRITE`: ADDRESS![3:0] = 0x0
+ * `TTY_WRITE`
 This 8 bits pseudo-register is write only.
 Any write request will interpret the 8 LSB bits of the WDATA field
 as an ASCII character, and this character will be displayed on the addressed terminal. 
 
- * `TTY_STATUS`: ADDRESS![3:0] = 0x4 
+ * `TTY_STATUS`
 This Boolean status register is read-only. 
 A read request returns the zero value if there is no pending character.
 It returns a non zero value if there is a pending character in the keyboard buffer. 
 
- * `TTY_READ`: ADDRESS![3:0] = 0x8
+ * `TTY_READ`
 This 8 bits register contains one single ASCII character. 
 This register is read-only. A read request returns the ACSII character
@@ -54 +54 @@
 static inline void putc(const size_t term_no, const char x)
 {
-    volatile int *tty = ((int*)tty_address) + term_no*TTY_SPAN;
-    tty[TTY_WRITE] = x;
+    soclib_io_set( tty_address, term_no*TTY_SPAN + TTY_WRITE, x );
 }
 
 static inline char getc(const size_t term_no)
 {
-    volatile int *tty = ((int*)tty_address) + term_no*TTY_SPAN;
-    return tty[TTY_READ];
+    return soclib_io_get( tty_address, term_no*TTY_SPAN + TTY_READ );
 }
 }}}