Diff: pinsel.h

Revision:

0:7a91348b4a02

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pinsel.h	Sun Jul 03 17:11:55 2011 +0000
@@ -0,0 +1,78 @@
+/* Copyright (C) 2010, 2011 by Ivo van Poorten <ivop@euronet.nl>
+ * This file is licensed under the terms of the GNU Lesser
+ * General Public License, version 3.
+ */
+
+#ifndef FASTLIB_PINSEL_H
+#define FASTLIB_PINSEL_H
+
+#include "fastlib/common.h"
+
+#define FL_PINSEL0      ((volatile uint32_t *) 0x4002c000)
+#define FL_PINMODE0     ((volatile uint32_t *) 0x4002c040)
+#define FL_PINMODE_OD0  ((volatile uint32_t *) 0x4002c068)
+
+#define FL_PULLUP       0
+#define FL_REPEATER     1
+#define FL_TRISTATE     2
+#define FL_FLOATING     2
+#define FL_PULLDOWN     3
+
+#define FL_FUNC_DEFAULT 0
+#define FL_FUNC_ALT1    1
+#define FL_FUNC_ALT2    2
+#define FL_FUNC_ALT3    3
+
+/* fl_pinsel(port,pin,func,resistor,opendrain) :
+ *
+ * port         0-4
+ * pin          0-31
+ * func         0-3     (-1 is ignore)  default/alt1/alt2/alt3
+ * resistor     0-3     (-1 is ignore)  pull-up, repeater, tri-state, pull-down
+ * opendrain    0-1     (-1 is ignore)  off, on
+ */
+
+static inline void fl_pinsel(unsigned port, unsigned pin, const int func, const int resistor, const int opendrain) {
+    if (opendrain >= 0) {
+        *(FL_PINMODE_OD0 + port) &= ~(       1U << pin);
+        *(FL_PINMODE_OD0 + port) |=   opendrain << pin ;
+    }
+
+    if (func == -1 && resistor == -1) return;
+
+    port <<= 1;
+    if (pin >= 16) {
+        pin -= 16;
+        port++;
+    }
+    pin <<= 1;
+
+    if (func >= 0) {    
+        *(FL_PINSEL0 + port) &= ~(  3U << pin);
+        *(FL_PINSEL0 + port) |=   func << pin ;
+    }
+    if (resistor >= 0) {
+        *(FL_PINMODE0 + port) &= ~((uint32_t)      3U << pin);
+        *(FL_PINMODE0 + port) |=   (uint32_t)resistor << pin ;
+    }
+}
+
+/* Perhaps move this to i2c.h later??? */
+
+#define FL_I2CPADCFG ((volatile uint32_t *) 0x4002C07C)
+
+#define FL_SDA0_STANDARD_DRIVE  (0<<0)
+#define FL_SDA0_FAST_DRIVE      (1<<0)
+#define FL_SDA0_GLITCH_ENABLE   (0<<1)
+#define FL_SDA0_GLITCH_DISABLE  (1<<1)
+#define FL_SCL0_STANDARD_DRIVE  (0<<2)
+#define FL_SCL0_FAST_DRIVE      (1<<2)
+#define FL_SCL0_GLITCH_ENABLE   (0<<3)
+#define FL_SCL0_GLITCH_DISABLE  (1<<3)
+
+/* pins P0.27 and P0.28 */
+static inline void fl_i2c_pad_config(const unsigned config) {
+    *FL_I2CPADCFG = config;
+}
+
+#endif
\ No newline at end of file