Diff: gpio.h

Revision:

0:7a91348b4a02

diff -r 000000000000 -r 7a91348b4a02 gpio.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gpio.h	Sun Jul 03 17:11:55 2011 +0000
@@ -0,0 +1,104 @@
+/* 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_GPIO_H
+#define FASTLIB_GPIO_H
+
+#include "fastlib/common.h"
+
+static inline volatile uint32_t *fl_gpio_get_base(const int port) {
+    switch (port) {
+    case 0:  return (volatile uint32_t *) 0x2009c000;
+    case 1:  return (volatile uint32_t *) 0x2009c020;
+    case 2:  return (volatile uint32_t *) 0x2009c040;
+    case 3:  return (volatile uint32_t *) 0x2009c060;
+    case 4:  return (volatile uint32_t *) 0x2009c080;
+    default: return (volatile uint32_t *) 0;
+    }
+}
+
+#define FL_GPIO_OVERALL_INT_STATUS      ((volatile uint32_t *) 0x40028080)
+
+#define FL_GPIO_PORT0_RISE_INT_STATUS   ((volatile uint32_t *) 0x40028084)
+#define FL_GPIO_PORT0_FALL_INT_STATUS   ((volatile uint32_t *) 0x40028088)
+#define FL_GPIO_PORT0_INT_CLEAR         ((volatile uint32_t *) 0x4002808C)
+#define FL_GPIO_PORT0_RISE_INT          ((volatile uint32_t *) 0x40028090)
+#define FL_GPIO_PORT0_FALL_INT          ((volatile uint32_t *) 0x40028094)
+
+#define FL_GPIO_PORT2_RISE_INT_STATUS   ((volatile uint32_t *) 0x400280A4)
+#define FL_GPIO_PORT2_FALL_INT_STATUS   ((volatile uint32_t *) 0x400280A8)
+#define FL_GPIO_PORT2_INT_CLEAR         ((volatile uint32_t *) 0x400280AC)
+#define FL_GPIO_PORT2_RISE_INT          ((volatile uint32_t *) 0x400280B0)
+#define FL_GPIO_PORT2_FALL_INT          ((volatile uint32_t *) 0x400280B4)
+
+/* dir: 0=input, 1=output */
+static inline void fl_gpio_set_direction(const unsigned port, const unsigned int bitmask, const unsigned dir) {
+    if (dir) *(fl_gpio_get_base(port)) |=  bitmask;
+    else     *(fl_gpio_get_base(port)) &= ~bitmask;
+}
+
+static inline void fl_gpio_set_value(const unsigned port, const unsigned bitmask) {
+    *(fl_gpio_get_base(port) + 6) = bitmask;
+}
+
+static inline void fl_gpio_clear_value(const unsigned port, const unsigned bitmask) {
+    *(fl_gpio_get_base(port) + 7) = bitmask;
+}
+
+static inline uint32_t fl_gpio_get_value(const unsigned port, const unsigned bitmask) {
+    return *(fl_gpio_get_base(port) + 5);
+}
+
+static inline void fl_gpio_set_mask(const unsigned port, const unsigned bitmask) {
+    *(fl_gpio_get_base(port) + 4) |= bitmask;
+}
+
+static inline void fl_gpio_clear_mask(const unsigned port, const unsigned bitmask) {
+    *(fl_gpio_get_base(port) + 4) &= ~bitmask;
+}
+
+/* interrupts only on port 0 or 2 */
+
+/* return: 0 = none, !0 = at least one */
+static inline int fl_gpio_port_interrupt_status(const unsigned port) {
+    return *FL_GPIO_OVERALL_INT_STATUS & (1U<<port);
+}
+
+static inline void fl_gpio_interrupt_enable(const unsigned port, const unsigned bitmask, const unsigned edge) {
+    if (port == 0) {
+        if (edge == FL_RISE) *FL_GPIO_PORT0_RISE_INT |= bitmask;
+        else                 *FL_GPIO_PORT0_FALL_INT |= bitmask;
+    } else {
+        if (edge == FL_RISE) *FL_GPIO_PORT2_RISE_INT |= bitmask;
+        else                 *FL_GPIO_PORT2_FALL_INT |= bitmask;
+    }
+}
+
+static inline void fl_gpio_interrupt_disable(const unsigned port, const unsigned bitmask, const unsigned edge) {
+    if (port == 0) {
+        if (edge == FL_RISE) *FL_GPIO_PORT0_RISE_INT &= ~bitmask;
+        else                 *FL_GPIO_PORT0_FALL_INT &= ~bitmask;
+    } else {
+        if (edge == FL_RISE) *FL_GPIO_PORT2_RISE_INT &= ~bitmask;
+        else                 *FL_GPIO_PORT2_FALL_INT &= ~bitmask;
+    }
+}
+
+static inline uint32_t fl_gpio_interrupt_status(const unsigned port, const unsigned bitmask, const unsigned edge) {
+    if (port == 0) {
+        if (edge == FL_RISE) return *FL_GPIO_PORT0_RISE_INT_STATUS & bitmask;
+        else                 return *FL_GPIO_PORT0_FALL_INT_STATUS & bitmask;
+    } else {
+        if (edge == FL_RISE) return *FL_GPIO_PORT2_RISE_INT_STATUS & bitmask;
+        else                 return *FL_GPIO_PORT2_FALL_INT_STATUS & bitmask;
+    }
+}
+
+static inline void fl_gpio_interrupt_clear(const unsigned port, const unsigned bitmask) {
+    if (port == 0) *FL_GPIO_PORT0_INT_CLEAR = bitmask;
+    else           *FL_GPIO_PORT2_INT_CLEAR = bitmask;
+}
+
+#endif
\ No newline at end of file