Add support for LEDs and buttons

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1113 42af7a65-404d-4744-a932-0658087f49c3

configs/olimex-strp711/include/board.h

@@ -123,6 +123,22 @@
 
 /* LED definitions **********************************************************/
 
+/* The Olimex board has only two LEDs, so following states are faked as
+ * follows
+ *
+ *                       SET         CLEAR
+ *  LED_STARTED          (none)      (n/a)
+ *  LED_HEAPALLOCATE     LED1        (n/a)
+ *  LED_IRQSENABLED      LED1        (n/a)
+ *  LED_STACKCREATED     LED1        (n/a)
+ *  LED_INIRQ            LED1+LED2   LED1
+ *  LED_SIGNAL           LED1+LED2   LED1
+ *  LED_ASSERTION        LED1+LED2   LED1
+ *  LED_PANIC            LED1+LED2*  LED1
+ *
+ *                      *The previous state of LED2 will be retained
+ */
+
 #define LED_STARTED          0
 #define LED_HEAPALLOCATE     1
 #define LED_IRQSENABLED      2
@@ -132,8 +148,38 @@
 #define LED_ASSERTION        6
 #define LED_PANIC            7
 
+/* Button definitions *******************************************************/
+
+/* The Olimex board has two buttons, one labled "BUT" and the other "WAKEUP" */
+
+#define BUT_BUTTON              1 /* Bit 0: BUT button is depressed */
+#define WAKEUP_BUTTON           2 /* Bit 1: WAKEUP button is depressed */
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
 /****************************************************************************
- * Inline Functions
+ * Public Functions
  ****************************************************************************/
 
+#ifdef CONFIG_ARCH_BUTTONS
+EXTERN void up_buttoninit(void);
+EXTERN ubyte up_buttons(void);
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+#endif
+
 #endif  /* _CONFIGS_OLIMEX_STRP711_BOARD_H */

configs/olimex-strp711/ostest/defconfig

@@ -48,6 +48,7 @@
 # CONFIG_ARCH_BOARD_name - for use in C code
 # CONFIG_BOARD_LOOPSPERMSEC - for delay loops
 # CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to Olimex STR-P711
+# CONFIG_ARCH_BUTTONS - Support reading buttons. Unique to Olimex STR-P711
 # CONFIG_DRAM_SIZE - Describes the internal DRAM.
 # CONFIG_DRAM_START - The start address of internal DRAM
 # CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
@@ -63,6 +64,7 @@ CONFIG_ARCH_BOARD=olimex-strp711
 CONFIG_ARCH_BOARD_OLIMEX_STRP711=y
 CONFIG_BOARD_LOOPSPERMSEC=3270
 CONFIG_ARCH_LEDS=y
+CONFIG_ARCH_BUTTONS=y
 CONFIG_DRAM_SIZE=0x00010000
 CONFIG_DRAM_START=0x20000000
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)

configs/olimex-strp711/src/Makefile

@@ -40,7 +40,7 @@ CFLAGS		+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(TOPDIR)/sched
 
 ASRCS		= 
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= up_spi.c up_leds.c
+CSRCS		= up_spi.c up_leds.c up_buttons.c
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)

configs/olimex-strp711/src/up_buttons.c

+/****************************************************************************
+ * configs/olimex-strp711/src/up_leds.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+#include "chip.h"
+#include "up_arch.h"
+#include "up_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* The Olimex board has two buttons, one labled "BUT" and the other "WAKEUP"
+ *
+ * P1.14: WAKEUP button
+ * P1.13: BUT button
+ */
+
+#define STR71X_BUTBUTTON_GPIO1    (0x2000)
+#define STR71X_WAKEUPBUTTON_GPIO1 (0x4000)
+#define STR71X_BOTHBUTTONS_GPIO1  (STR71X_BUTBUTTON_GPIO1|STR71X_WAKEUPBUTTON_GPIO1)
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_buttoninit
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_BUTTONS
+void up_buttoninit(void)
+{
+  uint16 reg16;
+
+  /* Configure the GPIO pins as inputs */
+
+  reg16  = getreg16(STR71X_GPIO1_PC0);
+  reg16 |= STR71X_BOTHBUTTONS_GPIO1
+  putreg16(reg16, STR71X_GPIO1_PC0);
+
+  reg16  = getreg16(STR71X_GPIO1_PC1);
+  reg16 &= ~STR71X_BOTHBUTTONS_GPIO1
+  putreg16(reg16, STR71X_GPIO1_PC1);
+
+  reg16  = getreg16(STR71X_GPIO1_PC2);
+  reg16 &= ~STR71X_BOTHBUTTONS_GPIO1
+  putreg16(reg16, STR71X_GPIO1_PC2);
+}
+
+/****************************************************************************
+ * Name: up_buttons
+ ****************************************************************************/
+
+ubyte up_buttons(void)
+{
+  uint16 reg16 = getreg16(STR71X_GPIO1_PD);
+  ubyte ret    = 0;
+
+  if ((reg16 & STR71X_BUTBUTTON_GPIO1) != 0)
+    {
+      ret |= BUT_BUTTON;
+    }
+  if ((reg16 & STR71X_WAKEUPBUTTON_GPIO1) != 0)
+    {
+      ret |= WAKEUP_BUTTON;
+    }
+  return ret;
+}
+#endif /* CONFIG_ARCH_BUTTONS */

configs/olimex-strp711/src/up_leds.c

@@ -48,16 +48,50 @@
  * Definitions
  ****************************************************************************/
 
+/* There are two LEDs are connected to  P1.8 & 9 */
+
+#if defined(CONFIG_ARCH_LEDS) && !defined(CONFIG_STR71X_GPIO1)
+#  error "LEDs require GPIO1"
+#endif
+
+#define STR71X_LED1GPIO1_BIT (0x0100)
+#define STR71X_LED2GPIO1_BIT (0x0200)
+#define STR71X_LEDGPIO1_BITS (STR71X_LED1GPIO1_BIT|STR71X_LED2GPIO1_BIT)
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
 
+static uint16 g_led2set;
+static uint16 g_led2clr;
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
 /****************************************************************************
- * Public Funtions
+ * Name: up_setleds
+ ****************************************************************************/
+
+static void up_setleds(uint16 setbits, uint16 clearbits)
+{
+  uint16 reg16;
+
+  /* Save the state of LED2 for later */
+
+  g_led2set = setbits & STR71X_LED2GPIO1_BIT;
+  g_led2clr = clearbits & STR71X_LED2GPIO1_BIT;
+
+  /* Set and clear bits as directed */
+
+  reg16  = getreg16(STR71X_GPIO1_PD);
+  reg16 &= ~clearbits;
+  reg16 |= setbits;
+  putreg16(reg16, STR71X_GPIO1_PD);
+}
+
+/****************************************************************************
+ * Public Functions
  ****************************************************************************/
 
 /****************************************************************************
@@ -67,7 +101,27 @@
 #ifdef CONFIG_ARCH_LEDS
 void up_ledinit(void)
 {
-#warning "To be provided"
+  uint16 reg16;
+
+  /* Set normal function output */
+
+  reg16  = getreg16(STR71X_GPIO1_PC0);
+  reg16 |= STR71X_LEDGPIO1_BITS
+  putreg16(reg16, STR71X_GPIO1_PC0);
+
+  reg16  = getreg16(STR71X_GPIO1_PC1);
+  reg16 &= ~STR71X_LEDGPIO1_BITS
+  putreg16(reg16, STR71X_GPIO1_PC1);
+
+  reg16  = getreg16(STR71X_GPIO1_PC2);
+  reg16 |= STR71X_LEDGPIO1_BITS
+  putreg16(reg16, STR71X_GPIO1_PC2);
+
+  /* Clear the LEDs (1 clears; 0 sets) */
+
+  reg16  = getreg16(STR71X_GPIO1_PD);
+  reg16 |= STR71X_LEDGPIO1_BITS
+  putreg16(reg16, STR71X_GPIO1_PD);
 }
 
 /****************************************************************************
@@ -76,7 +130,45 @@ void up_ledinit(void)
 
 void up_ledon(int led)
 {
-#warning "To be provided"
+  /* The Olimex board has only two LEDs, so following states are faked as
+   * follows
+   *
+   *                       SET         CLEAR
+   *  LED_STARTED          (none)      (n/a)
+   *  LED_HEAPALLOCATE     LED1        (n/a)
+   *  LED_IRQSENABLED      LED1        (n/a)
+   *  LED_STACKCREATED     LED1        (n/a)
+   *  LED_INIRQ            LED1+LED2   LED1
+   *  LED_SIGNAL           LED1+LED2   LED1
+   *  LED_ASSERTION        LED1+LED2   LED1
+   *  LED_PANIC            LED1+LED2*  LED1
+   *
+   *                      *The previous state of LED2 will be retained
+   */
+
+  switch (led)
+    {
+    default:
+    case LED_STARTED:
+      up_setleds(0, STR71X_LED1GPIO1_BIT|STR71X_LED2GPIO1_BIT); /* Clear LED1&2 */
+      break;
+
+    case LED_HEAPALLOCATE:
+    case LED_IRQSENABLED:
+    case LED_STACKCREATED:
+      up_setleds(STR71X_LED1GPIO1_BIT, STR71X_LED2GPIO1_BIT); /* Set LED1, clear LED2 */
+      break;
+
+    case LED_INIRQ:
+    case LED_SIGNAL:
+    case LED_ASSERTION:
+      up_setleds(STR71X_LED1GPIO1_BIT|STR71X_LED2GPIO1_BIT, 0); /* Set LED1&2 */
+      break;
+
+    case LED_PANIC:
+      up_setleds(STR71X_LED2GPIO1_BIT|g_led2set, g_led2set); /* Set LED1, preserve LED2 */
+      break;
+    }
 }
 
 /****************************************************************************
@@ -85,6 +177,40 @@ void up_ledon(int led)
 
 void up_ledoff(int led)
 {
-#warning "To be provided"
+  /* The Olimex board has only two LEDs, so following states are faked as
+   * follows
+   *
+   *                       SET         CLEAR
+   *  LED_STARTED          (none)      (n/a)
+   *  LED_HEAPALLOCATE     LED1        (n/a)
+   *  LED_IRQSENABLED      LED1        (n/a)
+   *  LED_STACKCREATED     LED1        (n/a)
+   *  LED_INIRQ            LED1+LED2   LED1
+   *  LED_SIGNAL           LED1+LED2   LED1
+   *  LED_ASSERTION        LED1+LED2   LED1
+   *  LED_PANIC            LED1+LED2*  LED1
+   *
+   *                      *The previous state of LED2 will be retained
+   */
+
+  switch (led)
+    {
+    default:
+    case LED_STARTED:
+    case LED_HEAPALLOCATE:
+    case LED_IRQSENABLED:
+    case LED_STACKCREATED:
+      break;
+
+    case LED_INIRQ:
+    case LED_SIGNAL:
+    case LED_ASSERTION:
+      up_setleds(STR71X_LED1GPIO1_BIT, STR71X_LED2GPIO1_BIT); /* Set LED1, clear LED2 */
+      break;
+
+    case LED_PANIC:
+      up_setleds(g_led2set, STR71X_LED1GPIO1_BIT|g_led2clr); /* Clear LED1, preserve LED2 */
+      break;
+    }
 }
 #endif /* CONFIG_ARCH_LEDS */