From 053a064adea9cc264ea3495712bb53192de60ffa Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 4 Nov 2012 16:08:02 +0000
Subject: [PATCH] Relay example from Darcy Gong

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5306 42af7a65-404d-4744-a932-0658087f49c3
---
 configs/shenzhou/include/board.h         | 16 ++++++++++++----
 configs/shenzhou/src/shenzhou-internal.h |  4 +++-
 configs/shenzhou/src/up_relays.c         | 17 ++++++++++++++---
 3 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/configs/shenzhou/include/board.h b/configs/shenzhou/include/board.h
index b0fc1b52d5..efc15c73d4 100644
--- a/configs/shenzhou/include/board.h
+++ b/configs/shenzhou/include/board.h
@@ -49,6 +49,8 @@
 #include "stm32_sdio.h"
 #include "stm32_internal.h"
 
+#include <nuttx/arch.h>
+
 /************************************************************************************
  * Pre-processor Definitions
  ************************************************************************************/
@@ -174,6 +176,10 @@
 #define BUTTON_TAMPER_BIT   BUTTON_KEY3_BIT
 #define BUTTON_WAKEUP_BIT   BUTTON_KEY4_BIT
 
+/* Relays */
+
+#define NUM_RELAYS          2
+
 /* Pin selections ******************************************************************/
 /* Ethernet
  *
@@ -426,18 +432,20 @@ EXTERN void stm32_lcdclear(uint16_t color);
  * Relay control functions
  *
  * Description:
- *   Non-standard fucntions for relay control from the Shenzhou board.
+ *   Non-standard functions for relay control from the Shenzhou board.
+ *
+ *   NOTE:  These must match the prototypes in include/nuttx/arch.h
  *
  ************************************************************************************/
 
 #ifdef CONFIG_ARCH_RELAYS
 EXTERN void up_relaysinit(void);
-EXTERN void relays_setstat(int relays,bool stat);
+EXTERN void relays_setstat(int relays, bool stat);
 EXTERN bool relays_getstat(int relays);
 EXTERN void relays_setstats(uint32_t relays_stat);
 EXTERN uint32_t relays_getstats(void);
-EXTERN void relays_onoff(int relays,uint32_t mdelay);
-EXTERN void relays_onoffs(uint32_t relays_stat,uint32_t mdelay);
+EXTERN void relays_onoff(int relays, uint32_t mdelay);
+EXTERN void relays_onoffs(uint32_t relays_stat, uint32_t mdelay);
 EXTERN void relays_resetmode(int relays);
 EXTERN void relays_powermode(int relays);
 EXTERN void relays_resetmodes(uint32_t relays_stat);
diff --git a/configs/shenzhou/src/shenzhou-internal.h b/configs/shenzhou/src/shenzhou-internal.h
index 862a0250dc..f28abcf602 100644
--- a/configs/shenzhou/src/shenzhou-internal.h
+++ b/configs/shenzhou/src/shenzhou-internal.h
@@ -393,9 +393,11 @@
 
 /* Relays */
 
-#define NUM_RELAYS      1
+#define NUM_RELAYS      2
 #define GPIO_RELAYS_R00 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
                          GPIO_OUTPUT_SET|GPIO_PORTE|GPIO_PIN0)
+#define GPIO_RELAYS_R01 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
+                         GPIO_OUTPUT_SET|GPIO_PORTE|GPIO_PIN1)
 
 /****************************************************************************************************
  * Public Types
diff --git a/configs/shenzhou/src/up_relays.c b/configs/shenzhou/src/up_relays.c
index 075c7d5903..6916ee455f 100644
--- a/configs/shenzhou/src/up_relays.c
+++ b/configs/shenzhou/src/up_relays.c
@@ -42,11 +42,13 @@
 
 #include <stdint.h>
 #include <unistd.h>
-
-#include <arch/board/board.h>
-#include "shenzhou-internal.h"
 #include <debug.h>
 
+#include <nuttx/arch.h>
+#include <arch/board/board.h>
+
+#include "shenzhou-internal.h"
+
 #ifdef CONFIG_ARCH_RELAYS
 
 /****************************************************************************
@@ -62,6 +64,7 @@
  ****************************************************************************/
 
 static uint32_t g_relays_stat = 0;
+static bool g_relays_init = false;
 
 static const uint16_t g_relays[NUM_RELAYS] =
 {
@@ -173,6 +176,11 @@ void up_relaysinit(void)
 {
   int i;
 
+  if (g_relays_init)
+    {
+      return;
+    }
+
   /* Configure the GPIO pins as inputs.  NOTE that EXTI interrupts are
    * configured for some pins but NOT used in this file
    */
@@ -180,7 +188,10 @@ void up_relaysinit(void)
   for (i = 0; i < NUM_RELAYS; i++)
     {
       stm32_configgpio(g_relays[i]);
+      stm32_gpiowrite(g_relays[i], false);
     }
+
+  g_relays_init = true;
 }
 
 void relays_setstat(int relays,bool stat)