Several patches from Petteri Aimonen

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5625 42af7a65-404d-4744-a932-0658087f49c3

12 files changed, 130 insertions, 43 deletions

diff --git a/NxWidgets/ChangeLog.txt b/NxWidgets/ChangeLog.txt
index 7ebfc6e8a..43347fcdb 100644
--- a/NxWidgets/ChangeLog.txt
+++ b/NxWidgets/ChangeLog.txt
@@ -270,4 +270,12 @@
 1.6 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>
 
 * Type of argv[] has changed from const char ** to char * const *
+* NXWidgets::CNxWidget:  Add an inline function to get the current style.
+* NxWM::CTaskBar: Make a some methods of CTaskbar virtual to allow
+  customizations.  From Petteri Aimonen.
+* NXWidgets::CCycleButton: Make CCycleButton change state in onPreRelease().
+  This way the new value is already available when a listener gets the
+  action event.  From Petteri Aimonen.
+* NxWidgets/tools/bitmap_converter.py: Fix bitmap_converter.py so that
+  it works with indexed input images.
 
diff --git a/NxWidgets/libnxwidgets/include/ccyclebutton.hxx b/NxWidgets/libnxwidgets/include/ccyclebutton.hxx
index f7f965933..d8a32175e 100644
--- a/NxWidgets/libnxwidgets/include/ccyclebutton.hxx
+++ b/NxWidgets/libnxwidgets/include/ccyclebutton.hxx
@@ -152,7 +152,7 @@ namespace NXWidgets
      * @param y The y coordinate of the mouse.
      */
 
-    virtual void onRelease(nxgl_coord_t x, nxgl_coord_t y);
+    virtual void onPreRelease(nxgl_coord_t x, nxgl_coord_t y);
     
     /**
      * Redraws the button.
diff --git a/NxWidgets/libnxwidgets/include/cnxwidget.hxx b/NxWidgets/libnxwidgets/include/cnxwidget.hxx
index 32e3dfbc6..a6982660b 100644
--- a/NxWidgets/libnxwidgets/include/cnxwidget.hxx
+++ b/NxWidgets/libnxwidgets/include/cnxwidget.hxx
@@ -797,6 +797,13 @@ namespace NXWidgets
     }
 
     /**
+     * Get the style used by this widget
+     * 
+     * @return Const pointer to CWidgetStyle stored inside this widget.
+     */
+    inline const CWidgetStyle *getWidgetStyle() const { return &m_style; }
+    
+    /**
      * Sets this widget's border state.
      *
      * @param isBorderless The border state.
diff --git a/NxWidgets/libnxwidgets/src/ccyclebutton.cxx b/NxWidgets/libnxwidgets/src/ccyclebutton.cxx
index 0fdbba73c..b4dff685b 100644
--- a/NxWidgets/libnxwidgets/src/ccyclebutton.cxx
+++ b/NxWidgets/libnxwidgets/src/ccyclebutton.cxx
@@ -424,7 +424,7 @@ void CCycleButton::drawOutline(CGraphicsPort *port)
  * @param y The y coordinate of the mouse.
  */
 
-void CCycleButton::onRelease(nxgl_coord_t x, nxgl_coord_t y)
+void CCycleButton::onPreRelease(nxgl_coord_t x, nxgl_coord_t y)
 {
   // Choose next option
 
@@ -447,6 +447,8 @@ void CCycleButton::onRelease(nxgl_coord_t x, nxgl_coord_t y)
     }
 
   redraw();
+  
+  CButton::onPreRelease(x, y);
 }
 
 /**
diff --git a/NxWidgets/nxwm/include/ctaskbar.hxx b/NxWidgets/nxwm/include/ctaskbar.hxx
index 5aab9e6bf..229e78b22 100644
--- a/NxWidgets/nxwm/include/ctaskbar.hxx
+++ b/NxWidgets/nxwm/include/ctaskbar.hxx
@@ -83,9 +83,9 @@ namespace NxWM
    */
 
   class CTaskbar : public  NXWidgets::CNxServer,
-                   private NXWidgets::CWidgetEventHandler
+                   protected NXWidgets::CWidgetEventHandler
   {
-  private:
+  protected:
     /**
      * This structure represents an application and its associated icon image
      */
@@ -152,7 +152,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool createTaskbarWindow(void);
+    virtual bool createTaskbarWindow(void);
 
     /**
      * Create the background window. 
@@ -160,7 +160,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool createBackgroundWindow(void);
+    virtual bool createBackgroundWindow(void);
 
     /**
      * Create the background image. 
@@ -168,7 +168,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool createBackgroundImage(void);
+    virtual bool createBackgroundImage(void);
 
     /**
      * (Re-)draw the task bar window.
@@ -176,7 +176,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool redrawTaskbarWindow(void);
+    virtual bool redrawTaskbarWindow(void);
 
     /**
      * Redraw the window at the top of the heirarchy.
@@ -184,7 +184,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool redrawTopApplication(void);
+    virtual bool redrawTopApplication(void);
 
     /**
      * Raise the top window to the top of the NXheirarchy.
@@ -200,7 +200,7 @@ namespace NxWM
      * @return true on success
      */
 
-    bool redrawBackgroundWindow(void);
+    virtual bool redrawBackgroundWindow(void);
 
     /**
      * Redraw the last application in the list of application maintained by
diff --git a/NxWidgets/tools/bitmap_converter.py b/NxWidgets/tools/bitmap_converter.py
index 2cb7e8869..1c5337741 100755
--- a/NxWidgets/tools/bitmap_converter.py
+++ b/NxWidgets/tools/bitmap_converter.py
@@ -121,7 +121,7 @@ if __name__ == '__main__':
     print "Usage: bitmap_converter.py source.png output.cxx"
     sys.exit(1)
   
-  img = Image.open(sys.argv[1])
+  img = Image.open(sys.argv[1]).convert("RGB")
   outfile = open(sys.argv[2], 'w')
   palette = get_palette(img)
   
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 5b8730f3c..c1766a609 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -4161,4 +4161,17 @@
 	* arch/arm/src/lpc17xx: Add support for the Cortex-M4 FPU and
 	  Mikes "common vector" logic.  The LPC1788 is going to need
 	  these things.
-
+	* arch/arm/src/stm32/stm32_spi.c:  Fix SPI DMA logic that does
+	  not work if sem_wait() is interrupt by a signal.  From Petteri
+	  Aimonen.
+	* drivers/input/max11802.c: MAX11802: Fix a timing bug that
+	  corrupted coordinates.  From Petteri Aimonen.
+	* drivers/mmcsd/mmcsd_spi.c:  Use SPI locking so that MMC/SD can
+	  exist on the same bus as other SPI devices.  From Petteri
+	  Aimonen.
+	* graphics/nxfonts/nxfonts_sans17x22.h: Small mod to hyphen in
+	  sans17x22 font.  The hyphen did not have any space on its sides.
+	  This caused it to run together with other characters so that for
+	  example "+-" would look weird. From Petteri Aimonen.
+	* mm/mm_mallinfo.c:  Take MM semaphore in mm_mallinfo. From Petteri
+	  Aimonen.
diff --git a/nuttx/arch/arm/src/stm32/stm32_spi.c b/nuttx/arch/arm/src/stm32/stm32_spi.c
index b4a4f36ab..7119247f7 100644
--- a/nuttx/arch/arm/src/stm32/stm32_spi.c
+++ b/nuttx/arch/arm/src/stm32/stm32_spi.c
@@ -511,7 +511,7 @@ static void spi_dmarxwait(FAR struct stm32_spidev_s *priv)
    * must not really have completed???
    */
 
-  while (sem_wait(&priv->rxsem) != 0 && priv->rxresult == 0)
+  while (sem_wait(&priv->rxsem) != 0 || priv->rxresult == 0)
     {
       /* The only case that an error should occur here is if the wait was awakened
        * by a signal.
@@ -537,7 +537,7 @@ static void spi_dmatxwait(FAR struct stm32_spidev_s *priv)
    * must not really have completed???
    */
 
-  while (sem_wait(&priv->txsem) != 0 && priv->txresult == 0)
+  while (sem_wait(&priv->txsem) != 0 || priv->txresult == 0)
     {
       /* The only case that an error should occur here is if the wait was awakened
        * by a signal.
@@ -731,6 +731,7 @@ static void spi_dmatxsetup(FAR struct stm32_spidev_s *priv, FAR const void *txbu
 #ifdef CONFIG_STM32_SPI_DMA
 static inline void spi_dmarxstart(FAR struct stm32_spidev_s *priv)
 {
+  priv->rxresult = 0;
   stm32_dmastart(priv->rxdma, spi_dmarxcallback, priv, false);
 }
 #endif
@@ -746,6 +747,7 @@ static inline void spi_dmarxstart(FAR struct stm32_spidev_s *priv)
 #ifdef CONFIG_STM32_SPI_DMA
 static inline void spi_dmatxstart(FAR struct stm32_spidev_s *priv)
 {
+  priv->txresult = 0;
   stm32_dmastart(priv->txdma, spi_dmatxcallback, priv, false);
 }
 #endif
diff --git a/nuttx/drivers/input/max11802.c b/nuttx/drivers/input/max11802.c
index ea3883cd0..9cb8dee0e 100644
--- a/nuttx/drivers/input/max11802.c
+++ b/nuttx/drivers/input/max11802.c
@@ -188,11 +188,9 @@ static void max11802_lock(FAR struct spi_dev_s *spi)
    * unlocked)
    */
 
-  SPI_SELECT(spi, SPIDEV_TOUCHSCREEN, true);
   SPI_SETMODE(spi, CONFIG_MAX11802_SPIMODE);
   SPI_SETBITS(spi, 8);
   SPI_SETFREQUENCY(spi, CONFIG_MAX11802_FREQUENCY);
-  SPI_SELECT(spi, SPIDEV_TOUCHSCREEN, false);
 }
 #endif
 
@@ -249,11 +247,9 @@ static inline void max11802_configspi(FAR struct spi_dev_s *spi)
    * bother because it might change.
    */
 
-  SPI_SELECT(spi, SPIDEV_TOUCHSCREEN, true);
   SPI_SETMODE(spi, CONFIG_MAX11802_SPIMODE);
   SPI_SETBITS(spi, 8);
   SPI_SETFREQUENCY(spi, CONFIG_MAX11802_FREQUENCY);
-  SPI_SELECT(spi, SPIDEV_TOUCHSCREEN, false);
 }
 #endif
 
@@ -629,10 +625,20 @@ static void max11802_worker(FAR void *arg)
     }
   else
     {
-      /* Wait for data ready */
-      do {
-        /* Handle pen down events.  First, sample positional values. */
+      /* Wait for data ready
+       * Note: MAX11802 signals the readiness of the results using
+       * the lowest 4 bits of the result. However these are the
+       * last bits to be read out of the device. It appears that
+       * the hardware value can change in the middle of the readout,
+       * causing the upper bits to be still invalid even though lower
+       * bits indicate valid result.
+       * 
+       * We work around this by reading the registers once more after
+       * the tags indicate they are ready.
+       */
       
+      int readycount = 0;
+      do {
 #ifdef CONFIG_MAX11802_SWAPXY
         x = max11802_sendcmd(priv, MAX11802_CMD_YPOSITION, &tags);
         y = max11802_sendcmd(priv, MAX11802_CMD_XPOSITION, &tags2);
@@ -640,8 +646,12 @@ static void max11802_worker(FAR void *arg)
         x = max11802_sendcmd(priv, MAX11802_CMD_XPOSITION, &tags);
         y = max11802_sendcmd(priv, MAX11802_CMD_YPOSITION, &tags2);
 #endif
-      } while (tags == 0xF || tags2 == 0xF);
-
+        if (tags != 0xF && tags2 != 0xF)
+        {
+          readycount++;
+        }
+      } while (readycount < 2);
+      
       /* Continue to sample the position while the pen is down */
       wd_start(priv->wdog, MAX11802_WDOG_DELAY, max11802_wdog, 1, (uint32_t)priv);
       
diff --git a/nuttx/drivers/mmcsd/mmcsd_spi.c b/nuttx/drivers/mmcsd/mmcsd_spi.c
index 3d4cf1dd1..9939fa9de 100644
--- a/nuttx/drivers/mmcsd/mmcsd_spi.c
+++ b/nuttx/drivers/mmcsd/mmcsd_spi.c
@@ -169,7 +169,8 @@ struct mmcsd_cmdinfo_s
 
 /* Misc *********************************************************************/
 
-static void   mmcsd_semtake(sem_t *sem);
+static void   mmcsd_semtake(sem_t *sem, FAR struct spi_dev_s *spi);
+static void   mmcsd_semgive(sem_t *sem, FAR struct spi_dev_s *spi);
 
 /* Card SPI interface *******************************************************/
 
@@ -339,8 +340,18 @@ static const struct mmcsd_cmdinfo_s g_acmd41 = {ACMD41, MMCSD_CMDRESP_R1, 0xff};
  * Name: mmcsd_semtake
  ****************************************************************************/
 
-static void mmcsd_semtake(sem_t *sem)
+static void mmcsd_semtake(sem_t *sem, FAR struct spi_dev_s *spi)
 {
+  /* Get exclusive access to the SPI bus (if necessary) */
+
+#ifndef CONFIG_SPI_OWNBUS
+  (void)SPI_LOCK(spi, true);
+#endif
+
+  /* Get exclusive access to the MMC/SD device (prossibly un-necessary if
+   * SPI_LOCK is also implemented as a semaphore.
+   */
+   
   while (sem_wait(sem) != 0)
     {
       /* The only case that an error should occur here is if the wait was
@@ -351,8 +362,19 @@ static void mmcsd_semtake(sem_t *sem)
     }
 }
 
-#define mmcsd_semgive(sem) sem_post(sem)
+static void mmcsd_semgive(sem_t *sem, FAR struct spi_dev_s *spi)
+{
+  /* Relinquish the lock on the MMC/SD device */
+
+  sem_post(sem);
 
+  /* Relinquish the lock on the SPI bus */
+  
+#ifndef CONFIG_SPI_OWNBUS
+  (void)SPI_LOCK(spi, false);
+#endif
+}
+  
 /****************************************************************************
  * Name: mmcsd_waitready
  *
@@ -1005,7 +1027,7 @@ static int mmcsd_open(FAR struct inode *inode)
   /* Verify that an MMC/SD card has been inserted */
 
   ret = -ENODEV;
-  mmcsd_semtake(&slot->sem);
+  mmcsd_semtake(&slot->sem, spi);
   if ((SPI_STATUS(spi, SPIDEV_MMCSD) & SPI_STATUS_PRESENT) != 0)
     {
       /* Yes.. a card is present.  Has it been initialized? */
@@ -1030,7 +1052,7 @@ static int mmcsd_open(FAR struct inode *inode)
     }
 
 errout_with_sem:
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
   return ret;
 }
 
@@ -1124,7 +1146,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
 
   /* Select the slave */
 
-  mmcsd_semtake(&slot->sem);
+  mmcsd_semtake(&slot->sem, spi);
   SPI_SELECT(spi, SPIDEV_MMCSD, true);
 
   /* Single or multiple block read? */
@@ -1172,6 +1194,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
               fdbg("Failed: to receive the block\n");
               goto errout_with_eio;
             }
+
          buffer += SECTORSIZE(slot);
        }
 
@@ -1184,7 +1207,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
 
   SPI_SELECT(spi, SPIDEV_MMCSD, false);
   SPI_SEND(spi, 0xff);
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
 
   fvdbg("Read %d bytes:\n", nbytes);
   mmcsd_dumpbuffer("Read buffer", buffer, nbytes);
@@ -1192,7 +1215,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
 
 errout_with_eio:
   SPI_SELECT(spi, SPIDEV_MMCSD, false);
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
   return -EIO;
 }
 
@@ -1281,11 +1304,12 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
       offset = start_sector * SECTORSIZE(slot);
       fvdbg("nbytes=%d byte offset=%d\n", nbytes, offset);
     }
+
   mmcsd_dumpbuffer("Write buffer", buffer, nbytes);
 
   /* Select the slave */
 
-  mmcsd_semtake(&slot->sem);
+  mmcsd_semtake(&slot->sem, spi);
   SPI_SELECT(spi, SPIDEV_MMCSD, true);
 
   /* Single or multiple block transfer? */
@@ -1356,7 +1380,7 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
   ret = mmcsd_waitready(slot);
   SPI_SELECT(spi, SPIDEV_MMCSD, false);
   SPI_SEND(spi, 0xff);
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
 
   /* The success return value is the number of sectors written */
 
@@ -1364,7 +1388,7 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
 
 errout_with_sem:
   SPI_SELECT(spi, SPIDEV_MMCSD, false);
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
   return -EIO;
 }
 #endif
@@ -1413,14 +1437,14 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
 
   /* Re-sample the CSD */
 
-  mmcsd_semtake(&slot->sem);
+  mmcsd_semtake(&slot->sem, spi);
   SPI_SELECT(spi, SPIDEV_MMCSD, true);
   ret = mmcsd_getcsd(slot, csd);
   SPI_SELECT(spi, SPIDEV_MMCSD, false);
 
   if (ret < 0)
     {
-      mmcsd_semgive(&slot->sem);
+      mmcsd_semgive(&slot->sem, spi);
       fdbg("mmcsd_getcsd returned %d\n", ret);
       return ret;
     }
@@ -1449,7 +1473,7 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
    */
 
   slot->state &= ~MMCSD_SLOTSTATUS_MEDIACHGD;
-  mmcsd_semgive(&slot->sem);
+  mmcsd_semgive(&slot->sem, spi);
 
   fvdbg("geo_available:     %d\n", geometry->geo_available);
   fvdbg("geo_mediachanged:  %d\n", geometry->geo_mediachanged);
@@ -1470,6 +1494,8 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
  * Description:
  *   Detect media and initialize
  *
+ * Precondition:
+ *   Semaphore has been taken.
  ****************************************************************************/
 
 static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
@@ -1479,7 +1505,8 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
   uint32_t result = MMCSD_SPIR1_IDLESTATE;
   uint32_t start;
   uint32_t elapsed;
-  int i, j;
+  int i;
+  int j;
 
   /* Assume that the card is not ready (we'll clear this on successful card
    * initialization.
@@ -1551,6 +1578,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
     {
       fdbg("Send CMD0 failed: R1=%02x\n", result);
       SPI_SELECT(spi, SPIDEV_MMCSD, false);
+      mmcsd_semgive(&slot->sem, spi);
       return -EIO;
     }
 
@@ -1585,6 +1613,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
                       break;
                     }
                 }
+
               elapsed = ELAPSED_TIME(start);
             }
           while (elapsed < MMCSD_DELAY_1SEC);
@@ -1594,6 +1623,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
           if (elapsed < MMCSD_DELAY_1SEC)
            {
              fvdbg("Send CMD58\n");
+
              SPI_SEND(spi, 0xff);
              result = mmcsd_sendcmd(slot, &g_cmd58, 0);
              if (result == MMCSD_SPIR1_OK)
@@ -1664,6 +1694,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
                    break;
                 }
              }
+
           elapsed = ELAPSED_TIME(start);
         }
       while (elapsed < MMCSD_DELAY_1SEC);
@@ -1672,6 +1703,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
         {
           fdbg("Failed to exit IDLE state\n");
           SPI_SELECT(spi, SPIDEV_MMCSD, false);
+          mmcsd_semgive(&slot->sem, spi);
           return -EIO;
         }
     }
@@ -1680,6 +1712,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
     {
       fdbg("Failed to identify card\n");
       SPI_SELECT(spi, SPIDEV_MMCSD, false);
+      mmcsd_semgive(&slot->sem, spi);
       return -EIO;
     }
 
@@ -1691,8 +1724,10 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
     {
       fdbg("mmcsd_getcsd(CMD9) failed: %d\n", result);
       SPI_SELECT(spi, SPIDEV_MMCSD, false);
+      mmcsd_semgive(&slot->sem, spi);
       return -EIO;
     }
+
   mmcsd_dmpcsd(csd, slot->type);
 
   /* CSD data and set block size */
@@ -1762,7 +1797,7 @@ static void mmcsd_mediachanged(void *arg)
 
   /* Save the current slot state and reassess the new state */
 
-  mmcsd_semtake(&slot->sem);
+  mmcsd_semtake(&slot->sem, spi);
   oldstate = slot->state;
 
   /* Check if media was removed or inserted */
@@ -1798,6 +1833,8 @@ static void mmcsd_mediachanged(void *arg)
           slot->state |= MMCSD_SLOTSTATUS_MEDIACHGD;
         }
     }
+  
+  mmcsd_semgive(&slot->sem, spi);
 }
 
 /****************************************************************************
@@ -1855,7 +1892,9 @@ int mmcsd_spislotinitialize(int minor, int slotno, FAR struct spi_dev_s *spi)
 
   /* Ininitialize for the media in the slot (if any) */
 
+  mmcsd_semtake(&slot->sem, spi);
   ret = mmcsd_mediainitialize(slot);
+  mmcsd_semgive(&slot->sem, spi);
   if (ret == 0)
     {
       fvdbg("mmcsd_mediainitialize returned OK\n");
diff --git a/nuttx/graphics/nxfonts/nxfonts_sans17x22.h b/nuttx/graphics/nxfonts/nxfonts_sans17x22.h
index cea027447..12eeb8fc9 100644
--- a/nuttx/graphics/nxfonts/nxfonts_sans17x22.h
+++ b/nuttx/graphics/nxfonts/nxfonts_sans17x22.h
@@ -114,8 +114,8 @@
 #define NXFONT_BITMAP_44 {0x40, 0x40, 0x40, 0x80}
 
 /* hyphen (45) */
-#define NXFONT_METRICS_45 {1, 3, 1, 0, 12, 0}
-#define NXFONT_BITMAP_45 {0xe0}
+#define NXFONT_METRICS_45 {1, 5, 1, 0, 12, 0}
+#define NXFONT_BITMAP_45 {0x70}
 
 /* period (46) */
 #define NXFONT_METRICS_46 {1, 1, 2, 1, 15, 0}
diff --git a/nuttx/mm/mm_mallinfo.c b/nuttx/mm/mm_mallinfo.c
index b725535d1..30c1028fd 100644
--- a/nuttx/mm/mm_mallinfo.c
+++ b/nuttx/mm/mm_mallinfo.c
@@ -98,13 +98,17 @@ int mallinfo(struct mallinfo *info)
   for (region = 0; region < g_nregions; region++)
 #endif
     {
-      /* Visit each node in the region */
+      /* Visit each node in the region
+       * Retake the semaphore for each region to reduce latencies
+       */
+      
+      mm_takesemaphore();
 
       for (node = g_heapstart[region];
            node < g_heapend[region];
            node = (struct mm_allocnode_s *)((char*)node + node->size))
         {
-          mvdbg("region=%d node=%p preceding=%p\n", region, node, node->preceding);
+          mvdbg("region=%d node=%p size=%p preceding=%p\n", region, node, node->size, node->preceding);
           if (node->preceding & MM_ALLOC_BIT)
             {
               uordblks += node->size;
@@ -120,6 +124,8 @@ int mallinfo(struct mallinfo *info)
             }
         }
 
+      mm_givesemaphore();
+        
       mvdbg("region=%d node=%p g_heapend=%p\n", region, node, g_heapend[region]);
       DEBUGASSERT(node == g_heapend[region]);
       uordblks += SIZEOF_MM_ALLOCNODE; /* account for the tail node */