diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 252edd737b..66f56401da 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -3263,4 +3263,8 @@
 	* Kconfig: Refactor serial settings (moved from chip to drivers/serial).
 	  AVR "teensy" now builds with Kconfig (contributed by Richard Cochran).
 	* Kconfig: Add configuration settings for the LPC17xx
-	* Kconfig: Add configuratino settings for the LM3S (from Richard Cochran).
+	* Kconfig: Add configuration settings for the LM3S (from Richard Cochran).
+	* Kconfig: Verify configuration settings for the STM32.  This include
+	  changes in the way that the external SRAM is configured:  Define
+	  CONFIG_HEAP2_SIZE (decimal) instead of CONFIG_HEAP2_END (hex).
+
diff --git a/nuttx/arch/Kconfig b/nuttx/arch/Kconfig
index fea56b7392..90bc4da918 100644
--- a/nuttx/arch/Kconfig
+++ b/nuttx/arch/Kconfig
@@ -58,11 +58,13 @@ config ARCH_X86
 
 config ARCH_Z16
 	bool "ZNEO"
+	select ARCH_HAVE_HEAP2
 	---help---
 		ZiLOG ZNEO 16-bit architectures (z16f).
 
 config ARCH_Z80
 	bool "z80"
+	select ARCH_HAVE_HEAP2
 	---help---
 		ZiLOG 8-bit architectures (z80, ez80, z8).
 
diff --git a/nuttx/arch/arm/Kconfig b/nuttx/arch/arm/Kconfig
index e6b195aff6..2b06f354c5 100644
--- a/nuttx/arch/arm/Kconfig
+++ b/nuttx/arch/arm/Kconfig
@@ -17,6 +17,7 @@ config ARCH_CHIP_C5471
 config ARCH_CHIP_CALYPSO
 	bool "Calypso"
 	select ARCH_ARM7TDMI
+	select ARCH_HAVE_HEAP2
 	---help---
 		TI Calypso-based cell phones (ARM7TDMI)
 
@@ -29,6 +30,7 @@ config ARCH_CHIP_DM320
 config ARCH_CHIP_IMX
 	bool "Freescale iMX"
 	select ARCH_ARM920T
+	select ARCH_HAVE_HEAP2
 	---help---
 		Freescale iMX architectures (ARM920T)
 
diff --git a/nuttx/arch/arm/src/calypso/calypso_heap.c b/nuttx/arch/arm/src/calypso/calypso_heap.c
index b51596f90a..095fd1a5ad 100644
--- a/nuttx/arch/arm/src/calypso/calypso_heap.c
+++ b/nuttx/arch/arm/src/calypso/calypso_heap.c
@@ -37,6 +37,10 @@
  *
  ****************************************************************************/
 
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
 #include <nuttx/config.h>
 #include <nuttx/mm.h>
 
@@ -52,6 +56,14 @@
 #include "up_arch.h"
 #include "up_internal.h"
 
+/****************************************************************************
+ * Preprocessor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
 /****************************************************************************
  * Name: up_addregion
  *
@@ -84,7 +96,7 @@ void up_addregion(void)
   /* Configure the RHEA bridge with some sane default values */
   calypso_rhea_cfg(0, 0, 0xff, 0, 1, 0, 0);
 
-  mm_addregion((FAR void*)CONFIG_HEAP2_START, CONFIG_HEAP2_END-CONFIG_HEAP2_START);
+  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
 
 }
 #endif
diff --git a/nuttx/arch/arm/src/imx/imx_allocateheap.c b/nuttx/arch/arm/src/imx/imx_allocateheap.c
index 1574cac007..a42b2fb85e 100644
--- a/nuttx/arch/arm/src/imx/imx_allocateheap.c
+++ b/nuttx/arch/arm/src/imx/imx_allocateheap.c
@@ -111,8 +111,8 @@ void up_addregion(void)
 
   /* Check for any additional memory regions */
 
-#if defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_END)
-  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
+#if defined(CONFIG_HEAP2_BASE) && defined(CONFIG_HEAP2_SIZE)
+  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
 #endif
 }
 #endif
diff --git a/nuttx/arch/arm/src/stm32/Kconfig b/nuttx/arch/arm/src/stm32/Kconfig
index 442f7c659f..db785fd621 100644
--- a/nuttx/arch/arm/src/stm32/Kconfig
+++ b/nuttx/arch/arm/src/stm32/Kconfig
@@ -84,7 +84,42 @@ config STM32_STM32F20XX
 
 config STM32_STM32F40XX
 	bool
-	default y if ARCH_CHIP_STM32F405RG || ARCH_CHIP_STM32F405VG || ARCH_CHIP_STM32F405ZG || ARCH_CHIP_STM32F407VE || ARCH_CHIP_STM32F407VG || ARCH_CHIP_STM32F407ZE || ARCH_CHIP_STM32F407ZG || ARCH_CHIP_STM32F407IE || ARCH_CHIP_STM32F407IE
+	default y if ARCH_CHIP_STM32F405RG || ARCH_CHIP_STM32F405VG || ARCH_CHIP_STM32F405ZG || ARCH_CHIP_STM32F407VE || ARCH_CHIP_STM32F407VG || ARCH_CHIP_STM32F407ZE || ARCH_CHIP_STM32F407ZG || ARCH_CHIP_STM32F407IE || ARCH_CHIP_STM32F407IG
+
+choice
+	prompt "Toolchain Selection"
+	default STM32_CODESOURCERYW
+	depends on ARCH_CHIP_STM32
+
+config STM32_CODESOURCERYW
+	bool "CodeSourcery for Windows"
+
+config STM32_CODESOURCERYL
+	bool "CodeSourcery for Linux"
+
+config STM32_ATOLLIC_LITE
+	bool "Atollic Lite for Windows"
+
+config STM32_ATOLLIC_PRO
+	bool "Atollic Pro for Windows"
+
+config STM32_DEVKITARM
+	bool "DevkitARM (Windows)"
+
+config STM32_RAISONANCE
+	bool "STMicro Raisonance for Windows"
+
+config STM32_BUILDROOT
+	bool "NuttX buildroot (Cygwin or Linux)"
+
+endchoice
+
+config STM32_DFU
+	bool "DFU bootloader"
+	default n
+	---help---
+		Configure and position code for use with the STMicro DFU bootloader.  Do
+		not select this option if you will load code using JTAG/SWM.
 
 menu "STM32 Peripheral Support"
 
@@ -228,7 +263,7 @@ config STM32_SPI4
 
 config STM32_SYSCFG
 	bool "SYSCFG"
-	default n
+	default y
 	depends on STM32_STM32F20XX || STM32_STM32F40XX
 
 config STM32_TIM1
@@ -517,24 +552,11 @@ config STM32_CCMEXCLUDE
 config STM32_FSMC_SRAM
 	bool "External SRAM on FSMC"
 	default n
-	depends on FSMC
+	depends on STM32_FSMC
+	select ARCH_HAVE_HEAP2
 	---help---
 		In addition to internal SRAM, SRAM may also be available through the FSMC.
 
-config HEAP2_BASE
-	hex "FSMC SRAM base address"
-	default 0x00000000
-	depends on STM32_FSMC_SRAM
-	---help---
-		The base address of the SRAM in the FSMC address space.
-
-config HEAP2_END
-	hex "FSMC SRAM end+1 address"
-	default 0x00000000
-	depends on STM32_FSMC_SRAM
-	---help---
-		The end (+1) of the SRAM in the FSMC address space
-
 config STM32_TIM1_PWM
 	bool "TIM1 PWM"
 	default n
@@ -1536,6 +1558,7 @@ config STM32_PHYADDR
 config STM32_MII
 	bool "Use MII interface"
 	default n
+	depends on STM32_ETHMAC
 	---help---
 		Support Ethernet MII interface.
 
@@ -1549,13 +1572,14 @@ config STM32_MII_MCO2
 config STM32_AUTONEG
 	bool "Use autonegtiation"
 	default y
+	depends on STM32_ETHMAC
 	---help---
 		Use PHY autonegotion to determine speed and mode
 
 config STM32_ETHFD
 	bool "Full duplex"
 	default n
-	depends on !STM32_AUTONEG
+	depends on STM32_ETHMAC && !STM32_AUTONEG
 	---help---
 		If STM32_AUTONEG is not defined, then this may be defined to select full duplex
 		mode. Default: half-duplex
@@ -1563,7 +1587,7 @@ config STM32_ETHFD
 config STM32_ETH100MBPS
 	bool "100 Mbps"
 	default n
-	depends on !STM32_AUTONEG
+	depends on STM32_ETHMAC && !STM32_AUTONEG
 	---help---
 		If STM32_AUTONEG is not defined, then this may be defined to select 100 MBps
 		speed.  Default: 10 Mbps
@@ -1607,6 +1631,7 @@ config STM32_PHYSR_FULLDUPLEX
 config STM32_ETH_PTP
 	bool "Precision Time Protocol (PTP)"
 	default n
+	depends on STM32_ETHMAC
 	---help---
 		Precision Time Protocol (PTP).  Not supported but some hooks are indicated
 		with this condition.
@@ -1616,6 +1641,7 @@ endmenu
 config STM32_RMII
 	bool
 	default y if !STM32_MII
+	depends on STM32_ETHMAC
 
 config STM32_MII_MCO1
 	bool
diff --git a/nuttx/arch/arm/src/stm32/stm32_allocateheap.c b/nuttx/arch/arm/src/stm32/stm32_allocateheap.c
index 4c186a852b..8aa5622c8f 100644
--- a/nuttx/arch/arm/src/stm32/stm32_allocateheap.c
+++ b/nuttx/arch/arm/src/stm32/stm32_allocateheap.c
@@ -73,13 +73,14 @@
  *
  * CONFIG_STM32_FSMC=y        : Enables the FSMC
  * CONFIG_STM32_FSMC_SRAM=y   : Indicates that SRAM is available via the
- *   FSMC (as opposed to an LCD or FLASH).
+ *                              FSMC (as opposed to an LCD or FLASH).
  * CONFIG_HEAP2_BASE          : The base address of the SRAM in the FSMC
- *   address space
- * CONFIG_HEAP2_END           : The end (+1) of the SRAM in the FSMC
- *   address space
+ *                              address space
+ * CONFIG_HEAP2_SIZE          : The size of the SRAM in the FSMC
+ *                              address space
  * CONFIG_MM_REGIONS          : Must be set to a large enough value to
- *   include the FSMC SRAM (as determined by the rules provided below)
+ *                              include the FSMC SRAM (as determined by
+ *                              the rules provided below)
  */
 
 #ifndef CONFIG_STM32_FSMC
@@ -256,12 +257,12 @@
 
 /* If FSMC SRAM is going to be used as heap, then verify that the starting
  * address and size of the external SRAM region has been provided in the
- * configuration (as CONFIG_HEAP2_BASE and CONFIG_HEAP2_END).
+ * configuration (as CONFIG_HEAP2_BASE and CONFIG_HEAP2_SIZE).
  */
 
 #ifdef CONFIG_STM32_FSMC_SRAM
-#  if !defined(CONFIG_HEAP2_BASE) || !defined(CONFIG_HEAP2_END)
-#    error "CONFIG_HEAP2_BASE and CONFIG_HEAP2_END must be provided"
+#  if !defined(CONFIG_HEAP2_BASE) || !defined(CONFIG_HEAP2_SIZE)
+#    error "CONFIG_HEAP2_BASE and CONFIG_HEAP2_SIZE must be provided"
 #    undef CONFIG_STM32_FSMC_SRAM
 #  endif
 #endif
@@ -317,7 +318,7 @@ void up_addregion(void)
    /* Add the external FSMC SRAM heap region. */
 
 #ifdef CONFIG_STM32_FSMC_SRAM
-   mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
+   mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
 #endif
 }
 #endif
diff --git a/nuttx/arch/z16/src/common/up_allocateheap.c b/nuttx/arch/z16/src/common/up_allocateheap.c
index 62d96e0b34..0b6c766d36 100644
--- a/nuttx/arch/z16/src/common/up_allocateheap.c
+++ b/nuttx/arch/z16/src/common/up_allocateheap.c
@@ -107,6 +107,6 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
 #if CONFIG_MM_REGIONS > 1
 void up_addregion(void)
 {
-  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
+  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
 }
 #endif
diff --git a/nuttx/arch/z80/src/common/up_allocateheap.c b/nuttx/arch/z80/src/common/up_allocateheap.c
index cb2f555938..368785cf2c 100644
--- a/nuttx/arch/z80/src/common/up_allocateheap.c
+++ b/nuttx/arch/z80/src/common/up_allocateheap.c
@@ -109,6 +109,6 @@ void up_allocate_heap(FAR void **heap_start, size_t *heap_size)
 #if CONFIG_MM_REGIONS > 1
 void up_addregion(void)
 {
-  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_END - CONFIG_HEAP2_BASE);
+  mm_addregion((FAR void*)CONFIG_HEAP2_BASE, CONFIG_HEAP2_SIZE);
 }
 #endif
diff --git a/nuttx/configs/compal_e99/nsh_compalram/defconfig b/nuttx/configs/compal_e99/nsh_compalram/defconfig
index a52e2aaf06..a60fbf9479 100644
--- a/nuttx/configs/compal_e99/nsh_compalram/defconfig
+++ b/nuttx/configs/compal_e99/nsh_compalram/defconfig
@@ -45,8 +45,8 @@ CONFIG_ARCH_BOARD_COMPALE99=y
 CONFIG_BOARD_LOOPSPERMSEC=1250
 CONFIG_ROM_VECTORS=n
 CONFIG_MM_REGIONS=2
-CONFIG_HEAP2_START=0x01000000
-CONFIG_HEAP2_END=0x01200000
+CONFIG_HEAP2_BASE=0x01000000
+CONFIG_HEAP2_SIZE=2097152
 CONFIG_ARCH_LEDS=n
 CONFIG_ARCH_INTERRUPTSTACK=1024
 CONFIG_ARCH_STACKDUMP=y
diff --git a/nuttx/configs/compal_e99/nsh_highram/defconfig b/nuttx/configs/compal_e99/nsh_highram/defconfig
index e5f997ebf7..4ed6e486bc 100644
--- a/nuttx/configs/compal_e99/nsh_highram/defconfig
+++ b/nuttx/configs/compal_e99/nsh_highram/defconfig
@@ -45,8 +45,8 @@ CONFIG_ARCH_BOARD_COMPALE99=y
 CONFIG_BOARD_LOOPSPERMSEC=1250
 CONFIG_ROM_VECTORS=n
 CONFIG_MM_REGIONS=2
-CONFIG_HEAP2_START=0x01000000
-CONFIG_HEAP2_END=0x01200000
+CONFIG_HEAP2_BASE=0x01000000
+CONFIG_HEAP2_SIZE=2097152
 CONFIG_ARCH_LEDS=n
 CONFIG_ARCH_INTERRUPTSTACK=1024
 CONFIG_ARCH_STACKDUMP=y
diff --git a/nuttx/configs/hymini-stm32v/buttons/defconfig b/nuttx/configs/hymini-stm32v/buttons/defconfig
index 5038643192..a5792af4fd 100644
--- a/nuttx/configs/hymini-stm32v/buttons/defconfig
+++ b/nuttx/configs/hymini-stm32v/buttons/defconfig
@@ -155,14 +155,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=y
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/nsh/defconfig b/nuttx/configs/hymini-stm32v/nsh/defconfig
index 17aaf9f6cb..89d40eb584 100755
--- a/nuttx/configs/hymini-stm32v/nsh/defconfig
+++ b/nuttx/configs/hymini-stm32v/nsh/defconfig
@@ -153,14 +153,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103V specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/nsh2/defconfig b/nuttx/configs/hymini-stm32v/nsh2/defconfig
index 54574b26c5..8b835ee273 100644
--- a/nuttx/configs/hymini-stm32v/nsh2/defconfig
+++ b/nuttx/configs/hymini-stm32v/nsh2/defconfig
@@ -158,14 +158,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/nx/defconfig b/nuttx/configs/hymini-stm32v/nx/defconfig
index 2d3d03832c..7eeff113e4 100644
--- a/nuttx/configs/hymini-stm32v/nx/defconfig
+++ b/nuttx/configs/hymini-stm32v/nx/defconfig
@@ -153,14 +153,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103V specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/nxlines/defconfig b/nuttx/configs/hymini-stm32v/nxlines/defconfig
index 1dc04c0134..f2ca2651fd 100644
--- a/nuttx/configs/hymini-stm32v/nxlines/defconfig
+++ b/nuttx/configs/hymini-stm32v/nxlines/defconfig
@@ -157,14 +157,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103V specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/usbserial/defconfig b/nuttx/configs/hymini-stm32v/usbserial/defconfig
index 8f0e1f3d46..2f4b27f96b 100755
--- a/nuttx/configs/hymini-stm32v/usbserial/defconfig
+++ b/nuttx/configs/hymini-stm32v/usbserial/defconfig
@@ -155,14 +155,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103V specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/hymini-stm32v/usbstorage/defconfig b/nuttx/configs/hymini-stm32v/usbstorage/defconfig
index 85627dfda5..33c8b4db33 100755
--- a/nuttx/configs/hymini-stm32v/usbstorage/defconfig
+++ b/nuttx/configs/hymini-stm32v/usbstorage/defconfig
@@ -154,14 +154,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103V specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/kwikstik-k40/ostest/defconfig b/nuttx/configs/kwikstik-k40/ostest/defconfig
index 3f26570ce8..400ff88762 100755
--- a/nuttx/configs/kwikstik-k40/ostest/defconfig
+++ b/nuttx/configs/kwikstik-k40/ostest/defconfig
@@ -165,14 +165,6 @@ CONFIG_UART3_PARITY=0
 CONFIG_UART4_PARITY=0
 CONFIG_UART5_PARITY=0
 
-#
-# K40X256VLQ100 specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/olimex-stm32-p107/nsh/defconfig b/nuttx/configs/olimex-stm32-p107/nsh/defconfig
index 781dcd64ca..18858d5df2 100644
--- a/nuttx/configs/olimex-stm32-p107/nsh/defconfig
+++ b/nuttx/configs/olimex-stm32-p107/nsh/defconfig
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/olimex-stm32-p107/ostest/defconfig b/nuttx/configs/olimex-stm32-p107/ostest/defconfig
index ad07b7aa1c..5532a921f7 100644
--- a/nuttx/configs/olimex-stm32-p107/ostest/defconfig
+++ b/nuttx/configs/olimex-stm32-p107/ostest/defconfig
@@ -185,14 +185,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=y
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/README.txt b/nuttx/configs/stm3210e-eval/README.txt
index 0d292565eb..8582e95ff8 100755
--- a/nuttx/configs/stm3210e-eval/README.txt
+++ b/nuttx/configs/stm3210e-eval/README.txt
@@ -362,7 +362,7 @@ The on-board SRAM can be configured by setting
   CONFIG_STM32_FSMC=y                         : Enables the FSMC
   CONFIG_STM32_FSMC_SRAM=y                    : Enable external SRAM support
   CONFIG_HEAP2_BASE=0x68000000                : SRAM will be located at 0x680000000
-  CONFIG_HEAP2_END=(0x68000000+(1*1024*1024)) : The size of the SRAM is 1Mbyte
+  CONFIG_HEAP2_SIZE=1048576                   : The size of the SRAM is 1Mbyte
   CONFIG_MM_REGIONS=2                         : There will be two memory regions
                                               : in the heap
 
diff --git a/nuttx/configs/stm3210e-eval/RIDE/defconfig b/nuttx/configs/stm3210e-eval/RIDE/defconfig
index 4d87e2d2c8..942f3e4ba3 100755
--- a/nuttx/configs/stm3210e-eval/RIDE/defconfig
+++ b/nuttx/configs/stm3210e-eval/RIDE/defconfig
@@ -151,14 +151,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/buttons/defconfig b/nuttx/configs/stm3210e-eval/buttons/defconfig
index 08703af7d3..102b091407 100644
--- a/nuttx/configs/stm3210e-eval/buttons/defconfig
+++ b/nuttx/configs/stm3210e-eval/buttons/defconfig
@@ -162,14 +162,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=y
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/composite/defconfig b/nuttx/configs/stm3210e-eval/composite/defconfig
index 16415e793f..e79cdb8c02 100755
--- a/nuttx/configs/stm3210e-eval/composite/defconfig
+++ b/nuttx/configs/stm3210e-eval/composite/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nsh/defconfig b/nuttx/configs/stm3210e-eval/nsh/defconfig
index 3aedb6bd55..d5fd9a30c9 100755
--- a/nuttx/configs/stm3210e-eval/nsh/defconfig
+++ b/nuttx/configs/stm3210e-eval/nsh/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nsh2/defconfig b/nuttx/configs/stm3210e-eval/nsh2/defconfig
index a9d2790512..20e276a6ab 100644
--- a/nuttx/configs/stm3210e-eval/nsh2/defconfig
+++ b/nuttx/configs/stm3210e-eval/nsh2/defconfig
@@ -181,14 +181,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nx/defconfig b/nuttx/configs/stm3210e-eval/nx/defconfig
index 359e70969e..7a7eaf1d9d 100644
--- a/nuttx/configs/stm3210e-eval/nx/defconfig
+++ b/nuttx/configs/stm3210e-eval/nx/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nxconsole/defconfig b/nuttx/configs/stm3210e-eval/nxconsole/defconfig
index 4d30ed8eaa..6084a228a5 100644
--- a/nuttx/configs/stm3210e-eval/nxconsole/defconfig
+++ b/nuttx/configs/stm3210e-eval/nxconsole/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nxlines/defconfig b/nuttx/configs/stm3210e-eval/nxlines/defconfig
index 476f85e5fb..554b15f6f6 100644
--- a/nuttx/configs/stm3210e-eval/nxlines/defconfig
+++ b/nuttx/configs/stm3210e-eval/nxlines/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/nxtext/defconfig b/nuttx/configs/stm3210e-eval/nxtext/defconfig
index cef3a62467..4e95c11082 100644
--- a/nuttx/configs/stm3210e-eval/nxtext/defconfig
+++ b/nuttx/configs/stm3210e-eval/nxtext/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/ostest/defconfig b/nuttx/configs/stm3210e-eval/ostest/defconfig
index 18239c9958..cb93364334 100755
--- a/nuttx/configs/stm3210e-eval/ostest/defconfig
+++ b/nuttx/configs/stm3210e-eval/ostest/defconfig
@@ -161,14 +161,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/pm/defconfig b/nuttx/configs/stm3210e-eval/pm/defconfig
index 48b9e83b3b..370399882c 100644
--- a/nuttx/configs/stm3210e-eval/pm/defconfig
+++ b/nuttx/configs/stm3210e-eval/pm/defconfig
@@ -191,14 +191,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/usbserial/defconfig b/nuttx/configs/stm3210e-eval/usbserial/defconfig
index da13a876dd..829e551969 100755
--- a/nuttx/configs/stm3210e-eval/usbserial/defconfig
+++ b/nuttx/configs/stm3210e-eval/usbserial/defconfig
@@ -161,14 +161,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3210e-eval/usbstorage/defconfig b/nuttx/configs/stm3210e-eval/usbstorage/defconfig
index 05b5a288fa..72ef6cc672 100755
--- a/nuttx/configs/stm3210e-eval/usbstorage/defconfig
+++ b/nuttx/configs/stm3210e-eval/usbstorage/defconfig
@@ -160,14 +160,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM3210E-EVAL specific LCD settings
 #
diff --git a/nuttx/configs/stm3220g-eval/README.txt b/nuttx/configs/stm3220g-eval/README.txt
index bbd42cbc94..04585f69f4 100644
--- a/nuttx/configs/stm3220g-eval/README.txt
+++ b/nuttx/configs/stm3220g-eval/README.txt
@@ -352,7 +352,7 @@ The on-board SRAM can be configured by setting
   CONFIG_STM32_FSMC=y
   CONFIG_STM32_FSMC_SRAM=y
   CONFIG_HEAP2_BASE=0x64000000
-  CONFIG_HEAP2_END=(0x64000000+(2*1024*1024))
+  CONFIG_HEAP2_SIZE=2097152
   CONFIG_MM_REGIONS=2
 
 Configuration Options
@@ -368,7 +368,7 @@ NuttX configuration file:
                                FSMC (as opposed to an LCD or FLASH).
   CONFIG_HEAP2_BASE          : The base address of the SRAM in the FSMC
                                address space
-  CONFIG_HEAP2_END           : The end (+1) of the SRAM in the FSMC
+  CONFIG_HEAP2_SIZE          : The size of the SRAM in the FSMC
                                address space
   CONFIG_MM_REGIONS          : Must be set to a large enough value to
                                include the FSMC SRAM
@@ -475,9 +475,9 @@ STM3220G-EVAL-specific Configuration Options
     CONFIG_STM32_FSMC_SRAM - Indicates that SRAM is available via the
       FSMC (as opposed to an LCD or FLASH).
 
-    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space
+    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space (hex)
 
-    CONFIG_HEAP2_END - The end (+1) of the SRAM in the FSMC address space
+    CONFIG_HEAP2_SIZE - The size of the SRAM in the FSMC address space (decimal)
 
     CONFIG_ARCH_IRQPRIO - The STM3220xxx supports interrupt prioritization
 
diff --git a/nuttx/configs/stm3220g-eval/dhcpd/defconfig b/nuttx/configs/stm3220g-eval/dhcpd/defconfig
index d8cac6aabf..848121e04c 100644
--- a/nuttx/configs/stm3220g-eval/dhcpd/defconfig
+++ b/nuttx/configs/stm3220g-eval/dhcpd/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/nettest/defconfig b/nuttx/configs/stm3220g-eval/nettest/defconfig
index ebd176269c..7e660ad027 100644
--- a/nuttx/configs/stm3220g-eval/nettest/defconfig
+++ b/nuttx/configs/stm3220g-eval/nettest/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/nsh/defconfig b/nuttx/configs/stm3220g-eval/nsh/defconfig
index 937ce76861..48912bd8b9 100644
--- a/nuttx/configs/stm3220g-eval/nsh/defconfig
+++ b/nuttx/configs/stm3220g-eval/nsh/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/nsh2/defconfig b/nuttx/configs/stm3220g-eval/nsh2/defconfig
index 7e4d8127c7..c2ede9c67f 100644
--- a/nuttx/configs/stm3220g-eval/nsh2/defconfig
+++ b/nuttx/configs/stm3220g-eval/nsh2/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/nxwm/defconfig b/nuttx/configs/stm3220g-eval/nxwm/defconfig
index cbbdca2e32..6e69333255 100644
--- a/nuttx/configs/stm3220g-eval/nxwm/defconfig
+++ b/nuttx/configs/stm3220g-eval/nxwm/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=n
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/ostest/defconfig b/nuttx/configs/stm3220g-eval/ostest/defconfig
index 1ae110716d..d0ace11bce 100644
--- a/nuttx/configs/stm3220g-eval/ostest/defconfig
+++ b/nuttx/configs/stm3220g-eval/ostest/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3220g-eval/telnetd/defconfig b/nuttx/configs/stm3220g-eval/telnetd/defconfig
index f39e104bd5..2ff215afcf 100644
--- a/nuttx/configs/stm3220g-eval/telnetd/defconfig
+++ b/nuttx/configs/stm3220g-eval/telnetd/defconfig
@@ -78,7 +78,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -183,14 +183,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F20xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F20xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/README.txt b/nuttx/configs/stm3240g-eval/README.txt
index 15e8b9f3d1..151811189a 100755
--- a/nuttx/configs/stm3240g-eval/README.txt
+++ b/nuttx/configs/stm3240g-eval/README.txt
@@ -451,7 +451,7 @@ The on-board SRAM can be configured by setting
   CONFIG_STM32_FSMC=y
   CONFIG_STM32_FSMC_SRAM=y
   CONFIG_HEAP2_BASE=0x64000000
-  CONFIG_HEAP2_END=(0x64000000+(2*1024*1024))
+  CONFIG_HEAP2_SIZE=2097152
   CONFIG_MM_REGIONS=2 (or =3, see below)
 
 Configuration Options
@@ -472,7 +472,7 @@ present in the NuttX configuration file:
                                FSMC (as opposed to an LCD or FLASH).
   CONFIG_HEAP2_BASE          : The base address of the SRAM in the FSMC
                                address space
-  CONFIG_HEAP2_END           : The end (+1) of the SRAM in the FSMC
+  CONFIG_HEAP2_SIZE          : The size of the SRAM in the FSMC
                                address space
   CONFIG_MM_REGIONS          : Must be set to a large enough value to
                                include the FSMC SRAM
@@ -591,9 +591,9 @@ STM3240G-EVAL-specific Configuration Options
     CONFIG_STM32_FSMC_SRAM - Indicates that SRAM is available via the
       FSMC (as opposed to an LCD or FLASH).
 
-    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space
+    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space (hex)
 
-    CONFIG_HEAP2_END - The end (+1) of the SRAM in the FSMC address space
+    CONFIG_HEAP2_END - The size of the SRAM in the FSMC address space (decimal)
 
     CONFIG_ARCH_IRQPRIO - The STM3240xxx supports interrupt prioritization
 
diff --git a/nuttx/configs/stm3240g-eval/dhcpd/defconfig b/nuttx/configs/stm3240g-eval/dhcpd/defconfig
index a8372456f0..382ce61553 100644
--- a/nuttx/configs/stm3240g-eval/dhcpd/defconfig
+++ b/nuttx/configs/stm3240g-eval/dhcpd/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/nettest/defconfig b/nuttx/configs/stm3240g-eval/nettest/defconfig
index 500a8ab15b..9eb8f3d5ce 100644
--- a/nuttx/configs/stm3240g-eval/nettest/defconfig
+++ b/nuttx/configs/stm3240g-eval/nettest/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/nsh/defconfig b/nuttx/configs/stm3240g-eval/nsh/defconfig
index 4a0246ef43..8b2617ec05 100644
--- a/nuttx/configs/stm3240g-eval/nsh/defconfig
+++ b/nuttx/configs/stm3240g-eval/nsh/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/nsh2/defconfig b/nuttx/configs/stm3240g-eval/nsh2/defconfig
index e9e0c272f6..00d9dac0a2 100644
--- a/nuttx/configs/stm3240g-eval/nsh2/defconfig
+++ b/nuttx/configs/stm3240g-eval/nsh2/defconfig
@@ -84,7 +84,7 @@ CONFIG_STM32_CCMEXCLUDE=y
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -190,14 +190,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/nxconsole/defconfig b/nuttx/configs/stm3240g-eval/nxconsole/defconfig
index 8413a1b594..172d17b6ff 100644
--- a/nuttx/configs/stm3240g-eval/nxconsole/defconfig
+++ b/nuttx/configs/stm3240g-eval/nxconsole/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/nxwm/defconfig b/nuttx/configs/stm3240g-eval/nxwm/defconfig
index de8ebffaec..07bc408dcc 100644
--- a/nuttx/configs/stm3240g-eval/nxwm/defconfig
+++ b/nuttx/configs/stm3240g-eval/nxwm/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=n
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/ostest/defconfig b/nuttx/configs/stm3240g-eval/ostest/defconfig
index 58b86beea0..1f23047306 100644
--- a/nuttx/configs/stm3240g-eval/ostest/defconfig
+++ b/nuttx/configs/stm3240g-eval/ostest/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/telnetd/defconfig b/nuttx/configs/stm3240g-eval/telnetd/defconfig
index 39cde6b0fb..44a0f27baa 100644
--- a/nuttx/configs/stm3240g-eval/telnetd/defconfig
+++ b/nuttx/configs/stm3240g-eval/telnetd/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm3240g-eval/webserver/defconfig b/nuttx/configs/stm3240g-eval/webserver/defconfig
index 5c6e573d54..7bd8e52ceb 100644
--- a/nuttx/configs/stm3240g-eval/webserver/defconfig
+++ b/nuttx/configs/stm3240g-eval/webserver/defconfig
@@ -83,7 +83,7 @@ CONFIG_STM32_JTAG_SW_ENABLE=n
 #
 CONFIG_STM32_FSMC_SRAM=y
 CONFIG_HEAP2_BASE=0x64000000
-CONFIG_HEAP2_END=0x64200000
+CONFIG_HEAP2_SIZE=2097152
   
 #
 # Individual subsystems can be enabled:
@@ -189,14 +189,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/stm32f4discovery/README.txt b/nuttx/configs/stm32f4discovery/README.txt
index 93b8fee038..12b30c62c4 100755
--- a/nuttx/configs/stm32f4discovery/README.txt
+++ b/nuttx/configs/stm32f4discovery/README.txt
@@ -445,13 +445,13 @@ present in the NuttX configuration file:
 
   CONFIG_STM32_FSMC=y        : Enables the FSMC
   CONFIG_STM32_FSMC_SRAM=y   : Indicates that SRAM is available via the
-    FSMC (as opposed to an LCD or FLASH).
+                               FSMC (as opposed to an LCD or FLASH).
   CONFIG_HEAP2_BASE          : The base address of the SRAM in the FSMC
-    address space
-  CONFIG_HEAP2_END           : The end (+1) of the SRAM in the FSMC
-    address space
+                               address space
+  CONFIG_HEAP2_SIZE          : The size of the SRAM in the FSMC
+                               address space
   CONFIG_MM_REGIONS          : Must be set to a large enough value to
-    include the FSMC SRAM 
+                               include the FSMC SRAM 
 
 SRAM Configurations
 -------------------
@@ -704,9 +704,9 @@ STM32F4Discovery-specific Configuration Options
     CONFIG_STM32_FSMC_SRAM - Indicates that SRAM is available via the
       FSMC (as opposed to an LCD or FLASH).
 
-    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space
+    CONFIG_HEAP2_BASE - The base address of the SRAM in the FSMC address space (hex)
 
-    CONFIG_HEAP2_END - The end (+1) of the SRAM in the FSMC address space
+    CONFIG_HEAP2_SIZE - The size of the SRAM in the FSMC address space (decimal)
 
     CONFIG_ARCH_IRQPRIO - The STM32F4Discovery supports interrupt prioritization
 
diff --git a/nuttx/configs/stm32f4discovery/ostest/defconfig b/nuttx/configs/stm32f4discovery/ostest/defconfig
index c7cee2331f..5c120c6144 100644
--- a/nuttx/configs/stm32f4discovery/ostest/defconfig
+++ b/nuttx/configs/stm32f4discovery/ostest/defconfig
@@ -178,14 +178,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F40xxx specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # STM32F40xxx specific CAN device driver settings
 #
diff --git a/nuttx/configs/twr-k60n512/nsh/defconfig b/nuttx/configs/twr-k60n512/nsh/defconfig
index b9670c3984..ca1dbe3350 100644
--- a/nuttx/configs/twr-k60n512/nsh/defconfig
+++ b/nuttx/configs/twr-k60n512/nsh/defconfig
@@ -164,14 +164,6 @@ CONFIG_UART3_PARITY=0
 CONFIG_UART4_PARITY=0
 CONFIG_UART5_PARITY=0
 
-#
-# K40X256VLQ100 specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/twr-k60n512/ostest/defconfig b/nuttx/configs/twr-k60n512/ostest/defconfig
index 5d5b1245c5..1bb41c3108 100644
--- a/nuttx/configs/twr-k60n512/ostest/defconfig
+++ b/nuttx/configs/twr-k60n512/ostest/defconfig
@@ -164,14 +164,6 @@ CONFIG_UART3_PARITY=0
 CONFIG_UART4_PARITY=0
 CONFIG_UART5_PARITY=0
 
-#
-# K40X256VLQ100 specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=n
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # General build options
 #
diff --git a/nuttx/configs/vsn/nsh/defconfig b/nuttx/configs/vsn/nsh/defconfig
index 348a678448..0ee46dec07 100755
--- a/nuttx/configs/vsn/nsh/defconfig
+++ b/nuttx/configs/vsn/nsh/defconfig
@@ -3,7 +3,7 @@
 #
 #   Copyright (C) 2009-2010, 2012 Gregory Nutt. All rights reserved.
 #   Copyright (c) 2011 Uros Platise. All rights reserved.
-#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#   Author: Gregory Nutt <gnutt@nuttx.org>
 #           Uros Platise <uros.platise@isotel.eu>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -181,14 +181,6 @@ CONFIG_USART3_2STOP=0
 CONFIG_UART4_2STOP=0
 CONFIG_UART5_2STOP=0
 
-#
-# STM32F103Z specific SSI device driver settings
-#
-CONFIG_SSI0_DISABLE=y
-CONFIG_SSI1_DISABLE=y
-CONFIG_SSI_POLLWAIT=y
-#CONFIG_SSI_TXLIMIT=4
-
 #
 # OS support for I2C
 #
diff --git a/nuttx/mm/Kconfig b/nuttx/mm/Kconfig
index 000217dc5c..bf3540138f 100644
--- a/nuttx/mm/Kconfig
+++ b/nuttx/mm/Kconfig
@@ -3,15 +3,6 @@
 # see misc/tools/kconfig-language.txt.
 #
 
-config MM_REGIONS
-	int "Number of memory regions"
-	default 1
-	---help---
-		If the architecture includes multiple, non-contiguous regions of
-		memory to allocate from, this specifies the number of memory regions
-		that the memory manager must handle and enables the API
-		mm_addregion(start, end);
-
 config MM_SMALL
 	bool "Small memory model"
 	default n
@@ -24,3 +15,30 @@ config MM_SMALL
 		have internal SRAM of size less than or equal to 64Kb.  In this case,
 		CONFIG_MM_SMALL can be defined so that those MCUs will also benefit
 		from the smaller, 16-bit-based allocation overhead.
+
+config MM_REGIONS
+	int "Number of memory regions"
+	default 1
+	---help---
+		If the architecture includes multiple, non-contiguous regions of
+		memory to allocate from, this specifies the number of memory regions
+		that the memory manager must handle and enables the API
+		mm_addregion(start, end);
+
+config ARCH_HAVE_HEAP2
+	bool
+
+config HEAP2_BASE
+	hex "Start address of second heap region"
+	default 0x00000000
+	depends on ARCH_HAVE_HEAP2
+	---help---
+		The base address of the second heap region.
+
+config HEAP2_SIZE
+	int "Size of the second heap region"
+	default 0
+	depends on ARCH_HAVE_HEAP2
+	---help---
+		The size of the second heap region.
+