Adding preliminary support for STM32F767 (Nucleo-144 F767ZI)

Globals.h

@@ -21,6 +21,8 @@
 
 #if defined(STM32F4XX) || defined(STM32F4)
 #include "stm32f4xx.h"
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
 #elif defined(STM32F105xC)
 #include "stm32f1xx.h"
 #include "STM32Utils.h"
@@ -30,6 +32,8 @@
 
 #if defined(__SAM3X8E__) || defined(STM32F105xC)
 #define  ARM_MATH_CM3
+#elif defined(STM32F7XX)
+#define  ARM_MATH_CM7
 #elif defined(STM32F4XX) || defined(STM32F4) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
 #define  ARM_MATH_CM4
 #else

IOSTM.cpp

@@ -22,7 +22,7 @@
 #include "Globals.h"
 #include "IO.h"
 
-#if defined(STM32F4XX) || defined(STM32F4)
+#if defined(STM32F4XX) || defined(STM32F4) || defined(STM32F7XX)
 
 #if defined(STM32F4_DISCOVERY)
 /*
@@ -333,8 +333,101 @@ EXT_CLK  PB8    input            CN5 Pin10
 #error "Either STM32F4_NUCLEO_MORPHO_HEADER or STM32F4_NUCLEO_ARDUINO_HEADER need to be defined in Config.h"
 #endif
 
+#elif defined(STM32F7_NUCLEO)
+/*
+Pin definitions for STM32F7 Nucleo boards (ST Morpho header):
+
+PTT      PB13   output           CN10 Pin30
+COSLED   PB14   output           CN10 Pin28
+LED      PB0    output           CN10 Pin11
+COS      PB15   input            CN10 Pin26
+
+DSTAR    PB10   output           CN10 Pin25
+DMR      PB4    output           CN10 Pin27
+YSF      PB5    output           CN10 Pin29
+P25      PB3    output           CN10 Pin
+
+MDSTAR   PC4    output           CN7 Pin34
+MDMR     PC5    output           CN7 Pin6
+MYSF     PC2    output           CN7 Pin35
+MP25     PC3    output           CN7 Pin37
+
+RX       PA0    analog input     CN7 Pin28
+RSSI     PA1    analog input     CN7 Pin30
+TX       PA4    analog output    CN7 Pin32
+
+EXT_CLK  PA15   input            CN7 Pin18
+*/
+
+#define PIN_COS           GPIO_Pin_15
+#define PORT_COS          GPIOB
+#define RCC_Per_COS       RCC_AHB1Periph_GPIOB
+
+#define PIN_PTT           GPIO_Pin_13
+#define PORT_PTT          GPIOB
+#define RCC_Per_PTT       RCC_AHB1Periph_GPIOB
+
+#define PIN_COSLED        GPIO_Pin_14
+#define PORT_COSLED       GPIOB
+#define RCC_Per_COSLED    RCC_AHB1Periph_GPIOB
+
+#define PIN_LED           GPIO_Pin_0
+#define PORT_LED          GPIOB
+#define RCC_Per_LED       RCC_AHB1Periph_GPIOB
+
+#define PIN_P25           GPIO_Pin_3
+#define PORT_P25          GPIOB
+#define RCC_Per_P25       RCC_AHB1Periph_GPIOB
+
+#define PIN_DSTAR         GPIO_Pin_10
+#define PORT_DSTAR        GPIOB
+#define RCC_Per_DSTAR     RCC_AHB1Periph_GPIOB
+
+#define PIN_DMR           GPIO_Pin_4
+#define PORT_DMR          GPIOB
+#define RCC_Per_DMR       RCC_AHB1Periph_GPIOB
+
+#define PIN_YSF           GPIO_Pin_5
+#define PORT_YSF          GPIOB
+#define RCC_Per_YSF       RCC_AHB1Periph_GPIOB
+
+#if defined(STM32F4_NUCLEO_MODE_PINS)
+#define PIN_MP25          GPIO_Pin_3
+#define PORT_MP25         GPIOC
+#define RCC_Per_MP25      RCC_AHB1Periph_GPIOC
+
+#define PIN_MDSTAR        GPIO_Pin_4
+#define PORT_MDSTAR       GPIOC
+#define RCC_Per_MDSTAR    RCC_AHB1Periph_GPIOC
+
+#define PIN_MDMR          GPIO_Pin_5
+#define PORT_MDMR         GPIOC
+#define RCC_Per_MDMR      RCC_AHB1Periph_GPIOC
+
+#define PIN_MYSF          GPIO_Pin_2
+#define PORT_MYSF         GPIOC
+#define RCC_Per_MYSF      RCC_AHB1Periph_GPIOC
+#endif
+
+#define PIN_EXT_CLK       GPIO_Pin_15
+#define SRC_EXT_CLK       GPIO_PinSource15
+#define PORT_EXT_CLK      GPIOA
+
+#define PIN_RX            GPIO_Pin_0
+#define PIN_RX_CH         ADC_Channel_0
+#define PORT_RX           GPIOA
+#define RCC_Per_RX        RCC_AHB1Periph_GPIOA
+
+#define PIN_RSSI          GPIO_Pin_1
+#define PIN_RSSI_CH       ADC_Channel_1
+#define PORT_RSSI         GPIOA
+#define RCC_Per_RSSI      RCC_AHB1Periph_GPIOA
+
+#define PIN_TX            GPIO_Pin_4
+#define PIN_TX_CH         DAC_Channel_1
+
 #else
-#error "Either STM32F4_DISCOVERY, STM32F4_PI or STM32F4_NUCLEO need to be defined"
+#error "Either STM32F4_DISCOVERY, STM32F4_PI, STM32F4_NUCLEO or STM32F7_NUCLEO need to be defined"
 #endif
 
 const uint16_t DC_OFFSET = 2048U;

MMDVM.cpp

@@ -18,7 +18,7 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#if defined(STM32F4XX) || defined(STM32F4) || defined(STM32F105xC)
+#if defined(STM32F4XX) || defined(STM32F4) || defined(STM32F7XX) || defined(STM32F105xC)
 
 #include "Config.h"
 #include "Globals.h"

Makefile.F7

@@ -0,0 +1,173 @@
+#  Copyright (C) 2016,2017 by Andy Uribe CA6JAU
+#  Copyright (C) 2016 by Jim McLaughlin KI6ZUM
+
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# GNU ARM Embedded Toolchain
+CC=arm-none-eabi-gcc
+CXX=arm-none-eabi-g++
+LD=arm-none-eabi-ld
+AR=arm-none-eabi-ar
+AS=arm-none-eabi-as
+CP=arm-none-eabi-objcopy
+OD=arm-none-eabi-objdump
+NM=arm-none-eabi-nm
+SIZE=arm-none-eabi-size
+A2L=arm-none-eabi-addr2line
+
+# Directory Structure
+BINDIR=bin
+
+# Find source files
+# "SystemRoot" is only defined in Windows
+ifdef SYSTEMROOT
+	ASOURCES=$(shell dir /S /B *.s)
+	CSOURCES=$(shell dir /S /B *.c)
+	CXXSOURCES=$(shell dir /S /B *.cpp)
+	CLEANCMD=del /S *.o *.hex *.bin *.elf GitVersion.h
+	MDBIN=md $@
+else ifdef SystemRoot
+	ASOURCES=$(shell dir /S /B *.s)
+	CSOURCES=$(shell dir /S /B *.c)
+	CXXSOURCES=$(shell dir /S /B *.cpp)
+	CLEANCMD=del /S *.o *.hex *.bin *.elf GitVersion.h
+	MDBIN=md $@
+else
+	ASOURCES=$(shell find . -name '*.s')
+	CSOURCES=$(shell find . -name '*.c')
+	CXXSOURCES=$(shell find . -name '*.cpp')
+	CLEANCMD=rm -f $(OBJECTS) $(BINDIR)/$(BINELF) $(BINDIR)/$(BINHEX) $(BINDIR)/$(BINBIN) GitVersion.h
+	MDBIN=mkdir $@
+endif
+
+# Default reference oscillator frequencies
+ifndef $(OSC)
+	ifeq ($(MAKECMDGOALS),pi)
+		OSC=12000000
+	else
+		OSC=8000000
+	endif
+endif
+
+# Find header directories
+INC= . STM32F7XX_Lib/CMSIS/Include/ STM32F7XX_Lib/Device/ STM32F7XX_Lib/STM32F7xx_StdPeriph_Driver/inc/
+INCLUDES=$(INC:%=-I%)
+
+# Find libraries
+INCLUDES_LIBS=STM32F7XX_Lib/CMSIS/Lib/GCC/libarm_cortexM7lfsp_math.a
+LINK_LIBS=
+
+# Create object list
+OBJECTS=$(ASOURCES:%.s=%.o)
+OBJECTS+=$(CSOURCES:%.c=%.o)
+OBJECTS+=$(CXXSOURCES:%.cpp=%.o)
+
+# Define output files ELF & IHEX
+BINELF=outp.elf
+BINHEX=outp.hex
+BINBIN=outp.bin
+
+# MCU FLAGS
+MCFLAGS=-mcpu=cortex-m7 -mthumb -mlittle-endian -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mthumb-interwork
+
+# COMPILE FLAGS
+# STM32F7 Nucleo-144-F767ZI board:
+DEFS_NUCLEO=-DUSE_HAL_DRIVER -DSTM32F767xx -DSTM32F7XX -DSTM32F7_NUCLEO -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
+
+CFLAGS=-c $(MCFLAGS) $(INCLUDES)
+CXXFLAGS=-c $(MCFLAGS) $(INCLUDES)
+
+# LINKER FLAGS
+LDSCRIPT=stm32f7xx_link.ld
+LDFLAGS =-T $(LDSCRIPT) $(MCFLAGS) --specs=nosys.specs $(INCLUDES_LIBS) $(LINK_LIBS)
+
+# Build Rules
+.PHONY: all release nucleo debug clean
+
+# Default target: STM32F7 Nucleo-144-F767ZI board
+all: nucleo
+
+nucleo: GitVersion.h
+nucleo: CFLAGS+=$(DEFS_NUCLEO) -Os -ffunction-sections -fdata-sections -fno-builtin -Wno-implicit -DCUSTOM_NEW -DNO_EXCEPTIONS
+nucleo: CXXFLAGS+=$(DEFS_NUCLEO) -Os -fno-exceptions -ffunction-sections -fdata-sections -fno-builtin -fno-rtti -DCUSTOM_NEW -DNO_EXCEPTIONS
+nucleo: LDFLAGS+=-Os --specs=nano.specs
+nucleo: release
+
+debug: CFLAGS+=-g
+debug: CXXFLAGS+=-g
+debug: LDFLAGS+=-g
+debug: release
+
+release: $(BINDIR)
+release: $(BINDIR)/$(BINHEX)
+release: $(BINDIR)/$(BINBIN)
+
+$(BINDIR):
+	$(MDBIN)
+
+$(BINDIR)/$(BINHEX): $(BINDIR)/$(BINELF)
+	$(CP) -O ihex $< $@
+	@echo "Objcopy from ELF to IHEX complete!\n"
+	
+$(BINDIR)/$(BINBIN): $(BINDIR)/$(BINELF)
+	$(CP) -O binary $< $@
+	@echo "Objcopy from ELF to BINARY complete!\n"
+
+$(BINDIR)/$(BINELF): $(OBJECTS)
+	$(CXX) $(OBJECTS) $(LDFLAGS) -o $@
+	@echo "Linking complete!\n"
+	$(SIZE) $(BINDIR)/$(BINELF)
+
+%.o: %.cpp
+	$(CXX) $(CXXFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+%.o: %.c
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Compiled "$<"!\n"
+
+%.o: %.s
+	$(CC) $(CFLAGS) $< -o $@
+	@echo "Assambled "$<"!\n"
+
+clean:
+	$(CLEANCMD)
+	
+deploy:
+ifneq ($(wildcard /usr/bin/openocd),)
+	/usr/bin/openocd -f /usr/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF) verify reset exit"
+endif
+
+ifneq ($(wildcard /usr/local/bin/openocd),)
+	/usr/local/bin/openocd -f /usr/local/share/openocd/scripts/interface/stlink-v2-1.cfg -f /usr/local/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF) verify reset exit"
+endif
+
+ifneq ($(wildcard /opt/openocd/bin/openocd),)
+	/opt/openocd/bin/openocd -f /opt/openocd/share/openocd/scripts/interface/stlink-v2-1.cfg -f /opt/openocd/share/openocd/scripts/target/stm32f7x.cfg -c "program bin/$(BINELF) verify reset exit"
+endif
+
+# Export the current git version if the index file exists, else 000...
+GitVersion.h:
+ifdef SYSTEMROOT
+	echo #define GITVERSION "0000000" > $@
+else ifdef SystemRoot
+	echo #define GITVERSION "0000000" > $@
+else
+ifneq ("$(wildcard .git/index)","")
+	echo "#define GITVERSION \"$(shell git rev-parse --short HEAD)\"" > $@
+else
+	echo "#define GITVERSION \"0000000\"" > $@
+endif
+endif

RSSIRB.h

@@ -24,6 +24,9 @@ Boston, MA  02110-1301, USA.
 #if defined(STM32F4XX) || defined(STM32F4)
 #include "stm32f4xx.h"
 #include <cstddef>
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#include <cstddef>
 #elif defined(STM32F105xC)
 #include "stm32f1xx.h"
 #include <cstddef>

SampleRB.h

@@ -24,6 +24,9 @@ Boston, MA  02110-1301, USA.
 #if defined(STM32F4XX) || defined(STM32F4)
 #include "stm32f4xx.h"
 #include <cstddef>
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#include <cstddef>
 #elif defined(STM32F105xC)
 #include "stm32f1xx.h"
 #include <cstddef>

SerialRB.h

@@ -24,6 +24,9 @@ Boston, MA  02110-1301, USA.
 #if defined(STM32F4XX) || defined(STM32F4)
 #include "stm32f4xx.h"
 #include <cstddef>
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#include <cstddef>
 #elif defined(STM32F105xC)
 #include "stm32f1xx.h"
 #include <cstddef>

SerialSTM.cpp

@@ -37,7 +37,7 @@ UART5  - TXD PC12 - RXD PD2 (Discovery, Pi and Nucleo with Morpho header)
 
 */
 
-#if defined(STM32F4XX) || defined(STM32F4)
+#if defined(STM32F4XX) || defined(STM32F4) || defined(STM32F7XX)
 
 #define TX_SERIAL_FIFO_SIZE 512U
 #define RX_SERIAL_FIFO_SIZE 512U
@@ -432,7 +432,7 @@ void WriteUSART2(const uint8_t* data, uint16_t length)
 #endif
 
 /* ************* USART3 ***************** */
-#if defined(STM32F4_DISCOVERY) || defined(STM32F4_PI)
+#if defined(STM32F4_DISCOVERY) || defined(STM32F4_PI) || defined(STM32F7_NUCLEO)
 
 volatile uint8_t  TXSerialfifo3[TX_SERIAL_FIFO_SIZE];
 volatile uint8_t  RXSerialfifo3[RX_SERIAL_FIFO_SIZE];
@@ -541,17 +541,34 @@ void USART3_IRQHandler()
    }
 }
 
+#if defined(STM32F7_NUCLEO)
+// USART3 - TXD PD8 - RXD PD9
+#define USART3_GPIO_PinSource_TX   GPIO_PinSource8
+#define USART3_GPIO_PinSource_RX   GPIO_PinSource9
+#define USART3_GPIO_Pin_TX         GPIO_Pin_8
+#define USART3_GPIO_Pin_RX         GPIO_Pin_9
+#define USART3_GPIO_PORT           GPIOD
+#define USART3_RCC_Periph          RCC_AHB1Periph_GPIOD
+#else
+// USART3 - TXD PC10 - RXD PC11
+#define USART3_GPIO_PinSource_TX   GPIO_PinSource10
+#define USART3_GPIO_PinSource_RX   GPIO_PinSource11
+#define USART3_GPIO_Pin_TX         GPIO_Pin_10
+#define USART3_GPIO_Pin_RX         GPIO_Pin_11
+#define USART3_GPIO_PORT           GPIOC
+#define USART3_RCC_Periph          RCC_AHB1Periph_GPIOC
+#endif
+
 void InitUSART3(int speed)
 {
-   // USART3 - TXD PC10 - RXD PC11
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
 
-   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
+   RCC_AHB1PeriphClockCmd(USART3_RCC_Periph, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
-   GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_USART3);
+   GPIO_PinAFConfig(USART3_GPIO_PORT, USART3_GPIO_PinSource_TX, GPIO_AF_USART3);
-   GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_USART3);
+   GPIO_PinAFConfig(USART3_GPIO_PORT, USART3_GPIO_PinSource_RX, GPIO_AF_USART3);
 
    // USART IRQ init
    NVIC_InitStructure.NVIC_IRQChannel    = USART3_IRQn;
@@ -565,9 +582,9 @@ void InitUSART3(int speed)
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
-   GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_10 | GPIO_Pin_11; //  Tx | Rx
+   GPIO_InitStructure.GPIO_Pin   = USART3_GPIO_Pin_TX | USART3_GPIO_Pin_RX; //  Tx | Rx
    GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;
-   GPIO_Init(GPIOC, &GPIO_InitStructure);
+   GPIO_Init(USART3_GPIO_PORT, &GPIO_InitStructure);
 
    // Configure USART baud rate
    USART_StructInit(&USART_InitStructure);
@@ -822,7 +839,7 @@ void CSerialPort::beginInt(uint8_t n, int speed)
 {
    switch (n) {
       case 1U:
-         #if defined(STM32F4_DISCOVERY)
+         #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
          InitUSART3(speed);
          #elif defined(STM32F4_PI)
          InitUSART1(speed);
@@ -846,7 +863,7 @@ int CSerialPort::availableInt(uint8_t n)
 {
    switch (n) {
       case 1U:
-         #if defined(STM32F4_DISCOVERY)
+         #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
          return AvailUSART3();
          #elif defined(STM32F4_PI)
          return AvailUSART1();
@@ -868,7 +885,7 @@ int CSerialPort::availableForWriteInt(uint8_t n)
 {
    switch (n) {
       case 1U:
-         #if defined(STM32F4_DISCOVERY)
+         #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
          return AvailForWriteUSART3();
          #elif defined(STM32F4_PI)
          return AvailForWriteUSART1();
@@ -890,7 +907,7 @@ uint8_t CSerialPort::readInt(uint8_t n)
 {
    switch (n) {
       case 1U:
-         #if defined(STM32F4_DISCOVERY)
+         #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
          return ReadUSART3();
          #elif defined(STM32F4_PI)
          return ReadUSART1();
@@ -912,7 +929,7 @@ void CSerialPort::writeInt(uint8_t n, const uint8_t* data, uint16_t length, bool
 {
    switch (n) {
       case 1U:
-         #if defined(STM32F4_DISCOVERY)
+         #if defined(STM32F4_DISCOVERY) || defined(STM32F7_NUCLEO)
          WriteUSART3(data, length);
          if (flush)
             TXSerialFlush3();

Utils.h

@@ -22,6 +22,9 @@
 #if defined(STM32F4XX) || defined(STM32F4)
 #include "stm32f4xx.h"
 #include <cstddef>
+#elif defined(STM32F7XX)
+#include "stm32f7xx.h"
+#include <cstddef>
 #elif defined(STM32F105xC)
 #include "stm32f1xx.h"
 #include <cstddef>

stm32f7xx_link.ld

@@ -0,0 +1,137 @@
+/*
+ *   Copyright (C) 2017 by Andy Uribe CA6JAU
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Required amount of heap and stack */
+_min_heap_size = 0x1000;
+_min_stack_size = 0x0800;
+
+/* The entry point in the interrupt vector table */
+ENTRY(Reset_Handler)
+
+/* Memory areas */
+MEMORY
+{
+	ROM (rx)      : ORIGIN = 0x08000000, LENGTH = 2048K    /* FLASH */
+	RAM (xrw)     : ORIGIN = 0x20000000, LENGTH = 512K     /* Main RAM */
+}
+
+/* Stack start address (end of 512K RAM) */
+_estack = ORIGIN(RAM) + LENGTH(RAM);
+
+SECTIONS
+{
+	.text : 
+	{ 
+		/* The interrupt vector table */
+		. = ALIGN(4);
+		KEEP(*(.isr_vector .isr_vector.*))
+		
+		/* The program code */
+		. = ALIGN(4);
+		*(.text .text*)
+		*(.rodata .rodata*)
+		
+		/* ARM-Thumb code */
+		*(.glue_7) *(.glue_7t)              
+		
+		. = ALIGN(4);
+		KEEP(*(.init))
+		KEEP(*(.fini))
+		
+		/* EABI C++ global constructors support */
+		. = ALIGN(4);
+		__preinit_array_start = .;
+		KEEP (*(.preinit_array))		
+		__preinit_array_end = .;
+		
+		/* EABI C++ global constructors support */
+		. = ALIGN(4);
+		__init_array_start = .;
+		KEEP (*(SORT(.init_array.*)))
+		KEEP (*(.init_array))
+		__init_array_end = .;
+		
+		/* EABI C++ global constructors support */
+		. = ALIGN(4);
+		__fini_array_start = .;
+		KEEP (*(.fini_array))
+		KEEP (*(SORT(.fini_array.*)))
+		__fini_array_end = .;
+
+	} > ROM
+ 
+ 	/* ARM sections containing exception unwinding information */
+	.ARM.extab : {
+		__extab_start = .;
+		*(.ARM.extab* .gnu.linkonce.armextab.*) 
+		__extab_end = .;
+	} > ROM
+	
+	/* ARM index entries for section unwinding */
+	.ARM.exidx : {
+		__exidx_start = .;
+		*(.ARM.exidx*)
+		__exidx_end = .;
+	} > ROM
+    
+    /* Start address for the initialization values of the .data section */
+	_sidata = .;
+
+	/* The .data section (initialized data) */
+	.data : AT ( _sidata )
+	{
+		. = ALIGN(4);
+		_sdata = . ;       /* Start address for the .data section */
+		*(.data .data*)
+		
+		. = ALIGN(4);
+		_edata = . ;       /* End address for the .data section */
+	} > RAM
+
+	/* The .bss section (uninitialized data) */
+	.bss :
+	{
+		. = ALIGN(4);
+		_sbss = .;         /* Start address for the .bss section */
+		__bss_start__ = _sbss;
+		*(.bss)
+		*(.bss*)
+		*(COMMON)
+		
+		. = ALIGN(4);
+		_ebss = . ;        /* End address for the .bss section */
+    	__bss_end__ = _ebss;
+	} > RAM
+
+	/* Space for heap and stack */
+	.heap_stack :
+	{
+		end = . ;		  		 /* 'end' symbol defines heap location */
+		_end = end ;
+		. = . + _min_heap_size;  /* Additional space for heap and stack */
+		. = . + _min_stack_size;
+	} > RAM
+
+	/* Remove information from the standard libraries */
+	/DISCARD/ :
+	{
+		libc.a ( * )
+		libm.a ( * )
+		libgcc.a ( * )
+	}
+}