From b1f8aa175e1770c25e0583fe14cc625c4f86bde8 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Tue, 14 May 2019 17:37:11 +0700
Subject: [PATCH] add linker and startup for lpcxpresso11u68 board

able to build and blink LED
---
 hw/bsp/lpcxpresso11u68/board.mk               |  39 ++
 .../lpcxpresso11u68/board_lpcxpresso11u68.c   |  26 +-
 hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c  | 352 ++++++++++++++++++
 hw/bsp/lpcxpresso11u68/lpc11u68.ld            | 242 ++++++++++++
 4 files changed, 640 insertions(+), 19 deletions(-)
 create mode 100644 hw/bsp/lpcxpresso11u68/board.mk
 create mode 100644 hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c
 create mode 100644 hw/bsp/lpcxpresso11u68/lpc11u68.ld

diff --git a/hw/bsp/lpcxpresso11u68/board.mk b/hw/bsp/lpcxpresso11u68/board.mk
new file mode 100644
index 000000000..a443cec4c
--- /dev/null
+++ b/hw/bsp/lpcxpresso11u68/board.mk
@@ -0,0 +1,39 @@
+CFLAGS += \
+  -mthumb \
+  -mabi=aapcs \
+  -mcpu=cortex-m0plus \
+  -nostdlib \
+  -DCORE_M0PLUS \
+  -D__VTOR_PRESENT=0 \
+  -DCFG_TUSB_MCU=OPT_MCU_LPC11UXX \
+  -D__USE_LPCOPEN \
+  '-DCFG_TUSB_MEM_SECTION= __attribute__((section(".data.$RAM3")))' \
+  '-DCFG_TUSB_MEM_ALIGN=__attribute__ ((aligned(64)))' 
+
+# All source paths should be relative to the top level.
+LD_FILE = hw/bsp/lpcxpresso11u68/lpc11u68.ld
+
+SRC_C += \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/chip_11u6x.c \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/clock_11u6x.c \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/gpio_11u6x.c \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/iocon_11u6x.c \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/syscon_11u6x.c \
+	hw/mcu/nxp/lpcopen/lpc_chip_11u6x/src/sysinit_11u6x.c
+
+INC += \
+	$(TOP)/hw/mcu/nxp/lpcopen/lpc_chip_11u6x/inc
+
+# For TinyUSB port source
+VENDOR = nxp
+CHIP_FAMILY = lpc11_13_15
+
+# For freeRTOS port source
+FREERTOS_PORT = ARM_CM0
+
+# For flash-jlink target
+JLINK_DEVICE = LPC11U68
+JLINK_IF = swd
+
+# flash using jlink
+flash: flash-jlink
diff --git a/hw/bsp/lpcxpresso11u68/board_lpcxpresso11u68.c b/hw/bsp/lpcxpresso11u68/board_lpcxpresso11u68.c
index e72044740..98f259459 100644
--- a/hw/bsp/lpcxpresso11u68/board_lpcxpresso11u68.c
+++ b/hw/bsp/lpcxpresso11u68/board_lpcxpresso11u68.c
@@ -31,14 +31,8 @@
 #define LED_PIN       17
 #define LED_STATE_ON  0
 
-static const struct {
-  uint8_t port;
-  uint8_t pin;
-} buttons[] = { { 0, 1 } };
-
-enum {
-  BOARD_BUTTON_COUNT = sizeof(buttons) / sizeof(buttons[0])
-};
+#define BUTTON_PORT   0
+#define BUTTON_PIN    1
 
 /* System oscillator rate and RTC oscillator rate */
 const uint32_t OscRateIn = 12000000;
@@ -78,14 +72,11 @@ void board_init(void)
 
   Chip_GPIO_Init(LPC_GPIO);
 
-  //------------- LED -------------//
+  // LED
   Chip_GPIO_SetPinDIROutput(LPC_GPIO, LED_PORT, LED_PIN);
 
-  //------------- BUTTON -------------//
-  //for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOSetDir(buttons[i].port, buttons[i].pin, 0);
-
-  //------------- UART -------------//
-  //UARTInit(CFG_UART_BAUDRATE);
+  // BUTTON
+  Chip_GPIO_SetPinDIRInput(LPC_GPIO, BUTTON_PORT, BUTTON_PIN);
 
   // USB
   Chip_USB_Init(); // Setup PLL clock, and power
@@ -123,9 +114,8 @@ void board_led_write(bool state)
 //--------------------------------------------------------------------+
 uint32_t board_button_read(void)
 {
-//  for(uint8_t i=0; i<BOARD_BUTTON_COUNT; i++) GPIOGetPinValue(buttons[i].port, buttons[i].pin);
-//  return GPIOGetPinValue(buttons[0].port, buttons[0].pin) ? 0 : 1; // button is active low
-  return 0;
+  // active low
+  return Chip_GPIO_GetPinState(LPC_GPIO, BUTTON_PORT, BUTTON_PIN) ? 0 : 1;
 }
 
 //--------------------------------------------------------------------+
@@ -133,7 +123,6 @@ uint32_t board_button_read(void)
 //--------------------------------------------------------------------+
 int board_uart_read(uint8_t* buf, int len)
 {
-//  *buffer = get_key(); TODO cannot find available code for uart getchar
   (void) buf;
   (void) len;
   return 0;
@@ -141,7 +130,6 @@ int board_uart_read(uint8_t* buf, int len)
 
 int board_uart_write(void const * buf, int len)
 {
-  //UARTSend(&c, 1);
   (void) buf;
   (void) len;
   return 0;
diff --git a/hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c b/hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c
new file mode 100644
index 000000000..16f5502af
--- /dev/null
+++ b/hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c
@@ -0,0 +1,352 @@
+//*****************************************************************************
+// LPC11U6x Microcontroller Startup code for use with LPCXpresso IDE
+//
+// Version : 140113
+//*****************************************************************************
+//
+// Copyright(C) NXP Semiconductors, 2014
+// All rights reserved.
+//
+// Software that is described herein is for illustrative purposes only
+// which provides customers with programming information regarding the
+// LPC products.  This software is supplied "AS IS" without any warranties of
+// any kind, and NXP Semiconductors and its licensor disclaim any and
+// all warranties, express or implied, including all implied warranties of
+// merchantability, fitness for a particular purpose and non-infringement of
+// intellectual property rights.  NXP Semiconductors assumes no responsibility
+// or liability for the use of the software, conveys no license or rights under any
+// patent, copyright, mask work right, or any other intellectual property rights in
+// or to any products. NXP Semiconductors reserves the right to make changes
+// in the software without notification. NXP Semiconductors also makes no
+// representation or warranty that such application will be suitable for the
+// specified use without further testing or modification.
+//
+// Permission to use, copy, modify, and distribute this software and its
+// documentation is hereby granted, under NXP Semiconductors' and its
+// licensor's relevant copyrights in the software, without fee, provided that it
+// is used in conjunction with NXP Semiconductors microcontrollers.  This
+// copyright, permission, and disclaimer notice must appear in all copies of
+// this code.
+//*****************************************************************************
+
+#if defined (__cplusplus)
+#ifdef __REDLIB__
+#error Redlib does not support C++
+#else
+//*****************************************************************************
+//
+// The entry point for the C++ library startup
+//
+//*****************************************************************************
+extern "C" {
+    extern void __libc_init_array(void);
+}
+#endif
+#endif
+
+#define WEAK __attribute__ ((weak))
+#define ALIAS(f) __attribute__ ((weak, alias (#f)))
+
+//*****************************************************************************
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+//*****************************************************************************
+#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
+// Declaration of external SystemInit function
+extern void SystemInit(void);
+#endif
+
+// Patch the AEABI integer divide functions to use MCU's romdivide library
+#ifdef __USE_ROMDIVIDE
+// Location in memory that holds the address of the ROM Driver table
+#define PTR_ROM_DRIVER_TABLE ((unsigned int *)(0x1FFF1FF8))
+// Variables to store addresses of idiv and udiv functions within MCU ROM
+unsigned int *pDivRom_idiv;
+unsigned int *pDivRom_uidiv;
+#endif
+
+//*****************************************************************************
+//
+// Forward declaration of the default handlers. These are aliased.
+// When the application defines a handler (with the same name), this will 
+// automatically take precedence over these weak definitions
+//
+//*****************************************************************************
+     void ResetISR(void);
+WEAK void NMI_Handler(void);
+WEAK void HardFault_Handler(void);
+WEAK void SVC_Handler(void);
+WEAK void PendSV_Handler(void);
+WEAK void SysTick_Handler(void);
+WEAK void IntDefaultHandler(void);
+//*****************************************************************************
+//
+// Forward declaration of the specific IRQ handlers. These are aliased
+// to the IntDefaultHandler, which is a 'forever' loop. When the application
+// defines a handler (with the same name), this will automatically take
+// precedence over these weak definitions
+//
+//*****************************************************************************
+void PIN_INT0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT2_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT3_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT4_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT5_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT6_IRQHandler (void) ALIAS(IntDefaultHandler);
+void PIN_INT7_IRQHandler (void) ALIAS(IntDefaultHandler);
+void GINT0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void GINT1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void I2C1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USART1_4_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USART2_3_IRQHandler (void) ALIAS(IntDefaultHandler);
+void SCT0_1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void SSP1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void I2C0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void TIMER16_0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void TIMER16_1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void TIMER32_0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void TIMER32_1_IRQHandler (void) ALIAS(IntDefaultHandler);
+void SSP0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USART0_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USB_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USB_FIQHandler (void) ALIAS(IntDefaultHandler);
+void ADCA_IRQHandler (void) ALIAS(IntDefaultHandler);
+void RTC_IRQHandler (void) ALIAS(IntDefaultHandler);
+void BOD_WDT_IRQHandler (void) ALIAS(IntDefaultHandler);
+void FMC_IRQHandler (void) ALIAS(IntDefaultHandler);
+void DMA_IRQHandler (void) ALIAS(IntDefaultHandler);
+void ADCB_IRQHandler (void) ALIAS(IntDefaultHandler);
+void USBWakeup_IRQHandler (void) ALIAS(IntDefaultHandler);
+
+//*****************************************************************************
+// The entry point for the application.
+// __main() is the entry point for redlib based applications
+// main() is the entry point for newlib based applications
+//*****************************************************************************
+#if defined (__REDLIB__)
+extern void __main(void);
+#endif
+extern int main(void);
+//*****************************************************************************
+//
+// External declaration for the pointer to the stack top from the Linker Script
+//
+//*****************************************************************************
+extern void _vStackTop(void);
+
+//*****************************************************************************
+#if defined (__cplusplus)
+} // extern "C"
+#endif
+//*****************************************************************************
+//
+// The vector table.  Note that the proper constructs must be placed on this to
+// ensure that it ends up at physical address 0x0000.0000.
+//
+//*****************************************************************************
+extern void (* const g_pfnVectors[])(void);
+__attribute__ ((section(".isr_vector"))) __attribute__ ((used))
+void (* const g_pfnVectors[])(void) = {
+    &_vStackTop,                     // The initial stack pointer
+    ResetISR,                        // The reset handler
+    NMI_Handler,                     // The NMI handler
+    HardFault_Handler,               // The hard fault handler
+    0,                               // Reserved
+    0,                               // Reserved
+    0,                               // Reserved
+    0,                               // Reserved
+    0,                               // Reserved
+    0,                               // Reserved
+    0,                               // Reserved
+    SVC_Handler,                     // SVCall handler
+    0,                               // Reserved
+    0,                               // Reserved
+    PendSV_Handler,                  // The PendSV handler
+    SysTick_Handler,                 // The SysTick handler
+
+    // LPC11U6x specific handlers
+    PIN_INT0_IRQHandler,             //  0 - GPIO pin interrupt 0
+    PIN_INT1_IRQHandler,             //  1 - GPIO pin interrupt 1
+    PIN_INT2_IRQHandler,             //  2 - GPIO pin interrupt 2
+    PIN_INT3_IRQHandler,             //  3 - GPIO pin interrupt 3
+    PIN_INT4_IRQHandler,             //  4 - GPIO pin interrupt 4
+    PIN_INT5_IRQHandler,             //  5 - GPIO pin interrupt 5
+    PIN_INT6_IRQHandler,             //  6 - GPIO pin interrupt 6
+    PIN_INT7_IRQHandler,             //  7 - GPIO pin interrupt 7
+    GINT0_IRQHandler,                //  8 - GPIO GROUP0 interrupt
+    GINT1_IRQHandler,                //  9 - GPIO GROUP1 interrupt
+    I2C1_IRQHandler,                 // 10 - I2C1
+    USART1_4_IRQHandler,             // 11 - combined USART1 & 4 interrupt
+    USART2_3_IRQHandler,             // 12 - combined USART2 & 3 interrupt
+    SCT0_1_IRQHandler,               // 13 - combined SCT0 and 1 interrupt
+    SSP1_IRQHandler,                 // 14 - SPI/SSP1 Interrupt
+    I2C0_IRQHandler,                 // 15 - I2C0
+    TIMER16_0_IRQHandler,            // 16 - CT16B0 (16-bit Timer 0)
+    TIMER16_1_IRQHandler,            // 17 - CT16B1 (16-bit Timer 1)
+    TIMER32_0_IRQHandler,            // 18 - CT32B0 (32-bit Timer 0)
+    TIMER32_1_IRQHandler,            // 19 - CT32B1 (32-bit Timer 1)
+    SSP0_IRQHandler,                 // 20 - SPI/SSP0 Interrupt
+    USART0_IRQHandler,               // 21 - USART0
+    USB_IRQHandler,                  // 22 - USB IRQ
+    USB_FIQHandler,                  // 23 - USB FIQ
+    ADCA_IRQHandler,                 // 24 - ADC A(A/D Converter)
+    RTC_IRQHandler,                  // 25 - Real Time CLock interrpt
+    BOD_WDT_IRQHandler,              // 25 - Combined Brownout/Watchdog interrupt
+    FMC_IRQHandler,                  // 27 - IP2111 Flash Memory Controller
+    DMA_IRQHandler,                  // 28 - DMA interrupt
+    ADCB_IRQHandler,                 // 24 - ADC B (A/D Converter)
+    USBWakeup_IRQHandler,            // 30 - USB wake-up interrupt
+    0,                               // 31 - Reserved
+};
+
+//*****************************************************************************
+// Functions to carry out the initialization of RW and BSS data sections. These
+// are written as separate functions rather than being inlined within the
+// ResetISR() function in order to cope with MCUs with multiple banks of
+// memory.
+//*****************************************************************************
+__attribute__ ((section(".after_vectors")))
+void data_init(unsigned int romstart, unsigned int start, unsigned int len) {
+    unsigned int *pulDest = (unsigned int*) start;
+    unsigned int *pulSrc = (unsigned int*) romstart;
+    unsigned int loop;
+    for (loop = 0; loop < len; loop = loop + 4)
+        *pulDest++ = *pulSrc++;
+}
+
+__attribute__ ((section(".after_vectors")))
+void bss_init(unsigned int start, unsigned int len) {
+    unsigned int *pulDest = (unsigned int*) start;
+    unsigned int loop;
+    for (loop = 0; loop < len; loop = loop + 4)
+        *pulDest++ = 0;
+}
+
+//*****************************************************************************
+// The following symbols are constructs generated by the linker, indicating
+// the location of various points in the "Global Section Table". This table is
+// created by the linker via the Code Red managed linker script mechanism. It
+// contains the load address, execution address and length of each RW data
+// section and the execution and length of each BSS (zero initialized) section.
+//*****************************************************************************
+extern unsigned int __data_section_table;
+extern unsigned int __data_section_table_end;
+extern unsigned int __bss_section_table;
+extern unsigned int __bss_section_table_end;
+
+//*****************************************************************************
+// Reset entry point for your code.
+// Sets up a simple runtime environment and initializes the C/C++
+// library.
+//*****************************************************************************
+__attribute__ ((section(".after_vectors")))
+void
+ResetISR(void) {
+
+    // Optionally enable RAM banks that may be off by default at reset
+#if !defined (DONT_ENABLE_DISABLED_RAMBANKS)
+    volatile unsigned int *SYSCON_SYSAHBCLKCTRL = (unsigned int *) 0x40048080;
+    // Ensure that RAM1(26) and USBSRAM(27) bits in SYSAHBCLKCTRL are set
+    *SYSCON_SYSAHBCLKCTRL |= (1 << 26) | (1 <<27);
+#endif
+
+    //
+    // Copy the data sections from flash to SRAM.
+    //
+    unsigned int LoadAddr, ExeAddr, SectionLen;
+    unsigned int *SectionTableAddr;
+
+    // Load base address of Global Section Table
+    SectionTableAddr = &__data_section_table;
+
+    // Copy the data sections from flash to SRAM.
+    while (SectionTableAddr < &__data_section_table_end) {
+        LoadAddr = *SectionTableAddr++;
+        ExeAddr = *SectionTableAddr++;
+        SectionLen = *SectionTableAddr++;
+        data_init(LoadAddr, ExeAddr, SectionLen);
+    }
+    // At this point, SectionTableAddr = &__bss_section_table;
+    // Zero fill the bss segment
+    while (SectionTableAddr < &__bss_section_table_end) {
+        ExeAddr = *SectionTableAddr++;
+        SectionLen = *SectionTableAddr++;
+        bss_init(ExeAddr, SectionLen);
+    }
+
+    // Patch the AEABI integer divide functions to use MCU's romdivide library
+#ifdef __USE_ROMDIVIDE
+    // Get address of Integer division routines function table in ROM
+    unsigned int *div_ptr = (unsigned int *)((unsigned int *)*(PTR_ROM_DRIVER_TABLE))[4];
+    // Get addresses of integer divide routines in ROM
+    // These address are then used by the code in aeabi_romdiv_patch.s
+    pDivRom_idiv = (unsigned int *)div_ptr[0];
+    pDivRom_uidiv = (unsigned int *)div_ptr[1];
+#endif
+
+#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
+    SystemInit();
+#endif
+
+#if defined (__cplusplus)
+    //
+    // Call C++ library initialisation
+    //
+    __libc_init_array();
+#endif
+
+#if defined (__REDLIB__)
+    // Call the Redlib library, which in turn calls main()
+    __main() ;
+#else
+    main();
+#endif
+    //
+    // main() shouldn't return, but if it does, we'll just enter an infinite loop
+    //
+    while (1) {
+        ;
+    }
+}
+
+//*****************************************************************************
+// Default exception handlers. Override the ones here by defining your own
+// handler routines in your application code.
+//*****************************************************************************
+__attribute__ ((section(".after_vectors")))
+void NMI_Handler(void)
+{   while(1) { }
+}
+__attribute__ ((section(".after_vectors")))
+void HardFault_Handler(void)
+{   while(1) { }
+}
+
+__attribute__ ((section(".after_vectors")))
+void SVC_Handler(void)
+{   while(1) { }
+}
+
+__attribute__ ((section(".after_vectors")))
+void PendSV_Handler(void)
+{   while(1) { }
+}
+
+__attribute__ ((section(".after_vectors")))
+void SysTick_Handler(void)
+{   while(1) { }
+}
+
+//*****************************************************************************
+//
+// Processor ends up here if an unexpected interrupt occurs or a specific
+// handler is not present in the application code.
+//
+//*****************************************************************************
+__attribute__ ((section(".after_vectors")))
+void IntDefaultHandler(void)
+{   while(1) { }
+}
diff --git a/hw/bsp/lpcxpresso11u68/lpc11u68.ld b/hw/bsp/lpcxpresso11u68/lpc11u68.ld
new file mode 100644
index 000000000..56d9e4b89
--- /dev/null
+++ b/hw/bsp/lpcxpresso11u68/lpc11u68.ld
@@ -0,0 +1,242 @@
+/*
+ * GENERATED FILE - DO NOT EDIT
+ * (c) Code Red Technologies Ltd, 2008-2013
+ * (c) NXP Semiconductors 2013-2019
+ * Generated linker script file for LPC11U68
+ * Created from linkscript.ldt by FMCreateLinkLibraries
+ * Using Freemarker v2.3.23
+ * MCUXpresso IDE v10.2.1 [Build 795] [2018-07-25] on May 14, 2019 4:55:54 PM
+ */
+
+MEMORY
+{
+  /* Define each memory region */
+  MFlash256 (rx) : ORIGIN = 0x0, LENGTH = 0x40000 /* 256K bytes (alias Flash) */  
+  Ram0_32 (rwx) : ORIGIN = 0x10000000, LENGTH = 0x8000 /* 32K bytes (alias RAM) */  
+  Ram1_2 (rwx) : ORIGIN = 0x20000000, LENGTH = 0x800 /* 2K bytes (alias RAM2) */  
+  Ram2USB_2 (rwx) : ORIGIN = 0x20004000, LENGTH = 0x800 /* 2K bytes (alias RAM3) */  
+}
+
+  /* Define a symbol for the top of each memory region */
+  __base_MFlash256 = 0x0  ; /* MFlash256 */  
+  __base_Flash = 0x0 ; /* Flash */  
+  __top_MFlash256 = 0x0 + 0x40000 ; /* 256K bytes */  
+  __top_Flash = 0x0 + 0x40000 ; /* 256K bytes */  
+  __base_Ram0_32 = 0x10000000  ; /* Ram0_32 */  
+  __base_RAM = 0x10000000 ; /* RAM */  
+  __top_Ram0_32 = 0x10000000 + 0x8000 ; /* 32K bytes */  
+  __top_RAM = 0x10000000 + 0x8000 ; /* 32K bytes */  
+  __base_Ram1_2 = 0x20000000  ; /* Ram1_2 */  
+  __base_RAM2 = 0x20000000 ; /* RAM2 */  
+  __top_Ram1_2 = 0x20000000 + 0x800 ; /* 2K bytes */  
+  __top_RAM2 = 0x20000000 + 0x800 ; /* 2K bytes */  
+  __base_Ram2USB_2 = 0x20004000  ; /* Ram2USB_2 */  
+  __base_RAM3 = 0x20004000 ; /* RAM3 */  
+  __top_Ram2USB_2 = 0x20004000 + 0x800 ; /* 2K bytes */  
+  __top_RAM3 = 0x20004000 + 0x800 ; /* 2K bytes */  
+
+ENTRY(ResetISR)
+
+SECTIONS
+{
+    /* MAIN TEXT SECTION */
+    .text : ALIGN(4)
+    {
+        FILL(0xff)
+        __vectors_start__ = ABSOLUTE(.) ;
+        KEEP(*(.isr_vector))
+        /* Global Section Table */
+        . = ALIGN(4) ;
+        __section_table_start = .;
+        __data_section_table = .;
+        LONG(LOADADDR(.data));
+        LONG(    ADDR(.data));
+        LONG(  SIZEOF(.data));
+        LONG(LOADADDR(.data_RAM2));
+        LONG(    ADDR(.data_RAM2));
+        LONG(  SIZEOF(.data_RAM2));
+        LONG(LOADADDR(.data_RAM3));
+        LONG(    ADDR(.data_RAM3));
+        LONG(  SIZEOF(.data_RAM3));
+        __data_section_table_end = .;
+        __bss_section_table = .;
+        LONG(    ADDR(.bss));
+        LONG(  SIZEOF(.bss));
+        LONG(    ADDR(.bss_RAM2));
+        LONG(  SIZEOF(.bss_RAM2));
+        LONG(    ADDR(.bss_RAM3));
+        LONG(  SIZEOF(.bss_RAM3));
+        __bss_section_table_end = .;
+        __section_table_end = . ;
+        /* End of Global Section Table */
+
+        *(.after_vectors*)
+
+    } > MFlash256
+
+    .text : ALIGN(4)
+    {
+       *(.text*)
+       *(.rodata .rodata.* .constdata .constdata.*)
+       . = ALIGN(4);
+    } > MFlash256
+    /*
+     * for exception handling/unwind - some Newlib functions (in common
+     * with C++ and STDC++) use this. 
+     */
+    .ARM.extab : ALIGN(4) 
+    {
+        *(.ARM.extab* .gnu.linkonce.armextab.*)
+    } > MFlash256
+
+    __exidx_start = .;
+
+    .ARM.exidx : ALIGN(4)
+    {
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+    } > MFlash256
+    __exidx_end = .;
+
+    _etext = .;
+        
+    /* possible MTB section for Ram1_2 */
+    .mtb_buffer_RAM2 (NOLOAD) :
+    {
+        KEEP(*(.mtb.$RAM2*))
+        KEEP(*(.mtb.$Ram1_2*))
+    } > Ram1_2
+
+    /* DATA section for Ram1_2 */
+
+    .data_RAM2 : ALIGN(4)
+    {
+        FILL(0xff)
+        PROVIDE(__start_data_RAM2 = .) ;
+        *(.ramfunc.$RAM2)
+        *(.ramfunc.$Ram1_2)
+        *(.data.$RAM2*)
+        *(.data.$Ram1_2*)
+        . = ALIGN(4) ;
+        PROVIDE(__end_data_RAM2 = .) ;
+     } > Ram1_2 AT>MFlash256
+    /* possible MTB section for Ram2USB_2 */
+    .mtb_buffer_RAM3 (NOLOAD) :
+    {
+        KEEP(*(.mtb.$RAM3*))
+        KEEP(*(.mtb.$Ram2USB_2*))
+    } > Ram2USB_2
+
+    /* DATA section for Ram2USB_2 */
+
+    .data_RAM3 : ALIGN(4)
+    {
+        FILL(0xff)
+        PROVIDE(__start_data_RAM3 = .) ;
+        *(.ramfunc.$RAM3)
+        *(.ramfunc.$Ram2USB_2)
+        *(.data.$RAM3*)
+        *(.data.$Ram2USB_2*)
+        . = ALIGN(4) ;
+        PROVIDE(__end_data_RAM3 = .) ;
+     } > Ram2USB_2 AT>MFlash256
+    /* MAIN DATA SECTION */
+        /* Default MTB section */
+        .mtb_buffer_default (NOLOAD) :
+        {
+           KEEP(*(.mtb*))
+        } > Ram0_32
+    .uninit_RESERVED : ALIGN(4)
+    {
+        KEEP(*(.bss.$RESERVED*))
+        . = ALIGN(4) ;
+        _end_uninit_RESERVED = .;
+    } > Ram0_32
+
+    /* Main DATA section (Ram0_32) */
+    .data : ALIGN(4)
+    {
+       FILL(0xff)
+       _data = . ;
+       *(vtable)
+       *(.ramfunc*)
+       *(.data*)
+       . = ALIGN(4) ;
+       _edata = . ;
+    } > Ram0_32 AT>MFlash256
+
+    /* BSS section for Ram1_2 */
+    .bss_RAM2 : ALIGN(4)
+    {
+       PROVIDE(__start_bss_RAM2 = .) ;
+       *(.bss.$RAM2*)
+       *(.bss.$Ram1_2*)
+       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
+       PROVIDE(__end_bss_RAM2 = .) ;
+    } > Ram1_2 
+
+    /* BSS section for Ram2USB_2 */
+    .bss_RAM3 : ALIGN(4)
+    {
+       PROVIDE(__start_bss_RAM3 = .) ;
+       *(.bss.$RAM3*)
+       *(.bss.$Ram2USB_2*)
+       . = ALIGN (. != 0 ? 4 : 1) ; /* avoid empty segment */
+       PROVIDE(__end_bss_RAM3 = .) ;
+    } > Ram2USB_2 
+
+    /* MAIN BSS SECTION */
+    .bss : ALIGN(4)
+    {
+        _bss = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(4) ;
+        _ebss = .;
+        PROVIDE(end = .);
+    } > Ram0_32
+
+    /* NOINIT section for Ram1_2 */
+    .noinit_RAM2 (NOLOAD) : ALIGN(4)
+    {
+       *(.noinit.$RAM2*)
+       *(.noinit.$Ram1_2*)
+       . = ALIGN(4) ;
+    } > Ram1_2 
+
+    /* NOINIT section for Ram2USB_2 */
+    .noinit_RAM3 (NOLOAD) : ALIGN(4)
+    {
+       *(.noinit.$RAM3*)
+       *(.noinit.$Ram2USB_2*)
+       . = ALIGN(4) ;
+    } > Ram2USB_2 
+
+    /* DEFAULT NOINIT SECTION */
+    .noinit (NOLOAD): ALIGN(4)
+    {
+        _noinit = .;
+        *(.noinit*) 
+         . = ALIGN(4) ;
+        _end_noinit = .;
+    } > Ram0_32
+    PROVIDE(_pvHeapStart = DEFINED(__user_heap_base) ? __user_heap_base : .);
+    PROVIDE(_vStackTop = DEFINED(__user_stack_top) ? __user_stack_top : __top_Ram0_32 - 0);
+
+    /* ## Create checksum value (used in startup) ## */
+    PROVIDE(__valid_user_code_checksum = 0 - 
+                                         (_vStackTop 
+                                         + (ResetISR + 1) 
+                                         + (( DEFINED(NMI_Handler) ? NMI_Handler : M0_NMI_Handler ) + 1) 
+                                         + (( DEFINED(HardFault_Handler) ? HardFault_Handler : M0_HardFault_Handler ) + 1) 
+                                         )
+           );
+
+    /* Provide basic symbols giving location and size of main text
+     * block, including initial values of RW data sections. Note that
+     * these will need extending to give a complete picture with
+     * complex images (e.g multiple Flash banks).
+     */
+    _image_start = LOADADDR(.text);
+    _image_end = LOADADDR(.data) + SIZEOF(.data);
+    _image_size = _image_end - _image_start;
+}
\ No newline at end of file