added basic code

5 files changed, 1098 insertions, 0 deletions

diff --git a/arduino/cores/nRF5/linker/gcc_startup_nrf52.S b/arduino/cores/nRF5/linker/gcc_startup_nrf52.S
new file mode 100755
index 0000000..2778fac
--- /dev/null
+++ b/arduino/cores/nRF5/linker/gcc_startup_nrf52.S
@@ -0,0 +1,421 @@
+/*
+ 
+Copyright (c) 2009-2018 ARM Limited. All rights reserved.
+
+    SPDX-License-Identifier: Apache-2.0
+
+Licensed under the Apache License, Version 2.0 (the License); you may
+not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an AS IS BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+NOTICE: This file has been modified by Nordic Semiconductor ASA.
+
+*/
+
+#ifdef NRF52832_XXAA
+
+    .syntax unified
+    .arch armv7e-m
+
+/* Adafruit define stack & heap inside linker script */
+/*
+#ifdef __STARTUP_CONFIG
+#include "startup_config.h"
+#ifndef __STARTUP_CONFIG_STACK_ALIGNEMENT
+#define __STARTUP_CONFIG_STACK_ALIGNEMENT 3
+#endif
+#endif
+
+    .section .stack
+#if defined(__STARTUP_CONFIG)
+    .align __STARTUP_CONFIG_STACK_ALIGNEMENT
+    .equ    Stack_Size, __STARTUP_CONFIG_STACK_SIZE
+#elif defined(__STACK_SIZE)
+    .align 3
+    .equ    Stack_Size, __STACK_SIZE
+#else
+    .align 3
+    .equ    Stack_Size, 8192
+#endif
+    .globl __StackTop
+    .globl __StackLimit
+__StackLimit:
+    .space Stack_Size
+    .size __StackLimit, . - __StackLimit
+__StackTop:
+    .size __StackTop, . - __StackTop
+
+    .section .heap
+    .align 3
+#if defined(__STARTUP_CONFIG)
+    .equ Heap_Size, __STARTUP_CONFIG_HEAP_SIZE
+#elif defined(__HEAP_SIZE)
+    .equ Heap_Size, __HEAP_SIZE
+#else
+    .equ Heap_Size, 8192
+#endif
+    .globl __HeapBase
+    .globl __HeapLimit
+__HeapBase:
+    .if Heap_Size
+    .space Heap_Size
+    .endif
+    .size __HeapBase, . - __HeapBase
+__HeapLimit:
+    .size __HeapLimit, . - __HeapLimit
+*/
+    .section .isr_vector
+    .align 2
+    .globl __isr_vector
+__isr_vector:
+    .long   __StackTop                  /* Top of Stack */
+    .long   Reset_Handler
+    .long   NMI_Handler
+    .long   HardFault_Handler
+    .long   MemoryManagement_Handler
+    .long   BusFault_Handler
+    .long   UsageFault_Handler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   SVC_Handler
+    .long   DebugMon_Handler
+    .long   0                           /*Reserved */
+    .long   PendSV_Handler
+    .long   SysTick_Handler
+
+  /* External Interrupts */
+    .long   POWER_CLOCK_IRQHandler
+    .long   RADIO_IRQHandler
+    .long   UARTE0_UART0_IRQHandler
+    .long   SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler
+    .long   SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQHandler
+    .long   NFCT_IRQHandler
+    .long   GPIOTE_IRQHandler
+    .long   SAADC_IRQHandler
+    .long   TIMER0_IRQHandler
+    .long   TIMER1_IRQHandler
+    .long   TIMER2_IRQHandler
+    .long   RTC0_IRQHandler
+    .long   TEMP_IRQHandler
+    .long   RNG_IRQHandler
+    .long   ECB_IRQHandler
+    .long   CCM_AAR_IRQHandler
+    .long   WDT_IRQHandler
+    .long   RTC1_IRQHandler
+    .long   QDEC_IRQHandler
+    .long   COMP_LPCOMP_IRQHandler
+    .long   SWI0_EGU0_IRQHandler
+    .long   SWI1_EGU1_IRQHandler
+    .long   SWI2_EGU2_IRQHandler
+    .long   SWI3_EGU3_IRQHandler
+    .long   SWI4_EGU4_IRQHandler
+    .long   SWI5_EGU5_IRQHandler
+    .long   TIMER3_IRQHandler
+    .long   TIMER4_IRQHandler
+    .long   PWM0_IRQHandler
+    .long   PDM_IRQHandler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   MWU_IRQHandler
+    .long   PWM1_IRQHandler
+    .long   PWM2_IRQHandler
+    .long   SPIM2_SPIS2_SPI2_IRQHandler
+    .long   RTC2_IRQHandler
+    .long   I2S_IRQHandler
+    .long   FPU_IRQHandler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+
+    .size __isr_vector, . - __isr_vector
+
+/* Reset Handler */
+
+
+    .text
+    .thumb
+    .thumb_func
+    .align 1
+    .globl Reset_Handler
+    .type Reset_Handler, %function
+Reset_Handler:
+
+
+/* Loop to copy data from read only memory to RAM.
+ * The ranges of copy from/to are specified by following symbols:
+ *      __etext: LMA of start of the section to copy from. Usually end of text
+ *      __data_start__: VMA of start of the section to copy to.
+ *      __bss_start__: VMA of end of the section to copy to. Normally __data_end__ is used, but by using __bss_start__
+ *                    the user can add their own initialized data section before BSS section with the INTERT AFTER command.
+ *
+ * All addresses must be aligned to 4 bytes boundary.
+ */
+    ldr r1, =__etext
+    ldr r2, =__data_start__
+    ldr r3, =__bss_start__
+
+    subs r3, r3, r2
+    ble .L_loop1_done
+
+.L_loop1:
+    subs r3, r3, #4
+    ldr r0, [r1,r3]
+    str r0, [r2,r3]
+    bgt .L_loop1
+
+.L_loop1_done:
+
+
+/* Adafruit fill stack region with pattern 0xADADADAD */
+    ldr     r0, =__StackLimit
+    ldr     r1, =__StackSize
+    ldr     r2, =0xADADADAD
+.L_fill:
+    str     r2, [r0]
+    adds    r0, 4
+    subs    r1, 4
+    bne     .L_fill
+
+/* This part of work usually is done in C library startup code. Otherwise,
+ * define __STARTUP_CLEAR_BSS to enable it in this startup. This section
+ * clears the RAM where BSS data is located.
+ *
+ * The BSS section is specified by following symbols
+ *    __bss_start__: start of the BSS section.
+ *    __bss_end__: end of the BSS section.
+ *
+ * All addresses must be aligned to 4 bytes boundary.
+ */
+#ifdef __STARTUP_CLEAR_BSS
+    ldr r1, =__bss_start__
+    ldr r2, =__bss_end__
+
+    movs r0, 0
+
+    subs r2, r2, r1
+    ble .L_loop3_done
+
+.L_loop3:
+    subs r2, r2, #4
+    str r0, [r1, r2]
+    bgt .L_loop3
+
+.L_loop3_done:
+#endif /* __STARTUP_CLEAR_BSS */
+
+/* Execute SystemInit function. */
+    bl SystemInit
+
+/* Call _start function provided by libraries.
+ * If those libraries are not accessible, define __START as your entry point.
+ */
+#ifndef __START
+#define __START _start
+#endif
+    bl __START
+
+    .pool
+    .size   Reset_Handler,.-Reset_Handler
+
+    .section ".text"
+
+
+/* Dummy Exception Handlers (infinite loops which can be modified) */
+
+    .weak   NMI_Handler
+    .type   NMI_Handler, %function
+NMI_Handler:
+    b       .
+    .size   NMI_Handler, . - NMI_Handler
+
+
+    .weak   HardFault_Handler
+    .type   HardFault_Handler, %function
+HardFault_Handler:
+    b       .
+    .size   HardFault_Handler, . - HardFault_Handler
+
+
+    .weak   MemoryManagement_Handler
+    .type   MemoryManagement_Handler, %function
+MemoryManagement_Handler:
+    b       .
+    .size   MemoryManagement_Handler, . - MemoryManagement_Handler
+
+
+    .weak   BusFault_Handler
+    .type   BusFault_Handler, %function
+BusFault_Handler:
+    b       .
+    .size   BusFault_Handler, . - BusFault_Handler
+
+
+    .weak   UsageFault_Handler
+    .type   UsageFault_Handler, %function
+UsageFault_Handler:
+    b       .
+    .size   UsageFault_Handler, . - UsageFault_Handler
+
+
+    .weak   SVC_Handler
+    .type   SVC_Handler, %function
+SVC_Handler:
+    b       .
+    .size   SVC_Handler, . - SVC_Handler
+
+
+    .weak   DebugMon_Handler
+    .type   DebugMon_Handler, %function
+DebugMon_Handler:
+    b       .
+    .size   DebugMon_Handler, . - DebugMon_Handler
+
+
+    .weak   PendSV_Handler
+    .type   PendSV_Handler, %function
+PendSV_Handler:
+    b       .
+    .size   PendSV_Handler, . - PendSV_Handler
+
+
+    .weak   SysTick_Handler
+    .type   SysTick_Handler, %function
+SysTick_Handler:
+    b       .
+    .size   SysTick_Handler, . - SysTick_Handler
+
+
+/* IRQ Handlers */
+
+    .globl  Default_Handler
+    .type   Default_Handler, %function
+Default_Handler:
+    b       .
+    .size   Default_Handler, . - Default_Handler
+
+    .macro  IRQ handler
+    .weak   \handler
+    .set    \handler, Default_Handler
+    .endm
+
+    IRQ  POWER_CLOCK_IRQHandler
+    IRQ  RADIO_IRQHandler
+    IRQ  UARTE0_UART0_IRQHandler
+    IRQ  SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler
+    IRQ  SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQHandler
+    IRQ  NFCT_IRQHandler
+    IRQ  GPIOTE_IRQHandler
+    IRQ  SAADC_IRQHandler
+    IRQ  TIMER0_IRQHandler
+    IRQ  TIMER1_IRQHandler
+    IRQ  TIMER2_IRQHandler
+    IRQ  RTC0_IRQHandler
+    IRQ  TEMP_IRQHandler
+    IRQ  RNG_IRQHandler
+    IRQ  ECB_IRQHandler
+    IRQ  CCM_AAR_IRQHandler
+    IRQ  WDT_IRQHandler
+    IRQ  RTC1_IRQHandler
+    IRQ  QDEC_IRQHandler
+    IRQ  COMP_LPCOMP_IRQHandler
+    IRQ  SWI0_EGU0_IRQHandler
+    IRQ  SWI1_EGU1_IRQHandler
+    IRQ  SWI2_EGU2_IRQHandler
+    IRQ  SWI3_EGU3_IRQHandler
+    IRQ  SWI4_EGU4_IRQHandler
+    IRQ  SWI5_EGU5_IRQHandler
+    IRQ  TIMER3_IRQHandler
+    IRQ  TIMER4_IRQHandler
+    IRQ  PWM0_IRQHandler
+    IRQ  PDM_IRQHandler
+    IRQ  MWU_IRQHandler
+    IRQ  PWM1_IRQHandler
+    IRQ  PWM2_IRQHandler
+    IRQ  SPIM2_SPIS2_SPI2_IRQHandler
+    IRQ  RTC2_IRQHandler
+    IRQ  I2S_IRQHandler
+    IRQ  FPU_IRQHandler
+
+  .end
+
+#endif
diff --git a/arduino/cores/nRF5/linker/gcc_startup_nrf52840.S b/arduino/cores/nRF5/linker/gcc_startup_nrf52840.S
new file mode 100755
index 0000000..20cfb27
--- /dev/null
+++ b/arduino/cores/nRF5/linker/gcc_startup_nrf52840.S
@@ -0,0 +1,425 @@
+/*
+ 
+Copyright (c) 2009-2018 ARM Limited. All rights reserved.
+
+    SPDX-License-Identifier: Apache-2.0
+
+Licensed under the Apache License, Version 2.0 (the License); you may
+not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an AS IS BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+NOTICE: This file has been modified by Nordic Semiconductor ASA.
+
+*/
+
+#ifdef NRF52840_XXAA
+
+    .syntax unified
+    .arch armv7e-m
+/* Adafruit define stack & heap inside linker script */
+/*
+#ifdef __STARTUP_CONFIG
+#include "startup_config.h"
+#ifndef __STARTUP_CONFIG_STACK_ALIGNEMENT
+#define __STARTUP_CONFIG_STACK_ALIGNEMENT 3
+#endif
+#endif
+
+    .section .stack
+#if defined(__STARTUP_CONFIG)
+    .align __STARTUP_CONFIG_STACK_ALIGNEMENT
+    .equ    Stack_Size, __STARTUP_CONFIG_STACK_SIZE
+#elif defined(__STACK_SIZE)
+    .align 3
+    .equ    Stack_Size, __STACK_SIZE
+#else
+    .align 3
+    .equ    Stack_Size, 8192
+#endif
+    .globl __StackTop
+    .globl __StackLimit
+__StackLimit:
+    .space Stack_Size
+    .size __StackLimit, . - __StackLimit
+__StackTop:
+    .size __StackTop, . - __StackTop
+
+    .section .heap
+    .align 3
+#if defined(__STARTUP_CONFIG)
+    .equ Heap_Size, __STARTUP_CONFIG_HEAP_SIZE
+#elif defined(__HEAP_SIZE)
+    .equ Heap_Size, __HEAP_SIZE
+#else
+    .equ Heap_Size, 8192
+#endif
+    .globl __HeapBase
+    .globl __HeapLimit
+__HeapBase:
+    .if Heap_Size
+    .space Heap_Size
+    .endif
+    .size __HeapBase, . - __HeapBase
+__HeapLimit:
+    .size __HeapLimit, . - __HeapLimit
+*/
+    .section .isr_vector
+    .align 2
+    .globl __isr_vector
+__isr_vector:
+    .long   __StackTop                  /* Top of Stack */
+    .long   Reset_Handler
+    .long   NMI_Handler
+    .long   HardFault_Handler
+    .long   MemoryManagement_Handler
+    .long   BusFault_Handler
+    .long   UsageFault_Handler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   SVC_Handler
+    .long   DebugMon_Handler
+    .long   0                           /*Reserved */
+    .long   PendSV_Handler
+    .long   SysTick_Handler
+
+  /* External Interrupts */
+    .long   POWER_CLOCK_IRQHandler
+    .long   RADIO_IRQHandler
+    .long   UARTE0_UART0_IRQHandler
+    .long   SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler
+    .long   SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQHandler
+    .long   NFCT_IRQHandler
+    .long   GPIOTE_IRQHandler
+    .long   SAADC_IRQHandler
+    .long   TIMER0_IRQHandler
+    .long   TIMER1_IRQHandler
+    .long   TIMER2_IRQHandler
+    .long   RTC0_IRQHandler
+    .long   TEMP_IRQHandler
+    .long   RNG_IRQHandler
+    .long   ECB_IRQHandler
+    .long   CCM_AAR_IRQHandler
+    .long   WDT_IRQHandler
+    .long   RTC1_IRQHandler
+    .long   QDEC_IRQHandler
+    .long   COMP_LPCOMP_IRQHandler
+    .long   SWI0_EGU0_IRQHandler
+    .long   SWI1_EGU1_IRQHandler
+    .long   SWI2_EGU2_IRQHandler
+    .long   SWI3_EGU3_IRQHandler
+    .long   SWI4_EGU4_IRQHandler
+    .long   SWI5_EGU5_IRQHandler
+    .long   TIMER3_IRQHandler
+    .long   TIMER4_IRQHandler
+    .long   PWM0_IRQHandler
+    .long   PDM_IRQHandler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   MWU_IRQHandler
+    .long   PWM1_IRQHandler
+    .long   PWM2_IRQHandler
+    .long   SPIM2_SPIS2_SPI2_IRQHandler
+    .long   RTC2_IRQHandler
+    .long   I2S_IRQHandler
+    .long   FPU_IRQHandler
+    .long   USBD_IRQHandler
+    .long   UARTE1_IRQHandler
+    .long   QSPI_IRQHandler
+    .long   CRYPTOCELL_IRQHandler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   PWM3_IRQHandler
+    .long   0                           /*Reserved */
+    .long   SPIM3_IRQHandler
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+    .long   0                           /*Reserved */
+
+    .size __isr_vector, . - __isr_vector
+
+/* Reset Handler */
+
+
+    .text
+    .thumb
+    .thumb_func
+    .align 1
+    .globl Reset_Handler
+    .type Reset_Handler, %function
+Reset_Handler:
+
+
+/* Loop to copy data from read only memory to RAM.
+ * The ranges of copy from/to are specified by following symbols:
+ *      __etext: LMA of start of the section to copy from. Usually end of text
+ *      __data_start__: VMA of start of the section to copy to.
+ *      __bss_start__: VMA of end of the section to copy to. Normally __data_end__ is used, but by using __bss_start__
+ *                    the user can add their own initialized data section before BSS section with the INTERT AFTER command.
+ *
+ * All addresses must be aligned to 4 bytes boundary.
+ */
+    ldr r1, =__etext
+    ldr r2, =__data_start__
+    ldr r3, =__bss_start__
+
+    subs r3, r3, r2
+    ble .L_loop1_done
+
+.L_loop1:
+    subs r3, r3, #4
+    ldr r0, [r1,r3]
+    str r0, [r2,r3]
+    bgt .L_loop1
+
+.L_loop1_done:
+
+/* Adafruit fill stack region with pattern 0xADADADAD */
+    ldr     r0, =__StackLimit
+    ldr     r1, =__StackSize
+    ldr     r2, =0xADADADAD
+.L_fill:
+    str     r2, [r0]
+    adds    r0, 4
+    subs    r1, 4
+    bne     .L_fill
+
+/* This part of work usually is done in C library startup code. Otherwise,
+ * define __STARTUP_CLEAR_BSS to enable it in this startup. This section
+ * clears the RAM where BSS data is located.
+ *
+ * The BSS section is specified by following symbols
+ *    __bss_start__: start of the BSS section.
+ *    __bss_end__: end of the BSS section.
+ *
+ * All addresses must be aligned to 4 bytes boundary.
+ */
+#ifdef __STARTUP_CLEAR_BSS
+    ldr r1, =__bss_start__
+    ldr r2, =__bss_end__
+
+    movs r0, 0
+
+    subs r2, r2, r1
+    ble .L_loop3_done
+
+.L_loop3:
+    subs r2, r2, #4
+    str r0, [r1, r2]
+    bgt .L_loop3
+
+.L_loop3_done:
+#endif /* __STARTUP_CLEAR_BSS */
+
+/* Execute SystemInit function. */
+    bl SystemInit
+
+/* Call _start function provided by libraries.
+ * If those libraries are not accessible, define __START as your entry point.
+ */
+#ifndef __START
+#define __START _start
+#endif
+    bl __START
+
+    .pool
+    .size   Reset_Handler,.-Reset_Handler
+
+    .section ".text"
+
+
+/* Dummy Exception Handlers (infinite loops which can be modified) */
+
+    .weak   NMI_Handler
+    .type   NMI_Handler, %function
+NMI_Handler:
+    b       .
+    .size   NMI_Handler, . - NMI_Handler
+
+
+    .weak   HardFault_Handler
+    .type   HardFault_Handler, %function
+HardFault_Handler:
+    b       .
+    .size   HardFault_Handler, . - HardFault_Handler
+
+
+    .weak   MemoryManagement_Handler
+    .type   MemoryManagement_Handler, %function
+MemoryManagement_Handler:
+    b       .
+    .size   MemoryManagement_Handler, . - MemoryManagement_Handler
+
+
+    .weak   BusFault_Handler
+    .type   BusFault_Handler, %function
+BusFault_Handler:
+    b       .
+    .size   BusFault_Handler, . - BusFault_Handler
+
+
+    .weak   UsageFault_Handler
+    .type   UsageFault_Handler, %function
+UsageFault_Handler:
+    b       .
+    .size   UsageFault_Handler, . - UsageFault_Handler
+
+
+    .weak   SVC_Handler
+    .type   SVC_Handler, %function
+SVC_Handler:
+    b       .
+    .size   SVC_Handler, . - SVC_Handler
+
+
+    .weak   DebugMon_Handler
+    .type   DebugMon_Handler, %function
+DebugMon_Handler:
+    b       .
+    .size   DebugMon_Handler, . - DebugMon_Handler
+
+
+    .weak   PendSV_Handler
+    .type   PendSV_Handler, %function
+PendSV_Handler:
+    b       .
+    .size   PendSV_Handler, . - PendSV_Handler
+
+
+    .weak   SysTick_Handler
+    .type   SysTick_Handler, %function
+SysTick_Handler:
+    b       .
+    .size   SysTick_Handler, . - SysTick_Handler
+
+
+/* IRQ Handlers */
+
+    .globl  Default_Handler
+    .type   Default_Handler, %function
+Default_Handler:
+    b       .
+    .size   Default_Handler, . - Default_Handler
+
+    .macro  IRQ handler
+    .weak   \handler
+    .set    \handler, Default_Handler
+    .endm
+
+    IRQ  POWER_CLOCK_IRQHandler
+    IRQ  RADIO_IRQHandler
+    IRQ  UARTE0_UART0_IRQHandler
+    IRQ  SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler
+    IRQ  SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1_IRQHandler
+    IRQ  NFCT_IRQHandler
+    IRQ  GPIOTE_IRQHandler
+    IRQ  SAADC_IRQHandler
+    IRQ  TIMER0_IRQHandler
+    IRQ  TIMER1_IRQHandler
+    IRQ  TIMER2_IRQHandler
+    IRQ  RTC0_IRQHandler
+    IRQ  TEMP_IRQHandler
+    IRQ  RNG_IRQHandler
+    IRQ  ECB_IRQHandler
+    IRQ  CCM_AAR_IRQHandler
+    IRQ  WDT_IRQHandler
+    IRQ  RTC1_IRQHandler
+    IRQ  QDEC_IRQHandler
+    IRQ  COMP_LPCOMP_IRQHandler
+    IRQ  SWI0_EGU0_IRQHandler
+    IRQ  SWI1_EGU1_IRQHandler
+    IRQ  SWI2_EGU2_IRQHandler
+    IRQ  SWI3_EGU3_IRQHandler
+    IRQ  SWI4_EGU4_IRQHandler
+    IRQ  SWI5_EGU5_IRQHandler
+    IRQ  TIMER3_IRQHandler
+    IRQ  TIMER4_IRQHandler
+    IRQ  PWM0_IRQHandler
+    IRQ  PDM_IRQHandler
+    IRQ  MWU_IRQHandler
+    IRQ  PWM1_IRQHandler
+    IRQ  PWM2_IRQHandler
+    IRQ  SPIM2_SPIS2_SPI2_IRQHandler
+    IRQ  RTC2_IRQHandler
+    IRQ  I2S_IRQHandler
+    IRQ  FPU_IRQHandler
+    IRQ  USBD_IRQHandler
+    IRQ  UARTE1_IRQHandler
+    IRQ  QSPI_IRQHandler
+    IRQ  CRYPTOCELL_IRQHandler
+    IRQ  PWM3_IRQHandler
+    IRQ  SPIM3_IRQHandler
+
+  .end
+
+#endif
diff --git a/arduino/cores/nRF5/linker/nrf52832_s132_v6.ld b/arduino/cores/nRF5/linker/nrf52832_s132_v6.ld
new file mode 100755
index 0000000..9c8af1f
--- /dev/null
+++ b/arduino/cores/nRF5/linker/nrf52832_s132_v6.ld
@@ -0,0 +1,39 @@
+/* Linker script to configure memory regions. */

+

+SEARCH_DIR(.)

+GROUP(-lgcc -lc -lnosys)

+

+MEMORY

+{

+  FLASH (rx)     : ORIGIN = 0x26000, LENGTH = 0x6D000-0x26000

+

+  /* SRAM required by S132 depend on

+   * - Attribute Table Size

+   * - Vendor UUID count

+   * - Max ATT MTU

+   * - Concurrent connection peripheral + central + secure links

+   * - Event Len, HVN queue, Write CMD queue

+   */ 

+  /* RAM (rwx) :  ORIGIN = 0x20003200, LENGTH = 0x20010000 - 0x20003200 */

+  RAM (rwx) :  ORIGIN = 0x20003400, LENGTH = 0x20010000 - 0x20003400

+}

+

+SECTIONS

+{

+  . = ALIGN(4);

+  .svc_data :

+  {

+    PROVIDE(__start_svc_data = .);

+    KEEP(*(.svc_data))

+    PROVIDE(__stop_svc_data = .);

+  } > RAM

+  

+  .fs_data :

+  {

+    PROVIDE(__start_fs_data = .);

+    KEEP(*(.fs_data))

+    PROVIDE(__stop_fs_data = .);

+  } > RAM

+} INSERT AFTER .data;

+

+INCLUDE "nrf52_common.ld"

diff --git a/arduino/cores/nRF5/linker/nrf52840_s140_v6.ld b/arduino/cores/nRF5/linker/nrf52840_s140_v6.ld
new file mode 100755
index 0000000..dc71846
--- /dev/null
+++ b/arduino/cores/nRF5/linker/nrf52840_s140_v6.ld
@@ -0,0 +1,38 @@
+/* Linker script to configure memory regions. */

+

+SEARCH_DIR(.)

+GROUP(-lgcc -lc -lnosys)

+

+MEMORY

+{

+  FLASH (rx)     : ORIGIN = 0x26000, LENGTH = 0xED000 - 0x26000

+

+  /* SRAM required by S132 depend on

+   * - Attribute Table Size

+   * - Vendor UUID count

+   * - Max ATT MTU

+   * - Concurrent connection peripheral + central + secure links

+   * - Event Len, HVN queue, Write CMD queue

+   */ 

+  RAM (rwx) :  ORIGIN = 0x20003400, LENGTH = 0x20040000 - 0x20003400

+}

+

+SECTIONS

+{

+  . = ALIGN(4);

+  .svc_data :

+  {

+    PROVIDE(__start_svc_data = .);

+    KEEP(*(.svc_data))

+    PROVIDE(__stop_svc_data = .);

+  } > RAM

+  

+  .fs_data :

+  {

+    PROVIDE(__start_fs_data = .);

+    KEEP(*(.fs_data))

+    PROVIDE(__stop_fs_data = .);

+  } > RAM

+} INSERT AFTER .data;

+

+INCLUDE "nrf52_common.ld"

diff --git a/arduino/cores/nRF5/linker/nrf52_common.ld b/arduino/cores/nRF5/linker/nrf52_common.ld
new file mode 100755
index 0000000..0695855
--- /dev/null
+++ b/arduino/cores/nRF5/linker/nrf52_common.ld
@@ -0,0 +1,175 @@
+/* Linker script for Nordic Semiconductor nRF52 devices

+ *

+ * Version: Sourcery G++ 4.5-1

+ * Support: https://support.codesourcery.com/GNUToolchain/

+ *

+ * Copyright (c) 2007, 2008, 2009, 2010 CodeSourcery, Inc.

+ *

+ * The authors hereby grant permission to use, copy, modify, distribute,

+ * and license this software and its documentation for any purpose, provided

+ * that existing copyright notices are retained in all copies and that this

+ * notice is included verbatim in any distributions.  No written agreement,

+ * license, or royalty fee is required for any of the authorized uses.

+ * Modifications to this software may be copyrighted by their authors

+ * and need not follow the licensing terms described here, provided that

+ * the new terms are clearly indicated on the first page of each file where

+ * they apply.

+ */

+OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")

+

+/* Linker script to place sections and symbol values. Should be used together

+ * with other linker script that defines memory regions FLASH and RAM.

+ * It references following symbols, which must be defined in code:

+ *   Reset_Handler : Entry of reset handler

+ * 

+ * It defines following symbols, which code can use without definition:

+ *   __exidx_start

+ *   __exidx_end

+ *   __etext

+ *   __data_start__

+ *   __preinit_array_start

+ *   __preinit_array_end

+ *   __init_array_start

+ *   __init_array_end

+ *   __fini_array_start

+ *   __fini_array_end

+ *   __data_end__

+ *   __bss_start__

+ *   __bss_end__

+ *   __end__

+ *   end

+ *   __HeapBase

+ *   __HeapLimit

+ *   __StackLimit

+ *   __StackTop

+ *   __stack

+ */

+ENTRY(Reset_Handler)

+

+/* Adafruit

+ * Stack is used by ISR and SoftDevice only, other code run on thread's allocated stack from heap. 

+ * Maximum stack used by S132's spec is 1536 byte. Therefore 2KB should be enough

+ */

+__StackSize = 1024*2;

+

+/* Set stack top to end of RAM, and stack limit move down by size of stack_dummy section */

+PROVIDE(__StackTop   = ORIGIN(RAM) + LENGTH(RAM));

+PROVIDE(__StackLimit = __StackTop - __StackSize);

+PROVIDE(__stack      = __StackTop);

+

+/* Flash region */

+__flash_arduino_start = ORIGIN(FLASH);

+__flash_arduino_end   = ORIGIN(FLASH) + LENGTH(FLASH);

+

+SECTIONS

+{

+    .text :

+    {

+        KEEP(*(.isr_vector))

+        *(.text*)

+

+        KEEP(*(.init))

+        KEEP(*(.fini))

+

+        /* .ctors */

+        *crtbegin.o(.ctors)

+        *crtbegin?.o(.ctors)

+        *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)

+        *(SORT(.ctors.*))

+        *(.ctors)

+

+        /* .dtors */

+        *crtbegin.o(.dtors)

+        *crtbegin?.o(.dtors)

+        *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)

+        *(SORT(.dtors.*))

+        *(.dtors)

+

+        *(.rodata*)

+

+        KEEP(*(.eh_frame*))

+    } > FLASH

+

+    .ARM.extab :

+    {

+        *(.ARM.extab* .gnu.linkonce.armextab.*)

+    } > FLASH

+

+    __exidx_start = .;

+    .ARM.exidx :

+    {

+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)

+    } > FLASH

+    __exidx_end = .;

+

+    __etext = .;

+

+    .data : AT (__etext)

+    {

+        __data_start__ = .;

+        *(vtable)

+        *(.data*)

+

+        . = ALIGN(4);

+        /* preinit data */

+        PROVIDE_HIDDEN (__preinit_array_start = .);

+        KEEP(*(.preinit_array))

+        PROVIDE_HIDDEN (__preinit_array_end = .);

+

+        . = ALIGN(4);

+        /* init data */

+        PROVIDE_HIDDEN (__init_array_start = .);

+        KEEP(*(SORT(.init_array.*)))

+        KEEP(*(.init_array))

+        PROVIDE_HIDDEN (__init_array_end = .);

+

+

+        . = ALIGN(4);

+        /* finit data */

+        PROVIDE_HIDDEN (__fini_array_start = .);

+        KEEP(*(SORT(.fini_array.*)))

+        KEEP(*(.fini_array))

+        PROVIDE_HIDDEN (__fini_array_end = .);

+

+        KEEP(*(.jcr*))

+        . = ALIGN(4);

+        /* All data end */

+        __data_end__ = .;

+

+    } > RAM

+

+    .bss :

+    {

+        . = ALIGN(4);

+        __bss_start__ = .;

+        *(.bss*)

+        *(COMMON)

+        . = ALIGN(4);

+        __bss_end__ = .;

+    } > RAM

+

+    .heap :

+    {

+        __HeapBase = .;

+        __end__ = .;

+        PROVIDE(end = .);

+        KEEP(*(.heap*))

+        . = ALIGN(__StackLimit);

+        __HeapLimit = .;

+    } > RAM

+    

+    /* .stack_dummy section doesn't contains any symbols. It is only

+     * used for linker to calculate size of stack sections, and assign

+     * values to stack symbols later */

+    /*

+    .stack_dummy (COPY):

+    {

+        KEEP(*(.stack*))

+    } > RAM

+    */

+    

+    /* Check if data + heap + stack exceeds RAM limit */

+    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")

+    ASSERT(__StackLimit >= __bss_end__, "region RAM overflowed with stack")

+}

+