Blinking the LED works. Clocks should be set up correctly.

Everything works fine without USB being plugged in but faults (I think) when USB is plugged in. This is switched away from the USB code from the bootloader onto the USB code thats generated by Atmel Studio using the high level classes from ASF.

4 files changed, 687 insertions, 0 deletions

diff --git a/atmel-samd/asf/sam0/utils/cmsis/samd21/source/gcc/startup_samd21.c b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/gcc/startup_samd21.c
new file mode 100644
index 000000000..d2611b3d5
--- /dev/null
+++ b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/gcc/startup_samd21.c
@@ -0,0 +1,282 @@
+/**
+ * \file
+ *
+ * \brief gcc starttup file for SAMD21
+ *
+ * Copyright (c) 2016 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "samd21.h"
+
+/* Initialize segments */
+extern uint32_t _sfixed;
+extern uint32_t _efixed;
+extern uint32_t _etext;
+extern uint32_t _srelocate;
+extern uint32_t _erelocate;
+extern uint32_t _szero;
+extern uint32_t _ezero;
+extern uint32_t _sstack;
+extern uint32_t _estack;
+
+/** \cond DOXYGEN_SHOULD_SKIP_THIS */
+int main(void);
+/** \endcond */
+
+void __libc_init_array(void);
+
+/* Default empty handler */
+void Dummy_Handler(void);
+
+/* Cortex-M0+ core handlers */
+void NMI_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void HardFault_Handler       ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SVC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void PendSV_Handler          ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SysTick_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+
+/* Peripherals handlers */
+void PM_Handler              ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SYSCTRL_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void WDT_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void RTC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void EIC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void NVMCTRL_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void DMAC_Handler            ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#ifdef ID_USB
+void USB_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+void EVSYS_Handler           ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SERCOM0_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SERCOM1_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SERCOM2_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void SERCOM3_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#ifdef ID_SERCOM4
+void SERCOM4_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_SERCOM5
+void SERCOM5_Handler         ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+void TCC0_Handler            ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void TCC1_Handler            ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void TCC2_Handler            ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void TC3_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void TC4_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+void TC5_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#ifdef ID_TC6
+void TC6_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_TC7
+void TC7_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_ADC
+void ADC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_AC
+void AC_Handler              ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_DAC
+void DAC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_PTC
+void PTC_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_I2S
+void I2S_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+#ifdef ID_AC1
+void AC1_Handler             ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
+#endif
+
+/* Exception Table */
+__attribute__ ((section(".vectors")))
+const DeviceVectors exception_table = {
+
+        /* Configure Initial Stack Pointer, using linker-generated symbols */
+        .pvStack                = (void*) (&_estack),
+
+        .pfnReset_Handler       = (void*) Reset_Handler,
+        .pfnNMI_Handler         = (void*) NMI_Handler,
+        .pfnHardFault_Handler   = (void*) HardFault_Handler,
+        .pvReservedM12          = (void*) (0UL), /* Reserved */
+        .pvReservedM11          = (void*) (0UL), /* Reserved */
+        .pvReservedM10          = (void*) (0UL), /* Reserved */
+        .pvReservedM9           = (void*) (0UL), /* Reserved */
+        .pvReservedM8           = (void*) (0UL), /* Reserved */
+        .pvReservedM7           = (void*) (0UL), /* Reserved */
+        .pvReservedM6           = (void*) (0UL), /* Reserved */
+        .pfnSVC_Handler         = (void*) SVC_Handler,
+        .pvReservedM4           = (void*) (0UL), /* Reserved */
+        .pvReservedM3           = (void*) (0UL), /* Reserved */
+        .pfnPendSV_Handler      = (void*) PendSV_Handler,
+        .pfnSysTick_Handler     = (void*) SysTick_Handler,
+
+        /* Configurable interrupts */
+        .pfnPM_Handler          = (void*) PM_Handler,             /*  0 Power Manager */
+        .pfnSYSCTRL_Handler     = (void*) SYSCTRL_Handler,        /*  1 System Control */
+        .pfnWDT_Handler         = (void*) WDT_Handler,            /*  2 Watchdog Timer */
+        .pfnRTC_Handler         = (void*) RTC_Handler,            /*  3 Real-Time Counter */
+        .pfnEIC_Handler         = (void*) EIC_Handler,            /*  4 External Interrupt Controller */
+        .pfnNVMCTRL_Handler     = (void*) NVMCTRL_Handler,        /*  5 Non-Volatile Memory Controller */
+        .pfnDMAC_Handler        = (void*) DMAC_Handler,           /*  6 Direct Memory Access Controller */
+#ifdef ID_USB
+        .pfnUSB_Handler         = (void*) USB_Handler,            /*  7 Universal Serial Bus */
+#else
+        .pvReserved7            = (void*) (0UL),                  /*  7 Reserved */
+#endif
+        .pfnEVSYS_Handler       = (void*) EVSYS_Handler,          /*  8 Event System Interface */
+        .pfnSERCOM0_Handler     = (void*) SERCOM0_Handler,        /*  9 Serial Communication Interface 0 */
+        .pfnSERCOM1_Handler     = (void*) SERCOM1_Handler,        /* 10 Serial Communication Interface 1 */
+        .pfnSERCOM2_Handler     = (void*) SERCOM2_Handler,        /* 11 Serial Communication Interface 2 */
+        .pfnSERCOM3_Handler     = (void*) SERCOM3_Handler,        /* 12 Serial Communication Interface 3 */
+#ifdef ID_SERCOM4
+        .pfnSERCOM4_Handler     = (void*) SERCOM4_Handler,        /* 13 Serial Communication Interface 4 */
+#else
+        .pvReserved13           = (void*) (0UL),                  /* 13 Reserved */
+#endif
+#ifdef ID_SERCOM5
+        .pfnSERCOM5_Handler     = (void*) SERCOM5_Handler,        /* 14 Serial Communication Interface 5 */
+#else
+        .pvReserved14           = (void*) (0UL),                  /* 14 Reserved */
+#endif
+        .pfnTCC0_Handler        = (void*) TCC0_Handler,           /* 15 Timer Counter Control 0 */
+        .pfnTCC1_Handler        = (void*) TCC1_Handler,           /* 16 Timer Counter Control 1 */
+        .pfnTCC2_Handler        = (void*) TCC2_Handler,           /* 17 Timer Counter Control 2 */
+        .pfnTC3_Handler         = (void*) TC3_Handler,            /* 18 Basic Timer Counter 0 */
+        .pfnTC4_Handler         = (void*) TC4_Handler,            /* 19 Basic Timer Counter 1 */
+        .pfnTC5_Handler         = (void*) TC5_Handler,            /* 20 Basic Timer Counter 2 */
+#ifdef ID_TC6
+        .pfnTC6_Handler         = (void*) TC6_Handler,            /* 21 Basic Timer Counter 3 */
+#else
+        .pvReserved21           = (void*) (0UL),                  /* 21 Reserved */
+#endif
+#ifdef ID_TC7
+        .pfnTC7_Handler         = (void*) TC7_Handler,            /* 22 Basic Timer Counter 4 */
+#else
+        .pvReserved22           = (void*) (0UL),                  /* 22 Reserved */
+#endif
+#ifdef ID_ADC
+        .pfnADC_Handler         = (void*) ADC_Handler,            /* 23 Analog Digital Converter */
+#else
+        .pvReserved23           = (void*) (0UL),                  /* 23 Reserved */
+#endif
+#ifdef ID_AC
+        .pfnAC_Handler          = (void*) AC_Handler,             /* 24 Analog Comparators 0 */
+#else
+        .pvReserved24           = (void*) (0UL),                  /* 24 Reserved */
+#endif
+#ifdef ID_DAC
+        .pfnDAC_Handler         = (void*) DAC_Handler,            /* 25 Digital Analog Converter */
+#else
+        .pvReserved25           = (void*) (0UL),                  /* 25 Reserved */
+#endif
+#ifdef ID_PTC
+        .pfnPTC_Handler         = (void*) PTC_Handler,            /* 26 Peripheral Touch Controller */
+#else
+        .pvReserved26           = (void*) (0UL),                  /* 26 Reserved */
+#endif
+#ifdef ID_I2S
+        .pfnI2S_Handler         = (void*) I2S_Handler,            /* 27 Inter-IC Sound Interface */
+#else
+        .pvReserved27           = (void*) (0UL),                  /* 27 Reserved */
+#endif
+#ifdef ID_AC1
+        .pfnAC1_Handler         = (void*) AC1_Handler             /* 28 Analog Comparators 1 */
+#else
+        .pvReserved28           = (void*) (0UL)                   /* 28 Reserved */
+#endif
+};
+
+/**
+ * \brief This is the code that gets called on processor reset.
+ * To initialize the device, and call the main() routine.
+ */
+void Reset_Handler(void)
+{
+        uint32_t *pSrc, *pDest;
+
+        /* Initialize the relocate segment */
+        pSrc = &_etext;
+        pDest = &_srelocate;
+
+        if (pSrc != pDest) {
+                for (; pDest < &_erelocate;) {
+                        *pDest++ = *pSrc++;
+                }
+        }
+
+        /* Clear the zero segment */
+        for (pDest = &_szero; pDest < &_ezero;) {
+                *pDest++ = 0;
+        }
+
+        /* Set the vector table base address */
+        pSrc = (uint32_t *) & _sfixed;
+        SCB->VTOR = ((uint32_t) pSrc & SCB_VTOR_TBLOFF_Msk);
+
+        /* Change default QOS values to have the best performance and correct USB behaviour */
+        SBMATRIX->SFR[SBMATRIX_SLAVE_HMCRAMC0].reg = 2;
+#if defined(ID_USB)
+        USB->DEVICE.QOSCTRL.bit.CQOS = 2;
+        USB->DEVICE.QOSCTRL.bit.DQOS = 2;
+#endif
+        DMAC->QOSCTRL.bit.DQOS = 2;
+        DMAC->QOSCTRL.bit.FQOS = 2;
+        DMAC->QOSCTRL.bit.WRBQOS = 2;
+
+        /* Overwriting the default value of the NVMCTRL.CTRLB.MANW bit (errata reference 13134) */
+        NVMCTRL->CTRLB.bit.MANW = 1;
+
+        /* Initialize the C library */
+        __libc_init_array();
+
+        /* Branch to main function */
+        main();
+
+        /* Infinite loop */
+        while (1);
+}
+
+/**
+ * \brief Default interrupt handler for unused IRQs.
+ */
+void Dummy_Handler(void)
+{
+        while (1) {
+        }
+}
diff --git a/atmel-samd/asf/sam0/utils/cmsis/samd21/source/iar/startup_samd21.c b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/iar/startup_samd21.c
new file mode 100644
index 000000000..2e8aae7d8
--- /dev/null
+++ b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/iar/startup_samd21.c
@@ -0,0 +1,259 @@
+/**
+ * \file
+ *
+ * Copyright (c) 2016 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "samd21.h"
+
+typedef void (*intfunc) (void);
+typedef union { intfunc __fun; void * __ptr; } intvec_elem;
+
+void __iar_program_start(void);
+int __low_level_init(void);
+
+/* Default empty handler */
+void Dummy_Handler(void);
+
+/* Cortex-M0+ core handlers */
+#pragma weak NMI_Handler              = Dummy_Handler
+#pragma weak HardFault_Handler        = Dummy_Handler
+#pragma weak SVC_Handler              = Dummy_Handler
+#pragma weak PendSV_Handler           = Dummy_Handler
+#pragma weak SysTick_Handler          = Dummy_Handler
+
+/* Peripherals handlers */
+#pragma weak PM_Handler               = Dummy_Handler
+#pragma weak SYSCTRL_Handler          = Dummy_Handler
+#pragma weak WDT_Handler              = Dummy_Handler
+#pragma weak RTC_Handler              = Dummy_Handler
+#pragma weak EIC_Handler              = Dummy_Handler
+#pragma weak NVMCTRL_Handler          = Dummy_Handler
+#pragma weak DMAC_Handler             = Dummy_Handler
+#ifdef       ID_USB
+#pragma weak USB_Handler              = Dummy_Handler
+#endif
+#pragma weak EVSYS_Handler            = Dummy_Handler
+#pragma weak SERCOM0_Handler          = Dummy_Handler
+#pragma weak SERCOM1_Handler          = Dummy_Handler
+#pragma weak SERCOM2_Handler          = Dummy_Handler
+#pragma weak SERCOM3_Handler          = Dummy_Handler
+#ifdef       ID_SERCOM4
+#pragma weak SERCOM4_Handler          = Dummy_Handler
+#endif
+#ifdef       ID_SERCOM5
+#pragma weak SERCOM5_Handler          = Dummy_Handler
+#endif
+#pragma weak TCC0_Handler             = Dummy_Handler
+#pragma weak TCC1_Handler             = Dummy_Handler
+#pragma weak TCC2_Handler             = Dummy_Handler
+#pragma weak TC3_Handler              = Dummy_Handler
+#pragma weak TC4_Handler              = Dummy_Handler
+#pragma weak TC5_Handler              = Dummy_Handler
+#ifdef       ID_TC6
+#pragma weak TC6_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_TC7
+#pragma weak TC7_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_ADC
+#pragma weak ADC_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_AC
+#pragma weak AC_Handler               = Dummy_Handler
+#endif
+#ifdef       ID_DAC
+#pragma weak DAC_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_PTC
+#pragma weak PTC_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_I2S
+#pragma weak I2S_Handler              = Dummy_Handler
+#endif
+#ifdef       ID_AC1
+#pragma weak AC1_Handler              = Dummy_Handler
+#endif
+
+/* Exception Table */
+#pragma language = extended
+#pragma segment  = "CSTACK"
+
+/* The name "__vector_table" has special meaning for C-SPY: */
+/* it is where the SP start value is found, and the NVIC vector */
+/* table register (VTOR) is initialized to this address if != 0 */
+
+#pragma section  = ".intvec"
+#pragma location = ".intvec"
+const DeviceVectors __vector_table[] = {
+        (void*) __sfe("CSTACK"),
+        (void*) Reset_Handler,
+        (void*) NMI_Handler,
+        (void*) HardFault_Handler,
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) SVC_Handler,
+        (void*) (0UL), /* Reserved */
+        (void*) (0UL), /* Reserved */
+        (void*) PendSV_Handler,
+        (void*) SysTick_Handler,
+
+        /* Configurable interrupts */
+        (void*) PM_Handler,             /*  0 Power Manager */
+        (void*) SYSCTRL_Handler,        /*  1 System Control */
+        (void*) WDT_Handler,            /*  2 Watchdog Timer */
+        (void*) RTC_Handler,            /*  3 Real-Time Counter */
+        (void*) EIC_Handler,            /*  4 External Interrupt Controller */
+        (void*) NVMCTRL_Handler,        /*  5 Non-Volatile Memory Controller */
+        (void*) DMAC_Handler,           /*  6 Direct Memory Access Controller */
+#ifdef ID_USB
+        (void*) USB_Handler,            /*  7 Universal Serial Bus */
+#else
+        (void*) (0UL),                  /*  7 Reserved */
+#endif
+        (void*) EVSYS_Handler,          /*  8 Event System Interface */
+        (void*) SERCOM0_Handler,        /*  9 Serial Communication Interface 0 */
+        (void*) SERCOM1_Handler,        /* 10 Serial Communication Interface 1 */
+        (void*) SERCOM2_Handler,        /* 11 Serial Communication Interface 2 */
+        (void*) SERCOM3_Handler,        /* 12 Serial Communication Interface 3 */
+#ifdef ID_SERCOM4
+        (void*) SERCOM4_Handler,        /* 13 Serial Communication Interface 4 */
+#else
+        (void*) (0UL),                  /* 13 Reserved */
+#endif
+#ifdef ID_SERCOM5
+        (void*) SERCOM5_Handler,        /* 14 Serial Communication Interface 5 */
+#else
+        (void*) (0UL),                  /* 14 Reserved */
+#endif
+        (void*) TCC0_Handler,           /* 15 Timer Counter Control 0 */
+        (void*) TCC1_Handler,           /* 16 Timer Counter Control 1 */
+        (void*) TCC2_Handler,           /* 17 Timer Counter Control 2 */
+        (void*) TC3_Handler,            /* 18 Basic Timer Counter 0 */
+        (void*) TC4_Handler,            /* 19 Basic Timer Counter 1 */
+        (void*) TC5_Handler,            /* 20 Basic Timer Counter 2 */
+#ifdef ID_TC6
+        (void*) TC6_Handler,            /* 21 Basic Timer Counter 3 */
+#else
+        (void*) (0UL),                  /* 21 Reserved */
+#endif
+#ifdef ID_TC7
+        (void*) TC7_Handler,            /* 22 Basic Timer Counter 4 */
+#else
+        (void*) (0UL),                  /* 22 Reserved */
+#endif
+#ifdef ID_ADC
+        (void*) ADC_Handler,            /* 23 Analog Digital Converter */
+#else
+        (void*) (0UL),                  /* 23 Reserved */
+#endif
+#ifdef ID_AC
+        (void*) AC_Handler,             /* 24 Analog Comparators 0 */
+#else
+        (void*) (0UL),                  /* 24 Reserved */
+#endif
+#ifdef ID_DAC
+        (void*) DAC_Handler,            /* 25 Digital Analog Converter */
+#else
+        (void*) (0UL),                  /* 25 Reserved */
+#endif
+#ifdef ID_PTC
+        (void*) PTC_Handler,            /* 26 Peripheral Touch Controller */
+#else
+        (void*) (0UL),                  /* 26 Reserved */
+#endif
+#ifdef ID_I2S
+        (void*) I2S_Handler,            /* 27 Inter-IC Sound Interface */
+#else
+        (void*) (0UL),                  /* 27 Reserved */
+#endif
+#ifdef ID_AC1
+        (void*) AC1_Handler             /* 28 Analog Comparators 1 */
+#else
+        (void*) (0UL)                   /* 28 Reserved */
+#endif
+};
+
+/**------------------------------------------------------------------------------
+ * This is the code that gets called on processor reset. To initialize the
+ * device.
+ *------------------------------------------------------------------------------*/
+int __low_level_init(void)
+{
+        uint32_t *pSrc = __section_begin(".intvec");
+
+        SCB->VTOR = ((uint32_t) pSrc & SCB_VTOR_TBLOFF_Msk);
+
+        return 1; /* if return 0, the data sections will not be initialized */
+}
+
+/**------------------------------------------------------------------------------
+ * This is the code that gets called on processor reset. To initialize the
+ * device.
+ *------------------------------------------------------------------------------*/
+void Reset_Handler(void)
+{
+        /* Change default QOS values to have the best performance and correct USB behaviour */
+        SBMATRIX->SFR[SBMATRIX_SLAVE_HMCRAMC0].reg = 2;
+#if defined(ID_USB)
+        USB->DEVICE.QOSCTRL.bit.CQOS = 2;
+        USB->DEVICE.QOSCTRL.bit.DQOS = 2;
+#endif
+        DMAC->QOSCTRL.bit.DQOS = 2;
+        DMAC->QOSCTRL.bit.FQOS = 2;
+        DMAC->QOSCTRL.bit.WRBQOS = 2;
+
+        /* Overwriting the default value of the NVMCTRL.CTRLB.MANW bit (errata reference 13134) */
+        NVMCTRL->CTRLB.bit.MANW = 1;
+
+        __iar_program_start();
+}
+
+/**
+ * \brief Default interrupt handler for unused IRQs.
+ */
+void Dummy_Handler(void)
+{
+        while (1) {
+        }
+}
diff --git a/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.c b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.c
new file mode 100644
index 000000000..f3ebdc8b7
--- /dev/null
+++ b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.c
@@ -0,0 +1,81 @@
+/**
+ * \file
+ *
+ * \brief Low-level initialization functions called upon chip startup.
+ *
+ * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/*
+ * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+ */
+
+#include "samd21.h"
+
+/**
+ * Initial system clock frequency. The System RC Oscillator (RCSYS) provides
+ *  the source for the main clock at chip startup.
+ */
+#define __SYSTEM_CLOCK    (1000000)
+
+uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/
+
+/**
+ * Initialize the system
+ *
+ * @brief  Setup the microcontroller system.
+ *         Initialize the System and update the SystemCoreClock variable.
+ */
+void SystemInit(void)
+{
+	// Keep the default device state after reset
+	SystemCoreClock = __SYSTEM_CLOCK;
+	return;
+}
+
+/**
+ * Update SystemCoreClock variable
+ *
+ * @brief  Updates the SystemCoreClock with current core Clock
+ *         retrieved from cpu registers.
+ */
+void SystemCoreClockUpdate(void)
+{
+	// Not implemented
+	SystemCoreClock = __SYSTEM_CLOCK;
+	return;
+}
diff --git a/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.h b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.h
new file mode 100644
index 000000000..564f47f35
--- /dev/null
+++ b/atmel-samd/asf/sam0/utils/cmsis/samd21/source/system_samd21.h
@@ -0,0 +1,65 @@
+/**
+ * \file
+ *
+ * \brief Low-level initialization functions called upon chip startup
+ *
+ * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/*
+ * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+ */
+
+#ifndef _SYSTEM_SAMD21_H_INCLUDED_
+#define _SYSTEM_SAMD21_H_INCLUDED_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+extern uint32_t SystemCoreClock;   /*!< System Clock Frequency (Core Clock)  */
+
+void SystemInit(void);
+void SystemCoreClockUpdate(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SYSTEM_SAMD21_H_INCLUDED */