/** * \file * * \brief gcc startup file for SAMD21 * * Copyright (c) 2016-2018 Microchip Technology Inc. and its subsidiaries. * * \asf_license_start * * \page License * * Subject to your compliance with these terms, you may use Microchip * software and any derivatives exclusively with Microchip products. * It is your responsibility to comply with third party license terms applicable * to your use of third party software (including open source software) that * may accompany Microchip software. * * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. * * \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 #ifdef ID_TCC3 void TCC3_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 #ifdef ID_TCC3 .pfnTCC3_Handler = (void*) TCC3_Handler /* 29 Timer Counter Control 3 */ #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) { } }