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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_Atmel/TARGET_SAM21/TARGET_SAMR21G18A/TOOLCHAIN_GCC_ARM/startup_samr21.c@579:53297373a894, 2015-07-01 (annotated)

Committer:
mbed_official
Date:
Wed Jul 01 09:45:11 2015 +0100
Revision:
579:53297373a894
Child:
592:a274ee790e56
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081



Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/



Initial version of drivers for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 579:53297373a894 1 /**
mbed_official 579:53297373a894 2 * \file
mbed_official 579:53297373a894 3 *
mbed_official 579:53297373a894 4 * \brief gcc starttup file for SAMR21
mbed_official 579:53297373a894 5 *
mbed_official 579:53297373a894 6 * Copyright (c) 2014 Atmel Corporation. All rights reserved.
mbed_official 579:53297373a894 7 *
mbed_official 579:53297373a894 8 * \asf_license_start
mbed_official 579:53297373a894 9 *
mbed_official 579:53297373a894 10 * \page License
mbed_official 579:53297373a894 11 *
mbed_official 579:53297373a894 12 * Redistribution and use in source and binary forms, with or without
mbed_official 579:53297373a894 13 * modification, are permitted provided that the following conditions are met:
mbed_official 579:53297373a894 14 *
mbed_official 579:53297373a894 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 579:53297373a894 16 * this list of conditions and the following disclaimer.
mbed_official 579:53297373a894 17 *
mbed_official 579:53297373a894 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 579:53297373a894 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 579:53297373a894 20 * and/or other materials provided with the distribution.
mbed_official 579:53297373a894 21 *
mbed_official 579:53297373a894 22 * 3. The name of Atmel may not be used to endorse or promote products derived
mbed_official 579:53297373a894 23 * from this software without specific prior written permission.
mbed_official 579:53297373a894 24 *
mbed_official 579:53297373a894 25 * 4. This software may only be redistributed and used in connection with an
mbed_official 579:53297373a894 26 * Atmel microcontroller product.
mbed_official 579:53297373a894 27 *
mbed_official 579:53297373a894 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
mbed_official 579:53297373a894 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 579:53297373a894 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
mbed_official 579:53297373a894 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
mbed_official 579:53297373a894 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 579:53297373a894 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
mbed_official 579:53297373a894 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
mbed_official 579:53297373a894 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
mbed_official 579:53297373a894 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
mbed_official 579:53297373a894 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 579:53297373a894 38 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 579:53297373a894 39 *
mbed_official 579:53297373a894 40 * \asf_license_stop
mbed_official 579:53297373a894 41 *
mbed_official 579:53297373a894 42 */
mbed_official 579:53297373a894 43 /**
mbed_official 579:53297373a894 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
mbed_official 579:53297373a894 45 */
mbed_official 579:53297373a894 46
mbed_official 579:53297373a894 47 #include "samr21g18a.h"
mbed_official 579:53297373a894 48
mbed_official 579:53297373a894 49 /* Initialize segments */
mbed_official 579:53297373a894 50 extern uint32_t _sfixed;
mbed_official 579:53297373a894 51 extern uint32_t _efixed;
mbed_official 579:53297373a894 52 extern uint32_t _etext;
mbed_official 579:53297373a894 53 extern uint32_t _srelocate;
mbed_official 579:53297373a894 54 extern uint32_t _erelocate;
mbed_official 579:53297373a894 55 extern uint32_t _szero;
mbed_official 579:53297373a894 56 extern uint32_t _ezero;
mbed_official 579:53297373a894 57 extern uint32_t _sstack;
mbed_official 579:53297373a894 58 extern uint32_t _estack;
mbed_official 579:53297373a894 59
mbed_official 579:53297373a894 60 /** \cond DOXYGEN_SHOULD_SKIP_THIS */
mbed_official 579:53297373a894 61 int main(void);
mbed_official 579:53297373a894 62 /** \endcond */
mbed_official 579:53297373a894 63
mbed_official 579:53297373a894 64 void __libc_init_array(void);
mbed_official 579:53297373a894 65
mbed_official 579:53297373a894 66 /* Default empty handler */
mbed_official 579:53297373a894 67 void Dummy_Handler(void);
mbed_official 579:53297373a894 68
mbed_official 579:53297373a894 69 /* Cortex-M0+ core handlers */
mbed_official 579:53297373a894 70 void NMI_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 71 void HardFault_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 72 void SVC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 73 void PendSV_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 74 void SysTick_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 75
mbed_official 579:53297373a894 76 /* Peripherals handlers */
mbed_official 579:53297373a894 77 void PM_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 78 void SYSCTRL_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 79 void WDT_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 80 void RTC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 81 void EIC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 82 void NVMCTRL_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 83 void DMAC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 84 #ifdef USB_IRQn
mbed_official 579:53297373a894 85 void USB_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 86 #endif
mbed_official 579:53297373a894 87 void EVSYS_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 88 void SERCOM0_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 89 void SERCOM1_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 90 void SERCOM2_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 91 void SERCOM3_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 92 #ifdef SERCOM4_IRQn
mbed_official 579:53297373a894 93 void SERCOM4_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 94 #endif
mbed_official 579:53297373a894 95 #ifdef SERCOM5_IRQn
mbed_official 579:53297373a894 96 void SERCOM5_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 97 #endif
mbed_official 579:53297373a894 98 void TCC0_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 99 void TCC1_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 100 void TCC2_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 101 void TC3_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 102 void TC4_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 103 void TC5_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 104 #ifdef TC6_IRQn
mbed_official 579:53297373a894 105 void TC6_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 106 #endif
mbed_official 579:53297373a894 107 #ifdef TC7_IRQn
mbed_official 579:53297373a894 108 void TC7_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 109 #endif
mbed_official 579:53297373a894 110 #ifdef ADC_IRQn
mbed_official 579:53297373a894 111 void ADC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 112 #endif
mbed_official 579:53297373a894 113 #ifdef AC_IRQn
mbed_official 579:53297373a894 114 void AC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 115 #endif
mbed_official 579:53297373a894 116 #ifdef DAC_IRQn
mbed_official 579:53297373a894 117 void DAC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 118 #endif
mbed_official 579:53297373a894 119 #ifdef PTC_IRQn
mbed_official 579:53297373a894 120 void PTC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 121 #endif
mbed_official 579:53297373a894 122 void I2S_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
mbed_official 579:53297373a894 123
mbed_official 579:53297373a894 124 /* Exception Table */
mbed_official 579:53297373a894 125 __attribute__ ((section(".vectors")))
mbed_official 579:53297373a894 126 const DeviceVectors exception_table = {
mbed_official 579:53297373a894 127
mbed_official 579:53297373a894 128 /* Configure Initial Stack Pointer, using linker-generated symbols */
mbed_official 579:53297373a894 129 (void*) (&_estack),
mbed_official 579:53297373a894 130
mbed_official 579:53297373a894 131 (void*) Reset_Handler,
mbed_official 579:53297373a894 132 (void*) NMI_Handler,
mbed_official 579:53297373a894 133 (void*) HardFault_Handler,
mbed_official 579:53297373a894 134 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 135 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 136 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 137 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 138 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 139 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 140 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 141 (void*) SVC_Handler,
mbed_official 579:53297373a894 142 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 143 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 144 (void*) PendSV_Handler,
mbed_official 579:53297373a894 145 (void*) SysTick_Handler,
mbed_official 579:53297373a894 146
mbed_official 579:53297373a894 147 /* Configurable interrupts */
mbed_official 579:53297373a894 148 (void*) PM_Handler, /* 0 Power Manager */
mbed_official 579:53297373a894 149 (void*) SYSCTRL_Handler, /* 1 System Control */
mbed_official 579:53297373a894 150 (void*) WDT_Handler, /* 2 Watchdog Timer */
mbed_official 579:53297373a894 151 (void*) RTC_Handler, /* 3 Real-Time Counter */
mbed_official 579:53297373a894 152 (void*) EIC_Handler, /* 4 External Interrupt Controller */
mbed_official 579:53297373a894 153 (void*) NVMCTRL_Handler, /* 5 Non-Volatile Memory Controller */
mbed_official 579:53297373a894 154 (void*) DMAC_Handler, /* 6 Direct Memory Access Controller */
mbed_official 579:53297373a894 155 #ifdef USB_IRQn
mbed_official 579:53297373a894 156 (void*) USB_Handler, /* 7 Universal Serial Bus */
mbed_official 579:53297373a894 157 #else
mbed_official 579:53297373a894 158 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 159 #endif
mbed_official 579:53297373a894 160 (void*) EVSYS_Handler, /* 8 Event System Interface */
mbed_official 579:53297373a894 161 (void*) SERCOM0_Handler, /* 9 Serial Communication Interface 0 */
mbed_official 579:53297373a894 162 (void*) SERCOM1_Handler, /* 10 Serial Communication Interface 1 */
mbed_official 579:53297373a894 163 (void*) SERCOM2_Handler, /* 11 Serial Communication Interface 2 */
mbed_official 579:53297373a894 164 (void*) SERCOM3_Handler, /* 12 Serial Communication Interface 3 */
mbed_official 579:53297373a894 165 #ifdef SERCOM4_IRQn
mbed_official 579:53297373a894 166 (void*) SERCOM4_Handler, /* 13 Serial Communication Interface 4 */
mbed_official 579:53297373a894 167 #else
mbed_official 579:53297373a894 168 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 169 #endif
mbed_official 579:53297373a894 170 #ifdef SERCOM5_IRQn
mbed_official 579:53297373a894 171 (void*) SERCOM5_Handler, /* 14 Serial Communication Interface 5 */
mbed_official 579:53297373a894 172 #else
mbed_official 579:53297373a894 173 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 174 #endif
mbed_official 579:53297373a894 175 (void*) TCC0_Handler, /* 15 Timer Counter Control 0 */
mbed_official 579:53297373a894 176 (void*) TCC1_Handler, /* 16 Timer Counter Control 1 */
mbed_official 579:53297373a894 177 (void*) TCC2_Handler, /* 17 Timer Counter Control 2 */
mbed_official 579:53297373a894 178 (void*) TC3_Handler, /* 18 Basic Timer Counter 0 */
mbed_official 579:53297373a894 179 (void*) TC4_Handler, /* 19 Basic Timer Counter 1 */
mbed_official 579:53297373a894 180 (void*) TC5_Handler, /* 20 Basic Timer Counter 2 */
mbed_official 579:53297373a894 181 #ifdef TC6_IRQn
mbed_official 579:53297373a894 182 (void*) TC6_Handler, /* 21 Basic Timer Counter 3 */
mbed_official 579:53297373a894 183 #else
mbed_official 579:53297373a894 184 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 185 #endif
mbed_official 579:53297373a894 186 #ifdef TC7_IRQn
mbed_official 579:53297373a894 187 (void*) TC7_Handler, /* 22 Basic Timer Counter 4 */
mbed_official 579:53297373a894 188 #else
mbed_official 579:53297373a894 189 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 190 #endif
mbed_official 579:53297373a894 191 #ifdef ADC_IRQn
mbed_official 579:53297373a894 192 (void*) ADC_Handler, /* 23 Analog Digital Converter */
mbed_official 579:53297373a894 193 #else
mbed_official 579:53297373a894 194 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 195 #endif
mbed_official 579:53297373a894 196 #ifdef AC_IRQn
mbed_official 579:53297373a894 197 (void*) AC_Handler, /* 24 Analog Comparators */
mbed_official 579:53297373a894 198 #else
mbed_official 579:53297373a894 199 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 200 #endif
mbed_official 579:53297373a894 201 #ifdef DAC_IRQn
mbed_official 579:53297373a894 202 (void*) DAC_Handler, /* 25 Digital Analog Converter */
mbed_official 579:53297373a894 203 #else
mbed_official 579:53297373a894 204 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 205 #endif
mbed_official 579:53297373a894 206 #ifdef PTC_IRQn
mbed_official 579:53297373a894 207 (void*) PTC_Handler, /* 26 Peripheral Touch Controller */
mbed_official 579:53297373a894 208 #else
mbed_official 579:53297373a894 209 (void*) (0UL), /* Reserved */
mbed_official 579:53297373a894 210 #endif
mbed_official 579:53297373a894 211 (void*) I2S_Handler /* 27 Inter-IC Sound Interface */
mbed_official 579:53297373a894 212 };
mbed_official 579:53297373a894 213
mbed_official 579:53297373a894 214 /**
mbed_official 579:53297373a894 215 * \brief This is the code that gets called on processor reset.
mbed_official 579:53297373a894 216 * To initialize the device, and call the main() routine.
mbed_official 579:53297373a894 217 */
mbed_official 579:53297373a894 218 void Reset_Handler(void)
mbed_official 579:53297373a894 219 {
mbed_official 579:53297373a894 220 uint32_t *pSrc, *pDest;
mbed_official 579:53297373a894 221
mbed_official 579:53297373a894 222 /* Initialize the relocate segment */
mbed_official 579:53297373a894 223 pSrc = &_etext;
mbed_official 579:53297373a894 224 pDest = &_srelocate;
mbed_official 579:53297373a894 225
mbed_official 579:53297373a894 226 if (pSrc != pDest) {
mbed_official 579:53297373a894 227 for (; pDest < &_erelocate;) {
mbed_official 579:53297373a894 228 *pDest++ = *pSrc++;
mbed_official 579:53297373a894 229 }
mbed_official 579:53297373a894 230 }
mbed_official 579:53297373a894 231
mbed_official 579:53297373a894 232 /* Clear the zero segment */
mbed_official 579:53297373a894 233 for (pDest = &_szero; pDest < &_ezero;) {
mbed_official 579:53297373a894 234 *pDest++ = 0;
mbed_official 579:53297373a894 235 }
mbed_official 579:53297373a894 236
mbed_official 579:53297373a894 237 /* Set the vector table base address */
mbed_official 579:53297373a894 238 pSrc = (uint32_t *) & _sfixed;
mbed_official 579:53297373a894 239 SCB->VTOR = ((uint32_t) pSrc & SCB_VTOR_TBLOFF_Msk);
mbed_official 579:53297373a894 240
mbed_official 579:53297373a894 241 /* Initialize the C library */
mbed_official 579:53297373a894 242 __libc_init_array();
mbed_official 579:53297373a894 243
mbed_official 579:53297373a894 244 /* Branch to main function */
mbed_official 579:53297373a894 245 main();
mbed_official 579:53297373a894 246
mbed_official 579:53297373a894 247 /* Infinite loop */
mbed_official 579:53297373a894 248 while (1);
mbed_official 579:53297373a894 249 }
mbed_official 579:53297373a894 250
mbed_official 579:53297373a894 251 /**
mbed_official 579:53297373a894 252 * \brief Default interrupt handler for unused IRQs.
mbed_official 579:53297373a894 253 */
mbed_official 579:53297373a894 254 void Dummy_Handler(void)
mbed_official 579:53297373a894 255 {
mbed_official 579:53297373a894 256 while (1) {
mbed_official 579:53297373a894 257 }
mbed_official 579:53297373a894 258 }