/* * Copyright (C) 2014 Freie Universität Berlin * * This file is subject to the terms and conditions of the GNU Lesser General * Public License v2.1. See the file LICENSE in the top level directory for more * details. */ /** * @ingroup cpu_stm32f0 * @{ * * @file * @brief Startup code and interrupt vector definition * * @author Hauke Petersen * * @} */ #include #include "panic.h" /** * memory markers as defined in the linker script */ 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; /** * @brief functions for initializing the board, std-lib and kernel */ extern void board_init(void); extern void kernel_init(void); extern void __libc_init_array(void); /** * @brief This function is the entry point after a system reset * * After a system reset, the following steps are necessary and carried out: * 1. load data section from flash to ram * 2. overwrite uninitialized data section (BSS) with zeros * 3. initialize the newlib * 4. initialize the board (sync clock, setup std-IO) * 5. initialize and start RIOTs kernel */ void reset_handler(void) { uint32_t *dst; uint32_t *src = &_etext; /* load data section from flash to ram */ for (dst = &_srelocate; dst < &_erelocate; ) { *(dst++) = *(src++); } /* default bss section to zero */ for (dst = &_szero; dst < &_ezero; ) { *(dst++) = 0; } /* initialize the board and startup the kernel */ board_init(); /* initialize std-c library (this should be done after board_init) */ __libc_init_array(); /* startup the kernel */ kernel_init(); } /** * @brief Default handler is called in case no interrupt handler was defined */ void dummy_handler(void) { core_panic(DUMMY_HANDLER, "DUMMY HANDLER"); } void isr_nmi(void) { core_panic(NMI_HANDLER, "NMI HANDLER"); } void isr_hard_fault(void) { core_panic(HARD_FAULT, "HARD FAULT"); } /* Cortex-M specific interrupt vectors */ void isr_svc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pendsv(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_systick(void) __attribute__ ((weak, alias("dummy_handler"))); /* STM32F051R8 specific interrupt vector */ void isr_wwdg(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pvd(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_flash(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rcc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_exti0_1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_exti2_3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_exti4_15(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ts(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dma1_ch1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dma1_ch2_3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dma1_ch4_5(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_adc1_comp(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim1_brk_up_trg_com(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim1_cc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim6_dac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim7(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim14(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim15(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim16(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tim17(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_i2c1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_i2c2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_spi1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_spi2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart3_8(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_cec(void) __attribute__ ((weak, alias("dummy_handler"))); /* interrupt vector table */ __attribute__ ((section(".vectors"))) const void *interrupt_vector[] = { /* Stack pointer */ (void*) (&_estack), /* pointer to the top of the empty stack */ /* Cortex-M handlers */ (void*) reset_handler, /* entry point of the program */ (void*) isr_nmi, /* non maskable interrupt handler */ (void*) isr_hard_fault, /* if you end up here its not good */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) isr_svc, /* system call interrupt */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) isr_pendsv, /* pendSV interrupt, used for task switching in RIOT */ (void*) isr_systick, /* SysTick interrupt, not used in RIOT */ /* STM specific peripheral handlers */ (void*) isr_wwdg, /* windowed watchdog */ (void*) isr_pvd, /* power control */ (void*) isr_rtc, /* real time clock */ (void*) isr_flash, /* flash memory controller */ (void*) isr_rcc, /* reset and clock control */ (void*) isr_exti0_1, /* external interrupt lines 0 and 1 */ (void*) isr_exti2_3, /* external interrupt lines 2 and 3 */ (void*) isr_exti4_15, /* external interrupt lines 4 to 15 */ (void*) isr_ts, /* touch sensing input*/ (void*) isr_dma1_ch1, /* direct memory access controller 1, channel 1*/ (void*) isr_dma1_ch2_3, /* direct memory access controller 1, channel 2 and 3*/ (void*) isr_dma1_ch4_5, /* direct memory access controller 1, channel 4 and 5*/ (void*) isr_adc1_comp, /* analog digital converter */ (void*) isr_tim1_brk_up_trg_com, /* timer 1 break, update, trigger and communication */ (void*) isr_tim1_cc, /* timer 1 capture compare */ (void*) isr_tim2, /* timer 2 */ (void*) isr_tim3, /* timer 3 */ (void*) isr_tim6_dac, /* timer 6 and digital to analog converter */ (void*) isr_tim7, /* timer 7 */ (void*) isr_tim14, /* timer 14 */ (void*) isr_tim15, /* timer 15 */ (void*) isr_tim16, /* timer 16 */ (void*) isr_tim17, /* timer 17 */ (void*) isr_i2c1, /* I2C 1 */ (void*) isr_i2c2, /* I2C 2 */ (void*) isr_spi1, /* SPI 1 */ (void*) isr_spi2, /* SPI 2 */ (void*) isr_usart1, /* USART 1 */ (void*) isr_usart2, /* USART 2 */ (void*) isr_usart3_8, /* USART 3 to 8 */ (void*) isr_cec, /* consumer electronics control */ (void*) (0UL) /* reserved */ };