/* * 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_nrf51822 * @{ * * @file startup.c * @brief Startup code and interrupt vector definition * * @author Hauke Petersen * * @} */ #include #include "board.h" #include "cpu.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; /* make sure all RAM blocks are turned on * -> see NRF51822 Product Anomaly Notice (PAN) #16 for more details */ NRF_POWER->RAMON = 0xf; /* 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) { while (1) {asm ("nop");} } void isr_nmi(void) { while (1) {asm ("nop");} } void isr_hard_fault(void) { while (1) { for (int i = 0; i < 500000; i++) { asm("nop"); } LED_RED_TOGGLE; } } /* 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"))); /* nRF51822qfaa specific interrupt vector */ void isr_power_clock(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_radio(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_uart0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_spi0_twi0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_spi1_twi1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_gpiote(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_adc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_timer0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_timer1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_timer2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtc0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_temp(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rng(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ecb(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ccm_aar(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_wdt(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtc1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_qdec(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_lpcomp(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi4(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_swi5(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 */ /* nRF51 specific peripheral handlers */ (void*) isr_power_clock, /* power_clock */ (void*) isr_radio, /* radio */ (void*) isr_uart0, /* uart0 */ (void*) isr_spi0_twi0, /* spi0_twi0 */ (void*) isr_spi1_twi1, /* spi1_twi1 */ (void*) (0UL), /* reserved */ (void*) isr_gpiote, /* gpiote */ (void*) isr_adc, /* adc */ (void*) isr_timer0, /* timer0 */ (void*) isr_timer1, /* timer1 */ (void*) isr_timer2, /* timer2 */ (void*) isr_rtc0, /* rtc0 */ (void*) isr_temp, /* temp */ (void*) isr_rng, /* rng */ (void*) isr_ecb, /* ecb */ (void*) isr_ccm_aar, /* ccm_aar */ (void*) isr_wdt, /* wdt */ (void*) isr_rtc1, /* rtc1 */ (void*) isr_qdec, /* qdec */ (void*) isr_lpcomp, /* lpcomp */ (void*) isr_swi0, /* swi0 */ (void*) isr_swi1, /* swi1 */ (void*) isr_swi2, /* swi2 */ (void*) isr_swi3, /* swi3 */ (void*) isr_swi4, /* swi4 */ (void*) isr_swi5, /* swi5 */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ (void*) (0UL), /* reserved */ };