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214 lines
11 KiB
C
214 lines
11 KiB
C
6 months ago
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/* File: startup_stm32c031xx.c for GNU-ARM
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* Purpose: startup file for STM32C031xx Cortex-M0+ device.
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* Should be used with GCC 'GNU Tools ARM Embedded'
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* Version: CMSIS 5.0.1
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* Date: 2017-09-13
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*
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* Modified by Quantum Leaps:
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* - Added relocating of the Vector Table to free up the 256B region at 0x0
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* for NULL-pointer protection by the MPU.
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* - Modified all exception handlers to branch to assert_failed()
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* instead of locking up the CPU inside an endless loop.
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*
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* Created from the CMSIS template for the specified device
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* Quantum Leaps, www.state-machine.com
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*
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* NOTE:
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* The function assert_failed defined at the end of this file defines
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* the error/assertion handling policy for the application and might
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* need to be customized for each project. This function is defined in
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* assembly to re-set the stack pointer, in case it is corrupted by the
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* time assert_failed is called.
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*/
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/* start and end of stack defined in the linker script ---------------------*/
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/*extern int __stack_start__;*/
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extern int __stack_end__;
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/* Weak prototypes for error handlers --------------------------------------*/
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/**
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* \note
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* The function assert_failed defined at the end of this file defines
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* the error/assertion handling policy for the application and might
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* need to be customized for each project. This function is defined in
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* assembly to avoid accessing the stack, which might be corrupted by
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* the time assert_failed is called.
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*/
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__attribute__ ((naked, noreturn))
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void assert_failed(char const *module, int loc);
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/* Function prototypes -----------------------------------------------------*/
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void Default_Handler(void); /* Default empty handler */
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void Reset_Handler(void); /* Reset Handler */
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void SystemInit(void); /* CMSIS system initialization */
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/*----------------------------------------------------------------------------
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* weak aliases for each Exception handler to the Default_Handler.
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* Any function with the same name will override these definitions.
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*/
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/* Cortex-M Processor fault exceptions... */
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void NMI_Handler (void) __attribute__ ((weak));
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void HardFault_Handler (void) __attribute__ ((weak));
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void MemManage_Handler (void) __attribute__ ((weak));
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void BusFault_Handler (void) __attribute__ ((weak));
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void UsageFault_Handler (void) __attribute__ ((weak));
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/* Cortex-M Processor non-fault exceptions... */
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void SVC_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
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void DebugMon_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
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void PendSV_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
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void SysTick_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
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/* external interrupts... */
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void WWDG_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void RTC_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void FLASH_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void RCC_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void EXTI0_1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void EXTI2_3_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void EXTI4_15_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved8_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void DMA1_Channel1_IRQHandler(void) __attribute__ ((weak, alias("Default_Handler")));
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void DMA1_Channel2_3_IRQHandler(void) __attribute__ ((weak, alias("Default_Handler")));
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void DMAMUX1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void ADC1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM1_BRK_UP_TRG_COM_IRQHandler(void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM1_CC_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved15_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM3_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved17_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved18_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM14_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved20_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM16_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void TIM17_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void I2C1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved24_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void SPI1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved26_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void USART1_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void USART2_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved29_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved30_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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void Reserved31_IRQHandler (void) __attribute__ ((weak, alias("Default_Handler")));
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/*..........................................................................*/
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__attribute__ ((section(".isr_vector")))
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int const g_pfnVectors[] = {
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(int)&__stack_end__, /* Top of Stack */
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(int)&Reset_Handler, /* Reset Handler */
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(int)&NMI_Handler, /* NMI Handler */
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(int)&HardFault_Handler, /* Hard Fault Handler */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&Default_Handler, /* Reserved */
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(int)&SVC_Handler, /* SVCall handler */
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(int)&DebugMon_Handler, /* Debug monitor handler */
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(int)&Default_Handler, /* Reserved */
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(int)&PendSV_Handler, /* The PendSV handler */
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(int)&SysTick_Handler, /* The SysTick handler */
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/*IRQ handlers... */
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(int)&WWDG_IRQHandler, /* [ 0] Window Watchdog */
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(int)&Reserved1_IRQHandler, /* [ 1] Reserved */
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(int)&RTC_IRQHandler, /* [ 2] RTC through EXTI Line */
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(int)&FLASH_IRQHandler, /* [ 3] FLASH */
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(int)&RCC_IRQHandler, /* [ 4] RCC */
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(int)&EXTI0_1_IRQHandler, /* [ 5] EXTI Line 0 and 1 */
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(int)&EXTI2_3_IRQHandler, /* [ 6] EXTI Line 2 and 3 */
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(int)&EXTI4_15_IRQHandler, /* [ 7] EXTI Line 4 to 15 */
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(int)&Reserved8_IRQHandler, /* [ 8] Reserved */
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(int)&DMA1_Channel1_IRQHandler,/* [ 9] DMA1 Channel 1 */
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(int)&DMA1_Channel2_3_IRQHandler,/* [10] DMA1 Channel 2 and Channel 3 */
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(int)&DMAMUX1_IRQHandler, /* [11] DMAMUX */
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(int)&ADC1_IRQHandler, /* [12] ADC1 */
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(int)&TIM1_BRK_UP_TRG_COM_IRQHandler,/* [13] TIM1 Break,Update,Trigger & Comm */
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(int)&TIM1_CC_IRQHandler, /* [14] TIM1 Capture Compare */
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(int)&Reserved15_IRQHandler, /* [15] Reserved */
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(int)&TIM3_IRQHandler, /* [16] TIM3 */
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(int)&Reserved17_IRQHandler, /* [17] Reserved */
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(int)&Reserved18_IRQHandler, /* [18] Reserved */
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(int)&TIM14_IRQHandler, /* [19] TIM14 */
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(int)&Reserved20_IRQHandler, /* [20] Reserved */
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(int)&TIM16_IRQHandler, /* [21] TIM16 */
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(int)&TIM17_IRQHandler, /* [22] TIM17 */
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(int)&I2C1_IRQHandler, /* [23] I2C1 */
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(int)&Reserved24_IRQHandler, /* [24] Reserved */
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(int)&SPI1_IRQHandler, /* [25] SPI1 */
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(int)&Reserved26_IRQHandler, /* [26] Reserved */
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(int)&USART1_IRQHandler, /* [27] USART1 */
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(int)&USART2_IRQHandler, /* [28] USART2 */
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(int)&Reserved29_IRQHandler, /* [29] Reserved */
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(int)&Reserved30_IRQHandler, /* [30] Reserved */
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(int)&Reserved31_IRQHandler, /* [31] Reserved */
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};
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/* reset handler -----------------------------------------------------------*/
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__attribute__((naked)) void Reset_Handler(void);
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void Reset_Handler(void) {
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extern int main(void);
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extern int __libc_init_array(void);
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extern unsigned __data_start; /* start of .data in the linker script */
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extern unsigned __data_end__; /* end of .data in the linker script */
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extern unsigned const __data_load; /* initialization values for .data */
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extern unsigned __bss_start__; /* start of .bss in the linker script */
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extern unsigned __bss_end__; /* end of .bss in the linker script */
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extern void software_init_hook(void) __attribute__((weak));
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SystemInit(); /* CMSIS system initialization */
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/* copy the data segment initializers from flash to RAM... */
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unsigned const *src = &__data_load;
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unsigned *dst;
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for (dst = &__data_start; dst < &__data_end__; ++dst, ++src) {
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*dst = *src;
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}
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/* zero fill the .bss segment in RAM... */
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for (dst = &__bss_start__; dst < &__bss_end__; ++dst) {
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*dst = 0;
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}
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/* init hook provided? */
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if (&software_init_hook != (void (*)(void))(0)) {
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/* give control to the RTOS */
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software_init_hook(); /* this will also call __libc_init_array */
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}
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else {
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/* call all static constructors in C++ (harmless in C programs) */
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__libc_init_array();
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(void)main(); /* application's entry point; should never return! */
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}
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/* the previous code should not return, but assert just in case... */
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__asm volatile (" CPSID i");
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assert_failed("Reset_Handler", 1U);
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}
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/* fault exception handlers ------------------------------------------------*/
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__attribute__((naked)) void NMI_Handler(void);
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void NMI_Handler(void) {
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/* disable interrupts and reset SP in case of stack overflow */
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__asm volatile (" CPSID i\n MOV sp,%0" : : "r" (&__stack_end__));
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assert_failed("NMI", 1U);
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}
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/*..........................................................................*/
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__attribute__((naked)) void HardFault_Handler(void);
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void HardFault_Handler(void) {
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/* disable interrupts and reset SP in case of stack overflow */
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__asm volatile (" CPSID i\n MOV sp,%0" : : "r" (&__stack_end__));
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assert_failed("HardFault", 1U);
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}
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/*..........................................................................*/
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__attribute__((naked)) void Default_Handler(void);
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void Default_Handler(void) {
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/* disable interrupts and reset SP in case of stack overflow */
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__asm volatile (" CPSID i\n MOV sp,%0" : : "r" (&__stack_end__));
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assert_failed("Default", 1U);
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}
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