Support for STM32F103 Medium Density Performance Line

[yaqwsx]

When I remove all weak alisese, I am not able to compile, since GCC doesn't compile the code.

Here's the auto-generated startup code:

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/*
This file contains the entry point (Reset_Handler) of your firmware project.
The reset handled initializes the RAM and calls system library initializers as well as
the platform-specific initializer and the main() function.
*/

extern void *_estack;

#define NULL ((void *)0)

void Reset_Handler();
void Default_Handler();

#define BootRAM ((void *)0xF108F85F)

void NMI_Handler()                __attribute__ ((weak, alias ("Default_Handler")));
void HardFault_Handler()          __attribute__ ((weak, alias ("Default_Handler")));
void MemManage_Handler()          __attribute__ ((weak, alias ("Default_Handler")));
void BusFault_Handler()           __attribute__ ((weak, alias ("Default_Handler")));
void UsageFault_Handler()         __attribute__ ((weak, alias ("Default_Handler")));
void SVC_Handler()                __attribute__ ((weak, alias ("Default_Handler")));
void DebugMon_Handler()           __attribute__ ((weak, alias ("Default_Handler")));
void PendSV_Handler()             __attribute__ ((weak, alias ("Default_Handler")));
void SysTick_Handler()            __attribute__ ((weak, alias ("Default_Handler")));
void WWDG_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void PVD_IRQHandler()             __attribute__ ((weak, alias ("Default_Handler")));
void TAMPER_IRQHandler()          __attribute__ ((weak, alias ("Default_Handler")));
void RTC_IRQHandler()             __attribute__ ((weak, alias ("Default_Handler")));
void FLASH_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void RCC_IRQHandler()             __attribute__ ((weak, alias ("Default_Handler")));
void EXTI0_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void EXTI1_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void EXTI2_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void EXTI3_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void EXTI4_IRQHandler()           __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel1_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel2_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel3_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel4_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel5_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel6_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void DMA1_Channel7_IRQHandler()   __attribute__ ((weak, alias ("Default_Handler")));
void ADC1_2_IRQHandler()          __attribute__ ((weak, alias ("Default_Handler")));
void USB_HP_CAN1_TX_IRQHandler()  __attribute__ ((weak, alias ("Default_Handler")));
void USB_LP_CAN1_RX0_IRQHandler() __attribute__ ((weak, alias ("Default_Handler")));
void CAN1_RX1_IRQHandler()        __attribute__ ((weak, alias ("Default_Handler")));
void CAN1_SCE_IRQHandler()        __attribute__ ((weak, alias ("Default_Handler")));
void EXTI9_5_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void TIM1_BRK_IRQHandler()        __attribute__ ((weak, alias ("Default_Handler")));
void TIM1_UP_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void TIM1_TRG_COM_IRQHandler()    __attribute__ ((weak, alias ("Default_Handler")));
void TIM1_CC_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void TIM2_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void TIM3_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void TIM4_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void I2C1_EV_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void I2C1_ER_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void I2C2_EV_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void I2C2_ER_IRQHandler()         __attribute__ ((weak, alias ("Default_Handler")));
void SPI1_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void SPI2_IRQHandler()            __attribute__ ((weak, alias ("Default_Handler")));
void USART1_IRQHandler()          __attribute__ ((weak, alias ("Default_Handler")));
void USART2_IRQHandler()          __attribute__ ((weak, alias ("Default_Handler")));
void USART3_IRQHandler()          __attribute__ ((weak, alias ("Default_Handler")));
void EXTI15_10_IRQHandler()       __attribute__ ((weak, alias ("Default_Handler")));
void RTCAlarm_IRQHandler()        __attribute__ ((weak, alias ("Default_Handler")));
void USBWakeUp_IRQHandler()       __attribute__ ((weak, alias ("Default_Handler")));

void * g_pfnVectors[0x43] __attribute__ ((section (".isr_vector"))) =
{
&_estack,
&Reset_Handler,
&NMI_Handler,
&HardFault_Handler,
&MemManage_Handler,
&BusFault_Handler,
&UsageFault_Handler,
NULL,
NULL,
NULL,
NULL,
&SVC_Handler,
&DebugMon_Handler,
NULL,
&PendSV_Handler,
&SysTick_Handler,
&WWDG_IRQHandler,
&PVD_IRQHandler,
&TAMPER_IRQHandler,
&RTC_IRQHandler,
&FLASH_IRQHandler,
&RCC_IRQHandler,
&EXTI0_IRQHandler,
&EXTI1_IRQHandler,
&EXTI2_IRQHandler,
&EXTI3_IRQHandler,
&EXTI4_IRQHandler,
&DMA1_Channel1_IRQHandler,
&DMA1_Channel2_IRQHandler,
&DMA1_Channel3_IRQHandler,
&DMA1_Channel4_IRQHandler,
&DMA1_Channel5_IRQHandler,
&DMA1_Channel6_IRQHandler,
&DMA1_Channel7_IRQHandler,
&ADC1_2_IRQHandler,
&USB_HP_CAN1_TX_IRQHandler,
&USB_LP_CAN1_RX0_IRQHandler,
&CAN1_RX1_IRQHandler,
&CAN1_SCE_IRQHandler,
&EXTI9_5_IRQHandler,
&TIM1_BRK_IRQHandler,
&TIM1_UP_IRQHandler,
&TIM1_TRG_COM_IRQHandler,
&TIM1_CC_IRQHandler,
&TIM2_IRQHandler,
&TIM3_IRQHandler,
&TIM4_IRQHandler,
&I2C1_EV_IRQHandler,
&I2C1_ER_IRQHandler,
&I2C2_EV_IRQHandler,
&I2C2_ER_IRQHandler,
&SPI1_IRQHandler,
&SPI2_IRQHandler,
&USART1_IRQHandler,
&USART2_IRQHandler,
&USART3_IRQHandler,
&EXTI15_10_IRQHandler,
&RTCAlarm_IRQHandler,
&USBWakeUp_IRQHandler,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
BootRAM
};

void SystemInit();
void __libc_init_array();
void main();

extern void *_sidata, *_sdata, *_edata;
extern void *_sbss, *_ebss;

#include "stm32f10x.h"

void __attribute__((naked, noreturn)) Reset_Handler()
{
SCB->VTOR = (uint32_t)&g_pfnVectors;
//Normally the CPU should will setup the based on the value from the first entry in the vector table.
//If you encounter problems with accessing stack variables during initialization, ensure
//asm ("ldr sp, =_estack");

void **pSource, **pDest;
for (pSource = &_sidata, pDest = &_sdata; pDest != &_edata; pSource++, pDest++)
*pDest = *pSource;

for (pDest = &_sbss; pDest != &_ebss; pDest++)
*pDest = 0;

SystemInit();
__libc_init_array();
main();
for (;;) ;
}

void __attribute__((naked, noreturn)) Default_Handler()
{
//If we ended up here, an unexpected interrupt has happened (we did not defined the XXX_Handler function for it).
//See the definition of g_pfnVectors above for interrupt handler names.
for (;;) ;
}


[Andy Brown]

Code Select Expand


void SysTick_Handler()            __attribute__ ((weak, alias ("Default_Handler")));


The above line is the problem. Since we are providing SysTick_Handler as a weak symbol ourselves, can you change that line to:

Code Select Expand


extern void SysTick_Handler();


I'm concerned that it's auto-generated. Is it a one-off auto-generation when the project is created or is there some trigger that will cause any changes that you make to be overwritten?

[yaqwsx]

Thanks for clarification! The blink example now works as expected. Even the file is generated once (when the project is created), I would appreciate if the library provided a macro for optional weak symbols (something like DISABLE_WEAK_SYMBOLS). Do you think it would be possible to add it to the library?

I was also struggling with the SGI extension in form of slist. With the compiler on windows, I had to change includes in event.h to "#include "ext/slist"" and I also had to change namespace from std to __gnu_cxx. I have never worked with this extension before - is there a compiler flag which enables them or is this a "feature" of the compiler?

Thanks for your help.