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1. 

   JoshSanders
   Member

   Hi Leafers

   I was trying to find a simple command to soft-reset Maple.
   After some digging, I found a STM32 library called core_cm3.h with the following command:

   /** \brief System Reset
   The function initiates a system reset request to reset the MCU.
   */
   __STATIC_INLINE void NVIC_SystemReset(void)
   {
   (Function code)
   }

   it's located here:
   http://code.google.com/p/stm32lib/source/browse/Libraries/CMSIS/CM3/CoreSupport/core_cm3.h?r=887cedeb263237b453b66ab14dee02f4638a6d15

   I'm working on an open source project, and it would complicate things for my users if they had to download this library in order to upload my sketch - is there a simpler way to accomplish what I'm trying to do from within Maple's framework? I noticed limited NVIC support in libmaple, but no reference to a reset function...

   Thanks,
   Josh

   Posted 1 year ago #
2. 

   ventosus
   Member

   'nvic_sys_reset' forces a reset of the maple and is the libmaple equivalent to 'NVIC_SystemReset'.
   https://github.com/leaflabs/libmaple/blob/master/libmaple/nvic.c

   libmaple triggers the latter to get into boot loader mode after receiving a magic sequence via USB.
   https://github.com/leaflabs/libmaple/blob/master/wirish/usb_serial.cpp

   Posted 1 year ago #
3. 

   JoshSanders
   Member

   Thanks, Ventosus!

   Also, I missed a post with a different reset solution that works beautifully:
   http://forums.leaflabs.com/topic.php?id=16585#post-32097

   For convenience the answer is:

   #define SCB_AIRCR ((volatile uint32*) (0xE000ED00 + 0x0C))
   #define SCB_AIRCR_SYSRESETREQ (1 << 2)
   #define SCB_AIRCR_RESET ((0x05FA0000) | SCB_AIRCR_SYSRESETREQ)

   void setup() {
   }

   void loop () {
   if (you want to hard-reset) {
   *(SCB_AIRCR) = SCB_AIRCR_RESET;
   }
   }

   Posted 1 year ago #

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