c - Start bootloader from firmware -


i wish able start bootloader directly code without having have pin high , reset microcontroller access it. idea below bootloader binary stored in char array. when start_bootloader() called, bootloader copied sram , executed.

however, code copies ram when attempts execute code @ location have copied to, nothing.

the micro. energy micro efm32380f1024. code below using based on energy micro's application note an0042.

void start_bootloader(void) {   /* diable interrupts */   int_disable();    __set_msp( ( 0x20000000 + sizeof( bootloader ) + 0x400 ) & 0xfffffff0 );    /* load entire bootloader sram. */    memcpy( (void*)0x20000000, bootloader, sizeof( bootloader ) );    /* start executing bootloader. */    boot_jump( *(uint32_t*)0x20000000, *(uint32_t*)0x20000004 ); }

the code ships rom , ram linker settings - ram version work in case. try read second word (32 bit little endian) binary - should point odd address in 0x20000000 range, new pc value.


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