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Add hold in bootloader using bkp register 10

This commit is contained in:
Roger Clark 2018-04-22 14:31:56 +10:00
parent 4bb4ce913b
commit 5664dbc7aa
1 changed files with 6 additions and 1 deletions
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7
STM32F1/cores/maple/usb_serial.cpp
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@ -37,7 +37,7 @@
#include <libmaple/usb_cdcacm.h>
#include <libmaple/usb.h>
#include <libmaple/iwdg.h>
#include <libmaple/bkp.h>
#include "wirish.h"
/*
@ -322,6 +322,11 @@ static void rxHook(unsigned hook __attribute__((unused)), void *ignored __attrib
#ifdef SERIAL_USB
// Got the magic sequence -> reset, presumably into the bootloader.
// Return address is wait_reset, but we must set the thumb bit.
bkp_init();
bkp_enable_writes();
bkp_write(10, 0x424C);
bkp_disable_writes();
uintptr_t target = (uintptr_t)wait_reset | 0x1;
asm volatile("mov r0, %[stack_top] \n\t" // Reset stack
"mov sp, r0 \n\t"