GD32F350 跳转IAP有读保护，看内存是没有安全防护的

只看该作者 · 2025-1-6 17:01

static void CheckIspMode(void)
{
// enable peripheral clock of RTC
RCU_REG_VAL(RCU_RTC) |= BIT(RCU_BIT_POS(RCU_RTC));

if(RTC_BKP0 == INTO_IAP)
{
      // enable peripheral clocks of RTC and PMU
      RCU_REG_VAL(RCU_PMU) |= BIT(RCU_BIT_POS(RCU_PMU));
      // enable backup domain write
      PMU_CTL |= PMU_CTL_BKPWEN;

      RTC_BKP0 = 0;

      __disable_irq();
      __set_PRIMASK(1);

      // 加个延时, 万一出现问题允许刚复位的时候SWD连接进来
      for (volatile int i = 0; i < 2000000; i++) {
         __NOP();
      }

      register void (*SysMemBootJump)(void);
      register uint32_t SysMemBootJumpAddr = *(uint32_t *)(0x1FFF0000 + 4);

      // 初始化堆栈指针
      __set_MSP(*(__IO uint32_t*)0x1FFF0000);

      SysMemBootJump = (void (*)(void))SysMemBootJumpAddr;
      // 跳转到系统存储器
      SysMemBootJump();

      while(1);
}
}