boot 0 -> app -> boot 1 跳转
芯片：LPC54608 J512
测试平台: EasyArm LPC54608
SDK: LPCXpresso54608-usart_polling 2.7.0
详细资料：请关注公众号《跳跃的影子》并发送“ lpc54608双boot跳转 ”获取。

核心代码

/* 
 *  跳转到指定的地址
 */
void boot_app_exec(const void *addr)
{
    const uint32_t *app_vectors;
    uint32_t app_sp;
    void (*app_entry)(void);

    app_vectors = (const uint32_t *)addr;
    app_sp      = app_vectors[0];
    app_entry   = (void (*)(void))app_vectors[1];

    /* disable all interrupt sources */
    NVIC->ICER[0] = 0xFFFFFFFF;
    NVIC->ICER[1] = 0xFFFFFFFF;

    /* clear all pending interrupts */
    NVIC->ICPR[0] = 0xFFFFFFFF;
    NVIC->ICPR[1] = 0xFFFFFFFF;

    /* diable sytick and clear interrupt */
    SysTick->CTRL = 0;
    SCB->ICSR |= SCB_ICSR_PENDSTCLR_Msk;

    /* set up vector table */
    SCB->VTOR = (uint32_t)app_vectors;

    /* set up stack pointer */
    __set_MSP(app_sp);
    __enable_irq();

    app_entry();
}