STM32L4R5ZIT6软件跳转ISP运行Hardfault问题

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yklstudent 发布时间：2019-11-14 14:08

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最近研究ST芯片的内容ISP升级方法，按照官方推荐方式，需要设置BOOT引脚电平进入内容System Bootloader升级，感觉这种方式麻烦，所以查找是否可以软件方式直接跳转ISP进行升级；经过百度和各论坛查找资料，终于找到解决办法，并且经过验证大部分是可行的，少部分不行(暂时还没有搞清楚原因)
以下是软件跳转内容ISP的代码，可以直接调用即可：
/**
* Function to perform jump to system memory boot from user application
*
* Call function when you want to jump to system memory
*/
void JumpToBootloader(void) {
void (*SysMemBootJump)(void);

/**
   * Step: Set system memory address.
   *
   *    For STM32F429, system memory is on 0x1FFF 0000
   *    For other families, check AN2606 document table 110 with descriptions of memory addresses
   */
//volatile uint32_t addr = 0x1FFF0000;
/**
   * Step: Set system memory address.
   *
   *    For STM32F103, system memory is on 0x1FFF F000
   *    For other families, check AN2606 document table 110 with descriptions of memory addresses
   */
//volatile uint32_t addr = 0x1FFFF000;
/**
   * Step: Set system memory address.
   *
   *    For STM32F107, system memory is on 0x1FFF B000
   *    For other families, check AN2606 document table 110 with descriptions of memory addresses
   */
//volatile uint32_t addr = 0x1FFFB000;
/**
   * Step: Set system memory address.
   *
   *    For STM32F303, system memory is on 0x1FFF D800
   *    For other families, check AN2606 document table 110 with descriptions of memory addresses
   */
//volatile uint32_t addr = 0x1FFFD800;
/**
   * Step: Set system memory address.
   *
   *    For STM32L073, system memory is on 0x1FF0 0000
   *    For other families, check AN2606 document table 110 with descriptions of memory addresses
   */
volatile uint32_t addr = 0x1FF00000;

/**
   * Step: Disable RCC, set it to default (after reset) settings
   *    Internal clock, no PLL, etc.
   */
#if defined(USE_HAL_DRIVER)
HAL_RCC_DeInit();
#endif /* defined(USE_HAL_DRIVER) */
#if defined(USE_FULL_LL_DRIVER)
LL_RCC_DeInit();
#endif
#if defined(USE_STDPERIPH_DRIVER)
RCC_DeInit();
#endif /* defined(USE_STDPERIPH_DRIVER) */

/**
   * Step: Disable systick timer and reset it to default values
   */
SysTick->CTRL = 0;
SysTick->LOAD = 0;
SysTick->VAL = 0;

/**
   * Step: Disable all interrupts
   */
__disable_irq();

/**
   * Step: Remap system memory to address 0x0000 0000 in address space
   *    For each family registers may be different.
   *    Check reference manual for each family.
   *
   *    For STM32F4xx, MEMRMP register in SYSCFG is used (bits[1:0])
   *    For STM32F0xx, CFGR1 register in SYSCFG is used (bits[1:0])
   *    For others, check family reference manual
   */
//Remap by hand... {
#if defined(STM32F4)
SYSCFG->MEMRMP = 0x01;
#endif
#if defined(STM32L0)
SYSCFG->CFGR1 = 0x01;
#endif
#if defined(STM32F0)
SYSCFG->CFGR1 = 0x01;
#endif
//} ...or if you use HAL drivers
//__HAL_SYSCFG_REMAPMEMORY_SYSTEMFLASH(); //Call HAL macro to do this for you

/**
   * Step: Set jump memory location for system memory
   *    Use address with 4 bytes offset which specifies jump location where program starts
   */
SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4)));

/**
   * Step: Set main stack pointer.
   *    This step must be done last otherwise local variables in this function
   *    don't have proper value since stack pointer is located on different position
   *
   *    Set direct address location which specifies stack pointer in SRAM location
   */
__set_MSP(*(uint32_t *)addr);

/**
   * Step: Actually call our function to jump to set location
   *    This will start system memory execution
   */
SysMemBootJump();

/**
   * Step: Connect USB<->UART converter to dedicated USART pins and test
   *    and test with bootloader works with STM32 Flash Loader Demonstrator software
   */
}
然后介绍下测试结果：
1、F0系列：STM32F030、STM32F051、STM32F070、STM32F071和STM32F072芯片，其中除STM32F070跳转运行ISP运行错误(发现内部ISP代码好像有问题，具体也不确定)外，均可以支持软件跳转ISP后串口方式升级；
2、F1系列：STM32F103和STM32F107芯片，均可以支持软件跳转ISP后串口方式升级；
3、F2系列：无芯片平台验证；
4、F4系列：STM32F407芯片，支持软件跳转ISP后串口方式升级；
5、L0系列：STM32L073芯片，支持软件跳转ISP后串口方式升级；
6、L4系列：STM32L4R5芯片，软件跳转ISP后运行直接跳转Hardfault(后续查找原因)；
7、其它系列均无平台验证；