STM32F407,用bootloader通过USB程序更新APP,当app程序中没有ucos系统时,每次都成功更新app程序且跳转。
当APP中有ucos时,更新完成后app程序无法顺利运行。
已经试过的方法如下:1,在bootloader跳转到app前,在bootloader中关闭外设和USB时钟。
2.在APP的OSStart()函数前重新偏移向量表。SCB->VTOR=FLASH_BASE|0x10000;
APP程序中有ucos系统,SD卡,FATFS文件描述等。(单独是可以运行的)
有人出现过类似的问题吗?求解决
//2018/8/11 解决ucos3无法跳转的问题
void jump_to_app(uint32_t app_address)
{
typedef void (*_func)(void);
__disable_irq();
/* MCU peripherals re-initial. */
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStruct.GPIO_Pin &= ~(GPIO_Pin_13 | GPIO_Pin_14); /* SWDIO/SWCLK */
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_All;
GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_Init(GPIOF, &GPIO_InitStruct);
GPIO_Init(GPIOG, &GPIO_InitStruct);
GPIO_Init(GPIOH, &GPIO_InitStruct);
GPIO_Init(GPIOI, &GPIO_InitStruct);
/* reset systick */
SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
/* disable all peripherals clock. */
RCC->AHB1ENR = (1<<20); /* 20: F4 CCMDAT ARAMEN. */
RCC->AHB2ENR = 0;
RCC->AHB3ENR = 0;
RCC->APB1ENR = 0;
RCC->APB2ENR = 0;
/* Switch to default cpu clock. */
RCC->CFGR = 0;
} /* MCU peripherals re-initial. */
/* Disable MPU */
MPU->CTRL &= ~MPU_CTRL_ENABLE_Msk;
/* disable and clean up all interrupts. */
{
int i;
for(i = 0; i < 8; i++)
{
/* disable interrupts. */
NVIC->ICER[i] = 0xFFFFFFFF;
/* clean up interrupts flags. */
NVIC->ICPR[i] = 0xFFFFFFFF;
}
}
/* Set new vector table pointer */
SCB->VTOR = app_address;
/* reset register values */
__set_BASEPRI(0);
__set_FAULTMASK(0);
/* set up MSP and switch to it */
__set_MSP(*(uint32_t*)app_address);
__set_PSP(*(uint32_t*)app_address);
__set_CONTROL(0);
/* ensure what we have done could take effect */
__ISB();
__disable_irq();
/* never return */
((_func)(*(uint32_t*)(app_address + 4)))();
}
或者说,我应该怎么设置中断向量
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