关于FreeRTOS使用IAP跳转是怎么回事

参考我们使用的跳转。
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/* * File      : rbl_jump_stm32f2_f4.c.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  This program is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *  GNU General Public License for more details. * *  You should have received a copy of the GNU General Public License along *  with this program; if not, write to the Free Software Foundation, Inc., *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Change Logs: * Date           Author       Notes * 2014-03-12     aozima       first version. * 2015-09-22     aozima       disable and clean up all interrupts. */#include #include 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 = 0xFFFFFFFF;            /* clean up interrupts flags. */            NVIC->ICPR = 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)))();}
rbl_jump_stm32f2_f4.c (3.29 KB )

参考我们使用的跳转。
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/* * File      : rbl_jump_stm32f2_f4.c.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  This program is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *  GNU General Public License for more details. * *  You should have received a copy of the GNU General Public License along *  with this program; if not, write to the Free Software Foundation, Inc., *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * Change Logs: * Date           Author       Notes * 2014-03-12     aozima       first version. * 2015-09-22     aozima       disable and clean up all interrupts. */#include #include 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 = 0xFFFFFFFF;            /* clean up interrupts flags. */            NVIC->ICPR = 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)))();}
rbl_jump_stm32f2_f4.c (3.29 KB )

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