src/platform/STM32/system_stm32f7xx.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <string.h>
  22 #include <stdbool.h>
  23 #include <stdint.h>
  24 #include <stdlib.h>
  25
  26 #include "platform.h"
  27
  28 #include "drivers/accgyro/accgyro_mpu.h"
  29 #include "drivers/exti.h"
  30 #include "drivers/nvic.h"
  31 #include "drivers/system.h"
  32 #include "drivers/persistent.h"
  33
  34 #include "stm32f7xx_ll_cortex.h"
  35
  36 #define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)
  37
  38 #define DEFAULT_STACK_POINTER ((uint32_t *) 0x1FF00000)
  39 #define SYSTEM_MEMORY_RESET_VECTOR ((uint32_t *) 0x1FF00004)
  40
  41 void SystemClock_Config(void);
  42
  43 void systemReset(void)
  44 {
  45     __disable_irq();
  46     NVIC_SystemReset();
  47 }
  48
  49 void systemResetToBootloader(bootloaderRequestType_e requestType)
  50 {
  51     switch (requestType) {
  52     case BOOTLOADER_REQUEST_ROM:
  53     default:
  54         persistentObjectWrite(PERSISTENT_OBJECT_RESET_REASON, RESET_BOOTLOADER_REQUEST_ROM);
  55
  56         break;
  57     }
  58
  59     __disable_irq();
  60     NVIC_SystemReset();
  61 }
  62
  63 bool isMPUSoftReset(void)
  64 {
  65     if (cachedRccCsrValue & RCC_CSR_SFTRSTF)
  66         return true;
  67     else
  68         return false;
  69 }
  70
  71 static void checkForBootLoaderRequest(void)
  72 {
  73     uint32_t bootloaderRequest = persistentObjectRead(PERSISTENT_OBJECT_RESET_REASON);
  74
  75     if (bootloaderRequest != RESET_BOOTLOADER_REQUEST_ROM) {
  76         return;
  77     }
  78     persistentObjectWrite(PERSISTENT_OBJECT_RESET_REASON, RESET_BOOTLOADER_POST);
  79
  80     __SYSCFG_CLK_ENABLE();
  81     SYSCFG->MEMRMP |= SYSCFG_MEM_BOOT_ADD0 ;
  82
  83     __set_MSP(*DEFAULT_STACK_POINTER);
  84
  85     ((void (*)(void))*SYSTEM_MEMORY_RESET_VECTOR)();
  86
  87     while (1);
  88 }
  89
  90 void systemInit(void)
  91 {
  92     persistentObjectInit();
  93
  94     checkForBootLoaderRequest();
  95
  96     //  Mark ITCM-RAM as read-only
  97     LL_MPU_ConfigRegion(LL_MPU_REGION_NUMBER0, 0, RAMITCM_BASE, LL_MPU_REGION_SIZE_16KB | LL_MPU_REGION_PRIV_RO_URO);
  98     LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
  99
 100     //SystemClock_Config();
 101
 102     // Configure NVIC preempt/priority groups
 103     HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITY_GROUPING);
 104
 105     // cache RCC->CSR value to use it in isMPUSoftReset() and others
 106     cachedRccCsrValue = RCC->CSR;
 107
 108     /* Accounts for OP Bootloader, set the Vector Table base address as specified in .ld file */
 109     //extern void *isr_vector_table_base;
 110     //NVIC_SetVectorTable((uint32_t)&isr_vector_table_base, 0x0);
 111     //__HAL_RCC_USB_OTG_FS_CLK_DISABLE;
 112
 113     //RCC_ClearFlag();
 114
 115     // Init cycle counter
 116     cycleCounterInit();
 117
 118     // SysTick
 119     //SysTick_Config(SystemCoreClock / 1000);
 120     HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 121
 122     HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 123 }