src/main/drivers/system_stm32f10x.c

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stdbool.h>
  19 #include <stdint.h>
  20 #include <stdlib.h>
  21
  22 #include "platform.h"
  23
  24 #include "gpio.h"
  25 #include "system.h"
  26
  27 #define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)
  28
  29 void systemReset(void)
  30 {
  31     // Generate system reset
  32     SCB->AIRCR = AIRCR_VECTKEY_MASK | (uint32_t)0x04;
  33 }
  34
  35 void systemResetToBootloader(void) {
  36     // 1FFFF000 -> 20000200 -> SP
  37     // 1FFFF004 -> 1FFFF021 -> PC
  38
  39     *((uint32_t *)0x20004FF0) = 0xDEADBEEF; // 20KB STM32F103
  40     systemReset();
  41 }
  42
  43
  44 void enableGPIOPowerUsageAndNoiseReductions(void)
  45 {
  46     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);
  47
  48     gpio_config_t gpio;
  49
  50     gpio.mode = Mode_AIN;
  51     gpio.pin = Pin_All;
  52     gpioInit(GPIOA, &gpio);
  53     gpioInit(GPIOB, &gpio);
  54     gpioInit(GPIOC, &gpio);
  55 }
  56
  57 bool isMPUSoftReset(void)
  58 {
  59     if (cachedRccCsrValue & RCC_CSR_SFTRSTF)
  60         return true;
  61     else
  62         return false;
  63 }