ChibiOS Free Embedded RTOS

Code: Select all

void __early_init(void)
{
  stm32_clock_init();

  #ifdef FSMC_USED

  // CLOCK the peripheral
  #if defined(STM32F10X_HD)
  RCC->AHBENR |= RCC_AHBENR_FSMCEN;
  #elif defined(STM32F4XX)
  RCC->AHB3ENR |= RCC_AHB3ENR_FSMCEN;
  #else
  #error "Not supported device!"
  #endif

  // SETUP FSMC to work correctly
  FSMC_Bank1->BTCR[0] = FSMC_BCR1_WREN | FSMC_BCR1_MWID_0 | FSMC_BCR1_MBKEN; // FSMC_BCR1 register
  FSMC_Bank1->BTCR[1] = FSMC_BTR1_DATAST_1 | FSMC_BTR1_DATAST_0;             // FSMC_BTR1 register
  #endif
}

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 file 'os\hal\platforms\STM32F4xx\hal_lld.c'
...
89 /**
90  * @brief   Low level HAL driver initialization.
91  *
92  * @notapi
93  */
94 void hal_lld_init(void) {
95 
96   /* Reset of all peripherals. AHB3 is not reseted because it could have
97      been initialized in the board initialization file (board.c).*/
98   rccResetAHB1(~0);
98   rccResetAHB2(~0);
99   rccResetAHB3(~0);
100 rccResetAPB1(~RCC_APB1RSTR_PWRRST);
101 rccResetAPB2(~0);