Hard Fault STM32F103 beim Takteinstellen

[Vincent (Gast)]

Hallo,

ich versuche den Takt von einem STM32F103 µController auf 48MHz 
einzustellen. Es klappt leider nicht.

Wenn ich die Funktion System_Clock_Setup() bei der Initialisierung 
aufrufe, geht das in die Hard Fault. Weiss jemand zufällig woran es 
liegt?

Danke im Voraus.

Debugger Ausgabe:

Hello ARM World!
[HardFault]
Stack frame:
 R0 =  00000000
 R1 =  40061020
 R2 =  40021000
 R3 =  080018F9
 R12 = 01010101
 LR =  08000BAB
 PC =  08000A8E

Der Quellcode:

#include <stdio.h>
#include <stdlib.h>
#include "diag/Trace.h"
#include "stm32f10x.h"
#include "cortexm/ExceptionHandlers.h"


#define GPIOB_LED GPIO_Pin_2
#define GPIOC_BZZ GPIO_Pin_13

#define TIMER_FREQUENCY_HZ (1000u)


volatile uint32_t timer_delayCount;

void Delay(uint32_t ticks);
void TimingDelay_Decrement(void);


void System_Clock_Setup(void);

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wmissing-declarations"
#pragma GCC diagnostic ignored "-Wreturn-type"

void System_Clock_Setup(void) {
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_12); // 48MHz
  RCC_PLLCmd(ENABLE);

  while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) {
  }
  RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

  /* Set HCLK, PCLK1, and PCLK2 to SCLK (these are default */
  RCC_HCLKConfig(RCC_SYSCLK_Div1); // 48 MHz
  RCC_PCLK1Config(RCC_HCLK_Div2);  // APB1 24MHz, max 36MHz
  RCC_PCLK2Config(RCC_HCLK_Div1);  // APB2 48MHz
  RCC_ADCCLKConfig(RCC_PCLK2_Div4);  // 48MHz/4 = 12MHz

  RCC_ClocksTypeDef clocks;
  RCC_GetClocksFreq(&clocks);
  SysTick_Config(clocks.SYSCLK_Frequency / 100000); //10us
}

int main(int argc, char* argv[]) {

  trace_puts("Hello ARM World!");


  //SysTick_Config(SystemCoreClock / TIMER_FREQUENCY_HZ);
  System_Clock_Setup();

  trace_printf("System clock: %u Hz\n", SystemCoreClock);

  // Enable GPIO Peripheral clock
  /* GPIOA GPIOB and GPIOC clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  GPIO_InitTypeDef GPIO_InitStructure;

  /* PB2 LED configuration */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* PC13 Buzzer configuration */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  uint32_t seconds = 0;

  GPIO_SetBits(GPIOB, GPIOB_LED);
  GPIO_SetBits(GPIOC, GPIOC_BZZ);
  // Infinite loop
  while (1) {
    Delay(100);

    GPIOC->ODR ^= GPIOC_BZZ; // Toggle Buzzer
    GPIOB->ODR ^= GPIOB_LED; // Toggle LED

    Delay(100);

    ++seconds;

    // Count seconds on the trace device.
    trace_printf("Second %u\n", seconds);
  }
}

void Delay(uint32_t ticks) {
  timer_delayCount = ticks;
  while (timer_delayCount != 0u)
    ;
}

void TimingDelay_Decrement(void) {
  if (timer_delayCount != 0u) {
    --timer_delayCount;
  }
}

void SysTick_Handler(void) {
  TimingDelay_Decrement();
}

#pragma GCC diagnostic pop

[Stefan F. (Gast)]

Du hast vergessen, Wait States für den Flash Zugriff einzustellen.
Siehe http://stefanfrings.de/stm32/index.html#takt

[Vincent (Gast)]

Stefan U. schrieb:
> Du hast vergessen, Wait States für den Flash Zugriff einzustellen.
> Siehe http://stefanfrings.de/stm32/index.html#takt

Danke!!

mit

  FLASH_SetLatency(FLASH_Latency_2);

 gehts.