#include <inttypes.h>
#include "stm32f10x_flash.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_map.h"
#include "stm32f10x_nvic.h"
#include "wiring.h"
#include "systick.h"
#include "gpio.h"

void RCC_Configuration(void);
void NVIC_Configuration(void);

void init(void) {
   RCC_Configuration();
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |
                          RCC_APB2Periph_GPIOB |
                          RCC_APB2Periph_GPIOC |
                          RCC_APB2Periph_AFIO
                        , ENABLE);
   NVIC_Configuration();

   systick_init();

   gpio_init();

   /* off for debug  */
//   adc_init();

//   timer_init(1, 1);
//   timer_init(2, 1);
//   timer_init(3, 1);
//   timer_init(4, 1);
}

void NVIC_Configuration(void) {
#ifdef VECT_TAB_ROM
  NVIC_SetVectorTable(USER_ADDR_ROM, 0x0);
#elifdef VECT_TAB_RAM
  NVIC_SetVectorTable(USER_ADDR_RAM, 0x0);
#else // VECT_TAB_BASE
   /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}


void RCC_Configuration(void) {
   ErrorStatus HSEStartUpStatus;
   /* RCC system reset(for debug purpose) */
   RCC_DeInit();

   /* Enable HSE */
   RCC_HSEConfig(RCC_HSE_ON);

   /* Wait till HSE is ready */
   HSEStartUpStatus = RCC_WaitForHSEStartUp();

   if(HSEStartUpStatus == SUCCESS) {
      /* Enable Prefetch Buffer */
      FLASH_PrefetchBufferCmd( (u32)FLASH_PrefetchBuffer_Enable);

      /* Flash 2 wait state */
      FLASH_SetLatency(FLASH_Latency_2);

      /* HCLK = SYSCLK */
      RCC_HCLKConfig(RCC_SYSCLK_Div1);

      /* PCLK2 = HCLK APB2 Periphs, no prescaler 72MHz */
      RCC_PCLK2Config(RCC_HCLK_Div1);

      /* PCLK1 = HCLK/2 APB1 periphs = 36MHZ*/
      RCC_PCLK1Config(RCC_HCLK_Div2);

      /* PLLCLK = 8MHz * 9 = 72 MHz */
      RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

      /* Enable PLL */
      RCC_PLLCmd(ENABLE);

      /* Wait till PLL is ready */
      while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
          ;

      /* Select PLL as system clock source */
      RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

      /* Wait till PLL is used as system clock source */
      while(RCC_GetSYSCLKSource() != 0x08)
          ;
   }
}