#include "stm32f10x.h"

/*
GPIO :  
      PC.14  PC.15 <---> LED

              PB.7 <---> Button


        PA.9 PA.10 <---> USART
*/
#define RCC_APB2ENR    *(uint32_t*)(0x40021000+0x18)
#define RCC_APB1ENR    *(uint32_t*)(0x40021000+0x1C)
#define GPIOC_CRH    *(uint32_t*)(0x40011000+0x04)
#define GPIOC_ODR    *(uint32_t*)(0x40011000+0x0C)
#define GPIOB_CRL    *(uint32_t*)(0x40010C00+0x00)
#define GPIOB_ODR    *(uint16_t*)(0x40010C00+0x0C)
#define GPIOB_BSRR   *(uint16_t*)(0x40010C00+0x10)
#define SETENA_ISER0    *(uint32_t*)(0xe000E100+0x00)
#define EXTI_IMR        *(uint32_t*)(0x40010400+0x00)
#define EXTI_RTSR       *(uint32_t*)(0x40010400+0x08)
#define EXTI_FTSR       *(uint32_t*)(0x40010400+0x0C)
#define EXTI_PR         *(uint32_t*)(0x40010400+0x14)
#define AFIO_EXTICR2    *(uint32_t*)(0x40010000+0x0C)

#define GPIOA_IDR    *(uint32_t*)(0x40010800+0x08)
#define GPIOA_ODR    *(uint32_t*)(0x40010800+0x0C)
#define GPIOA_CRH    *(uint32_t*)(0x40010800+0x04)
#define SETENA_ISER1    *(uint32_t*)(0xe000E100+0x04)


//#define USART1_BASE    *(uint32_t*)(0x40013800+0x00)  //bug : redefinition
#define USART1_SR    *(uint32_t*)(0x40013800+0x00)
#define USART1_DR    *(uint32_t*)(0x40013800+0x04)
#define USART1_BRR    *(uint32_t*)(0x40013800+0x08)
#define USART1_CR1    *(uint32_t*)(0x40013800+0x0C)
#define USART1_CR2    *(uint32_t*)(0x40013800+0x10)
#define USART1_CR3    *(uint32_t*)(0x40013800+0x14)

#define TIM1_CR1      *(uint32_t*)(0x40012c00+0x00)
#define TIM1_DIER     *(uint32_t*)(0x40012c00+0x0C)
#define TIM1_SR       *(uint32_t*)(0x40012c00+0x10)
#define TIM1_PSC      *(uint32_t*)(0x40012c00+0x28)
#define TIM1_ARR      *(uint32_t*)(0x40012c00+0x2C)

#define TIM3_CR1      *(uint32_t*)(0x40000400+0x00)
#define TIM3_DIER      *(uint32_t*)(0x40000400+0x0C)
#define TIM3_SR      *(uint32_t*)(0x40000400+0x10)
#define TIM3_PSC      *(uint32_t*)(0x40000400+0x28)
#define TIM3_ARR      *(uint32_t*)(0x40000400+0x2C)



#if 1
int m = 0;
void EXTI9_5_IRQHandler(void)
{
   EXTI_PR = 0x1 << 7;
	 m++;
	 if(m%2 == 1)
	    GPIOC_ODR	= 0x0 << 14; 
	 else if(m%2 == 0)
		  GPIOC_ODR	= 0x3 << 14;
}
#endif


char test_str[128];
char* p;
int i;

volatile int mm = 0;
volatile int old_mm  = 0;
char recv_buf[64];
int  num = 0;
int is_one_line = 0;
void USART1_IRQHandler(void)
{
	  USART_ClearITPendingBit(USART1, USART_IT_RXNE);
    mm += 10;
	
	  recv_buf[num++] = USART1_DR;
	  if(num >= 64)
			 num = 0;
		if(recv_buf[num-1] == 0x0a && recv_buf[num-2] == 0x0d)
			 is_one_line = 1;
}



int time1_out    = 0;
int old_time1_out= 0;

#if 1
void TIM1_UP_IRQHandler(void)
{
    TIM_ClearITPendingBit(TIM1, TIM_FLAG_Update);
    time1_out++;
	
}
#else
void TIM3_IRQHandler(void)
{
    TIM_ClearITPendingBit(TIM3, TIM_FLAG_Update);
    time1_out++;
	
}


#endif




int main()
{
	

	
	RCC_APB2ENR = 0x1 << 4 | 0x1 << 3 | 0x1 << 0 | 0x1 << 2 | 0x1 << 14  /*| 0x1 << 11 */ ;     //p53
  GPIOC_CRH = 0x03 << 28 | 0x03 << 24;	//p68
	
	GPIOB_CRL   = 0x00 <<28 |  /*0x01*/ /*0x10 --bug */0x02 << 30;  
	
  GPIOC_ODR	= 0x3 << 14;            //p69
	
	
	EXTI_IMR  = 0x01 << 7;
//EXTI_RTSR = 0x01 << 7;
	EXTI_FTSR = 0x01 << 7;
	
	AFIO_EXTICR2 = 0x01  << 12;


  GPIOA_ODR = 0x1 << 9;

  GPIOA_CRH = 0x3 << 4 | 0x2 << 6 | 0x0 << 8 | 0x1 << 10;



	SETENA_ISER0 = 0x1 << 23;
	SETENA_ISER1 = 0x1 << 5;
	
	
	
	
	
			USART1_BRR = 0x0271;
			USART1_CR1 |= 0x03 << 2;  //TE/RE
		
			USART1_CR1 |= 0x1 << 5 /* | 0x1 <<7*/;
			
			USART1_CR1 |= 0x1 << 13;
		

#if 1



  RCC_APB2ENR |= (0x1 << 11);
  TIM1_CR1  |= 0x1 << 0;   //CEN
	TIM1_DIER |= 0x1 << 0;   //UIE
	TIM1_SR   &= 0xFFFE;     //UIF
	
	TIM1_PSC  = 7199;
	TIM1_ARR  = 9999;

  SETENA_ISER0  |=  0x01 << 25;
  
#else
  RCC_APB1ENR |= 0x1 << 1;
  TIM3_CR1  |= 0x1 << 0;   //CEN
	TIM3_DIER |= 0x1 << 0;   //UIE
	TIM3_SR   &= 0xFFFE;     //UIF
	
	TIM3_PSC  = 7199;
	TIM3_ARR  = 9999;

  SETENA_ISER0  |=  0x01 << 29;

#endif

 
 
   while(1)
	 {

   		 if(is_one_line == 1)
			 {
						memset(test_str, 0, sizeof(test_str));

   				  sprintf( test_str, "%s", recv_buf);

						p = test_str;
						while((*p)!='\0')
						{
							USART_SendData(USART1, *(p++));
							for(i=0; i < 1000; i++)
								 ;
						}			
						num = 0;
						is_one_line = 0;
						memset(recv_buf, 0, sizeof(recv_buf));

			 }
			 
			 
			 
			 if(old_time1_out == time1_out)
				   ;
			 else
			 {
						memset(test_str, 0, sizeof(test_str));

			    	sprintf( test_str, "old: %d, time1_out:%d", old_time1_out, time1_out);

						p = test_str;
						while((*p)!='\0')
						{
							USART_SendData(USART1, *(p++));
							for(i=0; i < 1000; i++)
								 ;
						}			
				   
				 
			     old_time1_out = time1_out;
			 }
       
			 
	 }

	 return 0;
	 
	

}