#include "main.h"
#include "delay.h"
#include "deviceSetup.h"
#include "usart.h"
#include "ascii.h"
#include "timer.h"
#include "i2c.h"

#include "stm32f042x6.h"
#include "hardwareDescription.h"

void setup();

void EXTI1_IRQHandler(void)
{
	if((EXTI->PR & EXTI_PR_PIF1) != 0) {
		
		pinToggle(pinB3);
		
		// clear flag
		EXTI->PR |= EXTI_PR_PIF1;
	}
}

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

	// https://controllerstech.com/external-interrupt-using-registers/
		
	pinConfig(pinA1, input, def_stage, pullUp, def_speed);
	// enable interrupt
	//NVIC_EnableIRQ(EXTI0_1_IRQn);
	

	// Connect
	RCC->APB2ENR |= RCC_APB2ENR_SYSCFGCOMPEN;
	SYSCFG->EXTICR[0] &= ~SYSCFG_EXTICR1_EXTI0;
	SYSCFG->EXTICR[0] |= SYSCFG_EXTICR1_EXTI0_PA;

	// rising trigger selection
	EXTI->RTSR |= EXTI_RTSR_RT1;

	// Interrupt mask register
	EXTI->IMR |= EXTI_IMR_IM1;
	
	
	NVIC_SetPriority (EXTI1__IRQn, 1);	
	NVIC_EnableIRQ(EXTI1);	

	while(1);
/*
	while(1)
	{
		delayMs(100); 
		pinToggle(pinB3);
		delayMs(100); 
	}
*/	
	return 1;
}

void setup()
{
	uint8_t i = 0;

	delayInitMs(8000000, 1000); // Clock Freq and Divider for ARM library 
	
	pinConfig(pinB3, output, pushPull, def_res, def_speed);
	pinConfig(pinA0, input, def_stage, pullDown, def_speed);	
	
	setupInit(); // This is the sescond call of System init the assebly start code is calling it before the main.	
	
	usartInit(	usart2, 
				pinA2, 
				pinA15,
				115200,
				eight, 
				NO_PARITY_CTRL,
				noFlowControl); 

	//clears screen and send the wellcome messgae
	print_Usart(usart2, ASCII_clear); 
	print_Usart(usart2, "Hello to our KED project\n\r"); 
	

	//blinks 10 times to indicate the sicsessfull init if the device
	for(i = 0 ; i < 10 ; i++) {
		delayMs(100); 
		pinToggle(pinB3);
		delayMs(100); 
	}

	pinWrite(pinB3,0);
}