/* PA1 <-> PA4 */

#include "stm32f4xx_syscfg.h"
#include "stm32f4xx_conf.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_tim.h"
#include "stm32f4xx_exti.h"
#include "stm32f4xx_dac.h"
#include "stm32f4xx_adc.h"
#include "stm32f4xx_usart.h"
#include "stm32f4xx_spi.h"
#include "tm_stm32f4_lis302dl_lis3dsh.h"
#include "misc.h"

double Vmeas = 0; // To odczytujemy
uint16_t data = 0;
uint16_t amp = 278;

void TIM4_IRQHandler(void)
{
         	if(TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
         	{
         		if(data >= amp)	{
         			data = 0;
         		}
         		else {
         			data += amp/200.0;
         		}
         		DAC_SetChannel1Data(DAC_Align_12b_R, data);

                // wyzerowanie flagi wyzwolonego przerwania
                TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
         	}
}

void EXTI0_IRQHandler(void)
{
         	if(EXTI_GetITStatus(EXTI_Line0) != RESET)
         	{
         		amp += 278;

         		EXTI_ClearITPendingBit(EXTI_Line0);
         	}
}

int main(void)
{
	SystemInit();

	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA , ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

	// DAC
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_1;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	DAC_InitTypeDef DAC_InitStructure;
	DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
	DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
	DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
	DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
	DAC_Init(DAC_Channel_1, &DAC_InitStructure);

	DAC_Cmd(DAC_Channel_1, ENABLE);

	//ADC
	ADC_CommonInitTypeDef ADC_CommonInitStructure;
	ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
	ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
	ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
	ADC_CommonInit(&ADC_CommonInitStructure);

	ADC_InitTypeDef ADC_InitStructure;
	ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
	ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
	ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_NbrOfConversion = 1;
	ADC_Init(ADC1, &ADC_InitStructure);

	ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_84Cycles);

	ADC_Cmd(ADC1, ENABLE);

	// Timer
	// 100Hz
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
	TIM_TimeBaseStructure.TIM_Period = 8399;
	TIM_TimeBaseStructure.TIM_Prescaler = 99;
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

	TIM_Cmd(TIM4, ENABLE);

	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);

	TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
	TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);

	//Przycisk
	NVIC_InitTypeDef NVIC_InitStructure2;
	NVIC_InitStructure2.NVIC_IRQChannel = EXTI0_IRQn;
	NVIC_InitStructure2.NVIC_IRQChannelPreemptionPriority = 0x00;
	NVIC_InitStructure2.NVIC_IRQChannelSubPriority = 0x00;
	NVIC_InitStructure2.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure2);

	EXTI_InitTypeDef EXTI_InitStructure;
	EXTI_InitStructure.EXTI_Line = EXTI_Line0;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);

	SYSCFG_EXTILineConfig(GPIOA, EXTI_PinSource0);

	for(;;)
	{
		uint16_t ADC_Result;

		ADC_SoftwareStartConv(ADC1);
		while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
			ADC_Result = ADC_GetConversionValue(ADC1);

		Vmeas = (ADC_Result * 2.95) / 4095.0;
	}

}