#include <stdio.h>
#include <timer.h>
#include <stm32f4xx_rcc.h>
#include <stm32f4xx_tim.h>
#include <stm32f4xx_dac.h>
#include <stm32f4xx_gpio.h>
#include <stm32f4xx_dma.h>
#include <stm32f4xx.h>
#include <gpio.h>
#include <stm32f4xx.h>
#include <dac.h>


#define DAC_DHR12R2_ADDRESS         0x40007414
#define DAC_DHR8R1_ADDRESS          0x40007410


const TIM_TypeDef* _timer_dev_table[14]={TIM1,TIM2,TIM3,TIM4,TIM5,TIM6,TIM7,
                                         TIM8,TIM9,TIM10,TIM11,TIM12,TIM13,TIM14};



int dacopen(uint32_t pin)
{
#define GPIOGETPORT(gpio)   ((GPIO_TypeDef*)(((((uint32_t)gpio) & (uint32_t)0x0000FF00)*(uint32_t)4) + (uint32_t)GPIOA))
#define GPIOPORTNUM(gpio)   (((uint32_t)(gpio) & (uint32_t)0x0000FF00)>>(uint32_t)8)
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1 , ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
    gpio_t DACOUT;
    DACOUT = gpioopen(pin);
    DACOUT |= gpioan | gpionopulltype;
    gpiosetconfig(&DACOUT);
    return 0;
}

int dacsetconfig(int timer, int buffer_size, int dac, uint32_t dac_type, uint32_t samplingFreq, void *data)
{
#include <core.h>
    DAC_InitTypeDef  DAC_InitStructure;
    TIM_TypeDef* tim = (TIM_TypeDef*)_timer_dev_table[timer];
    TIM_TimeBaseInitTypeDef    TIM_TimeBaseStructure;
    DMA_InitTypeDef DMA_InitStructure;
    if(timer>=timer2 && timer <= timer7)RCC_APB1PeriphClockCmd((1<<(timer-1)), ENABLE);
    if(timer==timer8)RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);
    uint32_t timfreq = getCpuFreq()/2;
    uint32_t period = timfreq/samplingFreq - 1;
    uint16_t PrescalerValue=0;
    while (period>=0x0FFFF)
    {
        PrescalerValue++;
        timfreq = getCpuFreq()/(2*(PrescalerValue+1));
        period = (timfreq/samplingFreq) - 1;
    }
    printf("period = %d \n\r prescaler = %d \n\r",period,PrescalerValue);
    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Period = 10;
    TIM_TimeBaseStructure.TIM_Prescaler = 0;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
    TIM_SelectOutputTrigger(tim, TIM_TRGOSource_Update);
    TIM_ARRPreloadConfig(tim, ENABLE);
    TIM_Cmd(tim, ENABLE);

    if (timer == timer2)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;
    if (timer == timer4)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T4_TRGO;
    if (timer == timer5)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T5_TRGO;
    if (timer == timer6)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
    if (timer == timer7)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T7_TRGO;
    if (timer == timer8)DAC_InitStructure.DAC_Trigger = DAC_Trigger_T8_TRGO;
    DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
    DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
    if (dac == DAC1){
        DAC_Init(DAC_Channel_1, &DAC_InitStructure);
        DMA_DeInit(DMA1_Stream5);
    }

    if (dac == DAC2){
        DAC_Init(DAC_Channel_2, &DAC_InitStructure);
        DMA_DeInit(DMA1_Stream6);
    }

    DMA_InitStructure.DMA_Channel = DMA_Channel_7;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)dac_type;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)data;
    DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    DMA_InitStructure.DMA_BufferSize = buffer_size;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

    if (dac == DAC1){
        DMA_Init(DMA1_Stream5, &DMA_InitStructure);
        DMA_Cmd(DMA1_Stream5, ENABLE);
        DAC_DMACmd(DAC_Channel_1, ENABLE);
        DAC_Cmd(DAC_Channel_1, ENABLE);

    }
    if (dac == DAC2){
        DMA_Init(DMA1_Stream6, &DMA_InitStructure);
        DMA_Cmd(DMA1_Stream6, ENABLE);
        DAC_DMACmd(DAC_Channel_2, ENABLE);
        DAC_Cmd(DAC_Channel_2, ENABLE);

    }
    return 0;

}