#include "init.h"

// PA4
void GPIO_Ini(void) {
    GPIO_InitTypeDef gpio;
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    gpio.GPIO_Pin = GPIO_Pin_4;
    gpio.GPIO_Mode = GPIO_Mode_AN;
    gpio.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &gpio);
}

void TIM_Ini(void) {
    TIM_TimeBaseInitTypeDef tim;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    
    tim.TIM_Prescaler = 0;
    tim.TIM_CounterMode = TIM_CounterMode_Up;
    tim.TIM_Period = 1000 - 1;
    tim.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInit(TIM2, &tim);

    TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
    TIM_Cmd(TIM2, ENABLE);
}

void DAC_Ini(void) {
    DAC_InitTypeDef dac;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

    dac.DAC_Trigger = DAC_Trigger_T2_TRGO;
    dac.DAC_WaveGeneration = DAC_WaveGeneration_None;
    dac.DAC_OutputBuffer = DAC_OutputBuffer_Enable;

    DAC_Init(DAC_Channel_1, &dac);
    DAC_Cmd(DAC_Channel_1, ENABLE);

    DAC_DMACmd(DAC_Channel_1, ENABLE);
}

void DMA_Ini(uint16_t *buffer, uint32_t size) {
    DMA_InitTypeDef dma;
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

    DMA_DeInit(DMA1_Stream5);
    dma.DMA_Channel = DMA_Channel_7;

    dma.DMA_PeripheralBaseAddr = (uint32_t)&DAC->DHR12R1;
    dma.DMA_Memory0BaseAddr = (uint32_t)buffer;
    dma.DMA_DIR = DMA_DIR_MemoryToPeripheral;
    dma.DMA_BufferSize = size;
    dma.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    dma.DMA_MemoryInc = DMA_MemoryInc_Enable;         
    dma.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    dma.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    dma.DMA_Mode = DMA_Mode_Circular;
    dma.DMA_Priority = DMA_Priority_High;
    dma.DMA_FIFOMode = DMA_FIFOMode_Disable;
    dma.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    dma.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

    DMA_Init(DMA1_Stream5, &dma);
    DMA_Cmd(DMA1_Stream5, ENABLE);
}