#include "stm32f0xx_hal.h"

#include "usart.h"
#include "config.h"
#include "gpio.h"
#include "dma.h"

UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_rx;
DMA_HandleTypeDef hdma_usart1_tx;

void uart_init(void)
{
    __USART1_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct;

    // Init gpio pins for uart
    GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF0_USART1;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    // Init UART periph
    huart1.Instance = USART1;
    huart1.Init.BaudRate = GPS_BAUDRATE;
    huart1.Init.WordLength = UART_WORDLENGTH_8B;
    huart1.Init.StopBits = UART_STOPBITS_1;
    huart1.Init.Parity = UART_PARITY_NONE;
    huart1.Init.Mode = UART_MODE_TX_RX;
    huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    huart1.Init.OneBitSampling = UART_ONEBIT_SAMPLING_DISABLED ;
    huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    HAL_UART_Init(&huart1);

 /* // Init UART DMA 
    hdma_usart1_rx.Instance = DMA1_Channel3;
    hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart1_rx.Init.MemInc = DMA_MINC_DISABLE;
    hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart1_rx.Init.Mode = DMA_CIRCULAR;
    hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;
    HAL_DMA_Init(&hdma_usart1_rx);

    __HAL_LINKDMA(huart,hdmarx,hdma_usart1_rx);

    hdma_usart1_tx.Instance = DMA1_Channel2;
    hdma_usart1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_usart1_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart1_tx.Init.MemInc = DMA_MINC_DISABLE;
    hdma_usart1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart1_tx.Init.Mode = DMA_NORMAL;
    hdma_usart1_tx.Init.Priority = DMA_PRIORITY_LOW;
    HAL_DMA_Init(&hdma_usart1_tx);

    __HAL_LINKDMA(huart,hdmatx,hdma_usart1_tx);
*/
    HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USART1_IRQn);
}

UART_HandleTypeDef* uart_gethandle(void)
{
    return &huart1;
}