//
// I2C: Initialize I2C peripheral and return a reference to the port
//

#include "i2c.h"
#include "gpio.h"

I2C_HandleTypeDef hi2c1;

void i2c_init(void)
{
    __GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    __I2C1_CLK_ENABLE();

    hi2c1.Instance = I2C1;
    hi2c1.Init.Timing = 0x2000090E;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;
    HAL_I2C_Init(&hi2c1);

    HAL_I2CEx_AnalogFilter_Config(&hi2c1, I2C_ANALOGFILTER_ENABLED);
}


// Get pointer to I2C port
I2C_HandleTypeDef* i2c_get(void)
{
    return &hi2c1;
}